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Room Temperature Synthesis of Vertically Aligned Amorphous Ultrathin NiCo-LDH Nanosheets Bifunctional Flexible Supercapacitor Electrodes

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Energy & Environmental Materials 2024年第2期7卷 277-286页

作者： Kwadwo Asare Owusu Zhaoyang Wang Ali Saad Felix Ofori Boakye Muhammad Asim Mushtaq Muhammad Tahir Ghulam Yasin Dongqing Liu Zhengchun Peng Xingke Cai Institute for Advanced Study Shenzhen UniversityShenzhen 518060China College of Physics and Optoelectronics Shenzhen University3688 Nanhai BoulevardNanshan DistrictShenzhen 518060China School of Chemistry and Materials Science Hubei Engineering UniversityNo.272 Traffic AvenueXiaogan 432000China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyNo.122 Luoshi RoadWuhan 430070China Key Laboratory of Green Printing CAS Research Centre for Excellence in Molecular ScienceInstitute of Chemistry Chinese Academy of Sciences(ICCAS)Beijing 100190China College of Mechatronics and Control Engineering Shenzhen University3688 Nanhai BoulevardNanshan DistrictShenzhen 518050China

Developing a simple scalable method to fabricate electrodes with high capacity and wide voltage range is desired for the real use of electrochemical ***,we synthesized amorphous NiCo-LDH nanosheets vertically aligned on activated carbon cloth substrate,which was in situ transformed from Co-metal-organic framework materials nano-columns by a simple ion exchange process at room *** to the amorphous and vertically aligned ultrathin structure of NiCo-LDH,the NiCo-LDH/activated carbon cloth composites present high areal capacities of 3770 and 1480 mF cm^(-2)as cathode and anode at 2 mA cm^(-2),and 79.5%and 80%capacity have been preserved at 50 mA cm^(-2).In the meantime,they all showed excellent cycling performance with negligible change after>10000 *** fabricating them into an asymmetric supercapacitor,the device achieves high energy densities(5.61 mWh cm^(-2)and 0.352 mW cm^(-3)).This work provides an innovative strategy for simplifying the design of supercapacitors as well as providing a new understanding of improving the rate capabilities/cycling stability of NiCo-LDH materials.

关键词： amorphous nanosheets aqueous supercapacitor high volumetric/areal energy density NiCo-LDH room temperature synthesis

Deciphering the Probiotic Properties and Safety Assessment of a Novel Marine Multi-Stress-Tolerant Aromatic Yeast Pichia Kudriavzevii Hj2 Based on Whole Genome-Sequencing and Phenotype Analysis

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SSRN 2023年

作者： Li, Yanmei Mo, Xueyan Xiong, Jianwen Huang, Kunmei Zheng, Minglei Ou, Qian Su, Guijiao Jiang, Chengjian State Key Laboratory for Conservation and Utilization of Subtropical Agrobioresources Guangxi Research Center for Microbial and Enzyme Engineering Technology College of Life Science and Technology Guangxi University Nanning530004 China Guangxi Key Laboratory for Green Processing of Sugar Resources College of Biological and Chemical Engineering Guangxi University of Science and Technology Liuzhou545006 China Liuzhou Key Laboratory of Plant-derived Ingredients of Liuzhou Luosifen Liuzhou Special Food Flavor and Quality Control Research Center of Engineering Technology Department of Food and Chemical Engineering Liuzhou Institute of Technology Liuzhou545616 China

With the increasing demand for diversified health, the characteristic probiotics species resources need to be expanded. Here, a novel marine multi-stress-tolerant aromatic yeast Pichia kudriavzevii HJ2 was identified from marine mangrove. Based on the characterization of probiotic properties in vivo and in vitro, the yeast could assimilate multiple carbon sources, and generate volatile flavor metabolites, achieved a 79.98% cholesterol removal rate with efficient in vivo survival and adhesion capabilities, and showed a strong antioxidant capacity. HJ2 also released hydrolase and fermented dietary fiber to yield SCFAs, contributing to disease prevention and treatment. Then, the safety was assessed according to phenotype and whole genome-sequencing analysis. No virulence genes or ARGs were annotated in the HJ2 genome. A few biogenic amines (BA)-related genes were observed, but the production of various BA and total BA were far below the food-defined thresholds. HJ2 did not produce virulence enzymes such as DNase, phospholipase, gelatinase, or coagulase, and exhibited sensitivity to amphotericin B and anidulafungin without β-hemolysis. An in vivo acute toxicity test conducted on mice demonstrated that HJ2 is safe. In conclusion, HJ2 could be considered safe and be further used as a potential probiotic candidate for further clinical trials. © 2023, The Authors. All rights reserved.

