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A Novel Two-Dimensional Whorled Tib4 as a High-Performance Anode Material For Li-Ion and Na-Ion Batteries

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SSRN 2023年

作者： Ma, Shihao Zhang, Hui Cheng, Zishuang Xie, Xinjian Zhang, Xiaoming Liu, Guodong Chen, Guifeng State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology Tianjin300130 China School of Materials Science and Engineering Hebei University of Technology Tianjin300130 China Hebei Engineering Laboratory of Photoelectronic Functional Crystals Hebei University of Technology Tianjin300130 China

The search for high storage capacity anode materials has been an important topic in the field of ion batteries. With the gradual development of two-dimensional (2D) materials, their potential as high-performance electrode materials have been demonstrated. Here, using first principles calculations, we investigate the feasibility of novel 2D TiB4 as an ideal anode material for Li/Na ion batteries. Our results indicate that Li/Na ions can be chemically and stably adsorbed on the surface of 2D TiB4. It is noteworthy that the Li capacity of 2D TiB4 is up to 2353.2 mA h g-1 and the Na capacity up to 1765.9 mA h g-1 with a guaranteed low diffusion barrier (0.24 eV for Li;0.09 eV for Na). Therefore, our calculations show that TiB4 monolayer is an excellent anode material with great potential for ultra-high energy storage devices. © 2023, The Authors. All rights reserved.

关键词： Anodes

Two Dimensional Alb4 as High-Performance Anode Material for Li/Na Batteries

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SSRN 2023年

The development of anode materials for ultra-high energy storage is an important topic for high-performance Li/Na ion batteries (LIBs/NIBs). Here, we propose AlB4 monolayer as a novel anode material for LIBs/NIBs by first principles calculations. The AlB4 monolayer has excellent kinetic and thermodynamic stability. Most importantly, the AlB4 monolayer is very promising for synthesis and we provide a synthetic idea. Both sides of the monolayer can be lithiated/sodified to give AlB4Li8 and AlB4Na4 with storage capacities of 3053.3 mA h g-1 and 1526.6 mA h g-1, respectively. In addition, AlB4 monolayer has low values of open-circuit voltage and diffusion barrier, which is required for anode materials. These calculations show that AlB4 monolayer is one of the very few excellent ultra-high energy storage LIBs/NIBs anode materials found to date. © 2023, The Authors. All rights reserved.

关键词： Monolayers

Enhanced Piezoelectric and Pyroelectric Response in P(Vdf-Trfe) Based Sensor Via X-Ray Irradiation

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SSRN 2023年

作者： Yang, Bin Zhang, Hong Wang, Qianjin Li, Bo Liu, Weishu College of Physics and Electronic Information Yunnan Normal University Yunnan Kunming650500 China Department of Materials Science and Engineering Southern University of Science and Technology Guangdong Shenzhen518055 China The Science and Technology on Reliability Physics and Application of Electronic Component Laboratory China Electronic Product Reliability and Environmental Testing Research Institute Guangzhou510610 China

Given the inherent limitations of sensing technologies, this study aimed to investigate the transformative effect of high-energy X-rays on the enhancement of piezoelectric and pyroelectric properties of poly(vinylidene fluoride-co-trifluoroethylene) (P(VDF-TrFE), 70/30%) films. Our investigation showed a remarkable improvement in the pyroelectric and piezoelectric responses in the P(VDF-TrFE) films after irradiation. When irradiated with 1 Mrad X-rays, the P(VDF-TrFE) films exhibit a pyroelectric coefficient of 252 μC m-2 K-1, which is three times higher than that of non-irradiated films, and the piezoelectric coefficient increased to 33 pC N-1. The sensitivity to temperature changes was measured to be 15.66 V K-1 from 0.05 K to 5 K, respectively. In addition, the pressure sensitivity in the range from 0.025 to 10 kPa and 10 to 50 kPa were determined to be 3.62 V kPa-1 and 0.63 V kPa-1. This considerable increase in performance is primarily due to a significant improvement in crystallinity, which increased from 45% to 80%. Consequently, our results strongly suggest that the application of X-rays to P(VDF-TrFE) films is a reliable and effective method to improve both pyroelectric and piezoelectric responses. © 2023, The Authors. All rights reserved.

