US 10,873,105 B2 · Electrode for secondary battery and lithium secondary battery including same

Abstract

Provided are an electrode for a secondary battery and a manufacturing method thereof. According to the present invention, a secondary battery, which has high capacity and is also able to get an excellent evaluation in a nail penetration test so that stability is ensured, may be manufactured. In order to accomplish the above objectives, the present invention provides an electrode for a secondary battery which includes an electrode current collector; a first electrode active material layer formed on the electrode current collector; and a second electrode active material layer formed on the first electrode active material layer, wherein a layer composed of the electrode current collector and the first electrode active material layer has a tensile strain of 1.2% or less.

Claims6

Dependent claims

An electrode for a secondary battery comprising:

an electrode current collector;
a first electrode active material layer formed on the electrode current collector;
and
a second electrode active material layer formed on the first electrode active material layer,
wherein a layer composed of the electrode current collector and the first electrode active material layer has an elongation between 0.9% and 1%,
wherein each of the first electrode active material layer and the second electrode active material layer includes a lithium-transition metal oxide as an active material, wherein the lithium-transition metal oxide is represented by Chemical Formula 1 below,
Li1+x[NiaCobMnc]1−xO2, [Chemical Formula 1]
Wherein −0.2≤x≤0.2, 0.5≤a≤0.98, 0.01≤b≤0.4, and 0.01≤c≤0.4.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application

15/768,987Filed 14 Jun 2017

Priority

KR 10-2016-007396714 Jun 2016

Published

US 2018/0301740 A118 Oct 2018

Granted

22 Dec 2020

Term ends

Not estimatedThe source records don’t support an estimate.

Classification15 codes

H01M 10/052
Accumulators with non-aqueous electrolyte: li-accumulators
H01M 4/131
Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof: electrodes based on…
H01M 4/505
Of manganese: of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525
Of nickel, cobalt or iron: of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g.…

Electrode for secondary battery and lithium secondary battery including same

Life of this patent

Electrode for secondary battery and lithium secondary battery including same

Life of this patent

Abstract

Claims6