Title

LiNi0.5Mn1.5O4 hollow nano-micro hierarchical microspheres as advanced cathode for lithium ion batteries

RIS ID

109815

Publication Details

Xiao, Y., Zhu, Y., Gao, T., Zhong, B. & Guo, X. (2017). LiNi0.5Mn1.5O4 hollow nano-micro hierarchical microspheres as advanced cathode for lithium ion batteries. Ionics: international journal of ionics, 23 27-34.

Abstract

The high-voltage spinel-type LiNi0.5Mn1.5O4 (LNMO) is a promising cathode material for next-generation lithium ion batteries. In this study, hollow LNMO microspheres have been synthesized via co-precipitation method accompanied with high-temperature calcinations. The physical and electrochemical properties of the materials are characterized by x-ray diffraction (XRD), TGA, RAMAN, CV, scanning electron microscope (SEM), transmission electon microscopy (TEM), electrochemical impendence spectroscopy (EIS), and charge-discharge tests. The results prove that the microspheres combine hollow structures inward and own a cubic spinel structure with space group of Fd-3m, high crystallinity, and excellent electrochemical performances. With the short Li+ diffusion length and hollow structure, the hierarchical LNMO microspheres exhibit 138.2 and 108.5 mAh g−1 at 0.5 and 10 C, respectively. Excellent cycle stability is also demonstrated with more than 98.8 and 88.2 % capacity retention after 100 cycles at 1 and 10 C, respectively.

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Link to publisher version (DOI)

http://dx.doi.org/10.1007/s11581-016-1804-0