Title:
非水電解質二次電池用正極活物質、非水電解質二次電池用正極活物質の製造方法、非水電解質二次電池用正極、及び非水電解質二次電池
Document Type and Number:
Japanese Patent JP7330436
Kind Code:
B2
Abstract:
To provide a positive electrode active material increased in discharge capacity per unit volume.SOLUTION: A positive electrode active material for a nonaqueous electrolyte secondary battery comprises a lithium transition metal composite oxide. The lithium transition metal composite oxide has an α-NaFeO2 structure, and contains as a transition metal (Me), Ni, Co and Mn. The mole ratio Ni/Me of Ni to the transition metal (Me) satisfies 0.35≤Ni/Me. The mole ratio Li/Me of Li to the transition metal (Me) satisfies 1.05≤Li/Me. With the positive electrode active material for a nonaqueous electrolyte secondary battery, when the frequency of a maximum peak in a particle size distribution map arranged by taking a particle size (μm) for a horizontal axis, and a frequency (%) for a vertical axis is Fre1(%), a particle size corresponding to the maximum peak is D1(μm), a particle size representing a fifth part of D1 is D2(μm), and a frequency at D2 is Fre2(%), the ratio Fre2/Fre1 of Fre2 to Fre1 satisfies 0.12≤Fre2/Fre1.SELECTED DRAWING: Figure 1
Inventors:
Shinya Otani
Daisuke Yoshikawa
Daisuke Yoshikawa
Application Number:
JP2019174019A
Publication Date:
August 22, 2023
Filing Date:
September 25, 2019
Export Citation:
Assignee:
Gs Yuasa Co., Ltd.
International Classes:
H01M4/525; H01M4/505
Domestic Patent References:
| JP2003292322A | ||||
| JP2000082466A | ||||
| JP2016526759A |
Foreign References:
| WO2012121062A1 | ||||
| WO2013115314A1 | ||||
| WO2015056760A1 | ||||
| WO2013179924A1 | ||||
| WO2015049862A1 |
Attorney, Agent or Firm:
Satoru Matsumoto
Junko Yoshimizu
Satoru Aida
Junko Yoshimizu
Satoru Aida
Previous Patent: kitchen equipment
Next Patent: SILICON NITRIDE BASE SINTERED COMPACT AND ITS PRODUCTION
Next Patent: SILICON NITRIDE BASE SINTERED COMPACT AND ITS PRODUCTION