US 2015/0104707 A1 · CATHODE MATERIAL COMPOSITE HAVING IMPROVED CONDUCTIVITY, CATHODE AND ELECTROCHEMICAL DEVICE HAVING THE SAME

Abstract

The present disclosure refers to a cathode material composite having improved conductivity, and a cathode and electrochemical device having the cathode material composite. In accordance with one embodiment of the present disclosure, a conductive polymer is positioned on the surface of a shell present in the form of a tetragonal structure in the lithium manganese oxide, thereby enhancing electrical conductivity to be highly involved in reaction around 3V, and providing a conductive path to improve the capacity, life and rate characteristics of an electrochemical device.

Claims10

Dependent claims

A cathode material composite comprising a spinel-structured lithium manganese oxide whose crystal structure is a core-shell structure induced by phase transition of a cubic structure into a tetragonal structure from the surface of particles to the center thereof during discharging up to between 2.5 and 3.5 V,

wherein the cathode material composite further comprises a conductive material, a polymer binder, a conductive polymer on the surface of the shell having the tetragonal structure formed by the phase transition in the discharging process.

Dependencies are inferred from the claim text.

Facts

Application

14/574,942Filed 18 Dec 2014

Priority

KR 10-2013-00783834 Jul 2013

Published

16 Apr 2015

Term ends

Not estimatedThe source records don’t support an estimate.

Classification21 codes

H01M 4/1315
Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx: containing halogen atoms, e.g. LiCoOxFy
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.…

Cathode material composite having improved conductivity, cathode and electrochemical device having the same

Life of this patent

Cathode material composite having improved conductivity, cathode and electrochemical device having the same

Life of this patent

Abstract

Claims10