Patent ID: 9564629
Date: 2017-02-07
CPC Classifications: D01D,D01F,D04H,D06M,H01M,Y02E,Y02P

Claim:
1. A lithium secondary battery comprising a positive electrode, a negative electrode comprising a hybrid nano-filament composition which is capable of absorbing and desorbing lithium ions, and a non-aqueous electrolyte disposed between said negative electrode and said positive electrode, wherein said hybrid nano-filament composition comprises: a) An aggregate of nanometer-scaled, electrically conductive carbon filaments that are interconnected, intersected, or percolated to form a porous, electrically conductive filament network comprising interconnected pores for accommodating said non-aqueous electrolyte, wherein said nanometer-scaled, electrically conductive carbon filaments have an elongate dimension and a first transverse dimension, which is a diameter or a thickness, said first transverse dimension being less than 500 nm and an aspect ratio of said elongate dimension to said first transverse dimension greater than 10, and wherein said nanometer-scaled, electrically conductive carbon filaments are carbonized electro-spun fibers; and b) Micron- or nanometer-scaled coating that is deposited on a surface of said nanometer-scaled, electrically conductive carbon filaments, wherein said coating deposited on said nanometer-scaled, electrically conductive carbon filaments comprises an negative active material capable of absorbing and desorbing lithium ions and said coating has a thickness less than 20 μm;