Electrode material and secondary cell

Patent metadata

Field	Value
Publication number	US-2016164104-A1
Application number	US-201414905135-A
Country	US
Kind code	A1
Filing date	May 20, 2014
Priority date	Jul 25, 2013
Publication date	Jun 9, 2016
Grant date	—

Abstract

An electrode material for a secondary cell includes a porous carbon material having an absolute value of a differential value of a mass using a temperature as a parameter exceeding 0 at 360° C. and being 0.016 or more at 290° C. provided by thermally analyzing a mixture of the porous carbon material and S 8 sulfur at a mass ratio of 1:2.

First claim

What is claimed is:

1 . An electrode material for a secondary cell, comprising a porous carbon material having an absolute value of a differential value of a mass using a temperature as a parameter exceeding 0 at 360° C. and being 0.016 or more at 290° C. provided by thermally analyzing a mixture of the porous carbon material and S8 sulfur at a mass ratio of 1:2.

2 . An electrode material for a secondary cell, comprising a porous carbon material having an absolute value of a differential value of a mass using a temperature as a parameter exceeding 0 provided by thermally analyzing a mixture of the porous carbon material and S8 sulfur at a mass ratio of 1:2 at a temperature where an absolute value of a differential value of a mass using a temperature as a parameter being 0 provided by thermally analyzing a mixture of Ketjen black and S8 sulfur at a mass ratio of 1:2.

3 . An electrode material for a secondary cell, comprising a porous carbon material having an absolute value of a differential value of a mass using a temperature as a parameter being 0.01 or more at 325° C. provided by thermally analyzing a mixture of the porous carbon material and S8 sulfur at a mass ratio of 1:2.

4 . The electrode material for a secondary cell according to claim 1 , wherein
the porous carbon material includes a plant-derived material containing 5% by mass or more of silicon as a raw material.

5 . The electrode material for a secondary cell according to claim 1 , wherein
the porous carbon material includes a peat or a wood-based material as a raw material.

6 . The electrode material for a secondary cell according to claim 1 , wherein
the porous carbon material has a surface area of 10 m2/g or more by a nitrogen BET method, and has a pore volume of 0.1 cm3/g or more by a BJH method and an MP method.

7 . The electrode material for a secondary cell according to claim 1 , wherein
the porous carbon material has a half-value width of 5 degrees or less based on a diffraction angle of 2θ in a diffraction intensity peak of a (100) face or a (101) face by an X ray diffractometry.

8 . A secondary cell comprising an electrode material, comprising a porous carbon material having an absolute value of a differential value of a mass using a temperature as a parameter exceeding 0 at 360° C. and being 0.016 or more at 290° C. provided by thermally analyzing a mixture of the porous carbon material and S8 sulfur at a mass ratio of 1:2.

9 . A secondary cell comprising an electrode material, comprising a porous carbon material having an absolute value of a differential value of a mass using a temperature as a parameter exceeding 0 provided by thermally analyzing a mixture of the porous carbon material and S8 sulfur at a mass ratio of 1:2 at a temperature where an absolute value of a differential value of a mass using a temperature as a parameter being 0 provided by thermally analyzing a mixture of Ketjen black and S8 sulfur at a mass ratio of 1:2.

10 . A secondary cell comprising an electrode material, comprising a porous carbon material having an absolute value of a differential value of a mass using a temperature as a parameter being 0.01 or more at 325° C. provided by thermally analyzing a mixture of the porous carbon material and S8 sulfur at a mass ratio of 1:2.

11 . The secondary cell according to claim 8 , wherein
the porous carbon material includes a plant-derived material containing 5% by mass or more of silicon as a raw material.

12 . The secondary cell according to claim 8 , wherein
the porous carbon material includes a peat or a wood-based material as a raw material.

13 . The secondary cell according to claim 8 , wherein
the porous carbon material has a surface area of 10 m2/g or more by a nitrogen BET method, and has a pore volume of 0.1 cm3/g or more by a BJH method and an MP method.

14 . The secondary cell according to claim 8 , wherein
the porous carbon material has a half-value width of 5 degrees or less based on a diffraction angle of 2θ in a diffraction intensity peak of a (100) face or a (101) face by an X ray diffractometry.

15 . The secondary cell according to claim 8 , wherein
the electrode is configured as a cathode.

16 . The secondary cell according to claim 8 , comprising a lithium-sulfur secondary cell, wherein
the electrode supports sulfur or a sulfur compound.

Assignees

• Sony Corp

Inventors

• Yamanoi Shun
• Tabata Seiichiro
• Iida Hironori
• Kishimoto Kenji
• Saito Yosuke
• Yamada Shinichiro
• Takeshi Kazumasa
• Hinokuma Koichiro

Classifications

• H01M10/052

  Li-accumulators · CPC title

• H01M4/38

  of elements or alloys · CPC title

• H01M4/663 Primary

  containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres · CPC title

• H01M4/13 Primary

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title