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 ; Wei Xiao
- 英文论文作者：Dan Gao ; Chang Miao ; 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：2016-09-23
- 会议录名称：中部四省化学化工学会2016年学术年会摘要集
- 语种：英文
- 分类号：O646.5
- 学会代码：JXHX
- 会议名称：中部四省化学化工学会2016年学术年会
- 会议地点：中国江西南昌
- 主办单位：中国化学会湖北代表处
- 学会名称：江西省化学化工学会
- 页数：1
- 文件大小：104k
- 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 3h to be completely oxidized,which are confirmed by XRD and SEM.The charge and discharge tests show that the initial discharge capacity of the porous flower-like SnO_2 nanostructures is 1652.4 mA h g~(-1) and the first charge capacity is 1024.5 mA h g~(-1) with the initial coulomb efficiency about 62.0 % at the charge-discharge current density of 100 mA g~(-1).However,the discharge capacity has rapidly dropped to 635 mA h 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 composite formed under the optimal condition is also investigated in term of battery properties.The results show that the composite coated with 30 % G presents excellent electrochemical cycling performance,in which the reversible specific capacity remains 513 mA h 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 3h to be completely oxidized,which are confirmed by XRD and SEM.The charge and discharge tests show that the initial discharge capacity of the porous flower-like SnO_2 nanostructures is 1652.4 mA h g~(-1) and the first charge capacity is 1024.5 mA h g~(-1) with the initial coulomb efficiency about 62.0 % at the charge-discharge current density of 100 mA g~(-1).However,the discharge capacity has rapidly dropped to 635 mA h 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 composite formed under the optimal condition is also investigated in term of battery properties.The results show that the composite coated with 30 % G presents excellent electrochemical cycling performance,in which the reversible specific capacity remains 513 mA h 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 3h to be completely oxidized,which are confirmed by XRD and SEM.The charge and discharge tests show that the initial discharge capacity of the porous flower-like SnO_2 nanostructures is 1652.4 mA h g~(-1) and the first charge capacity is 1024.5 mA h g~(-1) with the initial coulomb efficiency about 62.0 % at the charge-discharge current density of 100 mA g~(-1).However,the discharge capacity has rapidly dropped to 635 mA h 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 composite formed under the optimal condition is also investigated in term of battery properties.The results show that the composite coated with 30 % G presents excellent electrochemical cycling performance,in which the reversible specific capacity remains 513 mA h g~(-1) after 90 cycles at a current density of 100 mA g~(-1).
引文
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[6]Wang L,Wang D,Dong Z,et al.Interface chemistry engineering for stable cycling of reduced GO/SnO_2 nanocomposites for lithium ion battery[J].Nano Letters,2013,13(4):1711-1716.
[2]Wang H,Liang Q,Wang W,et al.Preparation of flower-like SnO_2 nanostructures and their applications in gas-sensing and lithium storage[J].Crystal Growth&Design,2011,11(7):2942-2947.
[3]Zou Y,Wang Y.Microwave solvothermal synthesis of flower-like Sn S2 and SnO_2 nanostructures as high-rate anodes for lithium ion batteries[J].Chemical Engineering Journal,2013,229:183-189.
[4]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.
[5]Yang S,Yue W,Zhu J,et al.Graphene-based mesoporous SnO_2 with enhanced electrochemical performance for Lithium-ion batteries[J].Advanced Functional Materials,2013,23(28):3570-3576.
[6]Wang L,Wang D,Dong Z,et al.Interface chemistry engineering for stable cycling of reduced GO/SnO_2 nanocomposites for lithium ion battery[J].Nano Letters,2013,13(4):1711-1716.