Artificial SEI transplantation

US10505219B2 · kind B2 · utility

Assignees

• TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC. · US
• Deakin University · AU

Inventors

• Nikhilendra Singh · Ypsilanti, US
• Timothy S. Arthur · Ann Arbor, US
• Kensuke Takechi · Ann Arbor, US
• Patrick C. Howlett · Melbourne, AU
• Maria Forsyth · Melbourne, AU
• Robert Kerr · Cockatoo, AU

Key dates

• Filing date: May 26, 2017
• Grant date: Dec 10, 2019
• Expiry date: Jan 4, 2038

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P70/50
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

An anode for a Li-ion cell, protected with an SEI by pre-treatment in an SEI-formation cell, is stable for cell cycling even in the presence of substantial water in the cell electrolyte. A method for making the protected anode includes forming an SEI on a lithium electrode by performing multiple charge/discharge cycles on the electrode in a first cell having an SEI formation electrolyte to produce the protected anode. The SEI formation electrolyte includes an ionic liquid having at least one of eight organic cations.