Tunable Free-Standing Core-Shell CNT@MoSe2 Anode for Lithium Storage

Yousaf, Muhammad1; Wang, Yunsong1; Chen, Yijun1; Wang, Zhipeng1; Aftab, Waseem1; Mahmood, Asif1,2; Wang, Wei1; Guo, Shaojun1; Han, Ray P. S.1

2018-05-02

10.1021/acsami.7b19739

ACS Applied Materials & Interfaces   影响因子和分区

1944-8244

Heterogeneous nanostructuring of MoSe2 over a carbon nanotube (CNT) sponge as a free-standing electrode not only brings higher performance but also eliminates the need for dead elements such as a binder, conductive carbon, and supportive current collectors. Further, the porous CNT sponge can be easily compacted via an intense densification of the active material MoSe2 to produce an electrode with a high mass loading for a significantly improved areal capacity. In this work, we present a tunable coating of MoSe2 on a CNT sponge to fabricate a core-shell MoSe2@CNT anode. The three-dimensional nanotubular sponge is synthesized via a solvothermal process, followed by thermal annealing to improve crystallization. Structural and morphological studies revealed that MoSe2 grew as a layered structure (d = 0.66 nm), where numbers of layers can be controlled to yield optimized results for Li+ storage. We showed that the 10-layer core-shell CNT@MoSe2 hybrid sponge delivered a discharge capacity of 820.5 mAh g(-1) after 100 cycles at 100 mA g(-1) with a high cyclic stability and rate capability. Further, an ex situ structural and morphological analysis revealed that ionic storage causes a phase change in MoSe2 from a crystalline to a partial amorphous state for a continuous increase in the capacity with extended cycling. We believe that the strategy developed here will assist users to tune the electrode materials for future energy-storage devices, especially how the materials are changing with the passage of time and their effects on the device performance.

nanotubular structures core-shell structures MoSe2 free-standing electrodes LIBs

SCI ; EI

英语

其他

National Nature Science Foundation of China[51325202]

Science & Technology - Other Topics ; Materials Science

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000431723400042

AMER CHEMICAL SOC

20181905153392

Anodes ; Carbon nanotubes ; Electric discharges ; Lithium ; Morphology ; Shells (structures) ; Storage (materials) ; Yarn

Structural Members and Shapes:408.2 ; Lithium and Alloys:542.4 ; Storage:694.4 ; Electricity: Basic Concepts and Phenomena:701.1 ; Electron Tubes:714.1 ; Nanotechnology:761 ; Fiber Products:819.4 ; Materials Science:951

Web of Science

1.Peking Univ, Dept Mat Sci & Engn, Beijing 100871, Peoples R China
2.South Univ Sci & Technol, Dept Phys, Shenzhen 518000, Peoples R China

Yousaf, Muhammad,Wang, Yunsong,Chen, Yijun,et al. Tunable Free-Standing Core-Shell CNT@MoSe2 Anode for Lithium Storage[J]. ACS Applied Materials & Interfaces,2018,10(17):14622-14631.

Yousaf, Muhammad.,Wang, Yunsong.,Chen, Yijun.,Wang, Zhipeng.,Aftab, Waseem.,...&Han, Ray P. S..(2018).Tunable Free-Standing Core-Shell CNT@MoSe2 Anode for Lithium Storage.ACS Applied Materials & Interfaces,10(17),14622-14631.

Yousaf, Muhammad,et al."Tunable Free-Standing Core-Shell CNT@MoSe2 Anode for Lithium Storage".ACS Applied Materials & Interfaces 10.17(2018):14622-14631.