关键词： Yeast

Highly Reversible Zn Metal Anodes Enabled by Multifunctional Poly(Zinc Acrylate) Protective Coating

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SSRN 2022年

作者： Wang, Jingwei Zhao, Zejia Hu, Fan Song, Hangqi Xie, Qirong Wan, Xuejuan Song, Shenhua Shenzhen Key Laboratory of Polymer Science and Technology Guangdong Research Center for Interfacial Engineering of Functional Materials College of Materials Science and Engineering Shenzhen University Shenzhen518060 China Institute of Semiconductor Manufacturing Research College of Mechatronics and Control Engineering Shenzhen University Guangdong Shenzhen518060 China Shenzhen University China

The application of low-cost and high-safety aqueous Zn metal batteries is seriously hindered by Zn anode stemming from its uncontrollable dendrite growth and detrimental water-induced side reactions. Herein, a zinc-enriched and negatively charged poly(zinc acrylate) (PZA) polyelectrolyte with hydrophobic 3D network is firstly constructed on Zn surface through facile UV light irradiation of ZA monomer. The as-obtained PZA coating exhibits a strong adhesion to Zn foil, persistently protecting Zn from water corrosion. Furthermore, the 3D interconnected network architecture favors the fast transport of Zn2+. Meanwhile, the anions can be shielded and desolvation of hydrated Zn2+ is accelerated. Notably, the self-contained Zn2+ in PZA can avoid the supply of sluggish ions. Accordingly, the Zn@PZA anode delivers a low energy barrier and high Zn2+ transference number. Moreover, it endows a superior Coulombic efficiency of 99.7% and long-life dendrite-free plating/stripping (10 mA cm-2, 2 mAh cm-2). The MnO2||Zn@PZA full cell displays a highly stable cycling behavior for over 700 cycles with a high capacity retention of 95.1% at 1 A g-1 together with a satisfactory rate performance. This work delivers an affordable and facile strategy to realize the high reversibility and stability of Zn anodes. © 2022, The Authors. All rights reserved.

关键词： Anodes

Unsupervised Time Series Anomaly Detection under Data Contamination

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Unsupervised Time Series Anomaly Detection under Data Contam...

IEEE International Symposium on Information (IT) in Medicine and Education, ITME

作者： Xiaohui Lin Zuoyong Li Xunhua Huang Xinwei Chen Haoyi Fan College of Computer and Data Science Fuzhou University Fuzhou China Fujian Provincial Key Laboratory of Information Processing and Intelligent Control College of Computer and Control Engineering Minjiang University Fuzhou China School of Computer Science and Technology Harbin University of Science and Technology Harbin China Fujian Engineering and Research Center of New Chinese Lacquer Materials Minjiang University Fuzhou China School of Computer and Artificial Intelligence Zhengzhou University Zhengzhou China

Unsupervised learning utilizes unlabeled data to alleviate the reliance on large amounts of labeled data, and it has made great progress in time series anomaly detection. However, there are still some thorny issues unsolved, especially the incapability to maintain the robustness of the model when the time series dataset is contaminated. In this work, we propose an unsupervised time series anomaly detection method on data contamination, named distribution alignment autoencoder (DAAE), in which a temporal sliding reward function combines the adversarial distribution alignment to mine the contaminated data. Specifically, the dimensionality reduction and reconstruction of the time series are implemented by an autoencoder. Next, using two discriminators, the latent features obtained by dimensionality reduction are mapped to the Gaussian distribution, and the high-confidence normal time series are generated by sampling noise from the Gaussian distribution. Then, we compute the mean square error between high-confidence normal samples and the training data. Finally, we feed the error values to the temporal sliding reward function to mine the contaminated training samples. Experimental results compared with baselines on public datasets demonstrate the effectiveness of DAAE.

