| Autor: |
Xu, Shaolong, Lu, Xinchao, Mo, Qiqi, Lv, Yiju, Huang, Bin, Liu, Zheng, Zou, Pintian, Xu, Shuai |
| Zdroj: |
Jouranl of Energy Storage; 20240101, Issue: Preprints |
| Abstrakt: |
Molybdenum disulfide (MoS2) has attracted significant attention as a promising cathode material for aqueous zinc ion batteries (AZIBs) due to its high theoretical capacity. However, the sluggish reaction kinetics and limited cycling stability of MoS2bring substantial challenges to its widespread utilization. Herein, the hydrangea-like MoS2nanosheets have been synthesized through in-situ co-doping of F and P, which produce an abundance of S vacancies that expand the MoS2interlayer spacing, increase the number of active sites, enhance the reaction kinetics of Zn2+, and deliver excellent electrochemical properties. The synthesized F/P-MoS2demonstrates exceptional rate performance as expected, with a capacity of 147.7 mAh g−1at a current density of 0.1 A g−1and favorable cycle stability, retaining a capacity of 88.4 mAh g−1after 200 cycles at 1.0 A g−1when used as the positive electrode for AZIBs. Kinetic investigations have revealed that the electrochemical process of F/P-MoS2is primarily controlled by pseudocapacitance behavior, which enhances its charge and discharge dynamics while maintaining its structural integrity throughout cycling. This work offers valuable insights for enhancing the energy storage performance of MoS2. |
| Databáze: |
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