Electrode material for metal-air battery

Patent metadata

Field	Value
Publication number	US-2017194650-A1
Application number	US-201515325911-A
Country	US
Kind code	A1
Filing date	Jul 9, 2015
Priority date	Jul 15, 2014
Publication date	Jul 6, 2017
Grant date	—

Abstract

The present invention provides an electrode material for metal-air batteries which has a homogeneous co-continuous structure due to a carbon skeleton and voids and is excellent in terms of permeability to and diffusibility of ions, oxygen, electrolytes, and electrolytic solutions and which, due to the formation of the carbon network, can rapidly diffuse the heat generated by battery reactions and has satisfactory electrical conductivity. The electrode material for metal-air batteries includes a porous carbon material having a co-continuous structure portion in which a skeleton constituted of carbon and voids form a co-continuous structure and which has a structural period, as calculated by X-ray scattering method or X-ray CT method, of 0.002-10 μm.

First claim

1 . An electrode material for metal-air batteries comprising a porous carbon material having a co-continuous structure portion in which a skeleton constituted of carbon and voids form a co-continuous structure and which has a structural period, as calculated by X-ray scattering method or X-ray CT method, of 0.002 μm to 10 μm.

2 . The electrode material for metal-air batteries according to claim 1 , wherein a ratio ((a)/(b)) between a half width of a scattering intensity peak (a) and a scattering angle corresponding to a local maximal value of a scattering intensity peaks (b) used for calculation of the structural period in the spectrum obtained from the X-ray scattering method or the X-ray CT method, is 1.5 or less.

3 . The electrode material for metal-air batteries according to claim 1 , wherein the porous carbon material has fine pores having the average diameter of 0.1 to 10 nm on the surface thereof.

4 . The electrode material for metal-air batteries according to claim 1 , wherein the porous carbon material has a portion not substantially forming a co-continuous structure.

5 . The electrode material for metal-air batteries according to claim 1 , wherein the porous carbon material includes a carbon crystal grain.

6 . The electrode material for metal-air batteries according to claim 1 which is formed by further compositing an active material with the porous carbon material.

7 . The electrode material for metal-air batteries according to claim 1 , wherein the porous carbon material has the form of a fiber or a film.

8 . The electrode material for metal-air batteries according to claim 1 , wherein the porous carbon material has a particle form.

9 . The electrode material for metal-air batteries according to claim 8 further comprising a binder.

10 . The electrode material for metal-air batteries according to claim 1 , wherein a weight ratio of the porous carbon material is 60% or more.

Assignees

• Toray Industries

Inventors

• Mihara Takaaki
• Tanaka Kentaro
• Takeuchi Kosaku
• Horiguchi Tomoyuki

Classifications

• C01P2006/40

  Electric properties · CPC title

• C01B32/05 Primary

  Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30 · CPC title

• C01P2004/03

  obtained by SEM · CPC title

• C01B32/00

  Carbon; Compounds thereof (C01B21/00, C01B23/00 take precedence; percarbonates C01B15/10; carbon black C09C1/48) · CPC title

• H01G11/00

  Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof · CPC title