关键词： Training Dimensionality reduction Time series analysis Training data Mean square error methods Gaussian distribution Robustness

A Five-Chamber Parallel Microbial Demineralized Fuel Cell for Removal of Microplastics from Mine Water: Effects, Performance, and Microbial Communities

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SSRN 2024年

作者： Shi, Lifeng He, Xi Liu, Yukuo Liu, Lin Liu, Xuejing Li, Fuping Wang, Hao Key Laboratory of Bioelectrochemical Water Pollution Control Technology in Tangshan City North China University of Science and Technology Tangshan China College of Civil and Architectural Engineering North China University of Science and Technology Tangshan China Hebei Mining Area Ecological Restoration Industry Technology Research Institute North China University of Science and Technology Tangshan China College of Mining Engineering North China University of Science and Technology Tangshan China

The mining industry produces a considerable quantity of mine water, which contains microplastics. This presents significant challenges to the discharge and reuse of mine water and intensifies environmental pollution. Given the superior performance of microbial demineralised fuel cells in removing high-salinity wastewater and persistent organic chemical pollutants, a new five-chamber parallel microbial demineralised fuel cell model was designed in this study. The simulated high-salinity mine water containing microplastics was used as the research object. The results indicate that the optimal reaction conditions are 15°C and pH 7. The Simpson diversity index of the system microbial community was high, the abundance of electric-producing bacteria was high, the average output voltage was 443 mV, and the electric production performance was superior. The desalting rate of the system is 83.78%, and the removal rate of microplastics is 51.96%, which demonstrates an excellent treatment effect on microplastics in mine water. © 2024, The Authors. All rights reserved.

关键词： Desalination

Rapid Fabrication of Electrodes for Symmetrical Solid Oxide Cells by Extreme Heat Treatment

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Energy & Environmental Materials 2024年第5期7卷 349-356页

作者： Weiwei Fan Zhu Sun Manxi Wang Manxian Li Yuming Chen Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing 210096China Department of Nuclear Science and Engineering Massachusetts Institute of TechnologyCambridgeMassachusetts 02139USA School of Materials Science and Engineering Shanghai Jiao Tong University800 Dongchuan RoadShanghai 200240China Zhangjiang Institute for Advanced Study(ZIAS) Shanghai Jiao Tong UniversityShanghai 201210China College of Environmental Science and Engineering and College of Physics and Energy Fujian Normal UniversityFuzhou 350000China

Symmetrical solid oxide cells(SSOCs)are very useful for energy generation and *** fabricate the electrode of SSOC,it is very time-consuming to use the conventional *** this work,we design and develop a novel method,extreme heat treatment(EHT),to rapidly fabricate electrodes for *** show that by using the EHT method,the electrode can be fabricated in seconds(the fastest method to date),benefiting from enhanced reaction *** EHT-fabricated electrode presents a porous structure and good adhesion with the *** contrast,tens of hours are needed to prepare the electrode by the conventional approach,and the prepared electrode exhibits a dense structure with a larger particle size due to the lengthy *** EHT-fabricated electrode shows desirable electrochemical ***,we show that the electrocatalytic activity of the perovskite electrode can be tuned by the vigorous approach of fast exsolution,deriving from the increased active sites for enhancing the electrochemical *** 900℃,a promising peak power density of 966 mW cm^(-2)is *** work exploits a new territory to fabricate and develop advanced electrodes for SSOCs in a rapid and high-throughput manner.

关键词： electrochemical performance extreme heat treatment perovskite electrode symmetrical solid oxide cells

Mechanistic Insight into the Enhanced No Reduction by Co Over a Pre-Reduced Cuxoy-Ceo2 Multiphase Catalyst

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SSRN 2023年

作者： Du, Ying Gao, Fengyu Tang, Xiaolong Yi, Honghong Zhou, Yuansong Zhao, Shunzheng Duan, Erhong Wang, Junyi Qi, Zhiyong Key Laboratory of Beijing Municipality for the Resource Treatment of Typical Industrial Pollutants School of Energy and Environmental Engineering University of Science & Technology Beijing Beijing100083 China China National Local Joint Engineering Research Center for Volatile Organic Compounds and Odor Pollution Control Hebei University of Science and Technology Hebei Shijiazhuang050018 China

The CuxOy(9)-CeO2(1) catalyst dominated by the low-valent Cu species was synthesized by a two-step method and employed for the NO+CO reaction. The CuxOy(9)-CeO2(1)-pre catalyst after CO pretreatment showed almost 100% NO conversion and also early 100% selectivity to N2 at 150°C in a reaction atmosphere with a CO to NO concentration ratio of 10, which were markedly superior to CuxOy(9)-CeO2(1)-no pre without CO pretreatment, Cu2O and CeO2 catalysts. The analysis results show there is a multi-electron cycling system including the transformation between Cu+ and Cu0, Cu+ and Cu2+ and the interaction between Cu+/Cu2+ and Ce+/Ce4+, which is conducive to improve the REDOX performance of the catalyst. In addition, CO pretreatment is beneficial to the production and stabilization of surface cooperative oxygen vacancy (SSOVs) in Cu--Ce system and then promote the activity. The in-situ DRIFTS analysis reveals that the NO+CO reaction follows the Mars van Krevelen (M-v-K) mechanism with Cu+ as the core species. During CO pretreatment, CO will react with the lattice oxygen on the catalyst surface to form the apparent SOVs (formed on a single metal atom) and SSOVs (mainly on a multi-metal catalyst) for continuous adsorption and reaction. NO can adsorb on oxygen vacancies and dissociate into [N] and [O] atoms, which interact with CO and eventually generated N2 and CO2, respectively, or fill oxygen vacancies to complete the catalytic cycle. In this process, the formation of SSOVs and the adsorption and dissociation of NO on oxygen vacancies play important roles. © 2023, The Authors. All rights reserved.

