Article
Chemistry, Physical
Jiayi Li, Yizhuo Zhang, Rong Shang, Chen Cheng, Yan Cheng, Jianxin Xing, Zhenzhen Wei, Yan Zhao
Summary: Advancements in separator technology for lithium-ion batteries have been developed to ensure safety, service life, and user experience. The focus is on incorporating thermal shutdown functions to prevent safety issues caused by elevated temperatures. Growing demand for recycling and sustainability has led to the development of functional separators with irreversible or reversible thermal shutdown ability for future utility and manufacture.
ENERGY STORAGE MATERIALS
(2021)
Article
Energy & Fuels
Cong-jie Wang, Yan-li Zhu, Fei Gao, Xin-ya Bu, Heng-shuai Chen, Ting Quan, Yi-bo Xu, Qing-jie Jiao
Summary: The safety evolution behavior of LiFePO4/graphite batteries with different states of health under overcharge is studied, showing that with increasing SOC, the cathode material gradually falls off and internal resistance increases. Before ISC, the degree of lithium intercalation in the anode increases and the heat release of the reaction increases, while both decrease after ISC.
Article
Energy & Fuels
Anci Chen, Weige Zhang, Caiping Zhang, Zhihao Wang, Xinyuan Fan
Summary: A novel on-board Al-Cu ISC detection method free from dependence on voltage sampling frequency is proposed, which extracts and converts signals to continuously indicate the occurrence of Al-Cu ISC.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Wenfei Zhang, Nawei Lyu, Yang Jin
Summary: In this paper, an algorithm based on loop current detection is proposed to detect internal short circuit of Li-ion batteries, enabling real-time sensing of internal short circuit in a multi-series 2-parallel battery module. The method only requires voltage detection at both ends of the diagnostic resistor, minimizing detection points and additional wiring. Experimental results show that the method is effective in timely detecting internal short circuits in parallel lithium-ion battery packs.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Nanoscience & Nanotechnology
Tingting Gao, Peng Tian, Qianjin Xu, Hongchang Pang, Junwei Ye, Guiling Ning
Summary: A study found that by adjusting hydrothermal temperatures, a class of boehmite particles with different grain sizes was synthesized and used to fabricate boehmite/polyacrylonitrile (BM/PAN) membranes. All of these BM/PAN membranes can maintain excellent thermal dimensional stability above 200 degrees C and have good electrolyte wettability and high porosity. Compared with Celgard 2325, lithium-ion batteries assembled with the best BM/PAN separator exhibit different thermal stability phenomena at 150 degrees C and have excellent rate performance and cycle stability at room temperature.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Environmental
Yukang Xiao, Ang Fu, Yue Zou, Lin Huang, Huiqun Wang, Yisong Su, Jianming Zheng
Summary: This study proposes a HDPE wax@boehmite/PE composite separator to improve the safety and cycling performance of LIBs by blocking lithium-ion transportation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Yao Li, Jin Long, Yun Liang, Jian Hu
Summary: A thermal shutdown separator with a tri-layer nonwoven structure has been developed in this study to improve the safety of lithium-ion batteries. The separator exhibits a thermal shutdown function at 135 degrees C, providing enhanced thermal stability and a wide temperature range for shutdown, thus enhancing battery safety.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Engineering, Environmental
Xiaopeng Tang, Jiajun Zhu, Xin Lai, Yuanqiang Zhou, Yuejiu Zheng, Furong Gao
Summary: Early-stage detection of battery internal short circuit is crucial for preventing fire accidents. This study proposes an equalization-based method for quantitatively calculating short circuit resistance, which shows high accuracy and performance in battery-in-the-loop experiments.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Jianhui Deng, Xiaoqing Yang, Guoqing Zhang
Summary: The internal short circuit of lithium ion batteries caused by lithium dendrites was simulated using finite element numerical simulation method in this paper. The results showed that heat production from short circuit in LIB is mainly contributed by the positive and negative electrodes, and increases with the radius and center distance of lithium dendrites. This study provides relevant theoretical basis for experimental research on growth of lithium dendrites, short circuit and heat production in LIBs, and contributes to the design of safer LIBs.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Xin Lai, Changyong Jin, Wei Yi, Xuebing Han, Xuning Feng, Yuejiu Zheng, Minggao Ouyang
Summary: This comprehensive review investigates the mechanism and evolutionary process of internal short circuit (ISC) within lithium-ion batteries (LIBs), covering types, inducing mechanisms, evolution stages, experimental methods, detection and diagnosis techniques, prevention methods, and future prospects. The study emphasizes the importance of improving safety in LIBs through advancements in modeling, simulation, detection, and prevention of ISC.
