Direct electrodeposition of ionic liquid-based template-free Sn Co alloy nanowires as an anode for Li-ion batteries
来源期刊：International Journal of Minerals Metallurgy and Materials2018年第9期
论文作者：Le-ping Wang Gang Chen Qi-xin Shen Guo-min Li Shi-you Guan Bing Li
文章页码：1027 - 1034
摘 要：Sn Co alloy nanowires were successfully electrodeposited from Sn Cl2-Co Cl2-1-ethyl-3-methylimidazolium chloride（EMIC） ionic liquid without a template. The nanowires were obtained from the molar ratio of 5:40:60 for Sn Cl2（25）Co Cl2（25）EMIC at-0.55 V and showed a minimum diameter of about 50 nm and lengths of over 20 μm. The as-fabricated SnCo nanowires were about 70 nm in diameter and featured a Sn/Co weight ratio of 3.85:1, when used as an anode for a Li-ion battery, they presented respective specific capacities of 687 and 678 m Ah·g-1 after the first charge and discharge cycle and maintained capacities of about 654 m Ah·g-1 after 60 cycles and 539 m Ah·g-1 after 80 cycles at a current density of 300 m A·g-1. Both the nanowire structure and presence of elemental Co helped buffer large volume changes in the Sn anode during charging and discharging to a certain extent, thereby improving the cycling performance of the Sn anode.
Le-ping Wang1，Gang Chen1，Qi-xin Shen1，Guo-min Li1，Shi-you Guan2，Bing Li1
1. School of Materials science and Engineering, East China University of Science and Technology2. Institute for Sustainable Energy, Shanghai University
摘 要：Sn Co alloy nanowires were successfully electrodeposited from Sn Cl2-Co Cl2-1-ethyl-3-methylimidazolium chloride（EMIC） ionic liquid without a template. The nanowires were obtained from the molar ratio of 5:40:60 for Sn Cl2（25）Co Cl2（25）EMIC at-0.55 V and showed a minimum diameter of about 50 nm and lengths of over 20 μm. The as-fabricated SnCo nanowires were about 70 nm in diameter and featured a Sn/Co weight ratio of 3.85:1, when used as an anode for a Li-ion battery, they presented respective specific capacities of 687 and 678 m Ah·g-1 after the first charge and discharge cycle and maintained capacities of about 654 m Ah·g-1 after 60 cycles and 539 m Ah·g-1 after 80 cycles at a current density of 300 m A·g-1. Both the nanowire structure and presence of elemental Co helped buffer large volume changes in the Sn anode during charging and discharging to a certain extent, thereby improving the cycling performance of the Sn anode.
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