Issue 8, 2021
From the journal:

Chemical Communications

A highly concentrated electrolyte for high-efficiency potassium metal batteries†

Wenxin Xu,‡a   Huwei Wang, ORCID logo ‡b   Junyang Hu,a   Haodong Zhang,b   Biao Zhang, ORCID logo c   Feiyu Kang*abd  and  Dengyun Zhai ORCID logo *a  

* Corresponding authors

a Advanced Materials Institute, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
E-mail: zhaidy0404@sz.tsinghua.edu.cn

b Shenzhen Environmental Science and New Energy Technology Engineering Laboratory, Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen 518055, China
E-mail: fykang@mail.tsinghua.edu.cn

c Department of Applied Physics, The Hong Kong Polytechnic University Kowloon, Hong Kong, China

d Shenzhen Key Laboratory for Graphene-Based Materials and Engineering Laboratory for Functionalized Carbon Materials, Shenzhen Geim Graphene Center, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China

Abstract

We report a highly concentrated electrolyte consisting of 4 M potassium bis(fluorosulfonyl)imide (KFSI) in diethylene glycol dimethyl ether (DEGDME). This new electrolyte enables stable cycling of K metal anodes with a high CE (over 98% over 400 cycles), and excellent capacity retention (99.7% after 500 cycles) of K||potassium Prussian blue (KPB) batteries.

Graphical abstract: A highly concentrated electrolyte for high-efficiency potassium metal batteries

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Article information

DOI
https://doi.org/10.1039/D0CC07266D
Article type
Communication
Submitted
04 Nov 2020
Accepted
17 Dec 2020
First published
18 Dec 2020

Chem. Commun., 2021,57, 1034-1037

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A highly concentrated electrolyte for high-efficiency potassium metal batteries

W. Xu, H. Wang, J. Hu, H. Zhang, B. Zhang, F. Kang and D. Zhai, Chem. Commun., 2021, 57, 1034 DOI: 10.1039/D0CC07266D

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