High energy density secondary lithium batteries

US10930969B2 · kind B2 · utility

Assignee

• UT-BATTELLE, LLC · US

Inventors

• Jagjit Nanda · Knoxville, US
• Nancy J. Dudney · Knoxville, US
• Chaitanya K. Narula · Knoxville, US
• Sreekanth Pannala · Sugar Land, US
• Raymond R. Unocic · Knoxville, US
• Surendra Kumar Martha · Knoxville, US

Key dates

• Filing date: Jan 22, 2019
• Grant date: Feb 23, 2021
• Expiry date: Jan 22, 2039

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/70
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A lithium ion battery includes a positive electrode comprising carbon fibers, a binder composition with conductive carbon, and a lithium rich composition. The lithium rich composition comprises at least one selected from the group consisting of Li1+x(My MzII MwIII)O2 where x+y+z+w=1, and where M, MII and MIII are interchangeably manganese, nickel and cobalt, and LiM*2-xMx*IIO4, where M* and M*II are manganese and nickel, respectively, with x=0.5. A negative electrode comprises carbon fibers having bound thereto silicon nanoparticles, and a mesophase pitch derived carbon binder between the silicon nanoparticles and the carbon fibers. An electrolyte is interposed between the positive electrode and the negative electrode. Methods of making positive and negative electrodes are also disclosed.