Positive electrode active materials with composite coatings for high energy density secondary batteries and corresponding processes

USRE49980E1 · kind E1 · reissue

Assignee

• Ionblox, Inc. · US

Inventors

• Sanjeev Sharma · Herndon, US
• Deepak Kumaar Kandasamy Karthikeyan · Union City, US
• Charles A. Bowling · Palo Alto, US
• Bing Li · West Lafayette, US
• Pedro A. Hernández Gallegos · Pleasanton, US
• Subramanian Venkatachalam · Pleasanton, US
• Herman A. Lopez · San Jose, US
• Sujeet Kumar · Fremont, US

Key dates

• Filing date: Jan 22, 2021
• Grant date: May 21, 2024
• Expiry date: Jan 22, 2041

Classification

• Technology area (CPC —): General

Abstract

A composite coated form of lithium cobalt oxide is described that can achieve improved cycling at higher voltages. Liquid phase and combined liquid and solid phase coating processes are described to effectively form the composite coated powders. The improved cycling positive electrode materials can be effectively combined with either graphitic carbon negative electrode active materials or silicon based high capacity negative electrode active materials. Improved battery designs can achieve very high volumetric energy densities in practical battery formats and with reasonable cycling properties.