Electrochemical device negative electrode and electrochemical device, and method for manufacturing electrochemical device negative electrode and method for manufacturing electrochemical device
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsYUSUKE NAKAMURA, HIDEO SAKATA, TOSHIAKI SHIMIZU
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Abstract
A electrochemical device negative electrode includes: a negative electrode core material; and a negative electrode material layer supported on the negative electrode core material. The negative electrode material layer contains a carbon material. And a surface layer portion of the negative electrode material layer has a lithium carbonate-containing region.
Claims13
An electrochemical device negative electrode comprising:
- a negative electrode core material;
- and
- a negative electrode material layer supported on the negative electrode core material, wherein:
- the negative electrode material layer contains a carbon material, and
- a surface layer portion of the negative electrode material layer has a lithium carbonate-containing region.
A method for manufacturing an electrochemical device negative electrode, the method comprising:
- preparing a negative electrode including a negative electrode core material and a negative electrode material layer supported on the negative electrode core material, the negative electrode material layer containing a carbon material;
- depositing metal lithium onto a surface of the negative electrode material layer;
- and
- forming, in the negative electrode material layer, a surface layer portion that includes a lithium carbonate-containing region having a thickness ranging from 1 nm to 100 nm, inclusive, by exposing the negative electrode in a carbon dioxide gas atmosphere, the negative electrode including the negative electrode material layer on which the metal lithium is deposited.
A method for manufacturing an electrochemical device, the method comprising:
- preparing a negative electrode including a negative electrode core material and a negative electrode material layer supported on the negative electrode core material, the negative electrode material layer containing a carbon material;
- depositing metal lithium onto a surface of the negative electrode material layer;
- preparing a positive electrode including a positive electrode core material and a positive electrode material layer supported on the positive electrode core material;
- forming an electrode body by interposing a separator between the negative electrode and the positive electrode, the negative electrode including the negative electrode material layer on which the metal lithium is deposited;
- and
- forming, in the negative electrode material layer, a surface layer portion that includes a lithium carbonate-containing region having a thickness ranging from 1 nm to 100 nm, inclusive, by exposing the electrode body in a carbon dioxide gas atmosphere.
Dependencies are inferred from the claim text.