Molybdenum Sulfide Selenide Nanosheets Synergized with Nitrogen‐Rich Carbon Frameworks toward High Performance and Stable Sodium Storage. Issue 13 (18th March 2022)

• Record Type: Journal Article
• Authors: Shi, Jiangwei; Li, Hang; Liu, Yuwei; Lu, Qingyi; Gao, Feng
• Is Part Of: Advanced materials interfaces. Volume 9:Issue 13(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-03-18
• Subjects: carbon nanoframeworks -- composites -- molybdenum sulfide selenide -- sodium‐ion batteries -- transition metal dichalcogenides; Materials science -- Periodicals; 620.11
• DOI: 10.1002/admi.202102408
• Languages: English
• ISSNs: 2196-7350

Abstract

Abstract: Transition metal dichalcogenides attract much attention in fabricating advanced electrodes for sodium‐ion batteries. Herein, to improve electrochemical activity and structural stability and thus enhance sodium storage performances, molybdenum sulfide selenide (MoSSe) nanosheets synergized with nitrogen‐rich carbon nanoframeworks (NCNF@MoSSe) are constructed through a combination of hydrothermal technique and template method with (NH4 )2 MoS4 and Se powders as the reactants and N‐rich polypyrrole nanotubes as the template. On the one hand, nitrogen‐rich carbon nanoframeworks with high conductance and thermal stability can serve as an effective carrier for an ideal charge migration. On the other hand, compared to MoS2 or MoSe2, MoSSe is a more desirable active material with smaller specific gravity and proper interlayer distance. The structural analyses demonstrate the strong core–shell combination and the good structural stability of the NCNF@MoSSe hybrids. As results, the NCNF@MoSSe hybrids can work as anode material with enhanced sodium storage properties and deliver a high specific capacity (502 mAh g −1 at 0.1 A g −1 ) as well as a good cyclic stability (323.3 mAh g −1 at 2.0 A g −1 after 700 cycles). Abstract : An in situ growth of MoSSe nanosheets on nitrogen‐rich carbon nanoframework is designed to acquire a stable composite structure consisting of strong chemical bond, which can well tolerate the long‐term sodiating/desodiating process without extra protection. As a result, the composite exhibits an outstanding cyclic stability for sodium‐ion batteries by maintaining 323.3 mAh g −1 after 700 cycles at 2 A g −1 .