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Preventing the distortion of CoO6 Octahedra of LiCoO2 at High-Voltage Operation of Lithium-Ion Battery: An Organic Surface reinforcement

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Polymers 2023年第9期15卷

作者： Wang, Fu-Ming Graduate Institute of Applied Science and Technology National Taiwan University of Science and Technology Taipei106335 Taiwan Sustainable Energy Center National Taiwan University of Science and Technology Taipei106335 Taiwan Department of Chemical Engineering Chung Yuan Christian University Taoyuan320314 Taiwan R&D Center for Membrane Technology Chung Yuan Christian University Taoyuan320314 Taiwan

Lithium cobalt oxide (LiCoO2, LCO) has been widely used in electronic markets due to its high energy density and wide voltage range applications. recently, high-voltage (HV, >4.5 V) operation has been required to obey the requirements of high energy density and cycle life in several applications such as electric vehicles and energy storage. However, the HV operation causes structure instability due to the over de-lithiation of LCO, as well as decomposing common carbonate solvents, thereby incurring the decay of battery performance. Moreover, a distortion of the CoO6 octahedra of LCO during de-lithiation induces a rehybridization of the Co 3d and O 2p orbitals. According to above reasons, decreasing the Co-O covalent bond promptly triggers high risks that significantly limit further use of LCO. In this research, an organic surface reinforcement by using bismaleimide–uracil (BU) that electrochemically forms a cathode electrolyte interphase (CEI) on LCO was explored. The results of electrochemical impedance spectroscopy and battery performance, such as the c-rate and cyclability tests, demonstrated that the modified CEI formed from BU significantly prevents the distortion of CoO6 octahedra. X-ray photoelectronic spectroscopy and in situ XAS indicated less LiF formation and higher bond energy of Co-O improved. Finally, the differential scanning calorimetry showed the onset temperature of decomposition of LCO was extended from 245 to 270 °C at 100% state of charge, which is about a 25 °C extension. The exothermic heat of LCO decreased by approximately 30% for high-safety use. This research confirms that the BU is eligible for high voltage (>4.5 V) LCO and presents outstanding electrochemical properties and safety performances. © 2023 by the author.

关键词： Cobalt compounds

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Investigations of an organic coverage to Ni-rich cathode materials: Effects on deteriorated, cathode electrolyte interphase, and chemical crossover

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Journal of Energy Storage 2024年 92卷

作者： Yuwono, rio Akbar Khotimah, Chusnul Wang, Fu-Ming Wu, Nae-Lih Imawan, Arif Cahyo Foeng, ruben Huang, Pin-Cheng Liu, Guan-Yi Haw, Shu-Chih Sheu, Hwo-Shuenn Graduate Institute of Applied Science and Technology National Taiwan University of Science and Technology Taipei Taiwan Graduate Institute of Energy and Sustainability Technology National Taiwan University of Science and Technology Taipei Taiwan Department of Chemical Engineering Chung Yuan Christian University Taoyuan Taiwan R&D Center for Membrane Technology Chung Yuan Christian University Taoyuan Taiwan Department of Chemical Engineering National Taiwan University Taipei Taiwan National Synchrotron Radiation Research Center Hsinchu Taiwan

Ni-rich cathodes inherit surface residual lithium compounds (SrLCs) for several reasons, such as cation mixing, oxygen vacancies, and the spontaneous reduction of high-Ni valence ions. Consequently, Ni-rich compounds must be treated before use to maximize their performance. This study describes the development of an organic coverage (OC) that can be directly utilized with a deteriorated Ni-rich cathode. The OC is synthesized from 5,5-dimethylbarbituric acid and polyethylene glycol diacrylate to provide two functions for the deteriorated Ni-rich cathode surface: spontaneous ion exchange and the self-electrochemical oxidation of Ni ions. SrLCs, such as Li2CO3 and LiOH, decompose through a transformation reaction from the trioxo to the dioxo form of the OC structure. Then this lithiated OC forms an organic artificial cathode electrolyte interface on the cathode surface, which further reduces the effects of chemical crossover on the anode side. It is also believed that the dioxo form promotes Ni2+ self-oxidation on the surface of Ni-rich cathodes and recovers the original Ni3+ valence state by Li+ re-intercalation. Thus, the capacities of the deteriorated LiNiO2 and LiNi0.8Mn0.1Co0.1O2 recover almost to their original values and retain the same excellent cycle performance as that of the fresh compounds. © 2024 Elsevier Ltd

关键词： Electrolytes

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PAN electrospun nanofiber skeleton induced MOFs continuous distribution in MMMs to boost CO2 capture

