Mesoporous Amorphous Silicon: A Simple Synthesis of a High-Rate and Long-Life Anode Material for Lithium-Ion Batteries

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• 作者：Liangdong Lin ; Xuena Xu ; Chenxiao Chu ; Muhammad K. Majeed and Prof. Jian Yang
• 刊名：Angewandte Chemie
• 出版年：2016
• 出版时间：November 2, 2016
• 年：2016
• 卷：128
• 期：45
• 页码：14269-14272
• 全文大小：3577K
• ISSN：1521-3757

文摘

Amorphous Si (a-Si) shows potential advantages over crystalline Si (c-Si) in lithium-ion batteries, owing to its high lithiation potential and good tolerance to intrinsic strain/stress. Herein, porous a-Si has been synthesized by a simple process, without the uses of dangerous or expensive reagents, sophisticated equipment, and strong acids that potential cause environment risks. These porous a-Si particles exhibit excellent electrochemical performances, owing to their porous structure, amorphous nature, and surface modification. They deliver a capacity of 1025 mAh g⁻¹ at 3 A g⁻¹ after 700 cycles. Moreover, the reversible capacity after electrochemical activation, is quite stable throughout the cycling, resulting in a capacity retention about around 88 %. The direct comparison between a-Si and c-Si anodes clearly supports the advantages of a-Si in lithium-ion batteries.