Graphite Anode for Potassium Ion Battery with Unprecedented Performance.

By Ling Fan, Ruifang Ma, Qingfeng Zhang, Xinxin Jia, Bingan Lu. Angewandte Chemie, 2019

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Graphite anode as anode for potassium ion battery (PIBs) possesses the merits of low cost and potentially high energy density, while suffers from limited cycle time and inferior stability. Here we, using concentrated electrolyte design, demonstrated that formation of a robust inorganic-rich passivation layer on the graphite anode could resolve these dilemmas. Consequently, the PIBs with graphite anode could operate for over 2000 cycles (running time of over 17 months) with negligible capacity decay, and could exhibit high area capacity over 7.36 mAh cm-2 with a high mass loading of 28.56 mg cm-2. These unprecedented performances of graphite are comparable to that of traditional lithium ion batteries, and may promote the rapidly development of high performance PIBs.

Subfields: Automotive Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/95b2c91e1cb55f0afa9c7cc61d215447e03ce4d0