Lithium secondary battery
AssigneeNEC Corporation
InventorTakeshi AZAMI
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Abstract
Provided is a lithium ion secondary battery that has excellent cycle characteristics and employs a silicon material for a negative electrode. This lithium ion secondary battery is characterized by having a negative electrode comprising a plate-like artificial graphite and a material comprising silicon as a constituent element, wherein at least some of particles of the plate-like artificial graphite are bent and have a crease on a plate face.
Claims13
A lithium ion secondary battery comprising a negative electrode comprising a plate-like artificial graphite and a material comprising silicon as a constituent element,
- wherein at least some of particles of the plate-like artificial graphite are bent and have a crease on a plate face.
A method for manufacturing a lithium ion secondary battery, comprising the steps of:
- fabricating an electrode element by stacking a negative electrode and a positive electrode via a separator, and
- encapsulating the electrode element and an electrolyte solution into an outer package,
- wherein the negative electrode comprises a plate-like artificial graphite and a material comprising silicon as a constituent element, and at least some of particles of the plate-like artificial graphite are bent and have a crease on a plate face.
Dependencies are inferred from the claim text.