期刊
JOURNAL OF POROUS MATERIALS
卷 29, 期 4, 页码 1191-1198出版社
SPRINGER
DOI: 10.1007/s10934-022-01243-z
关键词
Silicon monoxide; Porous carbon; Anode; Lithium-ion battery
资金
- National Natural Science Foundation of China (NSFC) [11874282, 11604245, 11981240429]
- Six Talent Peaks Project in Jiangsu Province [2019-XNY-074]
- Vice President Project of Industry-University-Research Cooperation in Science and Technology of Jiangsu Province [BY2020675]
- Young and middle-aged academic leader of Qinglan Project of universities in Jiangsu Province [2021]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX21_3472]
This study proposes a new strategy for the preparation of SiO and porous carbon composite by freeze-drying, which exhibits high capacity and retention rate, and excellent electrochemical performance.
Silicon monoxide (SiO) shows great potential for application as anode materials for lithium-ion batteries on account of its large capacity, low-cost, ample reserves and environmental amity, but serious capacity reduction and low lithium-ion transfer rate during charging and discharging restrict its development. In this work, a new strategy for the preparation of SiO and Porous carbon (Pc) composite by freeze-drying is proposed. A firm and conjoint SiO@Pc framework provides adequate transmission channels for lithium ions and sufficient number of pores to allow electrolyte penetration. The fabricated SiO@ Pc composite anode material delivers high capacity of 1020 mAh g(-1)- with similar to 80% capacity retention rate after 200 cycles. It also exhibits excellent rate performance, providing 634 mAh g(-1)- capacity remaining at a current density of 1000 mA In addition, the optimized lithium-ion kinetics were further revealed by electrochemical impedance spectroscopy and cyclic voltammetry. Our approach uses environmental amity and low-cost materials to provide new ideas for making high-performance energy devices through simple and doable preparation process.
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