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JOUrNAL OF membrane science 2022年第0期650卷

作者： Zheng, Wenji Li, Ziheng Sun, Tianqi ruan, Xuehua dai, Yan Li, Xiangcun Zhang, Chuling He, Gaohong Dalian Univ Technol R&D Ctr Membrane Science& Technol State Key Lab Fine Chem Dalian 116023 Peoples R China Dalian Univ Technol Sch Chem Engn Panjin 124221 Peoples R China Dalian Univ Technol Panjin Inst Ind Technol Liaoning Key Lab Chem Addit Synth & Separat Panjin 124221 Liaoning Peoples R China

Metal organic frameworks (MOFs) based mixed matrix membrane (MMM) for CO2 capture shows insufficient CO2 permeability due to random disperse of MOFs in form of individual particle. Therefore, in this work, a continuous MOFs transport pathway for CO2 with low resistance was constructed in the MMM by assistance of electrospun nanofiber. Specifically, PAN electrospun nanofiber mat (NFM) was utilized as skeleton to obtain continuous ZIF-8 nanofibers. Then flexible polyethylene glycol (PEG) molecules were photo-polymerized in situ into the inner-voids within ZIF-8@PAN NFM to form dense membrane. As a result, ZIF-8 particles are distributed in PEO matrix continuously, leading to a low-resistance transport pathway for gas molecules in MMM, which is proved by the cross-sectional SEM images. Furthermore, the higher Tg of ZIF-8@PAN-x/PEO MMM by dSC also indicates the good interfacial compatibility between ZIF-8 and PEO. Compared with pure PEO membrane, all the ZIF-8@PAN-x/PEO MMMs present both enhanced CO2 permeability and CO2/N-2 selectivity. The enhanced CO2 permeability is attributed to the continuous ZIF-8 transport pathway, and the improved selectivity is ascribed to the size screening from nanofibers overlapping and stacking and the tortuous transport pathway. Importantly, compared with ZIF-8/PEO MMM, in which ZIF-8 particles are randomly dispersed into PEO matrix, the ZIF8@PAN-4/PEO MMM with the same ZIF-8 loading of about 16.6 wt% presents enhanced CO2 permeability and CO2/N-2 selectivity, which are increased by 52.4% and 44.3%, respectively. This is due to the continuous ZIF-8 transport pathway and good interfacial compatibility, which is also confirmed by the result of gas diffusivity and solubility coefficients. Together with the outstanding mechanical strength and stability, the proposed MMM with continuous ZIF-8 transport pathway paves a new way to improve CO2 permeability.

关键词： Nanofibers Continuous MOFs CO2 capture MMM

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Mind reasoning Manners: Enhancing Type Perception for Generalized Zero-shot Logical reasoning over Text

arXiv

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arXiv 2023年

作者： Xu, Fangzhi Liu, Jun Lin, Qika Zhao, Tianzhe Zhang, Jian Zhang, Lingling School of Computer Science and Technology Xi’an Jiaotong University Xi’an China Shaanxi Province Key Laboratory of Satellite and Terrestrial Network Tech. R&D National Engineering lab for Big Data Analytics Xi’an China

Logical reasoning task involves diverse types of complex reasoning over text, based on the form of multiple-choice question answering. Given the context, question and a set of options as the input, previous methods achieve superior performances on the full-data setting. However, the current benchmark dataset has the ideal assumption that the reasoning type distribution on the train split is close to the test split, which is inconsistent with many real application scenarios. To address it, there remain two problems to be studied: (1) How is the zero-shot capability of the models (train on seen types and test on unseen types)? (2) How to enhance the perception of reasoning types for the models? For problem 1, we propose a new benchmark for generalized zero-shot logical reasoning, named ZsLr. It includes six splits based on the three type sampling strategies. For problem 2, a type-aware model TaCo is proposed. It utilizes both the heuristic input reconstruction and the contrastive learning to improve the type perception in the global representation. Extensive experiments on both the zero-shot and full-data settings prove the superiority of TaCo over the state-of-the-art methods. Also, we experiment and verify the generalization capability of TaCo on other logical reasoning dataset. © 2023, CC BY.

