Preparation and Electrochemical Performance Study on Flower-like SnO_2@G Composite Anode Material
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- 英文论文题名：Preparation and Electrochemical Performance Study on Flower-like SnO_2@G Composite Anode Material
- 论文作者：Dan Gao ; Chang Miao ; Xuemin Yan ; Wei Xiao
- 英文论文作者：Dan Gao ; Chang Miao ; Xuemin Yan ; Wei Xiao ; School of Chemistry and Environmental Engineering ; Yangtze University
- 年：2016
- 作者机构：School of Chemistry and Environmental Engineering, Yangtze University;
- 英文论文关键词：Porous flower-like structure ; SnO_2@G ; Composite anode material ; Lithium ion battery
- 会议召开时间：2016-10-14
- 会议录名称：第二届湖北省化学化工青年科学家论坛摘要集
- 语种：英文
- 分类号：TB33;TM912
- 学会代码：HXGC
- 会议名称：第二届湖北省化学化工青年科学家论坛
- 会议地点：中国湖北武汉
- 主办单位：湖北省化学化工学会
- 学会名称：《化学与生物工程》编辑部
- 页数：1
- 文件大小：738k
- 原文格式：D
- 会议级别：地方
摘要
The porous flower-like nano-structure SnO_2 powders are successfully synthesized at 160 ℃ for 12 h by hydrothermal method, and followed by being heated at 500 ℃ for 3 h to be completely oxidized. The charge-discharge tests show that the initial discharge capacity of the porous flower-like SnO_2 nanostructures is 1652.4 mAh g~(-1) and the first charge capacity is 1024.5 mAh g~(-1) with the coulomb efficiency about 62.0 % at 100 mA g~(-1). However, the discharge capacity has rapidly dropped to 635 mAh g~(-1) after 20 cycles at the same situation, which presents a poor cycle stability. To improve the cycle stability, graphene(G) is firstly prepared by hummers method, and then porous flower-like SnO_2 nanostructures are coated with G to prepare the SnO_2@G composite anode material. The G content influence on the electrochemical performance of the composite material is investigated, and the results show that the composite coated with 30 % G presents excellent electrochemical cycling performance, in which the reversible specific capacity remains 513 mAh g~(-1) after 90 cycles at a current density of 100 mA g~(-1).
The porous flower-like nano-structure SnO_2 powders are successfully synthesized at 160 ℃ for 12 h by hydrothermal method, and followed by being heated at 500 ℃ for 3 h to be completely oxidized. The charge-discharge tests show that the initial discharge capacity of the porous flower-like SnO_2 nanostructures is 1652.4 mAh g~(-1) and the first charge capacity is 1024.5 mAh g~(-1) with the coulomb efficiency about 62.0 % at 100 mA g~(-1). However, the discharge capacity has rapidly dropped to 635 mAh g~(-1) after 20 cycles at the same situation, which presents a poor cycle stability. To improve the cycle stability, graphene(G) is firstly prepared by hummers method, and then porous flower-like SnO_2 nanostructures are coated with G to prepare the SnO_2@G composite anode material. The G content influence on the electrochemical performance of the composite material is investigated, and the results show that the composite coated with 30 % G presents excellent electrochemical cycling performance, in which the reversible specific capacity remains 513 mAh g~(-1) after 90 cycles at a current density of 100 mA g~(-1).
The porous flower-like nano-structure SnO_2 powders are successfully synthesized at 160 ℃ for 12 h by hydrothermal method, and followed by being heated at 500 ℃ for 3 h to be completely oxidized. The charge-discharge tests show that the initial discharge capacity of the porous flower-like SnO_2 nanostructures is 1652.4 mAh g~(-1) and the first charge capacity is 1024.5 mAh g~(-1) with the coulomb efficiency about 62.0 % at 100 mA g~(-1). However, the discharge capacity has rapidly dropped to 635 mAh g~(-1) after 20 cycles at the same situation, which presents a poor cycle stability. To improve the cycle stability, graphene(G) is firstly prepared by hummers method, and then porous flower-like SnO_2 nanostructures are coated with G to prepare the SnO_2@G composite anode material. The G content influence on the electrochemical performance of the composite material is investigated, and the results show that the composite coated with 30 % G presents excellent electrochemical cycling performance, in which the reversible specific capacity remains 513 mAh g~(-1) after 90 cycles at a current density of 100 mA g~(-1).
引文
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[2]Lin J,Peng Z,Xiang C,et al.Graphene nanoribbon and nanostructured SnO_2 composite anodes for lithium ion batteries[J].ACS Nano,2013,7(7):6001-6006.
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