Carbon material dispersion, electrode composition, electrode, and all-solid-state battery

JP2026094024APending Publication Date: 2026-06-09TOYO INK MFG CO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
TOYO INK MFG CO LTD
Filing Date
2025-10-15
Publication Date
2026-06-09

AI Technical Summary

Benefits of technology

【0018】 本開示によれば、低極性溶媒を用いることで硫化物系固体電解質の劣化が抑制され、且 つ、炭素材料の分散性(光沢)に優れる炭素材料分散液を提供することができる。また、 硫化物系固体電解質の劣化が抑制され、且つ、サイクル特性が良好で電池性能に優れる電 極組成物、電極及び、全固体電池を提供することができる。

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Abstract

In low-polarity solvent systems, the degradation of sulfide-based solid electrolytes is suppressed, and carbon materials To provide a carbon material dispersion liquid with excellent dispersibility (gloss). Degradation of sulfide-based solid electrolytes is suppressed. Furthermore, to provide an electrode composition, electrode, and all-solid-state battery with excellent battery performance. [Solution] The above problem is related to a carbon material dispersion containing a carbon material, a dispersant, and a low-polarity solvent, The dispersant is a polymer containing repeating linear alkylene groups in its main chain, and the carbon material This can be resolved by spraying.
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Claims

1. A carbon material dispersion comprising a carbon material, a dispersant, and a low-polarity solvent, wherein the dispersant is a polymer containing repeating linear alkylene groups in its main chain.

2. The carbon material dispersion according to claim 1, wherein the carbon material includes fibrous carbon.

3. The carbon material dispersion according to claim 1, wherein the low-polarity solvent comprises at least one selected from the group consisting of aromatic hydrocarbons and aliphatic hydrocarbons.

4. The carbon material dispersion according to claim 1, wherein the low-polarity solvent has a flash point of 55 to 120°C.

5. The carbon material dispersion according to claim 1, wherein the low-polarity solvent contains an aromatic hydrocarbon.

6. The carbon material dispersion according to claim 1, wherein the low-polarity solvent contains a condensed polycyclic hydrocarbon.

7. The carbon material dispersion according to claim 1, wherein the polymer satisfies the following requirement (i). (i) The ratio [y] / [x] of the number of moles of linear alkylene group repeating units [y] to the number of moles of alkylene group repeating units [x] is 0.5 to 1.

0.

8. The carbon material dispersion according to claim 1, wherein the polymer further comprises constituent units derived from monomers having aromatic rings.

9. The carbon material dispersion according to claim 1, wherein the polymer is at least one selected from the group consisting of styrene-ethylene-butylene-styrene block copolymer and styrene-ethylene-ethylene-propylene-styrene block copolymer.

10. An electrode composition comprising a carbon material dispersion, an active material, a solid electrolyte, and a binder according to any one of claims 1 to 9.

11. An electrode comprising a coating film of the electrode composition according to claim 10.

12. A solid-state battery comprising the electrode described in claim 11.

13. A method for producing a carbon material dispersion containing a carbon material, a dispersant, and a low-polarity solvent, A method for producing a carbon material dispersion, characterized by performing a dispersion treatment using a dispersion apparatus on a carbon material, a low-polarity solvent, and a dispersant which is a polymer containing repeating linear alkylene groups in its main chain.