关键词： Benchmarking

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Investigation of the effects of different zwitterions in fabricating smart PVdF/graphene pervaporation membranes

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Separation and Purification Technology 2024年 335卷

作者： Manzanares, richmond L. Huang, Tsung-Han Setiawan, Owen Austria, Hannah Faye M. Chang, Huai-Che Tayo, Lemmuel L. Hung, Wei-Song Hu, Chien‐Chieh Lee, Kueir-rarn Lai, Juin-Yih School of Chemical Biological and Materials Engineering and Sciences Mapúa University Manila 1002 Philippines Graduate Institute of Applied Science and Technology Advanced Membrane Materials Research Center National Taiwan University of Science and Technology Taipei 10607 Taiwan Department of Chemical Engineering National Taiwan University of Science and Technology Taipei 106335 Taiwan Department of Biology School of Medicine and Health Sciences Mapúa University Makati 1200 Philippines R&D Center for Membrane Technology and Department of Chemical Engineering Chung Yuan University Chung Li 32023 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Taoyuan 320315 Taiwan

Although membrane separation processes including pervaporation have demonstrated their as an efficiency in chemical waste treatment and resource recovery, the increasingly complex wastes generated by different industrial sectors make it almost impossible for a single membrane that has a fixed set of properties to handler these kinds of contaminants. For this reason, stimuli responsive membranes that have tunable and switchable properties are necessary to be developed. In this research, we explore the impacts of zwitterion compounds as additives to previously formulated PVdF-graphene membrane where graphene was used to facilitate β-phase induction of PVdF, enhancing its piezoelectric properties. The incorporation of zwitterions intended to even promote the β -crystal phase of PVdF, which is also facilitated by an optimized quantity of graphene. The quantified β phase of pristine PVdF- (68.7 %) was observed to increase to 79.4 %-86.32 %, when different zwitterions are added. Moreover, output voltages from piezoelectric testing of membranes under various weights generated a voltage signal up to 1.69 V for the membrane with the 3-(1-Pyridinio-1-propanesulfonate) zwitterion, named as PG_zc membrane. Upon employing these membranes to dehydrate isopropanol by pervaporation, it was found out that PG shows a permeation flux (Pf) of 95.49 ± 9.18 g/m²h and 77 % water concentration in permeate (Wc_p) while the PG_zc.membrane displayed a Pf and Wc_p of 988.84 ± 51 g/m²h and 30 %, respectively. But upon application of an external voltage, it was found out that PG_zc's Wc_p rises from 30 % to 83 % with increasing voltage and while the Pf gradually falls from 988.84 ± 51 g/m²h to 432.51 ± 19 g/m²h. These findings indicate that the addition of an appropriate zwitterion could significantly influence the piezoelectric properties of PVdF-graphene membranes, enhancing their tuning cap

关键词： Pervaporation Piezoelectric Separation Zwitterions

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An AI Architecture for Power MOS rds-on-driven Lifetime Estimation

An AI Architecture for Power MOS Rds-on-Driven Lifetime Esti...

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Smart Systems Integration (SSI)

作者： Carmelo Pino Francesco rundo Concetto Spampinato Sebastiano Battiato ADG Power and Discretes R&D Division STMicroelectronics Catania Italy Department of Electrical Electronics and Computer Engineering PerCeiVe Lab Group University of Catania Catania Italy Department of Mathematics and Computer Science IP-LAB Group University of Catania Catania Italy

The components lifetime estimation is one of the main challenge in all engineering process specially in power electronics. The problem involves several domains of interest and is particularly felt, because, the estimation of the residual life with an acceptable degree of confidence, allows to carry out preventive measures in order to avoid the consequences of the malfunction and failure of the device at the end of its life. Considering a Power MOS, the distinctive element for understanding the end of life of this component can be obtained by observing the $rds_{on}$ curve during its life. The $rds_{on}$ curve works in an operating range during the correct life cycle, this curve exceeds a certain threshold when the device begins to have the first signs of degradation. The proposed method allows to evaluate the variation of the $rds_{on}$ by making predictions for understand when the device may stop working well. The method is based on a deep learning model trained with a dataset containing the cycle of life of several Power MOS. The pipeline is based on Artificial Intelligence techniques with regularization of the Jacobian of the gradient, designed to compensate for the inevitable measurement and conversion noises present in the system based on ST MCU. The experiments concern predictions of the $rds_{on}$ at 10, 15 and 20 steps and allow to obtain a good degree of accuracy for predicting the $\mathbf{rdS}_{-}\mathbf{on}$ at least 20 samples before. This allows to guarantee a preventive intervention when the prediction exceed the threshold considered for the correct operating range. The proposed pipeline allows to robustly characterize the threshold voltage of the device by means of a simple acquisition of voltages and currents at power-on, being able to monitor the evolution of this voltage over time and each time the device is used. The obtained results and the cross-validation performances are very promising and allow us to state that the proposed method

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Estimating crystal heights of GAA device from 2d SEM images

Estimating crystal heights of GAA device from 2D SEM images

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Metrology, Inspection, and Process Control XXXIX 2025

