Enhanced electrochemical performance of Li2.72Na0.31MnPO4CO3 as a cathode material in “water-in-salt” electrolytes

Baowei Xie; Ryo Sakamoto; Ayuko Kitajou; Liwei Zhao; Kosuke Nakamoto; Shigeto Okada; Ken Albrecht; Wataru Kobayashi; Masaki Okada; Toshiya Takahara

doi:10.1039/D1CC04350A

Enhanced electrochemical performance of Li_2.72Na_0.31MnPO₄CO₃ as a cathode material in “water-in-salt” electrolytes†

Baowei Xie,^a Ryo Sakamoto,

^a Ayuko Kitajou,

^b Liwei Zhao,^c Kosuke Nakamoto,

*^c Shigeto Okada,*^c Ken Albrecht,

^cd Wataru Kobayashi,^e Masaki Okada^e and Toshiya Takahara^e

Author affiliations

* Corresponding authors

^a Interdisciplinary Graduate School of Engineering Science, Kyushu University, 6-1, Kasuga Koen, Kasuga 816-8580, Japan

^b Graduate School of Sciences and Technology for Innovation, 2-16-1 Tokiwadai, Ube 755-8611, Japan

^c Institute of Materials Chemistry and Engineering, Kyushu University, 6-1, Kasuga Koen, Kasuga 816-8580, Japan
E-mail: nakamoto@cm.kyushu-u.ac.jp

^d JST-PRESTO, Honcho 4-1-8, Kawaguchi, Saitama 332-0012, Japan

^e Tosoh Corporation, 3-8-2, Shiba, Minato-Ku, Tokyo 105-8623, Japan

Abstract

A carbonophosphate compound of Li_2.72Na_0.31MnPO₄CO₃ was synthesized via ion exchange. The initial discharge capacity of Li_2.72Na_0.31MnPO₄CO₃ in 15 molal (or 15 m) LiTFSI was 110 mA h g⁻¹ at 2 mA cm⁻² (∼0.5C). Due to the decomposition of Li_2.72Na_0.31MnPO₄CO₃, the capacity retention degraded to 64% after 100 cycles.

Chemical Communications

Enhanced electrochemical performance of Li_2.72Na_0.31MnPO₄CO₃ as a cathode material in “water-in-salt” electrolytes†

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Enhanced electrochemical performance of Li_2.72Na_0.31MnPO₄CO₃ as a cathode material in “water-in-salt” electrolytes

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