Electrochemical lithium storage properties of desert sands |
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Authors: | Chu Liang Caihong Zhou Zichong Chen Yongping Gan Yang Xia Hui Huang Xinyong Tao Jun Zhang Wenkui Zhang |
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Institution: | 1.College of Materials Science and Engineering,Zhejiang University of Technology,Hangzhou,People’s Republic of China |
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Abstract: | SiO2 is one of the most promising lithium storage materials for lithium-ion batteries anodes due to its low cost, good environmental compatibility, low working voltage, and high-specific capacity. In this work, the desert sands, which are rich in SiO2, are investigated as the anode material for lithium-ion batteries. The electrochemical activation, lithium storage capacity, and cycle properties are highly dependent on the particle size distribution of sands. As the average particle sizes of sands gradually decrease, the reversible lithium storage capacity increases from 137 mAh g?1 (several microns) to 492 mAh g?1 (several submicrons). The 72 h-milled sands (average particle size: ~1 μm) deliver a stable lithium storage capacity of ~400 mAh g?1 over 400 cycles with the capacity retention as high as 95%. The reason for the electrochemical activation, lithium storage capacity, and cycle properties of sands associated with their particle size distribution is also discussed. |
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