关键词： Irradiation

Unlocking the potential of unlabeled data:Self-supervised machine learning for battery aging diagnosis with real-world field data

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Journal of Energy Chemistry 2024年第12期99卷 681-691页

作者： Qiao Wang Min Ye Sehriban Celik Zhongwei Deng Bin Li Dirk Uwe Sauer Weihan Li National Engineering Research Center for Highway Maintenance Equipment Chang'an UniversityXi'an 710064ShanxiChina Key Laboratory of Road Construction Technology and Equipment of MOE Chang'an UniversityXi'an 710064ShanxiChina School of Automobile Chang'an UniversityXi'an 710064ShanxiChina Chair for Electrochemical Energy Conversion and Storage Systems Institute for Power Electronics and Electrical Drives(ISEA)RWTH Aachen University52074 AachenGermany Center for Ageing Reliability and Lifetime Prediction of Electrochemical and Power Electronics Systems(CARL)RWTH Aachen University52074 AachenGermany Jülich Aachen Research Alliance JARA-Energy52074 AachenGermany Helholtz Institute Münster(HI MS) Forschungszentrum Jülich52425 JülichGermany School of Mechanical and Electrical Engineering University of Electronic Science and Technology of ChinaChengdu 611731SichuanChina

Accurate aging diagnosis is crucial for the health and safety management of lithium-ion batteries in electric *** significant advancements achieved by data-driven methods,diagnosis accuracy remains constrained by the high costs of check-up tests and the scarcity of labeled *** paper presents a framework utilizing self-supervised machine learning to harness the potential of unlabeled data for diagnosing battery aging in electric vehicles during field *** validate our method using battery degradation datasets collected over more than two years from twenty real-world electric *** analysis comprehensively addresses cell inconsistencies,physical interpretations,and charging uncertainties in real-world *** is achieved through self-supervised feature extraction using random short charging sequences in the main peak of incremental capacity *** leveraging inexpensive unlabeled data in a self-supervised approach,our method demonstrates improvements in average root mean square errors of 74.54%and 60.50%in the best and worst cases,respectively,compared to the supervised *** work underscores the potential of employing low-cost unlabeled data with self-supervised machine learning for effective battery health and safety management in realworld scenarios.

关键词： Lithium-ion battery Aging diagnosis Self-supervised Machine learning Unlabeled data

Optimal Sizing and Operation of Hydrogen Generation Sites Accounting for Waste Heat Recovery

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SSRN 2024年

作者： Vandenberghe, Roxanne Humbert, Gabriele Cai, Hanmin Koirala, Binod Prasad Sansavini, Giovanni Heer, Philipp Urban Energy Systems Laboratory Empa - Swiss Federal Laboratories for Materials Science and Technology Dübendorf8600 Switzerland Institute of Energy and Process Engineering Reliability and Risk Engineering ETH Zurich Zurich8092 Switzerland University of Birmingham United Kingdom

The attainment of cost-effective hydrogen production is key to facilitating the use ofhydrogen as an alternative to fossil fuels. This study adopts a mixed integer linearprogramming approach to simultaneously derive the optimal sizing and operation ofhydrogen generation sites. Waste heat recovery solutions to serve a district heatingnetwork were considered, resulting in an 18.9 % reduction in hydrogen production costscompared to conventional designs, with up to 5.3 % of the reduction attributable towaste heat utilization. A global sensitivity analysis indicated the renewable availability,the cost of imported electricity, and the electrolyser conversion efficiency as the most influentialparameters in reducing total costs. Additionally, the study explores the impactof modeling fidelity on optimization results, revealing that nominal efficiency assumptionscommonly used in the literature can lead to sizing errors and cost *** piecewise linear approximations for electrolyzer performance significantlyenhances the accuracy of these predictions. Overall, the findings underscore the crucialinterconnection between the optimal sizing and operation of hydrogen generation sites,emphasizing that these should not be treated as separate steps in the design *** work provides a robust foundation for advancing the optimal design of hydrogengeneration sites and offers practical recommendations to reduce hydrogen costs. © 2024, The Authors. All rights reserved.

关键词： Hydrogen production

Recent advances in electrospun electrode materials for sodium-ion batteries

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Journal of Energy Chemistry 2021年第3期30卷 225-241页

作者： Yao Wang Yukun Liu Yongchang Liu Qiuyu Shen Chengcheng Chen Fangyuan Qiu Ping Li Lifang Jiao Xuanhui Qu Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin 300071China China Electronic Product Reliability and Environmental Testing Research Institute(CEPREI) Guangzhou 510610GuangdongChina

Sodium-ion batteries(SIBs)have been considered as an ideal choice for the next generation large-scale energy storage applications owing to the rich sodium resources and the analogous working principle to that of lithium-ion batteries(LIBs).Nevertheless,the larger size and heavier mass of Na^(+)ion than those of Li^(+)ion often lead to sluggish reaction kinetics and inferior cycling life in SIBs compared to the LIB *** pursuit of promising electrode materials that can accommodate the rapid and stable Na-ion insertion/extraction is the key to promoting the development of SIBs toward a commercial ***-dimensional(1 D)nanomaterials demonstrate great prospects in boosting the rate and cycling performances because of their large active surface areas,high endurance for deformation stress,short ions diffusion channels,and oriented electrons transfer ***,as a versatile synthetic technology,features the advantages of controllable preparation,easy operation,and mass production,has been widely applied to fabricate the 1 D nanostructured electrode materials for *** this review,we comprehensively summarize the recent advances in the sodium-storage cathode and anode materials prepared by electrospinning,discuss the effects of modulating the spinning parameters on the materials’micro/nano-structures,and elucidate the structure-performance correlations of the tailored ***,the future directions to harvest more breakthroughs in electrospun Na-storage materials are pointed out.