ENERGY STORAGE MATERIALS
(2021)
Article
Chemistry, Physical
Dongsheng Ren, Xuning Feng, Lishuo Liu, Hungjen Hsu, Languang Lu, Li Wang, Xiangming He, Minggao Ouyang
Summary: Thermal runaway, a critical issue in the application of lithium-ion batteries, is a thermalelectrical coupled process where exothermic chemical reactions and internal short circuit coincide. This study investigates the relationship between internal short circuit and thermal runaway under thermal abuse conditions, finding the limited contribution of internal short circuit to thermal runaway. The results provide new insights into battery thermal runaway mechanism and safety design.
ENERGY STORAGE MATERIALS
(2021)
Article
Electrochemistry
Ji-San Kim, Dong-Chan Lee, Jeong-Joo Lee, Chang-Wan Kim
Summary: This study introduces a framework for optimizing the energy density of lithium-ion batteries (LIBs) for electric vehicles while preventing separator failure, evaluating separator failure and performance using representative sandwich mechanical model and electrochemical model. The optimal solution was obtained using a metamodel and global optimization algorithm, improving energy density by 9.57% and ensuring the safety of the LIB pouch cell under crush load.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Engineering, Environmental
Tengfei Li, Jian Li, Chengxuan Lu, Lihua Wang, Jing Luo
Summary: Overcharge abuse is a common cause of thermal runaway in lithium ion batteries (LIBs). Existing overcharge protection strategies cannot permanently eliminate the safety hazards caused by overcharge abuse. A new overcharge protection mechanism based on an overcharge-triggered electrochemical nano-switch (OTENS) is proposed. OTENS has little negative effect on battery performance under normal and slight overcharge conditions, but will be activated under deep overcharge conditions to permanently shut down the overcharged cell and prevent further damage. This electrode design is simple and compatible with current industrial manufacturing processes.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Binghan Cui, Han Wang, Renlong Li, Lizhi Xiang, Jiannan Du, Huaian Zhao, Sai Li, Xinyue Zhao, Geping Yin, Xinqun Cheng, Yulin Ma, Hua Huo, Pengjian Zuo, Chunyu Du
Summary: Researchers developed an accurate and fast method for detecting the early internal short circuit (ISC) of Lithium-ion batteries by combining electrochemical impedance spectroscopy (EIS) with a deep neural network (DNN). The ISC detection accuracy reached 97.5% for the normal battery with zero false positives, and the proposed method was also proven to be applicable to other batteries. By selecting the most sensitive EIS spectrum to ISC based on the distribution of relaxation times and sensitivity methods, the required EIS measurement time was further reduced and computational efficiency was improved. The results demonstrate the value of EIS spectrum in battery management systems.
