公开(公告)号：US20160254542A1

公开(公告)日：2016-09-01

申请号：US15027623

申请日：2013-10-23

Applicant: HITACHI, LTD.

Inventor： Hiroaki KONISHI ,  Akira GUNJI ,  Tatsuya TOYAMA ,  Xiaoliang FENG ,  Sho FURUTSUKI ,  Toyotaka YUASA ,  Mitsuru KOBAYASHI ,  Hisato TOKORO ,  Shuichi TAKANO ,  Takashi NAKABAYASHI

IPC: H01M4/525 ,  H02J7/00 ,  H01M10/46 ,  H01M10/48 ,  H01M10/0525 ,  H01M4/505

CPC classification number: H01M4/525 ,  C01G53/50 ,  C01P2006/11 ,  H01M4/505 ,  H01M10/0525 ,  H01M10/44 ,  H01M10/46 ,  H01M10/48 ,  H01M2004/028 ,  H02J7/007

Abstract: The objective of the present invention is to provide a lithium ion secondary battery, the charged state of which can be detected from the battery voltage with high accuracy, and which is able to achieve a high capacity in a high-potential range. This objective can be achieved by a cathode active material for lithium ion secondary batteries, which is composed of a lithium transition metal oxide containing Li and metal elements including at least Ni and Mn, and which is characterized in that: the atomic ratio of Li to the metal elements satisfies 1.15

Abstract translation: 本发明的目的是提供一种锂离子二次电池，其充电状态可以从电池电压以高精度检测，并且能够在高电位范围内实现高容量。 该目的可以通过由锂离子二次电池的锂过渡金属氧化物和至少包含Ni和Mn的金属元素构成的锂离子二次电池用正极活性物质来实现，其特征在于：Li与 金属元素满足1.15