US 11,699,782 B2 · Secondary battery

Abstract

A secondary battery in which graphite that is an active material can occlude and release lithium efficiently is provided. Further, a highly reliable secondary battery in which the amount of lithium inserted and extracted into/from graphite that is an active material is prevented from varying is provided. The secondary battery includes a negative electrode including a current collector and graphite provided over the current collector, and a positive electrode. The graphite includes a plurality of graphene layers. Surfaces of the plurality of graphene layers are provided substantially along the direction of an electric field generated between the positive electrode and the negative electrode.

Claims5

Dependent claims

An active material comprising:

a graphite comprising a plurality of graphene layers;
and
a film comprising one or more of silicon and phosphorous,
wherein an edge of each of the plurality of graphene layers is chemically bonded to the film by one of C—O—Si and C—O—P, and
wherein the graphite is capable of inserting and extracting lithium ions via the film.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/904,618Filed 18 Jun 2020 · continuation

Priority

JP 2012-16148920 Jul 2012

Published

US 2020/0321605 A18 Oct 2020

Granted

11 Jul 2023

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

H01M 4/133
Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof: electrodes based on…
H01M 4/366
Composites: as layered products
H01M 4/587
Carbonaceous material, e.g. graphite-intercalation compounds or CFx: for inserting or intercalating light metals
Y02E 60/10
Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation: energy storage using batteries

Secondary battery

Life of this patent

Secondary battery

Life of this patent

Abstract

Claims5