Have you heard of the three electrode system? It might be completely different from the batteries we use in our daily lives, which typically have two electrodes: a positive and a negative one. So, why is there a three electrode…
1. Background As we all know, lithium-ion batteries will experience structural swelling and contraction during de-lithium extraction For anode electrode materials, whether it is intercalated lithium intercalation of graphite or alloyed lithium intercalation of silicon-based anode electrodes, the common feature…
1. Preface Silicon anode materials, with its unique advantages of high theoretical capacity (4200mAh/g) and abundant resources, is expected to replace widely used graphite negative electrodes and become the main negative electrode material for the next generation of lithium-ion batteries.…
1. Author Information and Article Summary In 2022, Dr. Peipei Xu of Beijing University of Science and Technology developed a method to estimate the LiFePO4 SOC based on the expansion force curve of the LiFePO4 batteries. Through experimental verification, it…
1. Author Information and Article Abstract In 2017, the J.R.Dahn research group used the in-situ characterization method to test the volume, stress and thickness changes of the electrodes for pouch cells with different silicon-composite negative electrodes, combined with the calculation…
1. Background This paper uses the cell pressure distribution system (BPD1000) to monitor the pressure distribution of different positions of the cell, so as to quickly quantify and evaluate the flatness of different cell sizes. In the existing process, the…
1. Author information and article abstract 2022, Yonghong Deng’s group at SUSTech, in collaboration with Prof. Zijian Zheng’s team at the Hong Kong Polytechnic University (first author: Chao Luo, a PhD student at SUSTech), developed a roll-to-roll approach to prepare…
1. Preface Lithium-ion battery is an electric-heat-force coupling system, which has swelling problems in the actual use process. On the one hand, the SEI film is formed, and the air pressure inside the battery increases, and the thickness of the SEI…
1. Introduction Gas generation is an unavoidable phenomenon during the battery manufacturing process and its usage, occurring in various stages such as formation, cycling, overcharging, over-discharging, and storage. Different working conditions require different levels of gas generation and different gas…
In this paper, the in-situ swelling analyzer (SWE) is used to test the swelling force and the temperature change of the LiFePO4 prismatic cells under different initial preload (60kg/90 kg/120 kg) and different charge and discharge rates of the LiFePO4…
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