Fast Energy Storage of SnS2 Anode Nanoconfined in Hollow Porous Carbon Nanofibers for Lithium-Ion Batteries

作者：Liang, Fanghua; Dong, Huilong; Dai, Jiamu; He, Honggang; Zhang, Wei^*; Chen, Shi; Lv, Dong^*; Liu, Hui; Kim, Ick Soo; Lai, Yuekun; Tang, Yuxin; Ge, Mingzheng^*

来源：Advanced Science, 2024, 11(4).

DOI：10.1002/advs.202306711

• charge carrier transfer
• hollow porous carbon nanofibers
• lithium-ion batteries
• SnS2 nanosheets
• ultrahigh charging rates

The development of conversion-typed anodes with ultrafast charging and large energy storage is quite challenging due to the sluggish ions/electrons transfer kinetics in bulk materials and fracture of the active materials. Herein, the design of porous carbon nanofibers/SnS2 composite (SnS2@N-HPCNFs) for high-rate energy storage, where the ultrathin SnS2 nanosheets are nanoconfined in N-doped carbon nanofibers with tunable void spaces, is reported. The highly interconnected carbon nanofibers in three-dimensional (3D) architecture provide a fast electron transfer pathway and alleviate the volume expansion of SnS2, while their hierarchical porous structure facilitates rapid ion diffusion. Specifically, the anode delivers a remarkable specific capacity of 1935.50 mAh g(-1) at 0.1 C and excellent rate capability up to 30 C with a specific capacity of 289.60 mAh g(-1). Meanwhile, at a high rate of 20 C, the electrode displays a high capacity retention of 84% after 3000 cycles and a long cycle life of 10 000 cycles. This work provides a deep insight into the construction of electrodes with high ionic/electronic conductivity for fast-charging energy storage devices.

• 单位
  福州大学; 1; 南通大学