Carbon composite for the positive electrode of a lithium-sulfur battery and method for manufacturing the same
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- LG ENERGY SOLUTION LTD
- Filing Date
- 2026-02-06
- Publication Date
- 2026-06-09
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
【0027】 本発明による炭素複合体をリチウム硫黄電池の正極添加剤として使用したり、リチウム硫黄電池の硫黄含有化合物の担持体として使用したりして、リチウムポリスルフィドを速やかにリチウムスルフィドに転換することができる。
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Figure 2026094178000001_ABST
Abstract
Claims
1. Porous carbon material, Vanadium nitride particles located on the surface of the porous carbon material, A carbon composite containing [the above].
2. The specific surface area of the carbon composite is 250 m². ２ The carbon composite according to claim 1, wherein the amount is 1g or more.
3. The pore volume of the carbon composite is 1.0 cm ３ The carbon composite according to claim 1, wherein the amount is 1g or more.
4. The carbon composite according to claim 1, wherein the average pore size of the carbon composite is 10 nm or more.
5. The carbon composite according to claim 1, wherein the average particle diameter of the vanadium nitride particles is 200 nm or less.
6. The carbon composite according to claim 1, wherein the vanadium nitride particles are contained in an amount of 3 to 50 parts by weight per 100 parts by weight of the carbon composite.
7. The carbon composite according to claim 1, wherein the porous carbon material comprises carbon nanotubes (CNTs), reduced graphene oxide (rGO), or a mixture thereof.
8. A carbon composite according to any one of claims 1 to 7, A sulfur-containing compound supported within the pores of the carbon composite, A positive electrode active material containing the above.
9. The positive electrode active material according to claim 8, wherein the weight ratio of the sulfur-containing compound to the carbon composite is 1:1 to 9:
1.
10. Current collector and, A positive electrode active material layer located on at least one side of the current collector, comprising the positive electrode active material and binder described in claim 8, A positive electrode equipped with this feature.
11. The system includes a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and an electrolyte. A battery wherein the positive electrode is the positive electrode described in claim 10.
12. Current collector and, A positive electrode active material layer located on at least one side of the current collector, comprising a positive electrode active material, a binder, and a positive electrode additive, Equipped with, The positive electrode active material contains a sulfur-containing compound, The positive electrode comprising the carbon composite described in any one of claims 1 to 7, wherein the positive electrode additive.
13. The positive electrode according to claim 12, wherein the positive electrode additive is contained in an amount of 0.01 to 30 parts by weight per 100 parts by weight of the total positive electrode active material layer.
14. The system includes a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and an electrolyte. A battery wherein the positive electrode is the positive electrode described in claim 12.
15. A first step involves adding and dispersing a porous carbon material, vanadium nitride or its precursor, and a reducing agent in a solvent. A second step involves filtering the result of the first step to remove the solvent and drying it, A third step involves heat-treating the result of the second step in an inert atmosphere, Includes, Step 3 above is, A first step involves heat treatment at 350°C to 650°C, A second process involves heat treatment at 650°C to 1400°C, A method for producing a carbon composite according to claim 1, including the method described in claim 1.