Multi-shelled LiMn1.95Co0.05O4 cages with a tunable Mn oxidation state for ultra-high lithium storage

Li Lu, Yanjie Hu, Hao Jiang, Yang Wang, Yi Jiang, Su Huang, Xiaofeng Niu, Pratim Biswas, Chunzhong Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)

Abstract

Superior electrochemical performance of LiMn2O4 is considered to be one of the most important properties for lithium-ion batteries (LIBs). This paper presents an extremely high performance cathode material, multi-shelled LiMn1.95Co0.05O4 cages, which are created using a sucrose template. A small amount of Co substitution uniformly in a bulk material not only tunes Mn3+ in the minority with bulk stability improving, but can also accommodate specific capacity. In addition, the unique caged structure enhances Li+ diffusion and electrolyte penetration, leading to an outstanding rate capability. The as-synthesized cathode material exhibits a very high capacity of 154.4 mA h g-1, and retains a high value of 136.7 mA h g-1 after 500 cycles. The present work investigated the combined effect of a tunable average Mn oxidation state and unique multi-shelled cages in a controllable aerosol process.

Original languageEnglish
Pages (from-to)3953-3960
Number of pages8
JournalNew Journal of Chemistry
Volume42
Issue number5
DOIs
Publication statusPublished - 1 Jan 2018

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Materials Chemistry

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