Investigation on LiNi_0.5Mn_1.5O₄ cathode material based on the precursor of nickel-manganese compound for lithium-ion battery

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• 作者：Zhen-Jin Liang ; Rui Liang ; Zhen-Bo Wang ; Yuan Xue ; Fu-Da Yu ; Da Liu…
• 关键词：Lithium ; ion batteries ; Cathode material ; LiNi0.5Mn1.5O4 ; Pre ; sintering
• 刊名：Ionics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：23
• 期：1
• 页码：35-41
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Electrochemistry; Renewable and Green Energy; Optical and Electronic Materials; Condensed Matter Physics; Energy Storage;
• 出版者：Springer Berlin Heidelberg
• ISSN：1862-0760
• 卷排序：23

文摘

The high-voltage spinel LiNi_0.5Mn_1.5O₄ (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 LiNi_0.5Mn_1.5O₄ 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.