Abstract
The high-voltage spinel LiNi0.5Mn1.5O4 (LNMO) with submicron particle size (LNMO-8505P70010) has been synthesized based on nickel-manganese compound, which is obtained from pre-sintering the nickel-manganese hydroxide precipitation at 850 °C. The LNMO materials based on nickel-manganese hydroxide (LNMO-70010, LNMO-850570010, and LNMO-8501070010) have also been synthesized for comparison to study the pre-sintering impact on the properties of LiNi0.5Mn1.5O4 material. The morphologies and structures of the obtained samples have been analyzed by X-ray powder diffraction and scanning electron microscopy. The nickel-manganese compound has a spinel structure with high crystallinity, making it a good precursor to form high-performance LNMO with lower content of Mn3+ and impurity. The obtained LNMO-8505P70010 delivers discharge capacities of 125.4 mA h g−1 at 0.2 C, and the capacity retention of 15 C reaches 73.8 % of the capacity retention of 0.2 C. Furthermore, it shows a superior cyclability with the capacity retention of 96.4 % after 150 cycles at 5 C. Compared with the synthesis method without pre-sintering, the synthesis method with pre-sintering can save energy while reaching the same discharge specific capacity.
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Acknowledgments
We acknowledge the National Natural Science Foundation of China (grant no. 21273058), China postdoctoral science foundation (grant nos. 2012M520731 and 2014M70350), and Heilongjiang postdoctoral financial assistance (LBH-Z12089) for their financial support.
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Liang, ZJ., Liang, R., Wang, ZB. et al. Investigation on LiNi0.5Mn1.5O4 cathode material based on the precursor of nickel-manganese compound for lithium-ion battery. Ionics 23, 35–41 (2017). https://doi.org/10.1007/s11581-016-1789-8
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DOI: https://doi.org/10.1007/s11581-016-1789-8