Patent · US Active

Conducting formation cycles

US8801810B1 · kind B1 · utility

14Cited by

1References

16Claims

0Family size

Assignee

Amprius, Inc. · US

Inventors

Yi Cui · Stanford, US
Eugene Berdichevsky · Oakland, US
Graeme R. Hoste · Menlo Park, US
Rainer Fasching · Mill Valley, US
Song Han · Foster City, US
Mark C. Platshon · Menlo Park, US

Key dates

Filing date	Nov 11, 2010
Grant date	Aug 12, 2014
Priority date	—
Expiry date	Apr 13, 2033

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49108
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Provided are methods of preparing a lithium ion cell including forming the cell by charging the lithium ion cell to at least about 5% or, more specifically, to at least about 20% of the theoretical capacity of the negative electrode electrochemically active material, holding the lithium ion cell in a charged state for at least about 0.5 hours, and discharging the lithium ion cell. Holding the lithium ion cell in a partially charged state is believed to significantly improve its Coulombic efficiency during subsequent cycling.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.