US 9,958,508 B2 · Degraded performance recovery method for lithium ion secondary battery

Abstract

Provided is a method by which the degraded performance of a lithium ion secondary battery containing phosphorus atoms (P) in a nonaqueous electrolytic solution can be restored by subjecting the lithium ion secondary battery in which a coating film including P is formed on a positive electrode surface, to a comparatively simple treatment. The degraded performance recovery method for a lithium ion secondary battery disclosed herein includes an ultrasound treatment step of applying ultrasound to the lithium ion secondary battery. In the ultrasound treatment step, the frequency of the generated ultrasound is 900 kHz or higher, and the period of time in which the ultrasound is applied to the lithium ion secondary battery continuously is 5 min or more.

Claims4

Dependent claims

A degraded performance recovery method for a lithium ion secondary battery including an electrode body having a positive electrode and a negative electrode and a nonaqueous electrolytic solution including phosphorus atoms (P),

the method comprising:
an ultrasound treatment step of applying ultrasound to the lithium ion secondary battery, wherein
in the ultrasound treatment step, the frequency of the generated ultrasound is 900 kHz or higher, and
a period of time in which the ultrasound is applied to the lithium ion secondary battery continuously is 5 min or more.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

15/225,929Filed 2 Aug 2016

Priority

JP 2015-1540774 Aug 2015

Published

US 2017/0040651 A19 Feb 2017

Granted

1 May 2018

Term ends

Not estimatedThe source records don’t support an estimate.

Classification12 codes

G01R 31/389
Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of…
H01M 10/0525
Li-accumulators: rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
G01R 31/392
Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of…
H01M 10/48
Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells: accumulators combined with arrangements for…

Degraded performance recovery method for lithium ion secondary battery

Life of this patent

Degraded performance recovery method for lithium ion secondary battery

Life of this patent

Abstract

Claims4