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US 7,732,097 B2Granted
Battery
AssigneeSony Corporation
InventorKenichi Suzuki
Life of this patent
Estimating the term…
Abstract
A battery capable of improving cycle characteristics is provided. A cathode contains an oxide containing lithium and manganese such as Li4Mn5O12 as a cathode material. An anode contains a carbon material as and anode material. The weight ratio of the cathode material to the anode material is in the range from 2.03 to 2.53. The electrical capacity ratio of the cathode to the anode is in the range from 0.8 to 1.0. The open circuit voltage in full charge state per a pair of cathode and anode is from 2.9 V to 3.2 V.
Claims12
A coin-shaped battery comprising:
- a cathode can;
- a discoid cathode within the cathode can;
- an anode can;
- a discoid anode on the lithium metal foil within the anode can;
- a discoid lithium metal foil between the anode and the cathode can;
- a separator directly between the anode and the cathode;
- and
- an electrolyte including LiClO4 and a solvent containing ethylene carbonate, dimethyl carbonate, and methyl ethyl carbonate injected therein
- wherein,
- an open circuit voltage in full charge state per a pair of cathode and anode is in the range from 2.9 V to 3.2 V,
- the cathode contains Li4Mn5O12 material capable of inserting and extracting lithium,
- the anode contains a graphite material capable inserting and extracting lithium,
- a weight ratio of the cathode material to the anode material is in the range from 2.03 to 2.53, and
- a weight ratio of all of the lithium metal incorporated inside of the battery to the anode is in the range from 0.058 to 0.11.
11 more elements
A coin-shaped battery comprising:
- a cathode can;
- a discoid cathode within the cathode can;
- an anode can;
- a discoid anode within the anode can;
- a discoid lithium metal film between the anode and the anode can;
- a separator directly between the anode and the cathode;
- and
- an electrolyte, including LiClO4 and a solvent containing ethylene carbonate, dimethyl carbonate, and methyl ethyl carbonate injected therein
- wherein,
- an open circuit voltage in full charge state per a pair of cathode and anode is in the range from 2.9 V to 3.2 V,
- the cathode contains a Li4Mn5O12 material capable of inserting and extracting lithium,
- the anode contains a graphite material capable of inserting and extracting lithium,
- an electrical capacity ratio of the cathode to the anode is in the range from 0.8 to 1.0, and
- an electrical capacity ratio of all of the lithium metal incorporated inside the battery to the anode is in the range from 0.67 to 1.3.
11 more elements
Dependencies are inferred from the claim text.