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AssigneeGuangdong Kaijin New Energy Technology Co., Ltd.
InventorsAnhua ZHENG, Dexin YU, Rusheng FU, Yunlin YANG
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A long-cycle and low-expansion silicon-carbon composite material with an internal pore structure includes a silicon source, a closed pore, a filling layer and a carbon coating layer. The closed pore is a large closed pore or composed of a plurality of small closed pores and the filling layer is a carbon filling layer. The invention provides a long-cycle and low-expansion silicon-carbon composite material with an internal pore structure which is reduced in volume expansion effect and improved in volume effect of cycle performance. The invention further provides a preparation method and application of a long-cycle and low-expansion silicon-carbon composite material with an internal pore structure. The process is simple. The volume expansion effect being reduced and the cycle performance being improved are of great significance to the application of silicon-based materials in lithium-ion batteries.
A silicon-carbon composite material with an internal pore structure, consisting of a silicon source, a closed pore, a filling layer and a carbon coating layer, wherein the closed pore is a large closed pore or composed of a plurality of small closed pores, and the filling layer is a carbon filling layer filled among particles of the silicon source, and the carbon coating layer encloses the silicon source, the closed pore and the filling layer therein.
A preparation method of a silicon-carbon composite material with an internal pore structure, comprising the following steps:
Dependencies are inferred from the claim text.