期刊
ENERGY & FUELS
卷 36, 期 7, 页码 4034-4041出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.energyfuels.2c00207
关键词
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资金
- Research Grant Council of Hong Kong [N_PolyU531/18]
- Hong Kong Polytechnic University (ZVRP)
- Research Foundation for Distinguished Scholars of Qingdao Agricultural University [665-1119008]
- Key Laboratory of High Efficiency Electrochemical Energy Storage Technology [EEST2020-1]
Ultra-small SnO2 nanoparticle-embedded polyvinyl alcohol-derived carbon prepared by a simple co-precipitation method exhibits excellent performance in lithium-ion batteries, attributed to the confinement effect of the amorphous carbon shell and the role of conductive agent.
Stannic oxide has been considered as an ideal anode electrode in lithium-ion batteries (LiBs) due to its high theoretical capacity but is restricted by its inferior reaction kinetics. Herein, we have proposed ultra-small SnO2 nanoparticle-embedded polyvinyl alcohol (PVA)-derived carbon via a simple co-precipitation method. The size of SnO2 nanoparticles can be tuned by controlling the proportion between the Sn precursor and PVA. As an anode for the LiB, SnO2@C4 showed excellent rate and stability performance compared to pure SnO2 and other contrast electrodes. The excellent battery performance of SnO2@C4 is mainly ascribed to the confinement effect of the amorphous carbon shell, which acts as an elastic layer to restrain the volume expansion of SnO2 nanoparticles and a conductive agent to facilitate the electron transfer and optimize the reaction kinetics. The synthetic strategy of the SnO2@C composite material can be easily scalable, which shows its potential value in the practical renewable energy and fuel industry.
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