| 中空硅纳米球锂离子电池负极材料的制备及电化学性能 |
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| 引用本文： | 丁昂,张钟元,程厅,董星龙. 中空硅纳米球锂离子电池负极材料的制备及电化学性能[J]. 材料导报, 2018, 32(11): 1791-1794. DOI: 10.11896/j.issn.1005-023X.2018.11.004 |
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| 作者姓名： | 丁昂 张钟元 程厅 董星龙 |
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| 作者单位： | 大连理工大学材料科学与工程学院,大连 116024;中国兵器科学研究院宁波分院,宁波 315104大连理工大学材料科学与工程学院,大连,116024 |
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| 基金项目： | 国家自然科学基金(51331006 |
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| 摘 要： | 采用直流电弧等离子体蒸发法原位合成了Si-Al纳米颗粒(Si-AlNPs),获得了由晶体Si包覆单晶金属Al核的纳米胶囊结构。通过化学酸洗处理去除Al核制备出中空结构的Si纳米球(Si HNSs),并将其作为锂离子电池的负极材料,研究了电极的循环和倍率电化学性能。与Si-AlNPs电极相比,Si HNSs电极的循环稳定性及倍率性能都显著提高,这源于中空结构的Si纳米球为嵌/脱锂过程中的体积变化提供了有效缓冲空间,同时也为锂离子迁移提供了更多通道。
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| 关 键 词： | 中空结构 Si-Al纳米粒子 锂离子电池 Si负极 直流电弧等离子体 hollow structure Si-Al nanoparticle lithium-ion battery Si anode DC arc-discharge plasma |
Synthesis of Hollow Si Nanospheres and Its Electrochemical Performances as Anode Material for Lithium-ion Batteries |
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| DING Ang,ZHANG Zhongyuan,CHENG Ting and DONG Xinglong. Synthesis of Hollow Si Nanospheres and Its Electrochemical Performances as Anode Material for Lithium-ion Batteries[J]. Materials Review, 2018, 32(11): 1791-1794. DOI: 10.11896/j.issn.1005-023X.2018.11.004 |
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| Authors: | DING Ang ZHANG Zhongyuan CHENG Ting DONG Xinglong |
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| Affiliation: | School of Materials Science and Engineering, Dalian University of Technology, Dalin 116024;Ningbo Branch of China Academy of Ordnance Science, Ningbo 315103,School of Materials Science and Engineering, Dalian University of Technology, Dalin 116024,School of Materials Science and Engineering, Dalian University of Technology, Dalin 116024 and School of Materials Science and Engineering, Dalian University of Technology, Dalin 116024 |
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| Abstract: | Si-Al nanoparticles (Si-Al NPs)possessed the nanocapsule structure with crystal Si shell and monocrystal Al core were prepared by DC arc-discharge plasma method.The hollow Si nanospheres (Si HNSs)were successfully obtained by subsequent-ly removing the Al component from Si-Al NPs through acid pickling process.Both of Si-Al NPs and Si HNSs were investigated as the anode materials for lithium ion battery.The results indicated that electrochemical performances of Si HNSs electrode had been greatly improved compared with Si-Al NPs electrode,because the hollow space in Si nanosphere could provide an effective buffer space for volume change during the intercalation/deintercalation of lithium ions and supplies more migration channels for lithium ions. |
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| Keywords: | hollow structure Si-Al nanoparticle lithium-ion battery Si anode DC arc-discharge plasma |
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