Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 554, Issue -, Pages 674-681Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2019.07.043
Keywords
Porous silicon; Different proportion; Chemical dealloying; Lithium-ion batteries; Anode material
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Funding
- Taishan Scholars Program of Shandong Province [tsqn201812002]
- Project of the Taishan Scholar [ts201511004]
- State Key Program of National Natural Science of China [61633015]
- Shandong Provincial Natural Science Foundation (China) [ZR2017MB001]
- Young Scholars Program of Shandong University [2016WLJH03]
- Shandong Provincial Science and Technology Key Project [2018GGX104002]
- Independent Innovation Foundation of Shandong University
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Silicon is regarded as the most promising electrode material to meet the high-capacity demand for lithium-ion batteries (LIBs). Nevertheless, the large volume expansion during charging/discharging process restricts its practical application. In this report, a facile chemical dealloying method is conducted to prepare porous silicon materials from Al-Si alloys with different proportions at ambient temperature. The porosity of anode materials could buffer the huge volume change of Si anode and enhance the ion transport. Finally, the optimized Si20 sample delivers a capacity of 1662 mAh g(-1) after 145 cycles at 500 mA g(-1) and a high rate capability up to 908 mAh g(-1) at 5000 mA g(-1). (C) 2019 Elsevier Inc. All rights reserved.
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