Journal of Solid State Electrochemistry

, Volume 22, Issue 8, pp 2587–2596 | Cite as

Enhanced electrochemical performance of Li1.2Ni0.2Mn0.6O2 cathode materials through facile layered/spinel phase tuning

  • Bozhou Chen
  • Bangchuan Zhao
  • Jiafeng Zhou
  • Jiyue Song
  • Zhitang Fang
  • Jianming Dai
  • Xuebin Zhu
  • Yuping Sun
Original Paper


Series Li1.2Ni0.2Mn0.6O2 (LNMO) cathode materials have been synthesized by an improved one-step solvothermal method. Structural characterization reveals that all samples are composed of layered and spinel phases and the spinel phase content can be easily tuned by Na-doping or reducing lithium in the LNMO materials. The spinel phase content increases from 2.6% for the x = 0.02 Na-doped sample to 9.2% for the deficient lithium sample. Electrochemical performance measurement shows that the electrochemical performance of the series samples is closely related to the spinel phase content. The deficient lithium sample with the largest spinel phase content has the most excellent cyclic and rate performance. The deficient lithium sample displays a high discharge capacity of 118.9 mAh g−1 at 5 C rate and much more stable capacity retention of 89.4% after 50 cycles at 0.1 C rate, whereas the corresponding values are 66.7, 27.4, and 2.7 mAh g−1 at 5 C rate and 69.4, 58.7, and 37.8% at 0.1 C rate for the Na-doped samples with x = 0, 0.01, and 0.02. The excellent cyclic and rate performance of the electrodes with higher spinel phase content originated from more 3D Li-ion diffusion channels in spinel framework and the relatively stable layered structure improved by an appropriate spinel phase integration.


Cathode materials Spinel phase Solvothermal method Na-doping Li-ion diffusion channels 


Funding information

This work is supported by the Nation Key Research and Development program under Contract No. 2017YFA0402800 and the National Nature Science Foundation of China under Contract Nos. U1732160 and 11504380.

Supplementary material

10008_2018_3953_MOESM1_ESM.doc (36.2 mb)
ESM 1 (DOC 37095 kb)


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Bozhou Chen
    • 1
    • 2
  • Bangchuan Zhao
    • 1
  • Jiafeng Zhou
    • 1
    • 2
  • Jiyue Song
    • 1
    • 2
  • Zhitang Fang
    • 1
  • Jianming Dai
    • 1
  • Xuebin Zhu
    • 1
  • Yuping Sun
    • 1
    • 3
  1. 1.Key Laboratory of Materials Physics, Institute of Solid State PhysicsChinese Academy of SciencesHefeiPeople’s Republic of China
  2. 2.University of Science and Technology of ChinaHefeiPeople’s Republic of China
  3. 3.High Magnetic Field LaboratoryChinese Academy of SciencesHefeiPeople’s Republic of China

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