Battery, method of charging and discharging the battery and charge-discharge control device for the battery
First Claim
1. A battery, comprising:
- an anode including silicon (Si) as an element and being capable of inserting and extracting lithium (Li);
a cathode being capable of inserting and extracting lithium; and
an electrolyte, wherein a molar ratio of lithium atoms to silicon atoms (Li/Si) in the anode is 4.0 or less.
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Accused Products
Abstract
Provided is a battery capable of improving cycle characteristics through reducing a structural fracture according to charge and discharge of an anode and a reaction of the with an electrolyte. An anode active material layer includes at least one kind selected from the group consisting of a simple substance and alloys of Si capable of forming an alloy with Li. A cathode and an anode are formed so that the molar ratio Li/Si in the anode at the time of charge is 4.0 or the potential of the anode vs. Li is 0.04 V or more through adjusting, for example, a ratio between a cathode active material and an anode active material. Moreover, the cathode and the anode are formed so that the molar ratio Li/Si in the anode at the time of discharge is 0.4 or more, or the potential of the anode vs. Li is 1.4 V or less.
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Citations
18 Claims
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1. A battery, comprising:
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an anode including silicon (Si) as an element and being capable of inserting and extracting lithium (Li);
a cathode being capable of inserting and extracting lithium; and
an electrolyte, wherein a molar ratio of lithium atoms to silicon atoms (Li/Si) in the anode is 4.0 or less. - View Dependent Claims (2, 3, 4, 5)
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6. A battery, comprising:
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an anode including silicon (Si) as an element and being capable of inserting and extracting lithium (Li);
a cathode being capable of inserting and extracting lithium; and
an electrolyte, wherein a potential of the anode vs. lithium metal as a reference po tential is 0.04 V or more. - View Dependent Claims (7, 8, 9, 10)
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11. A method of charging and discharging a battery, the battery comprising an anode which includes silicon (Si) as an element and is capable of inserting and extracting lithium (Li),
wherein at the time of charge, a molar ratio of lithium atoms to silicon atoms (Li/Si) in the anode is 4.0 or less.
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13. A method of charging and discharging a battery, the battery comprising an anode which includes silicon (Si) as an element and is capable of inserting and extracting lithium (Li),
wherein a potential of the anode vs. lithium metal as a reference potential at the time of charge is 0.04 V or more.
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15. A charge-discharge control device for a battery, the battery comprising an anode which includes silicon (Si) as an element and is capable of inserting and extracting lithium (Li), the charge-discharge control device comprising.
a charge control portion for controlling a molar ratio of lithium atoms to silicon atoms (Li/Si) in the anode at the time of charge to 4.0 or less.
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17. A charge-discharge control device for a battery, the battery comprising an anode which includes silicon as an element and is capable of inserting and extracting lithium (Li), the charge-discharge control device comprising:
a charge control portion for controlling a potential of the anode vs. lithium metal as a reference potential at the time of charge to 0.04 V or more. - View Dependent Claims (18)
Specification