收稿日期: 2016-01-15
网络出版日期: 2016-04-30
基金资助
国家自然科学基金资助项目(11375111, 11428410)；教育部博士点基金资助项目(20133108110021)
Preparation and properties of Ni-doped SnO2 nanospheres for lithium-ion battery anode materials
Received date: 2016-01-15
Online published: 2016-04-30
利用简单的一步水热法制备高性能的镍掺杂SnO2 纳米微球锂离子电池负极材料. 利用扫描电镜(scanning electron microscope, SEM)、高分辨率透射电镜(high resolution transmission electron microscope, HRTEM)、拉曼分析仪、X射线衍射(X-ray diffraction, XRD)仪以及电化学性能测试仪器(如蓝电测试系统、电化学工作站)分别研究了镍掺杂对SnO2 微观形貌、组成、结晶行为及电化学性能的影响, 并得到了最佳反应时间. 实验结果表明：与纯SnO2相比, 镍掺杂SnO2 纳米微球表现出了更好的倍率性能和优异的循环性能. 特别地, 反应时间为12 h 的5 % 镍掺杂SnO2 在100 mA/g 电流密度下的首次放电比容量为1 970.3 mA·h/g,远高于SnO2 的理论容量782 mA·h/g. 这是因为镍掺杂可适应庞大的体积膨胀, 避免了纳米粒子的团聚, 因此其电化学性能得到了显著改善.
苗纯杰, 胡志翔, 任兰兰, 郜子明, 董敬余, 李琦, 罗志刚, 陈志文 . 镍掺杂SnO2纳米微球锂离子电池负极材料的制备及其性能[J]. 上海大学学报(自然科学版), 2016 , 22(2) : 239 -244 . DOI: 10.3969/j.issn.1007-2861.2015.05.020
Ni-doped SnO2 nanospheres were synthesized with a facile one-step hydrothermal method as a high-performance anode material for lithium-ion batteries. Scanning electron microscope (SEM), high resolution transmission electron microscope (HRTEM), Raman analyzer, X-ray diffraction (XRD) and electrochemical performance testing equipment such as blue electrical test systems and electrochemical workstation were used to investigate morphology, composition, crystallization behavior and electrochemical properties of Ni-doped SnO2 and find the best doping reaction time. It has been found that the appropriate Ni-doped SnO2 nanospheres showed much better rate capability and excellent cycling performance compared with the pristine SnO2. In particular, the sample of 5% Ni-doped SnO2 whose reaction time was 12 h showed a high initial discharge capacity of 1 970.3 mA·h/g at a current density of 100 mA/g, far higher than the theoretical capacity of SnO2 of 782 mA·h/g. This was because Ni-doping could accommodate huge volume expansion and avoid agglomeration of nanoparticles. Thus, the electrochemical performance of Ni-doped SnO2 nanospheres was significantly improved.
Key words： anode material; lithium-ion battery; Ni-doped SnO2
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