作者： Choi, Hyunsuk Song, Siho Cheon, Wooyoung Moon, Taejin Lee, Jaeyong Kwon, Yongjae Yi, Shinwook Ma, Ami Kim, Qhwan Chang, Kyu Baik doh, Jiseong Jeong, Jaehoon Joo, Sanghyun Jang, Sungjin Park, Sunghoon Park, Il-Suk Kim, dae Sin Computational Science and Engineering Team Korea Republic of Foundry Process Development Team Korea Republic of Advanced Process Development Lab 1 Korea Republic of Process Development Semiconductor R&D Center Samsung Electronics Co. Gyeonggi-do Hwaseong-Si18448 Korea Republic of

ISBN: (纸本)9781510686380

In Gate-All-Around (GAA) device, it is important to control the crystal height of source and drain (Sd) module to prevent unwanted defects. It has been mainly monitored by transmission electron microscope (TEM), but high cost and low throughput makes it unsustainable. In this study, we propose a method that predict structure height from Scanning Electron Microscope (SEM) images. We utilized own developed Technology Computer-Aided design (TCAd) and electron beam simulation tool to generate several thousand pairs of dataset, which is pairs of simulation structure and SEM image. Then, the dataset is used to train a neural network model to estimate the Sd crystal height of the GAA device. Finally, its performance was validated with experiment data. The estimated crystal height was consistent with the TEM data. The r squared between the predicted and measured height is over 0.9 and the mean relative error is around 15%. © 2025 SPIE.

关键词： High level synthesis

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A Framework for Future Net Zero and Sustainable Network Architecture

A Framework for Future Net Zero and Sustainable Network Arch...

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Communications and Networking (MECOM), IEEE Middle East Conference on

作者： Himanshu Agrawal Yifei ren Nasim Ferdosian Sourav dutta Goutam das reza Nejabati Vidyasagar Potdar Neminath Hubballi EECMS Curtin University Perth Australia G. S. S. School of Telecommunications IIT Kharagpur India CISCO California USA Blockchain R&D Lab Curtin University Perth Australia Dept of Computer Science and Engineering IIT Indore India

ISBN: (数字)9798350376715

ISBN: (纸本)9798350376722

The convergence of Net Zero and cutting-edge digital technologies such as IoT sensors, digital twins, and blockchains represents a new frontier in advancing the digital economy. Global adoption of digital technology was further accelerated during the global pandemic, driven by new ways of working, learning, and communicating. With the increasing focus on reducing global carbon emissions, the synergy between digital technologies and Net Zero offers a significant opportunity to combat climate change. The role of networks in this transition has often been underestimated. This paper explores how future network architecture can simultaneously meet growing functional demands and become more energy-efficient, thus playing a key role in achieving Net Zero goals. We introduce a novel Sustainable Energy-Efficient Network Architecture framework, designed to support sustainability objectives by enhancing energy efficiency of networks. Our key contributions in this paper include multiple use cases supporting future energy-efficient network architecture that are (i) enhanced CdrX for extended reality, (ii) digital twin of 5G radio access network, and (iii) power profiling and prediction of a virtualised base station. The selected use cases were chosen to demonstrate the practical impact of developing energy efficient network. Moreover, simulation results show the effectiveness of the proposed use cases.

关键词： Technological innovation 5G mobile communication Net zero Volume measurement Simulation Network architecture Energy efficiency digital twins Sustainable development radio access networks

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Effect of functionalized nanodiamonds and surfactants mediation on the nanofiltration performance of polyamide thin-film nanocomposite membranes

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desalination 2023年 555卷

作者： Subrahmanya, T.M. Lin, Jing-Yang Widakdo, Januar Austria, Hannah Faye M. Owen-Setiawan Chiao, Yu-Hsuan Huang, Tsung-Han Hung, Wei-Song Matsuyama, Hideto Lee, Kueir-rarn Lai, Juin-Yih Advanced Membrane Materials Research Center Graduate Institute of Applied science and Technology National Taiwan University of Science and Technology Taipei10607 Taiwan Department of Physics Faculty of Mathematics and Natural Sciences Universitas Indonesia Depok16424 Indonesia Department of Chemical Engineering and Materials Science Yuan Ze University Taoyuan32023 Taiwan Research Center for Membrane and Film Technology Kobe University 1-1 Rokkodai Nada Kobe657-8501 Japan R&D Center for Membrane Technology Chung Yuan University Chung-Li32023 Taiwan