关键词： Sodium-ion batteries Electrospinning Electrode materials Nanostructures Structure-performance correlations

Multi Scale Heterostructure Induces High Strength-Ductility Synergy in (Cocrni)94al3ti3/18nic350 Maraging Multilayer Materials

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SSRN 2024年

作者： Wang, Jiao Yu, Wenxing Liu, Baoxi Ding, Jiale Ming, Kaisheng Zheng, Shijian Yin, Fuxing Hu, Ning Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology School of Materials Science and Engineering Hebei University of Technology Tianjin300130 China State Key Laboratory of Reliability and Intelligence Electrical Equipment Hebei University of Technology School of Mechanical Engineering Hebei University of Technology Tianjin300401 China Institute of New Materials Guangdong Academy of Sciences Guangzhou510651 China

Strength and ductility are two key property indicators for the structural material applications, but there has always been a trade-off relationship. Here, the (CoCrNi)94Al3Ti3/18NiC350 maraging multilayer with multi scale heterostructures are successfully fabricated by hot rolling and step ageing treatment to achieve an excellent strength-ductility combination. Compared to other ageing treatments, the multilayer with step ageing (825℃/2 h+515℃/5 h) has the highest mechanical properties with tensile strength of 1800 MPa and fracture elongation of 15.2%. The multi scale heterostructure integrates the multilayer interfaces with grain gradient, high density η-Ni3Ti nanoprecipitates and dislocations generated in the 18NiC350 maraging layer, as well as high-density L12-Ni3Al nanoprecipitates and various crystal defects (such as stacking faults, Lomer-Cottrell locks, dislocations, and deformation twinning) formed in (CoCrNi)94Al3Ti3 layer. This multi scale heterostructure can cause excellent strain hardening behavior and various strengthening mechanisms. The increment of the yield strength was mainly from hetero-deformation induced stress strengthening, grain boundary strengthening and precipitation strengthening mechanism. This study provides experimental basis and theoretical support for the strengthening and toughening of metal composite materials. © 2024, The Authors. All rights reserved.

关键词： Strain hardening

Bayesian Inference of Mechanical Property Parameters and Layup Orientation Angle in a Composite Wing

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Bayesian Inference of Mechanical Property Parameters and Lay...

Complex Systems and Intelligent science (CSIS-IAC), International Annual Conference on

作者： Yulian Gong Yuhua Tang Jianguo Zhang School of Reliability and Systems Engineering Beihang University Beijing China Deep Space Exploration Laboratory State Administration of Science Technology and Industry for National Defence PRC Beijing China

A Bayesian method is adopted to infer the mechanical property parameters and layup orientation angle of a composite wing in this paper. In order to make the calculation feasible, a basis-adaptive PC-Kriging model is proposed, which can replace the finite element model of the composite wing accurately. Considering that the simulation model of the composite wing is a high-dimensional model, AIES algorithm is used to model calibration of the composite wing, because it shows good performance in processing high-dimensional strongly correlated posterior distribution parameters. Finally, comparing the predicted parameters with the real parameters, the error is found to be small, which indicates that the proposed Bayesian method has good performance.

关键词：

Chance-Constrained Multiple-Choice Knapsack Problem: Model, Algorithms, and Applications

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arXiv

arXiv 2023年

作者： Li, Xuanfeng Liu, Shengcai Wang, Jin Chen, Xiao Ong, Yew-Soon Tang, Ke The Guangdong Provincial Key Laboratory of Brain-Inspired Intelligent Computation Department of Computer Science and Engineering Southern University of Science and Technology Shenzhen518055 China Singapore Huawei Reliability Lab China Singapore Singapore

The multiple-choice knapsack problem (MCKP) is a classic NP-hard combinatorial optimization problem. Motivated by several significant real-world applications, this work investigates a novel variant of MCKP called chance-constrained multiple-choice knapsack problem (CCMCKP), where the item weights are random variables. In particular, we focus on the practical scenario of CCMCKP, where the probability distributions of random weights are unknown but only sample data is available. We first present the problem formulation of CCMCKP and then establish two benchmark sets. The first set contains synthetic instances and the second set is devised to simulate a real-world application scenario of a certain telecommunication company. To solve CCMCKP, we propose a data-driven adaptive local search (DDALS) algorithm. The main novelty of DDALS lies in its data-driven solution evaluation approach that can effectively handle unknown probability distributions of item weights. Moreover, in cases with unknown distributions, high intensity of chance constraints, limited amount of sample data and large-scale problems, it still exhibits good performance. Experimental results demonstrate the superiority of DDALS over other baselines on the two benchmarks. Additionally, ablation studies confirm the effectiveness of each component of the algorithm. Finally, DDALS can serve as the baseline for future research, and the benchmark sets are open-sourced to further promote research on this challenging problem. Copyright © 2023, The Authors. All rights reserved.

关键词： Combinatorial optimization