The Research Of SnO₂/C Composite As Anode Materials For Lithium-ion Battery

Graphite has been widely used as anode material for lithium ion batteries, but its theoretical storage capacity limit its application in high-performance lithium-ion battery.As a new anode material for lithium ion battery, Tin-based material which exhibited high theoretical capacity has attracted much attention.However,a major obstacle to the use of tin as an active material is large volume expansion-contraction that accompanies the lithium alloying-dealloying process.These volume variations result in severing mechanical strains which leads to severe degradation of the anode upon cycling and dramatically shortens the cycle life of the electrode.In the paper,we tried two steps to improve the cycling performance.Firstly, the use of carbon fiber structure in filter paper can provide inhibition of the volume change.Secondly,carbon fiber coated nano-tin oxide particles to provide high capacity.This test method is simple and has good repeatability. As a lithium ion battery electrode materials with high initial capacity, cycle efficiency, but the cycle stability is not ideal, recycling capacity fade quickly, but need further improvement.