Non-aqueous electrolyte battery with gas adsorbing carbon material
View Patent ↗Disclosed is a non-aqueous electrolyte battery for suppressing the swell of a film-shaped exterior material. A gas adsorbing carbon material added to an anode mixture layer 9 of an anode 4 and/or to a cathode mixture layer 13 of a cathode 5 adsorbs a gas generated in the battery to suppress the gas storage in the battery, so that it is possible to suppress the swell of a film-shaped exterior material 3 caused by the storage of the gas generated within the battery.
1. A non-aqueous electrolyte battery comprising:
an anode having an anode mixture containing an anode active material;
a cathode having a cathode mixture containing a cathode active material;
a separator between the anode and the cathode;
an electrolyte including a polymer material and an electrolyte salt contained therein;
a film-shaped exterior material housing therein the anode, the cathode, the separator and the electrolyte; and
a gas adsorbing carbon layer on an inner surface of the film-shaped exterior material,
wherein,
the anode mixture includes a first gas adsorbing carbon material having a specific surface area not less than 130 m 2 /g, and
the cathode mixture includes an electrically conductive material and a second gas adsorbing carbon material, in an amount not less than 0.2 wt % and not larger than 8 wt % of the total weight of the cathode mixture.
2. The non-aqueous electrolyte battery according to claim 1 , wherein the first gas adsorbing carbon material includes an activated carbon.
3. The non-aqueous electrolyte battery according to claim 1 , wherein the first gas adsorbing carbon material is in an amount not less than 0.1 wt % and not larger than 6 wt % of the total weight of the anode mixture.
4. The non-aqueous electrolyte battery according to claim 1 , wherein, the second gas adsorbing carbon material is carbon black, and the carbon black is in an amount not less than 0.2 wt % and not larger than 4 wt % of the total weight of the cathode mixture.
5. The non-aqueous electrolyte battery according to claim 1 , wherein the film-shaped exterior material further includes a metal layer.
6. The non-aqueous electrolyte battery according to claim 1 , wherein the electrolyte is a gel electrolyte including a non-aqueous solvent, contained in the polymer material, in addition to the electrolyte salt.
7. The non-aqueous electrolyte battery according to claim 1 , wherein the electrolyte includes an organic high molecular weight material that is poly(vinylidene) fluoride or poly(vinylidene) fluoride-co-hexafluoropropylene.
8. The non-aqueous electrolyte battery according to claim 1 , wherein, the electrolyte salt includes LiPF 6 or LiBF 4 .
9. The non-aqueous electrolyte battery according to claim 6 , wherein the non-aqueous solvent contains ethylene carbonate.
10. The non-aqueous electrolyte battery according to claim 1 , wherein the first gas adsorbing carbon material admixed to the anode mixture layer is effective to adsorb gas.
11. The non-aqueous electrolyte battery according to claim 1 , wherein the electrolyte includes an organic high molecular weight material.
12. The non-aqueous electrolyte battery according to claim 1 , wherein the anode active material includes graphite.
13. The non-aqueous electrolyte battery according to claim 1 wherein the film-shaped exterior material is a laminate film including an exterior resin layer and a resin sealing layer bonded to a lead terminal.