A green water-induced spinel heterostructure interface enabling high performance lithium and manganese rich oxides

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Wenqiang Tu
  • Xianshu Wang
  • Wenying Tian
  • Yunan Zhou
  • Cuiping Han
  • Feiyu Kang
  • Baohua Li

Detail(s)

Original languageEnglish
Pages (from-to)20576-20584
Journal / PublicationJournal of Materials Chemistry A
Volume9
Issue number36
Online published23 Aug 2021
Publication statusPublished - 28 Sep 2021

Abstract

Lithium and manganese rich oxides (LMROs) are promising candidates for next-generation high-energy lithium-ion batteries. However, intrinsic problems associated with low initial coulombic efficiency and inferior rate capability impede the commercial application of LMROs. A conformal and uniform surface coating on LMROs can effectively suppress these drawbacks. In this work, we propose a mild and green method to introduce a spinel heterostructure layer on the surface of LMROs via a simple Li+/Hion exchange reaction in pure H2O. The transformed spinel heterostructure layer is intimately integrated with the bulk core and displays better structural stability and high diffusion dynamic kinetics for Li+, which contributes to sustaining superior electrochemical performances. The modified LMRO delivers a high initial coulombic efficiency of 87.1%, specific capacity of 150 mA h g−1 at 1.6 A g−1 and 89% capacity retention after 200 cycles at 0.5C, while they are 78.5%, 127 mA h g−1 and 79% for the original LMRO. The method is controllable, cost-effective, and environmentally friendly, and has great potential for commercial application. This work also proposes a new viewpoint for uncovering the mechanism of introducing spinel components into LMROs through a hydrothermal process.

Citation Format(s)

A green water-induced spinel heterostructure interface enabling high performance lithium and manganese rich oxides. / Tu, Wenqiang; Wang, Xianshu; Tian, Wenying; Zhou, Yunan; Han, Cuiping; Li, Chuan; Kang, Feiyu; Li, Baohua.

In: Journal of Materials Chemistry A, Vol. 9, No. 36, 28.09.2021, p. 20576-20584.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review