Patents Assigned to SEMIDONCONDUCTOR ENERGY LABORATORY CO., LTD.
  • Lithium—manganese composite oxide, secondary battery, and electric device
    Patent number: 9293236
    Abstract: The amount of lithium ions that can be received and released in and from a positive electrode active material is increased, and high capacity and high energy density of a secondary battery are achieved. Provided is a lithium-manganese composite oxide represented by LixMnyMzOw, where M is a metal element other than Li and Mn, or Si or P, and y, z, and w satisfy 0?x/(y+z)<2, y>0, z>0, 0.26?(y+z)/w<0.5, and 0.2<z/y<1.2. The lithium manganese composite oxide has high structural stability and high capacity.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: March 22, 2016
    Assignee: SEMIDONCONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Takahiro Kawakami, Shuhei Yoshitomi, Teruaki Ochiai, Yumiko Saito, Yohei Momma, Satoshi Seo, Mayumi Mikami, Shunsuke Adachi