Patent ID: 11923543
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A non-aqueous electrolyte secondary battery comprising:
a positive electrode;
a negative electrode; and
a non-aqueous electrolyte; wherein
the negative electrode contains graphite particles having a volume per mass of micropores having a micropore size of 2 nm or less, of 0.3 mm3/g or less, as determined from a nitrogen adsorption isotherm according to a DFT method, as a negative electrode active material,
a ratio of areas of internal pores to a total cross sectional area in a SEM image of cross sections of the graphite particles is 0.14 or less, and
the graphite particles have surfaces coated with a carbonized product.