Chinese Academy of Sciences

Hubei Wanrun New Energy Technology Development Co. Ltd

Yaletu Saixi

Zhaoping Liu

Yonggao Xia

Bao Qiu

Qingwen Gu

Provided is a high-entropy positive electrode material, preparation method and application thereof. The high-entropy positive electrode material has a general formula as shown in the following formula: LiABCDOMN, wherein A is a metallic element having a valence of +2, B is a metallic element having a valence of +3, C is a metallic element having a valence of +4, D is a metallic element having a valence of +5, M is an element having a valence of +7, and N is an element having a valence of +8; and 0≤a<1, 0<x<1, 0<y<1, 0<z<1, 0<b<1, 0<c<1, d>0. This high-entropy positive electrode material is designed from the structure of the material itself. Compared with the conventional positive electrode materials, it has high specific discharge capacity and has a stable structure during the cycling without oxygen evolution.

High-entropy positive electrode material, preparation method and application thereof

Provided is a positive electrode material for a lithium battery with an atomic ratio expressed by the formula (I) Li(MMn)(OZ) for 0.8&#x2264;a&#x2264;1.2, 0&#x2264;x&#x2264;1 and 0&#x2264;y&#x2264;1 in which M is one or more of Li, Na, K, Ca, Mg, Al, Ti, Sc, Ge, V, Cr, Zr, Co, Ni, Zn, Cu, La, Ce, Mn, Hf, Nb, Ta, Mo, W, Ru, Ag, Sn, Pb and Si and Z is one or more of OH, halogens, N, P, S and O, and the primary particles of the positive electrode material have a spheroidal topography. The adjacent (111) family planes of the primary particles are connected by curved surfaces without obvious edges. A preparing method of a positive electrode material for a lithium battery and a lithium battery are also provided. The positive electrode material of the present invention provides a good high-temperature cycling performance and filling capability.

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Zhejiang, China

Yaletu Saixi