Battery
AssigneeSony Corporation
InventorsKenichi Ogawa, Hiroyuki Akashi, Kumiko Takagi, Tomitaro Hara, Yoshiaki Obana, Yosuke Hosoya
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Abstract
A battery capable of improving the energy density and improving the battery characteristics such as cycle characteristics and high temperature storage characteristics. A cathode and an anode are oppositely arranged with a separator in between. The open circuit voltage in full charge is in the range from 4.25 V to 6.00 V. The separator has a base material layer and a surface layer. The surface layer opposed to the cathode is formed from at least one from the group consisting of polyvinylidene fluoride, polytetrafluoroethylene, polypropylene, and aramid.
Claims21
A battery comprising:
- a cathode;
- an anode;
- a separator between said cathode and said anode, and the separator comprising a base layer and a surface layer;
- and
- an electrolyte;
- wherein,
- an open circuit voltage of the battery in a full charge state is in the range of 4.25 V to 6.00V,
- the surface layer is provided on at least the cathode side of the base layer and comprises at least one from the group consisting of polyvinylidene fluoride, polytetrafluoroethylene, polypropylene and aramid,
- the thickness of the surface layer is from 0.1 μm to 10 μm, and
- the thickness of the separator is from 5 μm to 25 μm.
A separator for a battery having an open circuit voltage in a full charge state in the range of 4.25 V to 6.00V and comprising:
- a base layer, and
- a surface layer,
- wherein,
- the surface layer is provided on at least the cathode side of the base layer and comprises at least one from the group consisting of polyvinylidene fluoride, polytetrafluoroethylene, polypropylene and aramid,
- the thickness of the surface layer is from 0.1 μm to 10 μm, and
- the thickness of the separator is from 5 μm to 25 μm.
Dependencies are inferred from the claim text.