High-capacity positive electrode active material

US10957901B2 · kind B2 · utility

Assignee

• Massachusetts Institute of Technology · US

Inventors

• Gerbrand Ceder · Wellesley, US
• Jinhyuk Lee · Cambridge, US
• Alexander Urban · Somerville, US
• Xin Li · Shanghai, CN
• Sangtae Kim · Seoul, KR
• Geoffroy Hautier · Woluwe-Saint-Pierre - Sint-Pieters-Woluwe, BE

Key dates

• Filing date: Aug 30, 2017
• Grant date: Mar 23, 2021
• Expiry date: Aug 30, 2037

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/10
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

This disclosure provides a positive electrode active lithium-excess metal oxide with composition LixMyO2 (0.6≤y≤0.85 and 0≤x+y≤2) for a lithium secondary battery with a high reversible capacity that is insensitive with respect to cation-disorder. The material exhibits a high capacity without the requirement of overcharge during the first cycles.