Effect of covalently bonded polysiloxane multilayers on the electrochemical behavior of graphite electrode in lithium ion batteries |
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Authors: | Qinmin Pan Yinghua Jiang |
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Affiliation: | Department of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, PR China |
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Abstract: | Polysiloxane multilayers were covalently bonded to the surface of natural graphite particles via diazonium chemistry and silylation reaction. The as-prepared graphite exhibited excellent discharge–charge behavior as negative electrode materials in lithium ion batteries. The improvement in the electrochemical performance of the graphite electrodes was attributed to the formation of a stable and flexible passive film on their surfaces. It was also revealed that the chemical compositions of the multilayers exerted influence on the electrochemical behavior of the graphite electrodes. The result of this study presents a new strategy to the formation of elastic and strong passive film on the graphite electrode via molecular design. Owing to the diversity of polysilxoane multilayers, this method also enables researchers to control the surface chemistries of carbonaceous materials with flexibility. |
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Keywords: | Polysiloxane multilayers Covalently bonded Diazonium chemistry Silylation reaction Negative electrode Lithium ion batteries |
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