Tailoring the Sodium Storage Performance of Carbon Nanowires by Microstructure Design and Surface Modification with N, O and S Heteroatoms

4 years ago

Tailoring the Sodium Storage Performance of Carbon Nanowires by Microstructure Design and Surface Modification with N, O and S Heteroatoms

Ruimin Han, Hongyu Dong, Qingling Li, Yang Liu, Yun Qiao, Shuting Yang, Yanhong Yin, Xiangnan Li, Mengyue Ma, Xiaoguang Cheng

The electronic environment and physicochemical property of carbon materials can be easily tailored and modulated by heteroatom doping. Herein, we demonstrate that net-like N, O, S triple-doped microporous carbon nanowires (NOS-MCNs) as an anode can be designed to improve the electrochemical performance of sodium ion batteries. Ammonium persulfate as oxidant can also provide a nitrogen and sulfur source for S-containing PPy. The N, O and S atoms are introduced into the carbon skeleton with activation and carbonization processes to modify the surface properties. As an anode, the material exhibits a high specific capacity and a long lifespan (≈301 mA h g−1 at 0.2 A g−1 after 1000 cycles) as well as an excellent rate capability (158 mA h g−1 at an extremely high current density of 10 A g−1). This work offers a facile strategy to synthesize triple-doped porous carbon materials for sodium ion batteries and other energy-storage fields. It′s as easy as one, two, three: Microporous carbon nanowires triple-doped with N, O and S heteroatoms (NOS-MCNs) were prepared as anode materials to improve the electrochemical performance of sodium-ion batteries. As an anode, the material exhibits a high specific capacity and a long lifespan (≈301 mA h g−1 at 0.2 A g−1 after 1000 cycles).

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/celc.201700554