一种多元共掺杂长循环固态富锂锰基正极改性方法
本发明涉及电极材料技术领域,具体涉及一种多元共掺杂长循环固态富锂锰基正极改性方法。所述方法在锰镍钴碳酸盐前驱体共沉淀过程中引入Zn,经Ti前驱液处理及分段烧结形成Zn、Ti掺杂主体材料,再进行Zr二次掺杂改性,随后采用含锂、硼、磷和锆的前驱液在材料表面原位形成Zr改性锂硼磷酸盐复合包覆层。本发明通过体相、近表层及表界面的协同调控,可抑制高电压氧流失和循环结构劣化,降低固态界面阻抗,提高富锂锰基正极材料的倍率性能及长循环稳定性。
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