Secondary battery
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsKenji Matsubara, Kazuhiro Iida, Masanobu Takeuchi, Atsushi Fukui
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Abstract
A secondary battery which comprises a positive electrode, a negative electrode, and an electrolytic solution, wherein the electrolytic solution comprises water, a lithium salt, and an additive, the additive including at least one of alkaline-earth metal salts, dicarboxylic acids, carboxylic anhydrides, and organic carbonates, and the negative electrode comprises a negative active material, the negative active material having a silane coupling agent adherent to the surface thereof.
Claims12
A secondary battery comprising a positive electrode, a negative electrode, and an electrolyte solution, wherein
- the electrolyte solution contains water, a lithium salt, and an additive,
- the negative electrode includes a negative electrode active material, and a silane coupling agent is adhered to a surface of the negative electrode active material,
- the negative electrode active material contains carbon material as a main component,
- the additive includes an organic carbonate,
- a content of the water in the electrolyte solution relative to a total amount of the electrolyte solution is in a range from 8.5% by mass to 21% by mass,
- wherein the organic carbonate contains at least one of fluoroethylene carbonate or vinylidene carbonate,
- wherein the silane coupling agent is a fluoroalkylsilane and the fluoroalkylsilane includes C8F17CH2CH2—Si(OCH3)3,
- wherein the organic carbonate is present in a first molar ratio in a range from 1:0.05 to 1:1 relative to the lithium salt, and the water is present in a second molar ratio in a range from 1:1 to 1:2.5 relative to the lithium salt.
Dependencies are inferred from the claim text.