Yu Qiyao, Hu Jun, Wang Bo, Peng Yi, Liu Qian, Li Ying
Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, People's Republic of China.
Nanotechnology. 2020 Oct 23;31(43):435406. doi: 10.1088/1361-6528/aba20f. Epub 2020 Jul 2.
In todays energy field, the long-term development of lithium-ion batteries has been limited due to the scarcity and high cost of lithium resources. On the other hand, research towards of potassium-ion batteries (KIBs) is on the rise. Herein, we synthesize Fe-induced carbon nanotube/nitrogen-doped carbon (FNC) derived from metal-organic frameworks as a promising anode for KIBs. The carbon nanotubes can enhance the electronic conductivity and increase the contact area, thus improving the rate performance. Additionally, the amorphous carbon polyhedral frame can boost the electrochemical stability. Therefore, the FNC electrode exhibits a high reversible capacity (a charge capability of 268 mAh g after 200 cycles at 0.1 A g) and an excellent rate performance.
在当今的能源领域，由于锂资源的稀缺和高成本，锂离子电池的长期发展受到限制。另一方面，对钾离子电池（KIBs）的研究正在兴起。在此，我们合成了源自金属有机框架的铁诱导碳纳米管/氮掺杂碳（FNC），作为一种有前景的钾离子电池负极材料。碳纳米管可以提高电子导电性并增加接触面积，从而改善倍率性能。此外，非晶态碳多面体框架可以增强电化学稳定性。因此，FNC电极表现出高可逆容量（在0.1 A g下循环200次后充电容量为268 mAh g）和优异的倍率性能。
