Performance of Na0.44Mn1−xMxO2 (M = Ni, Mg; 0 ≤ x ≤ 0.44) as a cathode for rechargeable sodium ion batteries

Yu Shao, Yu Ting Zhou, Miao Miao Deng, Zhong Feng Tang, Jia Ying Liao, Henny J.M. Bouwmeester, Chun Hua Chen*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

The influence of partial substitution of manganese by nickel or magnesium in Na0.44MnO2on cathode performance in sodium ion batteries has been investigated. Partial substitution changes the structure of parent Na0.44MnO2 from tunnel into layered P2-type, or a mixture of P2- and P3-type materials. Substitution smoothes the charge/discharge curves and may significantly improve capacity, albeit with a lower capacity retention relative to pristine Na0.44MnO2. In particular, high discharge capacities are found in the voltage range 2.0–4.2 V at 0.1 C rate for Na0.44Mn0.89Ni0.11O2 (193 mAh g−1) and Na0.44Mn0.89Mg0.11O2 (188 mAh g−1), with a capacity retention of 74% and 81%, respectively, after 70 cycles.

Original languageEnglish
Pages (from-to)2979-2988
Number of pages10
JournalJournal of solid state electrochemistry
Volume23
Issue number10
Early online date15 Sep 2019
DOIs
Publication statusPublished - 1 Oct 2019

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Keywords

  • Cathode
  • NaMnO
  • Sodium ion battery
  • Substitution

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