JOURNAL OF POWER SOURCES
(2023)
Article
Energy & Fuels
Mingbiao Chen, Wenji Song, Shili Lin, Fanfei Bai, Ziping Feng
Summary: This paper proposes an active protection method based on the evaluation of internal short circuit (ISC) risk. An evaluation model based on the electrochemical model is established and successfully verified with experimental data. The study finds that factors such as cycle number, charge rate, and battery temperature significantly affect the probability of ISC risk. With the active protection method, ISC risk can be predicted before it occurs.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Wenshuo Hu, Tommaso Selleri, Federica Gramigni, Endre Fenes, Kumar R. Rout, Shaojun Liu, Isabella Nova, De Chen, Xiang Gao, Enrico Tronconi
Summary: This study investigates the redox mechanism of Low-Temperature SCR on Cu-CHA using various techniques, proposing a Cu-II pair mediated pathway for the reduction half-cycle, challenging previous mechanistic proposals based on isolated Cu-II ions. The results highlight the important role of dinuclear Cu complexes in both oxidation and reduction reactions of Low-Temperature SCR.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Dong Lin, Quande Zhang, Zhengxing Qin, Qing Li, Xiang Feng, Zhaoning Song, Zhenping Cai, Yibin Liu, Xiaobo Chen, De Chen, Svetlana Mintova, Chaohe Yang
Summary: The green and efficient synthesis of titanium-containing molecular sieves is hindered by environmentally unfriendly additives and complicated procedures. A new additive-free route has been developed using hydroxyl free radicals generated from ultraviolet irradiation, successfully reversing the formation of titanium oligomers to match hydrolysis rates of titanium and silicon species. This approach shows fantastic catalytic performance for propene epoxidation with H-2 and O-2, opening up new opportunities for high-efficiency, environmentally friendly, and facile production of pure titanium-containing molecular sieves compared to conventional hydrothermal methods.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Engineering, Chemical
Wenzhao Fu, Qianhong Wang, Wenyao Chen, Gang Qian, Jing Zhang, De Chen, Weikang Yuan, Xinggui Zhou, Xuezhi Duan
Summary: In this study, the engineering of Ru atomic structures was demonstrated by fine-tuning Cl and Co coordination to synergize the quantity and quality of Ru active sites for boosting hydrogen generation. The results showed that removing Cl and leaching Co can significantly enhance the hydrogen generation activity of Ru catalysts.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Muhammad Zeeshan, Qing-Yu Chang, Jun Zhang, Ping Hu, Zhi-Jun Sui, Xing-Gui Zhou, De Chen, Yi-An Zhu
Summary: The catalytic properties of CeO2 catalyst for propane dehydrogenation were studied using density functional theory calculations, revealing a considerable Lewis acid-base interaction on the defective surfaces that enhances bond formation between adsorbates and the catalyst surface, resulting in increased surface reactivity.
CHINESE JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Physical
Xiaoli Yang, Jia Yang, Yalan Wang, Tao Zhao, Haoxi Ben, Xuning Li, Anders Holmen, Yanqiang Huang, De Chen
Summary: The Na and S-modulated FeMnOx catalysts play a crucial role in enhancing CO conversion, promoting olefin formation, and suppressing methane generation in Fischer-Tropsch synthesis of light olefins. Multiple characterizations and kinetic analysis confirmed that the promoters increase the formation of active species and lower CO activation energy. The study provides a practical strategy for developing highly active and stable FTO catalysts.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Energy & Fuels
Shuang Yao, Tong Zhang, Xiaoyu Tang, Delong Li, Weihao Zhang, Dong Lin, Ruiying Li, Hao Yan, Yibin Liu, Xiang Feng, Xiaobo Chen, Xin Zhou, Chaohe Yang
Summary: In this study, Co/hydroxyapatite (HAP) catalysts were synthesized by different methods and used for the catalytic transfer hydrogenation of methyl stearate to octadecanol using methanol and water as hydrogen donors. The strong interaction between Co and the HAP support enhanced electron transferability, resulting in high conversion and selectivity. The combined Co-0/Co delta+ active sites were found to synergistically boost H-2 generation and hydrogenation of methyl stearate in the methanol/water system, with potential implications for designing catalysts for efficient conversion of fatty acid methyl esters.