Thin film nanocomposite (TFN) membranes have drawn intensive attention for desalination. Herein, we investigate the effect of addition of different kinds of functionalized (Amine, Carboxylic acid, Hydrogen) nanodiamonds (Nds) and their dispersion enhanced by surfactants mediation on polypiperazineamide selective layer synthesized on polyamide membrane via Piperazine (PIP) and Trimesoyl chloride (TMC) interfacial polymerization (IP). The addition of functionalized Nds not only enhanced the surface roughness, hydrophilicity, and degree of crosslinking of selective layer but also enhanced the water flux and salt rejection performance of the membranes. The optimum NH2-Nd400/PIP/TMC membrane enhanced the water flux by 14 % and MgSO4 rejection by 2.4 % with respect to the conventional PIP/TMC membrane. To further enhance the performance, different chain length surfactants such as Sodium Octyl Sulfate (SOS) and Sodium dodecyl Sulfate (SdS) were added to the aqueous phase of IP system. The optimum SdS1/NH2-Nd400/PIP/TMC membrane showed improved flux and MgSO4 rejection of 8.87 Lm−2h−1b−1 and 98.68 %. It was further investigated for long term stability performance, which resulted in maximum flux and salt rejection of 15 Lm−2h−1b−1 and 99.57 % respectively, leading to increase of water flux by 87.5 % and MgSO4 rejection by 0.5 % with respect to the conventional PIP/TMC membrane. Overall, the highlight was that the SdS addition improved the membrane performance with well retained stability, indicating that the SdS has significantly improved the degree of crosslinking of selective layer via improved dispersion of PIP and NH2-Nds in aqueous phase during IP, making it mechanically more stable, hydrophilic and effective for MgSO4 rejection as compared to the conventional PIP/TMC membrane. The SdS1/NH2-Nd400/PIP/TMC membranes show great potential to be used in nanofiltration. © 2023

关键词： Nanofiltration

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Flower-shaped covalent organic framework synthesis and its anticancer drug delivery application

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Materials Chemistry and Physics 2024年 312卷

作者： Anbazhagan, rajeshkumar dinh, Thi Thuy Van krishnamoorthi, rajakumari Thankachan, darieo Tsai, Hsieh-Chih Chang, Yen-Hsiang Yang, Jen-Ming Graduate Institute of Applied Science and Technology National Taiwan University of Science and Technology Taipei106 Taiwan Advanced Membrane Materials Center National Taiwan University of Science and Technology Taipei106 Taiwan Department of Material Science and Engineering National Taiwan University of Science and Technology Taipei106 Taiwan R&D Centre for Membrane Technology Chung Yuan University Taoyuan320 Taiwan Department of Chemical and Materials Engineering Chang Gung University Taoyuan333 Taiwan Department of General Dentistry Chang Gung Memorial Hospital Taoyuan333 Taiwan Innovation of Life & Technology CO LTD No. 53 Ln. 447 Sec. 1 Wenhua 3rd Rd. Linkou Dist. New Taipei City244015 Taiwan

Fabrication of covalent organic frameworks (COFs) at room temperature is necessary due to their easy preparation, practical scale-up, and low cost to overcome the limitations of solvothermal and high-temperature synthesis. Herein, we fabricated flower-shaped COFs (FSCOFs) that were synthesized in various ratios of ortho-xylene and butanol mixture solvents. The FSCOFs exhibited excellent crystallinity with a pore size of approximately 10 nm, which was confirmed by PXrd and BET measurements. To utilize the FSCOFs as a drug carrier, doxorubicin (dOX) was loaded, followed by encapsulation of hyaluronic acid to increase the colloidal stability of FSCOFs in a physiological environment (FSCOFs-dOX-HA). The encapsulation efficiency and the drug loading capacity of FSCOFs-dOX-HA were 21.23 % and 29.82 %, respectively. Moreover, 92 % and 59 % of dOX is released in acidic environments and elevated GSH environments, proving the sensitivity of the FSCOFs as carriers. The excellent drug release mechanism of FSCOFs-HA-dOX is demonstrated by FSCOFs imine nitrogen protonation under acidic environment confirmed by its zeta potential changes under various physiological environments. The designed FSCOFs-dOX-HA was demonstrated to be a pH-sensitive drug carrier to deliver anticancer drugs into cancer cells. The MTT and drug internalization data demonstrated sustained dOX release from FSCOFs-dOX-HA. Finally, the real-time fluorescence demonstrates the effectiveness of the FSCOFs-dOX-HA upon cellular uptake and release of the anticancer drug. Thus, the FSCOFs system reported here opens a new path in COF research for drug carrier systems. © 2023

关键词： Hyaluronic acid

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