Affiliation:
1. School of Physics and Electronics Hunan University Changsha 410082 P. R. China
2. School of Materials Science and Engineering Central South University Changsha 410083 P. R. China
3. Department of Physics and Astronomy Clemson Nanomaterials Institute Clemson University Clemson SC 29634 USA
Abstract
The solid electrolyte interface (SEI) is vital to the stability of alkali metal‐ion battery anodes. However, conventional SEIs that lack elasticity will be damaged during the anode's repeated volume expansion, such as in potassium‐ion battery anodes, ultimately resulting in cell failure. Herein, a low‐content additive (pigment green 7, 0.07 wt%) in a conventional carbonate electrolyte to create a reticular elastic SEI with excellent uniformity and good chemical stability is employed. As a result, long‐lasting K||K symmetric cell (over 1400 h), enhanced graphite anode (500 cycles with 97.9% capacity retention), and stabilized perylene‐3,4:9,10‐tetracarboxydiimide cathode (1200 cycles with 82.8% capacity retention) are achieved. Furthermore, the matched graphite||perylene‐3,4:9,10‐tetracarboxydiimide full cell operates stably for more than 200 cycles. This work provides a novel avenue into the rational design of elastic SEIs for advanced anodes.
Funder
National Natural Science Foundation of China
Subject
General Earth and Planetary Sciences,General Environmental Science
Cited by
4 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献