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DOI码：10.1021/jacs.6b05958

发表刊物：J. Am. Chem. Soc.

关键字：IN-SALT ELECTROLYTE;LITHIUM BATTERIES;CYCLING STABILITY;ZINC BATTERIES;MANGANESE;OXIDE;OXYGEN;PERFORMANCE;MAGNESIUM;INSERTION

摘要：Rechargeable aqueous Zn-ion batteries are attractive cheap, safe and green energy storage technologies but are bottlenecked by limitation in high-capacity cathode and compatible electrolyte to achieve satisfactory cyclability. Here we report the application of nonstoichiometric ZnMn2O4/carbon composite as a new Zn-insertion cathode material in aqueous Zn(CF3SO3)2 electrolyte. In 3 M Zn(CF3SO3)2 solution that enables ∼100% Zn plating/stripping efficiency with long-term stability and suppresses Mn dissolution, the spinel/carbon hybrid exhibits a reversible capacity of 150 mAh g–1 and a capacity retention of 94% over 500 cycles at a high rate of 500 mA g–1. The remarkable electrode performance results from the facile charge transfer and Zn insertion in the structurally robust spinel featuring small particle size and abundant cation vacancies, as evidenced by combined electrochemical measurements, XRD, Raman, synchrotron X-ray absorption spectroscopy, FTIR, and NMR analysis. The results would enlighten and promote the use of cation-defective spinel compounds and trifluoromethanesulfonic electrolyte to develop high-performance rechargeable zinc batteries.

合写作者：Yongchang Liu, Qing Zhao, Kaixiang Lei, Chengcheng Chen, Xiaosong Liu, Jun Chen

第一作者：Ning Zhang

通讯作者：Fangyi Cheng

卷号：138

期号：39

页面范围：12894-12901

ISSN号：0002-7863

是否译文：否

发表时间：2016-09-14

发布期刊链接：https://pubs.acs.org/doi/10.1021/jacs.6b05958