SnO2/graphene composite as highly reversible anode materials for lithium ion batteries
SnO2/graphene composite as highly reversible anode materials for lithium ion batteries
复制标题
DOI：
10.1016/j.jpowsour.2013.03.116
复制
发表时间：
2013-10
影响因子：
9.2
通讯作者：
Qi Guo;Z. Zheng;Haili Gao;Jia Ma;X. Qin
中科院分区：
文献类型：
--
作者：
Qi Guo;Z. Zheng;Haili Gao;Jia Ma;X. Qin
以SnCl 2. 2 H2O和氧化石墨烯为原料，采用湿化学法制备了SnO 2/石墨烯复合材料。复合材料中还原度高的石墨烯可以提供高导电性和大电流放电容量。SnO 2纳米粒子均匀分布在石墨烯基体上，具有较高的可逆容量、良好的循环稳定性和优异的高倍率放电性能.初始放电和充电容量分别为1995.8 mAh g− 1和1923.5 mAh g−1。在1 A g-1的电流密度下，40次循环后，可逆放电容量仍保持在1545.7 mAh g-1，表明该复合材料是一种有前途的用于高储能锂离子电池的替代负极材料。
Tin oxide (SnO2)/graphene composite is synthesized via a simple wet chemical method using graphene oxide and SnCl2·2H2O as raw materials. Graphene of high reduction degree in the composite can provide high conductivity and large-current discharge capacity. SnO2nanoparticles with dimension around 5 nm are uniformly distributed on the graphene matrix.The SnO2/graphene composite exhibits outstanding electrochemical performance such as high reversible capacities, good cycling stability and excellent high-rate discharge performance. The initial discharge and charge capacities are 1995.8 mAh g−1and 1923.5 mAh g−1, respectively. After 40 cycles, the reversible discharge capacity is still maintained at 1545.7 mAh g−1at the current density of 1 A g−1, indicating that the composite is a promising alternative anode material used for high-storage lithium ion batteries.