Critical assessment of particle quality of commercial LiFePO4 cathode material using coin cells—a causal table for lithium-ion battery performance

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• 作者：Guoqiang Cai ; Ka Y. Fung ; Ka M. Ng ; Ka L. Chu…
• 关键词：Li ; ion battery ; Cathode material ; LiFePO4 ; Particle size ; Morphology ; Causal table
• 刊名：Journal of Solid State Electrochemistry
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：20
• 期：2
• 页码：379-387
• 全文大小：1,185 KB
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• 作者单位：Guoqiang Cai (1)
  Ka Y. Fung (1)
  Ka M. Ng (1)
  Ka L. Chu (2)
  Kawai Hui (2)
  Lixing Xue (2)
  
  1. Department of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
  2. CN Innovations Limited, 1 Lockhart Road, Wan Chai, Hong Kong
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Physical Chemistry
  Analytical Chemistry
  Industrial Chemistry and Chemical Engineering
  Characterization and Evaluation Materials
  Condensed Matter
  Electronic and Computer Engineering
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1433-0768

文摘

LiFePO₄ (LFP) is widely used as a cathode material for lithium-ion batteries (LIBs). While there exist many studies of the effect of particle size, purity, morphology, degree of agglomeration, and carbon coating on battery performance, it is not clear how these parameters are optimized in a commercial product. This paper aims at developing a causal table which relates the particle qualities to battery performance. A critical assessment of six commercial LFP products was performed in terms of material characteristics and the electrochemical performance of the corresponding button cells. One of the LFP samples with plate-like morphology, small particle size (0.15 × 0.4 × 0.6 μm), and around 2.5 wt% carbon coating had the highest specific capacity (164.9 mAh g−1 at 0.1 C) and rate capability (88.5 % at 1.5 C). The results are in general agreement with the relations captured in the causal table, verifying that it can be used to guide product development. Keywords Li-ion battery Cathode material LiFePO₄ Particle size Morphology Causal table