Organic 2,5-dihydroxy-1,4-benzoquinone potassium salt with ultrahigh initial coulombic efficiency for potassium-ion batteries

Qijiu Deng; Congcong Tian; Zongbin Luo; Yangyang Zhou; Bo Gou; Haixuan Liu; Yingchun Ding; Rong Yang

doi:10.1039/d0cc05248e

Organic 2,5-dihydroxy-1,4-benzoquinone potassium salt with ultrahigh initial coulombic efficiency for potassium-ion batteries

Chem Commun (Camb). 2020 Oct 13;56(81):12234-12237. doi: 10.1039/d0cc05248e.

Authors

Qijiu Deng¹, Congcong Tian¹, Zongbin Luo¹, Yangyang Zhou¹, Bo Gou¹, Haixuan Liu¹, Yingchun Ding², Rong Yang³

Affiliations

¹ Department International Research Center for Composite and Intelligent Manufacturing Technology, School of material science and engineering, Institute of Chemical Power Sources, Xi'an University of Technology, Xi'an 710048, China. dengqijiu@xaut.edu.cn.
² Department International Research Center for Composite and Intelligent Manufacturing Technology, School of material science and engineering, Institute of Chemical Power Sources, Xi'an University of Technology, Xi'an 710048, China. dengqijiu@xaut.edu.cn and College of Optoelectronics Technology, Chengdu University of Information Technology, Chengdu 610225, China Xi'an 710048, China. dyccqzx@cuit.edu.cn.
³ School of science, Xi'an University of Technology, Xi'an 710048, China.

PMID: 32926020
DOI: 10.1039/d0cc05248e

Abstract

Here, we propose a new organic 2,5-dihydroxy-1,4-benzoquinone potassium salt (K2C6H2O4) endowing an ultrahigh initial coulombic efficiency of 96% as an advanced anode for potassium-ion batteries. Theoretical calculations and experimental results suggest that K+ can reversibly insert into this organic compound due to the flexible and stable structure of the K2C6H2O4 molecule as well as fast K+ kinetics in the selected dimethyl ether-based electrolyte.