SILICON AND GRAPHENE-INCORPORATED RECHARGEABLE LI-ION BATTERIES WITH ENHANCED ENERGY DELIVERY AND CYCLING LIFE BY USING SILECON AND GRAPHENE BASED ANODE FOR ENERGY STORAGE

摘要

A silicon graphene-incorporated rechargeable Li-ion battery with enhanced energy delivery and cycling life comprising a high-performance Si/graphene composite anode, a cathode film and electrolyte is disclosed. The anode and cathode are immersed in or partially immersed in the electrolyte; wherein the anode is formed of a mixture of carbon coated Si and graphene composite with a polymer binder and a conductive additive. A method for fabricating such Si and graphene-based anode comprises the steps synthesis of carbon coated Si particles by polymer encapsulation and carbonization; enveloping the coated Si particles in graphene by mechanical agitation; formulating the carbon coated Si and graphene with a polymer binder and conductive additive; depositing the mixture onto current collectors. The anode structure affords a combination of superior rate capability, cycling life and improved volumetric capacity.

主权项

1. A silicon and graphene-incorporated rechargeable Li-ion battery with enhanced energy delivery and cycling life by using a silicon and graphene based anode, comprising a high-performance Si composite anode, a cathode film and electrolyte; the anode and the cathode film are immersed in or partially immersed in the electrolyte; wherein the anode is formed of a mixture of carbon coated Si and graphene, formulated using a polymer binder.