Title:
LITHIUM ION SECONDARY BATTERY
Document Type and Number:
Japanese Patent JP2019061753
Kind Code:
A
Abstract:
To provide a technique which enables the decrease in resistance in a lithium ion secondary battery using a positive electrode doping material.SOLUTION: A lithium ion secondary battery comprises a positive electrode 1, a separator 2, and a negative electrode, and an electrolyte solution which are enclosed in a container. The positive electrode 1 has: a positive electrode current collector 10 having a typical current collecting part 11 and a tab part 12 extending from the typical current collecting part 11, and having a width narrower than that of the typical current collecting part 11; and a positive electrode active material layer 15 provided on the typical current collecting part 11 and including a positive electrode active material and a particular positive electrode doping material. The separator 2 has a pouch-like form arranged by firmly bonding two separator plates 20 to each other at a peripheral edge 20r. The typical current collecting part 11 is put in the separator 2. The tab part 12 extends to outside the separator 2. The typical current collecting part 11 has: a coating part 11r forming a portion of the typical current collecting part 11, on which the positive electrode active material layer 15 is provided; and an uncoated part 11f forming another portion of the typical current collecting part 11 and located between the tab part 12 and the coating part 11r, on which the positive electrode active material layer 15 is not provided.SELECTED DRAWING: Figure 2
Inventors:
MAKI TSUYOSHI
OMORI OSAMU
MIZUTANI EIJI
OMORI OSAMU
MIZUTANI EIJI
Application Number:
JP2017183072A
Publication Date:
April 18, 2019
Filing Date:
September 22, 2017
Export Citation:
Assignee:
TOYOTA IND CORP
International Classes:
H01M10/058; H01M2/18; H01M2/26; H01M4/13; H01M4/36; H01M4/38; H01M4/64; H01M10/052; H01M10/0568; H01M10/0569
Attorney, Agent or Firm:
Patent business corporation Kyoritsu