Carbon-coated SnO2@carbon nanofibers produced by electrospinning-electrospraying method for anode materials of lithium-ion batteries
Carbon-coated SnO2@carbon nanofibers produced by electrospinning-electrospraying method for anode materials of lithium-ion batteries
复制标题
静电纺丝-电喷雾法制备碳包覆SnO2@碳纳米纤维用于锂离子电池负极材料
DOI：
10.1016/j.matchemphys.2018.11.066
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发表时间：
2019-02-01
影响因子：
4.6
通讯作者：
Li, Fengyan
中科院分区：
文献类型：
--
作者：
Wang, Wei;Liang, Yaohui;Li, Fengyan
在这项研究中，碳包覆的SnO 2纳米粒子负载在纯碳纳米纤维（（SnO2@C）/CNFs）的同步静电纺丝-电喷雾方法和随后的热处理。与传统静电纺丝法制备的SnO2@CNFs复合材料相比，碳包覆SnO 2纳米粒子在CNFs表面均匀分散，并与CNFs表面紧密结合。（SnO2@C）/CNFs复合材料在100 mA g（-1）下的首次放电容量为1425 mAh g（-1），首次库仑效率为63.24%。在50次循环后也显示出类似于500 mAh g（-1）的可逆容量。值得注意的是，（SnO2@C）/CNFs复合材料优异的电化学性能归因于外部碳包覆的SnO 2纳米颗粒和未破坏的CNFs三维互连网络的协同作用。此外，这种同步静电纺丝-电喷雾方法简单，高效和可扩展，为锂离子电池负极材料的生产提供了一种潜在的策略。
In this study, carbon-coated SnO2 nanoparticles were loaded on pure carbon nanofibers ((SnO2@C)/CNFs) by the synchronized electrospinning-electrospraying method and subsequent heat treatment. Compared with SnO2@CNFs composites fabricated by conventional electrospinning method, carbon-coated SnO2 nanoparticles were homogeneously dispersed while attached tightly on CNFs surface with the help of carbon coating. The (SnO2@C)/CNFs composites delivered an outstanding initial discharge capacity of 1425 mAh g(-1) at 100 mA g(-1) and an initial coulombic efficiency of 63.24%. A reversible capacity of similar to 500 mAh g(-1) was also displayed after 50 cycles. Remarkably, the outstanding electrochemical performance of (SnO2@C)/CNFs composites was ascribed to the cooperative effect of external carbon-coated SnO2 nanoparticles and unmarred CNFs three-dimensional interconnection networks. Furthermore, this synchronized electrospinning-electrospraying method was simple, efficient and scalable, providing a potential strategy for lithium-ion battery anode material production.