Method for manufacturing electrode for secondary battery suitable for long life

Patent metadata

Field	Value
Publication number	US-10790499-B2
Application number	US-201816321963-A
Country	US
Kind code	B2
Filing date	Jan 11, 2018
Priority date	Feb 7, 2017
Publication date	Sep 29, 2020
Grant date	Sep 29, 2020

Abstract

The present disclosure provides a method for manufacturing an electrode having hollow carbon nanoparticles by mixing an electrode active material, a conductive material, a binder to produce a conventional electrode slurry, mixing with selenium-carbon particles, coating an electrode slurry, vaporizing selenium nanoparticles when drying in order to decrease the amount of conductive material in an electrode having long sustainability. The method for manufacturing an electrode for a secondary battery may be include; dispersing or dissolving a binder in a solvent to prepare a binder solution; preparing an electrode slurry by mixing the binder solution with an electrode material including an electrode active material, a conductive material, and selenium-carbon particles; coating the electrode slurry on a current collector to form a coating layer; and drying the coating the coating layer to vaporize amorphous selenium nanoparticles among the selenium-carbon particles and thereby forming hollow carbon nanoparticles in the coating layer.

First claim

The invention claimed is:

1. A method for manufacturing an electrode for a secondary battery, comprising:
dispersing or dissolving a binder in a solvent to prepare a binder solution;
preparing an electrode slurry by mixing the binder solution with an electrode material including an electrode active material, a conductive material, and selenium-carbon particles;
coating the electrode slurry on a current collector to form a coating layer;
drying the coating layer to vaporize amorphous selenium nanoparticles among the selenium-carbon particles and thereby forming hollow carbon nanoparticles in the coating layer.

2. The method of claim 1 , wherein the selenium-carbon particles have a structure in which a core is selenium and a shell is carbon.

3. The method of claim 1 , wherein the amorphous selenium nanoparticles is vaporized at a temperature of from 90 to 110° C.

4. The method of claim 1 , wherein a size of the hollow carbon nanoparticles is in a range of from 30 to 300 nm.

Assignees

• Lg Chemical Ltd

Inventors

• Lee Young Hwan

Classifications

• H01M4/0404 Primary

  by coating on electrode collectors · CPC title

• H01M10/0565

  Polymeric materials, e.g. gel-type or solid-type · CPC title

• H01M50/204

  Racks, modules or packs for multiple batteries or multiple cells · CPC title

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title

• H01M4/0471

  involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis · CPC title