Electrode active material, electrode and electrical storage device
The electrode active material includes a carbon material having a volume of macropores with 50 to 400 nm pore diameters of 0.05 to 0.40 cc/g. The carbon material may be a composite carbon material that contains a carbon material forming a core, and a coating carbon material covering at least part of the core-forming carbon material.
1. An electrode active material comprising a carbon material, wherein a volume of micropores having a pore diameter of 50 to 400 nm in the carbon material is 0.05 to 0.40 cc/g as measured by a nitrogen absorption method.
2. The electrode active material according to claim 1 , wherein the carbon material is a composite carbon material that contains a carbon material forming a core, and a coating carbon material covering at least part of the core-forming carbon material.
3. The electrode active material according to claim 2 , wherein the coating carbon material comprises a carbon black.
4. The electrode active material according to claim 1 , wherein the carbon material has a 50% volume cumulative diameter D50 of 1.0 to 10.0 μm.
5. An electrode comprising the electrode active material according to claim 1 .
6. An electrical storage device comprising the electrode according to claim 5 as a negative electrode.
7. A lithium ion capacitor comprising the electrode according to claim 5 as a negative electrode.
8. A lithium ion secondary battery comprising the electrode according to claim 5 as a negative electrode.
9. The electrode active material according to claim 1 , wherein the carbon material has a 50% volume cumulative diameter D50 of 1.0 to 5.0 μm.
10. The electrode active material according to claim 2 , wherein the coating carbon material comprises a calcined mixture of a carbon black and a pitch or a calcined mixture of a carbon black and a thermoplastic resin.