Secondary battery
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorHirotetsu Suzuki
Life of this patent
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Abstract
Provided is a secondary battery comprising a cathode comprising a cathode current collector and a cathode mixture layer containing and a cathode active material, an anode comprising an anode current collector and coating layer, and a non-aqueous electrolyte containing a non-aqueous solvent and a lithium salt which has been dissolved in the non-aqueous solvent. A surface of the anode current collector is coated with the coating layer. The coating layer contains an alkaline earth metal fluoride. During charge, a lithium metal is deposited on the anode. During discharge, the lithium metal is dissolved in the non-aqueous electrolyte.
Claims12
A secondary battery, comprising:
- a cathode comprising a cathode current collector and a cathode mixture layer containing a cathode active material;
- an anode comprising an anode current collector and coating layer;
- and
- a non-aqueous electrolyte containing a non-aqueous solvent and a lithium salt which has been dissolved in the non-aqueous solvent,
- wherein:
- a surface of the anode current collector is coated with the coating layer,
- the coating layer consists of an alkaline earth metal fluoride,
- the cathode active material includes a lithium composite oxide having a crystal structure which belongs to a space group R-3m or C2/m, and the lithium composite oxide contains Ni and Co,
- the anode current collector is made of a metal material, the metal material including copper or an alloy thereof,
- the coating layer is directly disposed on the surface of the anode current collector,
- during charge, a lithium metal represented by the formula Li is deposited on the anode, and
- during discharge, the lithium metal represented by the formula Li is dissolved in the non-aqueous electrolyte.
Dependencies are inferred from the claim text.