关键词： Oxygen vacancies

Nacl Treatment with Low Density Polyethylene Packaging Bags Can Enhance Aroma of Fresh-Cut Apple, Not Only Inhibit its Browning

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SSRN 2021年

作者： Ma, Su Ma, Jinling Wang, Qingguo Wang, Chao Shi, Hanzhang Shi, Jingying Key Laboratory of Food Processing Technology and Quality Control in Shandong Province College of Food Science and Engineering Shandong Agricultural University Tai’an271018 China Agricultural Service Center of Wenshang County Shandong Jining China College of Horticultural Science and Engineering Shandong Agricultural University Tai’an271018 China

NaCl is usually regarded as a low cost and effective anti-browning agent for fresh-cut apples, but is rare discussed on keeping flavor. In this study, the anti-browning effect of 0.1 mol/L NaCl with low density polyethylene (LDPE) packaging bags for apple was verified by lower browning degree, the total phenolic content, polyphenol oxidase (PPO), phenylalanine ammonia lyase (PAL) activity and relative expression. The higher flavor assessment score and significant difference of E-nose results showed that NaCl treatment increased the business value of fresh-cut apples. Some C4 and C6 ester aroma ingredients concentration had significantly difference. In all of them, butanoic acid methyl ester, butanoic acid 2-methyl-, methyl ester and hexanoic acid methyl ester were markedly higher in NaCl treated slices than the control. In addition, the linoleic acid content increased with NaCl treatment. Enzyme activities and relative genes expression in lipoxygenase (LOX) pathway including LOX, ethanol dehydrogenase (ADH), and alcohol-acyltransferase (AAT) were activated in apple slices with NaCl treatment. However, the activity and relative expression of pyruvate decarboxylase (PDC) related to ethanol synthesis were inhibited. In addition, NaCl enhanced β-glucosidase (BGL) activity of fresh-cut apples and its concentration in the reaction system was proportional to the BGL activity in the crude extract from apple. The results indicate NaCl treatment with LDPE packaging is an effective method to maintain appearance and flavor qualities of fresh-cut apples. © 2021, The Authors. All rights reserved.

关键词： Sodium chloride

Optimal Model and Dispatch Strategy of a Multi-Energy Microgrid Based on Hybrid Pumped Hydro-Battery Storage and Ground Source Heat Pump

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SSRN 2023年

作者： Li, Xinyue Wang, Honglei Li, Bin Tan, Zhukui Electrical Engineering College Guizhou University Guiyang550025 China Key Laboratory of "Internet+" Collaborative Intelligent Manufacturing in Guizhou Provence Guiyang Guizhou550025 China State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou310027 China Electric Power Research Institute Guizhou Power Grid Co. Ltd Guiyang550002 China

The carbon neutrality target and the carbon emission problem caused by the ever-increasing energy demand necessitate the extensive use of renewable energy (RES) generation technologies. Multi-energy microgrid (MEMG) become effective vehicles for managing RES generation and storage. However, the uncertainty of RES and the randomness of load demand poses a challenge to the design and operation of MEMG. This study proposes a MEMG including combined cooling, heating, power system, pumped hydro storage, and ground source heat pump to solve the problem. Combined with demand-side management strategies, a system is designed considering complementary configuration and energy conversion management. A corresponding optimization model is established to minimize the total cost and maximize the island operation while satisfying the demand. The experimental results show that the established model and scheduling method improves the system’s ability to cope with the RES’ uncertainty and reduces the capacity of the energy storage system. In summer, the daily investment cost is saved by 1439RMB, and the utilization rate of clean energy reaches 96%. Compared with the uncombined system, the MEMG reduces 1620.02kg of carbon dioxide per day, realizing the full utilization of clean energy and having the role of demonstration and promotion. © 2023, The Authors. All rights reserved.

关键词： Battery storage