Research of Li-ion battery cathode materials with phenolic resin coated and prefilm modified graphite
WANG Yong-zhi
ZHAO LI
YANG Mao-ping
YANG Xu-lai
Abstract：The natural graphite with uniform spherical graphite particles was gotten through ball milling sieve processing.Carbon-coated natural graphite composite was prepared by carbonization of phenolic resin-coated natural graphite at high temperature,and the coated graphite was pre filmed with polydimethyl siloxane on the surface.X-ray diffraction (XRD),scanning electron mi-croscopy (SEM)and battery test system were used to characterize the crystal structure,mor-phology and electrochemical properties of samples.XRD results showed that phenolic was suc-cessfully coated on the surface of natural graphite because d (002 )and the disorder degree in-creased.SEM images indicated that the graphite particles was uniform and smooth,and this kind of structure made graphite surface area reduced,the electrochemical performance was improved. Electrochemical performance revealed that the capacity of compound modification graphite was 362 mAh/g at 0.1 C,coulomb efficiency was 92% for the first time.After the 100 th cycle,the capacity remained 98.6% of the highest capacity.
Keywords：Li-ion batteriesanode materialphenolic resindimethyl silicone polymergraphite
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 76-79 )