公开(公告)号：KR101409837B1

公开(公告)日：2014-06-20

申请号：KR1020120154712

申请日：2012-12-27

Applicant: 경기대학교 산학협력단 ,  한국전자통신연구원

Inventor： 박용준 ,  이혜진 ,  정은혜 ,  김창수

IPC: H01M4/131 ,  H01M4/62 ,  H01M4/505 ,  H01M4/525

CPC classification number: H01M4/366 ,  H01M4/131 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M10/052 ,  Y02E60/12

Abstract: Disclosed is a method for reforming the surface of a positive electrode active material for a lithium rechargeable battery by which electrochemical characteristics, thermal stability, and the likes are improved through a coating treatment of nanoparticles for the lithium rechargeable battery or positive electrode active material powder with a non-uniform shape with a stable material. The present invention provides a method for reforming the surface of a positive electrode active material for a lithium rechargeable battery, including (a) a step for dissolving dopamine in a buffer solution; (b) a step for forming a polydopamine thin film on the surface of the positive electrode active material through the addition and reaction of the positive electrode active material to and with the buffer solution in which the dopamine is dissolved; (c) a step for attaching an ion group of a coating precursor material or a hydrate to the surface of the positive electrode active material by the polydopamine through the addition and reaction of the positive electrode active material where the polydopamine thin film is formed to and with a coating solution containing the coating precursor material containing a metal element; and (d) a step for removing the polydopamine thin film through a heat treatment of the reactant of step (c) and forming a coating layer containing a compound containing the metal element on the surface of the positive electrode active material.

Abstract translation: 公开了一种重整用于锂二次电池的正极活性物质的表面的方法，其中通过用于锂可再充电电池或正极活性物质粉末的纳米颗粒的涂覆处理来改善电化学特性，热稳定性等， 具有稳定材料的不均匀形状。 本发明提供一种重整锂可再充电电池用正极活性物质的表面的方法，包括（a）将多巴胺溶解在缓冲溶液中的工序; （b）通过正极活性物质与多巴胺溶解的缓冲溶液的添加反应，在正极活性物质的表面形成聚多巴胺薄膜的工序; （c）通过所形成的聚多巴胺薄膜的正极活性物质与其形成的正极活性物质的添加和反应，通过聚多巴胺将涂料前体材料或水合物的离子组附着到正极活性物质的表面的步骤 与包含含有金属元素的涂料前体材料的涂布溶液; 和（d）通过步骤（c）的反应物的热处理除去聚多巴胺薄膜并在正极活性物质的表面上形成含有含有金属元素的化合物的涂层的步骤。