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发明公开
CN108666559A 氮掺杂碳包覆的NCA正极材料及锂离子电池与制备方法 无效 - 驳回 转让

氮掺杂碳包覆的NCA正极材料及锂离子电池与制备方法
摘要：
本发明公开一种氮掺杂碳包覆的NCA正极材料及锂离子电池与制备方法，其中：氮掺杂碳包覆的NCA正极材料其结构通式为LixNi1-y-zCoyAlzO2/NC，1≤x≤1.08，0.05＜y≤0.15，0＜z≤0.05，NC为氮掺杂碳有机物；LixNi1-y-zCoyAlzO2正极材料基体：NC的质量比为100:(2～8)。本发明还提供采用上述氮掺杂碳包覆的NCA正极材料的锂离子电池及上述正极材料的制备方法，该制备方法将含氮有机碳源与NCA正极材料混合，然后经过高温煅烧得到氮掺杂碳包覆的NCA正极材料，通过氮掺杂碳包覆在NCA正极材料的表面，能够极大地减少正极材料与电解液的接触，同时氮掺杂碳也能够提高三元材料电子电导率，提高电化学性能。
摘要（英）：

The invention discloses an N-doped C coated NCA cathode material, a lithium ion battery and a preparation method. The general structural formula of the N-doped C coated NCA cathode material is LixNi(1-y-z)CoyAlzO2/NC, wherein x is larger than or equal to 1 and smaller than or equal to 1.08, y is larger than 0.05 and smaller than or equal to 0.15, z is larger than 0 and smaller than or equal to 0.05, and NC is N-doped C organic matter; LixNi(1-y-z)CoyAlzO2 is a cathode material matrix; the mass ratio of NC is 100:(2-8). The invention also provides the lithium ion battery of the N-doped C coatedNCA cathode material and the preparation method of the cathode material. According to the preparation method, a N-containing organic C source is mixed with the NCA cathode material, then, the N-dopedC coated NCA cathode material is obtained after high-temperature calcination, the N-doped C coats the surface of the NCA cathode material, contact of the cathode material with an electrolyte can be greatly reduced, and meanwhile, the N-doped C can also increase the electronic conductivity and electrochemical performance of the ternary material.

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