Method for preparing silicon-carbon anode material for lithium ion power battery

• Main Authors: HUANG XUANNING, DING BO, SONG GUANGSHENG, LI WANYUN, MA YANGZHOU
• Format: Patent
• Language: Chinese; English
• Published: 26.04.2019
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses a method for preparing a silicon-carbon anode material for a lithium ion power battery and belongs to the technical field of lithium ion battery electrode material preparation.The method comprises the following specific steps: the first step is ball milling reduction of silicon oxide, wherein reduction of the silicon oxide part is carried out by utilizing the activity of magnesium powder, and residual magnesium and magnesium oxide can be used as a buffer material to exist in an electrode; the second step is hydrothermal reaction, wherein the composite material obtainedby ball milling is subject to compounding-coating treatment by the hydrothermal reaction of a glucose aqueous solution; the third step is carbonization reaction under atmosphere protection to realizethe compounding of the silicon-carbon material. The selected raw materials are simple, the process is easy to achieve, acid washing is not needed and poison is avoided in the synthesis, the method isgreen and environmentally f