材料科学
硅
结晶度
锂(药物)
锂离子电池
化学工程
比表面积
多孔性
碳纤维
复合材料
电池(电)
冶金
化学
催化作用
有机化学
物理
工程类
内分泌学
功率(物理)
复合数
医学
量子力学
作者
Peiping Zhang,Chenxu Zhao,Weikun Ning,Shiding Miao,Nan Li,Qian Gao,Xuefa Shi
标识
DOI:10.1016/j.colsurfa.2022.128605
摘要
In order to rationally develop abundant marine clay resources, in view of its large specific surface area, looseness, high porosity, poor crystallinity, and high activity, the magnesium thermal reduction method was used to reduce Si4+ in the pelagic clay minerals to obtain porous silicon. Through targeted process design and reaction condition control, the obtained silicon material not only has higher crystallinity, but also has layered accumulation pores with relatively uniform pore size distribution. It had a BET specific surface area of 81.473 m2·g−1, a pore volume of 0.290 cm3·g−1, and an average pore size of 10.193 nm. In addition, using sucrose as the carbon source, the prepared silicon was modified to obtain a carbon-coated porous silicon material, whose performance as lithium-ion battery negative electrode was preliminarily characterized. The specific capacity, cycling performance and multiplicity performance test results showed that the porous silicon derived from pelagic clay exhibits good cycling and rate performance under the carbon coating conditions, which means that it had a certain potential in the field of lithium-ion batteries. This work opened up a new way for high value-added utilization of pelagic clay.
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