| Summary: | 博士 === 國立成功大學 === 材料科學及工程學系 === 107 === In this work, we have developed a robust, cost-effect and friendly to operators and environment process to synthesize the Si-based composite powder as negative electrode materials for lithium ion batteries (LIBs). The feature of this research includes construction of top-down method of high energy mechanical milling (HEMM) to approach nanocrystalline/amorphous Si phase with dangling bonds, wet milling to reduced size of Si aggregate powder, glucose modification to transfer function group to the surface of Si enhancing formation of solid electrolyte interface, deposition of carbon layer on HEMMed via glucose carbonization. C-coated Si powder alleviates volume expansion/contraction upon charge and discharge process Alloy designed Si/Cu3Si composite powder via mechanochemical reaction strengthens Si-based composite and enhances conductivity. Thus, Si-based composite powder as the negative electrode performs better electrochemical properties.
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