Hydrothermal synthesis of hollow SnO2 spheres with excellent electrochemical performance for anodes in lithium ion batteries
Hydrothermal synthesis of hollow SnO2 spheres with excellent electrochemical performance for anodes in lithium ion batteries
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DOI：
10.1016/j.materresbull.2017.03.004
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发表时间：
2017-12-01
影响因子：
5.4
通讯作者：
Lin, Zhiqun
中科院分区：
文献类型：
--
作者：
Liu, Ruiping;Su, Weiming;Lin, Zhiqun
以NaF为形貌控制剂，采用一步水热法合成了具有定向锥形SnO 2纳米粒子壳层的SnO 2空心球。所得中空SnO 2球电极表现出高的可逆容量（在0.1C和1C下的初始充电和放电容量分别为1342.9和1947.6mAh/g以及1235.4和1741.3mAh/g）和良好的循环稳定性（在0.1C和1C下100次循环后的放电容量分别保持为758.1和449.6mAh/g）。还获得了良好的倍率性能（0.1C下1234.5mAh/g，0.2C下884.2mAh/g，0.5C下692.4mAh/g，1C下497.6mAh/g，2C下315.8mAh/g和5C下80.6mAh/g，更重要的是，当电流密度回到0.1C时，容量可恢复到869.6mAh/g。所观察到的电化学性能可以归因于中空结构、用于形态控制的NaF的使用以及颗粒的独特取向的锥形壳。(C)2017爱思唯尔有限公司版权所有
Hollow SnO2 spheres with oriented cone-like SnO2 nanoparticle shells were synthesized by a one-step hydrothermal process using NaF as the morphology controlling agent. The resulting hollow SnO2 sphere electrode exhibits high reversible capacity (initial charge and discharge capacities of 1342.9 and 1947.6 mAh/g at 0.1 C and 1235.4 and 1741.3 mAh/g at 1 C) and good cycling stability (discharge capacities maintained 758.1 and 449.6 mAh/g after 100 cycles at 0.1 C and 1 C, respectively). Good rate performance was also obtained (1234.5 mAh/g at 0.1 C, 884.2 mAh/g at 0.2 C, 692.4 mAh/g at 0.5 C, 497.6 mAh/g at 1 C, 315.8 mAh/g at 2 C and 80.6 mAh/g at 5 C, and more importantly, when the current density returns to 0.1 C, a capacity of 869.6 mAh/g can be recovered. The observed electrochemical performance can attributed to the hollow structure, the use of NaF for morphology control and the unique oriented cone like shell of the particles. (C) 2017 Elsevier Ltd. All rights reserved.