MoS2/N-doped graphene aerogles composite anode for high performance sodium/potassium ion batteries. (10th April 2020)

• Record Type: Journal Article
• Authors: Dong, Xiaoyu; Xing, Zheng; Zheng, Guojun; Gao, Xinran; Hong, Haiping; Ju, Zhicheng; Zhuang, Quanchao
• Is Part Of: Electrochimica acta. Volume 339(2020)
• Publication Date: 2020-04-10
• Subjects: Sodium-ion batteries -- Potassium -ion batteries -- MoS2/Nitrogen doping aerogel -- Electrochemical performance; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2020.135932
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Three-dimensional porous MoS2 /nitrogen-doped graphene aerogels (MoS2 /NGA) with different MoS2 loading masses were synthesized by a simple hydrothermal method. The unique structure can provide more Na + (K + ) transport channels and the three-dimensional porous morphology could greatly absorb the volume expansion of MoS2 during charging and discharging process. As the anode of sodium-ion batteries (SIBs), this material provides a specific capacity of 673 mAh g −1 at a current density of 100 mA g −1 with long cycle stability. In addition, the composite shows a specific capacity of 305 mAh g −1 at 2000 mA g −1 and exhibits excellent capacity reversibility after rate performance test, indicating that it is a promising anode choice for SIB. As the anode material of potassium-ion batteries (KIBs), it provides a reversible specific capacity of 349 mAh g −1 at a current density of 100 mA g −1 . It has a specific capacity of 72 mAhg −1 at 5000 mAg −1 and exhibits excellent capacity reversibility after rate performance test as well. Therefore, this work provides some insights into the fabrication of MoS2 /graphene composites and is helpful for the design of high-performance anode materials of metal ion batteries. Graphical abstract: Image 1 Highlights: A facile hydrothermal method was used to prepare MoS2 /N-graphene aerogel (MoS2 /NGA). MoS2 /NGA composite could inhibit dissolution of cations and reduce dissolution of electrolytes, simultaneously. The interface between active materials and electrolytes could increase stability of the electrode structure. Synergistic effects of interface storage and alloying/dealloying reaction improve electrochemical performance significantly.