US 10,637,064 B2 · Method for manufacturing conductor, conductor manufactured thereby and lithium secondary battery including the same

Abstract

The present invention relates to a method for manufacturing a conductor, and a lithium secondary battery including a conductor manufactured using the manufacturing method, and the method for manufacturing a conductor includes removing metal impurities in a conductor by irradiating microwave on the conductor including the metal impurities and converting the metal impurities into metal oxides. A conductor manufactured using the manufacturing method converts metal impurities included in the conductor to metal oxides that are inactive at a battery operating voltage and not eluted in an electrolyte liquid, and therefore, is capable of enhancing battery performance properties, particularly, capacity and lifespan properties without concern of metal impurity elution and a defect occurrence under a low pressure caused therefrom.

Claims17

Dependent claims

A method for manufacturing a conductor comprising:

removing a metal impurity in the conductor via microwave irradiation of the conductor including the metal impurity and converting the metal impurity into an oxide of metal impurity,
wherein the conductor is a carbon-based material, wherein the carbon-based material is carbon black, acetylene black, Ketjen black, channel black, furnace black, lamp black, thermal black, denca black, super P, super C, carbon fiber, a carbon nanotube or activated carbon, and
wherein, after the microwave irradiation, the conductor includes the metal impurity and the oxide of the metal impurity in a weight ratio of 0:100 to 0.5:99.5.

Dependencies are inferred from the claim text.

Facts

Application

15/503,251Filed 22 Oct 2015

Priority

KR 10-2014-01512733 Nov 2014

Published

US 2017/0237073 A117 Aug 2017

Granted

28 Apr 2020

Term ends

Not estimatedThe source records don’t support an estimate.

Classification22 codes

H01M 4/625
Electric conductive fillers: carbon or graphite
B01J 19/126
Incoherent waves: microwaves
C01B 32/05
Carbon; Compounds thereof: preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30
H01M 4/505
Of manganese: of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy

Method for manufacturing conductor, conductor manufactured thereby and lithium secondary battery including the same

Life of this patent

Method for manufacturing conductor, conductor manufactured thereby and lithium secondary battery including the same

Life of this patent

Abstract

Claims17