Fabrication of uniform Si-incorporated SnO2 nanoparticles on graphene sheets as advanced anode for Li-ion batteries
Fabrication of uniform Si-incorporated SnO2 nanoparticles on graphene sheets as advanced anode for Li-ion batteries
复制标题
在石墨烯片上制备均匀的硅掺入 SnO2 纳米粒子作为锂离子电池的先进阳极
DOI：
10.1016/j.apsusc.2018.12.288
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发表时间：
2019-05-15
影响因子：
6.7
通讯作者：
Guo, Jin
中科院分区：
文献类型：
--
作者：
Liang, Xianqing;Wang, Junjie;Guo, Jin
SnO2-based anodes with high capacity are appealing for Li-ion batteries (LIBs). However, the large volume change and inferior cycling stability limit their practical application. To mitigate these problems, a novel nanocomposite of silicon-incorporated SnO2 with graphene sheets (STOG) has been successfully fabricated as anode material for LIBs. Through a simple hydrolysis process, ultrafine Si-incorporated SnO2 (STO) nanoparticles are uniformly loaded on the graphene sheets. Further it is found that Si incorporation brings about the Si-O-Sn bonding in the SnO2 matrix and strengthens the Sn-O-C bonding between STO and graphene. These merits can enhance the structural stability and electron/ion transport of STOG nanocomposite, facilitating the reversible conversion of Sn-SnO2. As a result, this STOG material delivers a high discharge capacity of 1117.8 mAh g(-1) and retains 92.5% of the second capacity after 100 cycles at 0.1 A g(-1). Furthermore, an excellent rate capacity of 683.9 mAh g(-1) can be obtained at a high current of 1 A g(-1). This work provides an effective way to design high-performance SnO2-based anode material for LIBs.