Article
Engineering, Chemical
Hongfei Ma, Jithin Gopakumar, Wei Zhang, Samuel K. Regli, Yalan Wang, Kumar R. Rout, Terje Fuglerud, Marco Piccinini, Magnus Ronning, De Chen
Summary: The study used UV-vis-NIR spectroscopy to investigate the dynamic changes of copper active sites in CuCl2/gamma-Al2O3-based catalyst during ethylene oxychlorination. Various Cu species such as CuCl2, CuCl, and Cu2OCl2 were identified for the first time, and their transient changes and contribution in the catalytic cycle were accurately imaged using MCR analysis, correlating with catalytic activity, selectivity, and stability. The time-resolved spectra and their correlation with catalytic performance provide better insights into the dynamic nature of active sites and their role in the reaction.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Jonas Van Belleghem, Jia Yang, Pieter Janssens, Jeroen Poissonnier, De Chen, Guy B. Marin, Joris W. Thybaut
Summary: An extended Single-Event MicroKinetic (SEMK) model successfully simulated Steady State Isotopic Transient Kinetic Analysis (SSITKA) data for Co catalyzed Fischer-Tropsch Synthesis (FTS), providing meaningful estimates for activation energies and atomic chemisorption enthalpies. The model analysis revealed the nature of two site types and the reaction preference for CO on step sites, as well as the role of terrace sites in methane production and alkane hydrogenation. The metal particle size effect was attributed to the increasing importance of terrace sites on reaction kinetics.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Chemistry, Physical
Jie Yang, Erlend Bjorgum, Hui Chang, Ka-Ke Zhu, Zhi-Jun Sui, Xing-Gui Zhou, Anders Holmen, Yi-An Zhu, De Chen
Summary: Research has shown that the dynamic nature of active sites on La-Fe-based perovskites in chemical looping methane oxidation is influenced by the Fe coordination environment (and hence the oxygen vacancy concentration), which is the key parameter governing the catalyst selectivity.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Thermodynamics
Xin Zhou, Shangfeng Li, Yuan Wang, Jiewenjing Zhang, Zhibo Zhang, Changgui Wu, Xiaobo Chen, Xiang Feng, Yibin Liu, Hui Zhao, Hao Yan, Chaohe Yang
Summary: The study introduced a novel hierarchical catalytic cracking process for crude oil, leading to increased conversion rate and olefin yields. Optimization of key operating parameters improved hydrogen and carbon atoms efficiency, net present value, and internal rate of return. Additionally, the novel process reduced greenhouse gas emissions, wastewater generation, and non-renewable energy consumption compared to conventional processes.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Materials Science, Multidisciplinary
Xiukuang Zhang, Jie Yin, Qian Lei, Xiangpeng Meng, Xiaobo Chen, Zhou Li
Summary: The study showed that high-throughput fabrication using directed energy deposition allowed for rapid production of gradient Cu-Fe-Cr alloys, with liquid diffusion and decomposition precipitation contributing to gradient variation in microstructure and composition, leading to increased hardness. Machine learning was successfully employed to predict alloy hardness, aiding in the acceleration of alloy design and fabrication.
Article
Optics
Xiao Yang, Xiaobo Chen, Juntong Xi
Summary: This work presents an efficient initial value estimation method for speckle control points matching using digital image correlation (DIC) based on perspective transformation. The proposed method achieves higher calibration accuracy compared to regular planar chessboard or circular marker array calibration targets, as well as higher measurement precision compared to the speckle pattern calibration method that uses SIFT-based initial value estimation.
Article
Chemistry, Analytical
Junhui Mei, Xiao Yang, Zhenxin Wang, Xiaobo Chen, Juntong Xi
Summary: This paper proposes a topology-based stereo matching method for 3D measurement using a single pattern of coded spot-array structured light. Experimental results demonstrate that the proposed technique can successfully decode each spot and establish stereo matching relation, achieving the goal of 3D reconstruction.
Article
Chemistry, Multidisciplinary
Haitao Zhou, Chongchen Yu, Hongquan Gao, Jian-Chun Wu, Dong Hou, Menghao Liu, Minghui Zhang, Zifu Xu, Jianhong Yang, De Chen
Summary: The study introduces a solid state separator made of lithiated polyphenylene sulfide and functionalized to improve Li+ transference, allowing lithium metal batteries to achieve higher energy and power densities under high loadings and voltages.
Article
Chemistry, Physical
Qing Lu, Chen Chen, Qian Di, Wanli Liu, Xiaohui Sun, Yongxiao Tuo, Yan Zhou, Yuan Pan, Xiang Feng, Lina Li, De Chen, Jun Zhang
Summary: Efficient and stable electrocatalysts are crucial for the electrocatalytic CO2 reduction reaction (CO2RR) into chemical products. In this study, a NC@Ni/C nano-composite with a core-shell structure was developed as an effective electrocatalyst for CO2RR to CO over a wide potential range. The catalyst exhibited high CO Faradaic efficiency and excellent stability, primarily attributed to the pyridinic-N doping in the carbon shell of Ni NPs.
