Title:
POSITIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, POSITIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, LITHIUM ION SECONDARY BATTERY, AND METHOD FOR EVALUATING POSITIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY
Document Type and Number:
Japanese Patent JP2018163742
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a positive electrode material for a lithium ion secondary battery, which has optimal coatability of a carbonaceous coating film.SOLUTION: The positive electrode material for a lithium ion secondary battery is an active material particle including: a center particle expressed by a general formula of LiFeMPO(0.95≤x≤1.1, 0.8≤y≤1.1, 0≤z≤0.2, and M is at least one kind selected from a group of Mg, Ca, Co, Sr, Ba, Ti, Zn, B, Al, Ga, In, Si, Ge, and a rare earth element); and a carbonaceous coating film that coats a surface of the center particle. A specific surface ratio Δb/BET is 0.25 or more and 0.35 or less (Δbis a difference between a chromaticity bin a Labcolorimetric system after heating the active material particle for a 72-hour under an air atmosphere and at 180°C and the chromaticity bbefore heating the active material particle).SELECTED DRAWING: None
Inventors:
KOYAMA MASATAKA
KITAGAWA TAKARO
KITAGAWA TAKARO
Application Number:
JP2017059070A
Publication Date:
October 18, 2018
Filing Date:
March 24, 2017
Export Citation:
Assignee:
SUMITOMO OSAKA CEMENT CO LTD
International Classes:
H01M4/58; C01B25/45; H01M4/36
Domestic Patent References:
| JP2016103352A | 2016-06-02 | |||
| JP6015835B1 | 2016-10-26 | |||
| JP2012216468A | 2012-11-08 | |||
| JP2016212996A | 2016-12-15 | |||
| JP2014179292A | 2014-09-25 | |||
| JP6210144B1 | 2017-10-11 | |||
| JP2011529257A | 2011-12-01 | |||
| JP2013041697A | 2013-02-28 | |||
| JP2016072135A | 2016-05-09 | |||
| JP2011210490A | 2011-10-20 | |||
| JP2016195003A | 2016-11-17 | |||
| JP2015060799A | 2015-03-30 | |||
| JP2011249324A | 2011-12-08 | |||
| JP2008159446A | 2008-07-10 |
Attorney, Agent or Firm:
Masatake Shiga
Tadashi Takahashi
Suzuki Mitsuyoshi
Tadashi Takahashi
Suzuki Mitsuyoshi