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发明公开
CN110085827A 一种富锂锰基正极材料及其制备方法和应用 无效 - 驳回

一种富锂锰基正极材料及其制备方法和应用
摘要：
本发明提供了一种富锂锰基正极材料及其制备方法和应用，其化学式为xLi2MnO3·(1-x)LiMSnyCezO2，其中：M为Ni、Co和Mn中的至少两种，0.2≤x≤0.8，0.005≤y≤0.02，0.01≤z≤0.05。本发明通过掺杂锡铈两种元素，制得的富锂锰基正极材料的晶体结构较稳定，铈锡共掺杂后的富锂锰基正极材料首次库伦效率和倍率性能得到了改善，且循环稳定性得到了显著提高，尤其是，循环过程中电压的衰减得到了明显的抑制；此外，该制备方法工艺简单、利用氢氧根共沉淀反应制备前驱体，合成效率高，适合规模化生产。
摘要（英）：

The invention provides a lithium-rich manganese-based cathode material and a preparation method and application thereof. A chemical formula of the cathode material is xLi2MnO3.(1-x)LiMSnyCezO2, M represents at least two selected from Ni, Co and Mn, 0.2<=x<=0.8, 0.005<=y<=0.02, and 0.01<=z<=0.05. The lithium-rich manganese-based cathode material doped with tin and cerium is relatively stable in crystal structure, the first coulombic efficiency and power multiplying performance of the lithium-rich manganese-based cathode material co-doped with tin and cerium are improved, the circulating stability is improved substantially, and especially, voltage attenuation in the circulation process is inhibited obviously; and in addition, the preparation method is simple in technology, hydroxide is precipitated to prepare a precursor, the synthesis efficiency is high, and the method is suitable for large-scale production.

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