Application of chemical vapor deposition to silicon/carbon anodes for lithium-ion batteries
Among the many anode materials for lithium-ion batteries,silicon is regarded as the most promising anode for next-generation high-energy-density batteries owing to its ultrahigh theoretical capacity(4 200 mA·h·g-1).However,the drastic volume changes of silicon-based anode materials during cycling greatly limit theirs eletrochemical performance and inhibit its practical applications.It has been shown that silicon/carbon composite anode materials can effciciently mitigate the volume expansion of silicon and contributed to enhanced conductivity,thus improving the stability of silicon-based anodes and the cycle life of the battery.However,achieving industrial production with high stability remains a great challenge.Chemical vapor deposition(CVD)has been widely used in the preparation of silicon/carbon anode materials owing to its high-quality deposition and simple process.In this review,application of CVD in silicon/carbon anodes for lithium-ion batteries was summarized from three aspects:deposited carbon,deposited silicon and deposited silicon/carbon.The synthesis methods of silicon/carbon composite anode materials and their respective advantages and disadvantages were elucidated.Finally,the development trend and application outlook of silicon-based anodes were provided.
silicon/carbon anodeschemical vapor depositionlithium-ion batteriessilicon-based anodeselectrochemical performancesiliconanode material
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