, Volume 25, Issue 1, pp 71–79 | Cite as

Enhanced rate performance of nanosized RGO-LiNi0.5Mn1.5O4 composites as cathode material by a solid-state assembly method

  • Chao Gao
  • Haiping Liu
  • Jingmin Hao
  • Qiang Chen
  • Sifu Bi
  • Lu Chen
Original Paper


In this paper, LiNi0.5Mn1.5O4 (LNMO) coated with various amount of RGO (0, 0.5, 1, and 2 wt%) were successfully synthesized by solid-state assembly method. The physical properties of LNMO and RGO-LNMO were investigated by x-ray diffraction (XRD), Raman spectra, scanning electron microscopy (SEM), and transmission electron microscope (TEM). XRD and Raman spectrum exhibit all samples that are well crystallized in P4332 space group; SEM and TEM results show the uniform size of the particles is 1 ~ 2 μm with octahedral structure, and LNMO is successfully wrapped by RGO. The electrochemical properties of RGO-LNMO visibly improved compared with the bared LNMO, especially at high current rate, which has been proven by galvanostatic charge-discharge test, cycle performance test, and rate capacity test. For example, the bared LNMO delivers a discharge capacity of 39.2 mAh g−1 at 10 C rate, while that of 1-wt% RGO-LNMO was 86.2 mAh g−1, which was approximately 2.5 times more than that of the bared LNMO. At 10 C rate after 1000 cycles, 2-wt% RGO-LNMO delivers a discharge capacity of 50.6 mAh g−1 with a capacity retention of 86.7%, while the bared LNMO delivers a discharge capacity of 27.6 mAh g−1 with a capacity retention of 52.5%, only about 54% of the 2-wt% RGO-LNMO. EIS results show the charge transfer resistance of LNMO decreased after coating with RGO, which was favorable for improving electrochemical performance.


LiNi0.5Mn1.5O4 High voltage High rate performace Cycle performace 



The authors greatly appreciate HIT & Yun Shan Group Research and Development on Graphite Area.

Funding information

The authors greatly appreciate the following financial supports: the Natural Science Foundation of Shandong Province (ZR2018MEM017) and the Science and Technology Program of WeiHai (2015DXGJMS017).


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Copyright information

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

Authors and Affiliations

  • Chao Gao
    • 1
  • Haiping Liu
    • 1
  • Jingmin Hao
    • 1
  • Qiang Chen
    • 1
  • Sifu Bi
    • 2
  • Lu Chen
    • 1
  1. 1.School of Marine Science and TechnologyHarbin Institute of TechnologyWeihaiChina
  2. 2.School of Materials Science and EngineeringHarbin Institute of TechnologyWeihaiChina

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