Engineering hetero-epitaxial nanostructures with aligned Li-ion channels in Li-rich layered oxides for high-performance cathode application

Ming Xu, Linfeng Fei, Wei Lu, Zhaoyong Chen, Tao Li, Yan Liu, Guanyin Gao, Yanqing Lai, Zhian Zhang, Peng Wang, Haitao Huang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

63 Citations (Scopus)

Abstract

However, LLO cathode materials are facing a fundamental challenge of performance degradation as a result of the intrinsically poor rate capability and structural instability. Here we report the synthesis of high performance spinel/LLO heterostructured composite with aligned Li-ion channels by a composition modulated epitaxy method. The hetero-epitaxial nanostructure provides highly anisotropic Li-ion diffusion channels in spinel/LLO composite that significantly improve the electrochemical performance. Discharge capacities as high as 307, 282, 269, 227, 200 mA h g−1at 0.1, 0.5, 1.0, 3.0 and 5.0 C rates, respectively, and reversible capacity of 286 mA  h g−1after 100 cycles at 0.2 C rate can be attained. This work sheds light on the comprehensive design of heterostructured composites for high-performance electrode applications and opens up new opportunities for next-generation LIBs.
Original languageEnglish
Pages (from-to)271-280
Number of pages10
JournalNano Energy
Volume35
DOIs
Publication statusPublished - 1 May 2017

Keywords

  • Aligned Li-ion channels
  • Cathode
  • Controlled epitaxy
  • Li-ion battery
  • Spinel/layered composite

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

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