正極活物質用粉末、正極活物質およびナトリウム二次電池

Japanese Patent JP5309581

B2

The present invention provides a positive electrode active material that can suppress the necessity of performing sieving and is suitable for use in secondary batteries, particularly sodium secondary batteries. Also provided is a powder for a positive electrode active material as a raw material for the positive electrode active material. The powder for a positive electrode active material of the present invention comprises Mn-containing particles. In the cumulative particle size distribution on the volume basis of particles constituting the powder, D50, which is the particle diameter at a 50% cumulation measured from the smallest particle, is in the range of from 0.1 µm to 10 µm, and 90 vol% or more of the particles constituting the powder are in the range of from 0.3 times to 3 times D50. The powder for a positive electrode active material comprises Mn-containing particles, and 90 vol% or more of the particles constituting the powder are in the range of from 0.6 µm to 6 µm. The positive electrode active material is a powdery positive electrode active material obtained by calcining a mixture of the powder for positive electrode active material and a sodium compound. The positive electrode for sodium rechargeable batteries comprises the positive electrode active material.

Makiji Masami
Takeshi Yamamoto

JP2008023673A

October 09, 2013

February 04, 2008

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Sumitomo Chemical Co., Ltd.

H01M4/505; H01M4/525; H01M10/054; H01M50/414; H01M50/417; H01M50/426; H01M50/489; H01M50/491

JP10081520A
JP10081521A
JP2003187801A
JP2007019035A
JP2003203632A
JP2004362934A

Toru Nakayama
Toru Sakamoto

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