PLATE-LIKE PARTICLE FOR CATHODE ACTIVE MATERIAL OF A LITHIUM SECONDARY BATTERY, AND A LITHIUM SECONDARY BATTERY,申请号US20090644381-传众专利搜索

PLATE-LIKE PARTICLE FOR CATHODE ACTIVE MATERIAL OF A LITHIUM SECONDARY BATTERY, AND A LITHIUM SECONDARY BATTERY

申请公布号：US2010159333(A1)

申请号：US20090644381

申请日期：2009.12.22

申请公布日期：2010.06.24

申请人：

NGK INSULATORS, LTD.

发明人：SUGIURA RYUTA;KOBAYASHI NOBUYUKI;YOKOYAMA SHOHEI;NANATAKI TSUTOMU

分类号：H01M4/583;H01M4/58;H01M4/88

主分类号：H01M4/583

摘要：By exposing the crystal plane (a plane other than the (003) plane: e.g., the (101) plane and (104) plane) through which lithium ions are favorably intercalated and deintercalated, more to an electrolyte, characteristics such as cell capacity is improved. The present invention relates a plate-like particle for a lithium secondary battery cathode active material. The particle has a layered rock salt structure. The (003) plane is oriented in a direction intersecting a particle plate surface. The porosity is 10% or less. The ratio of an observed surface area (β) determined from a measured value of a BET specific surface area to a virtual surface area (α) of the particle which is defined by the planar shape and thickness of the particle on the assumption that the plate surface is smooth,β/αis 3 or more and 10 or less