TiC@NiO核壳纳米结构的制备及电化学储能性能

以棉纤维为碳源和模板,采用生物模板法成功合成出直径50~200nm、长度几至十几微米的碳化钛纳米线,并通过化学浴沉积法在其表面均匀沉积氧化镍纳米片,所构建的TiC@NiO核壳纳米结构具有良好的超电容性能,制备成超级电容器后在1A/g电流密度下比电容量为560F/g,而类似条件下制备的NiO材料的比电容量仅为193.5F/g,并且TiC@NiO在20A/g电流密度下循环5000次后容量保持率达到83.6%,表现出了良好的循环稳定性。

Synthesis and Electrochemical Energy Storage Properties of TiC@NiO Core-Shell Nanoarchitecture

In the present work, TiC nanowires with a typical size of 50 nm to 200 nm in width and several micrometers in length were synthesized via a simple biotemplating method using natural nanoporous cotton fibers as both carbon source and template. Afterwards, the uniform growth of NiO nanosheets on the surface of TiC nanowires was implemented by chemical bath deposition method. The as-constructed TiC@NiO core-shell nanostructure showed good electrochemical energy storage performance with an electrode specific capacitance of 560 F/g at 1 A/g, much higher than that of pure NiO (193.5 F/g) prepared via the similar process, as well as good cycling stability with a capacitance retention of 83.6% when the electrode experienced 5000 charge-discharge cycles at 20 A/g.