Annealing Treatment: A Facile Approach to Enhance Transfer Kinetics for a LiFePO4/C Cathode,Chemical Engineering & Technology

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Annealing Treatment: A Facile Approach to Enhance Transfer Kinetics for a LiFePO4/C Cathode
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2022-08-04 , DOI: 10.1002/ceat.202200191
Maoping Yang ₁ , Xueying Jia ₁ , Pengfei Li ₁ , Jie Yao ₁ , Weiwei Wang ₁

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Nowadays, solid phase synthesis has been proven to be the most cost-effective and convenient approach to mass preparation of a LiFePO₄/C cathode. Nevertheless, the LiFePO₄/C cathode usually shows unsatisfactory electrochemical performance due to its high proportion of antisite defects and inefficient carbon coating. In this work, a post-synthesis annealing treatment method is used to improve the ionic and electron transfer kinetics of high-temperature solid phase synthesized LiFePO₄/C. Owing to the annealing treatment, the proportion of Fe-Li antisite defects in the LiFePO₄ crystal can be significantly reduced. The graphitization degree of carbon coating on LiFePO₄ has been increased. This contributes to the enhancement of rapid transfer kinetics and suppressed polarization of the electrode.

中文翻译：

退火处理：一种提高 LiFePO4/C 阴极转移动力学的简便方法

如今，固相合成已被证明是大规模制备 LiFePO ₄ /C 正极的最具成本效益和最方便的方法。然而，由于其高比例的反位缺陷和低效的碳涂层，LiFePO _{4 /C 正极通常表现出不令人满意的电化学性能。}在这项工作中，采用合成后退火处理方法来改善高温固相合成的LiFePO ₄ /C 的离子和电子转移动力学。由于退火处理，LiFePO ₄晶体中Fe-Li反位缺陷的比例可以显着降低。_{LiFePO 4}碳涂层的石墨化程度已增加。这有助于增强快速转移动力学并抑制电极的极化。

更新日期：2022-08-04

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