Journal
CARBON
Volume 169, Issue -, Pages 1-8Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2020.07.010
Keywords
MOFs; Carbon dodecahedron; MoSe2 nanosheets; Core/shell structures; Sodium-ion batteries
Funding
- Natural Science Foundation of China [51902280]
- Zhongyuan Thousand Talents Plan-Science and Technology Innovation Leading Talents Project [204200510030]
- Henan Provincial Science and technology innovation team [C20150026]
- Nanhu Scholars Program of XYNU
- Nanhu Scholars Program for Young Scholars of XYNU
- Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies [JJNY201908]
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Molybdenum diselenide (MoSe2) has drawn a lot of attention for high-performance sodium ion batteries (SIBs) as anode material, for its high theoretical capacity as well as large interlayer distance. Nevertheless, the low capacity and the poor cycling stability greatly hinder their application. Herein, a facile strategy to improve the storage performance of sodium was proposed by the in-situ growth of MoSe2 on zeolitic imidazolate framework-8 (ZIF-8)-derived nitrogen doped porous carbon dodecahedron (MoSe2/N-PCD). The N-PCD can provide a fast electron transfer route for the MoSe2 , and the robust interface between MoSe2 and N-PCD can relief the structure changes of the electrode during the sodiation/desodiation. When used as an anode for SIBs, the prepared MoSe2/N-PCD electrode displays a large initial specific capacity of 464 mA h g(-1) at 0.2 A g(-1) , and the capacity maintains at 437 mA h g(-1) after 500 cycles. Furthermore, at a high current density of 2 A g(-1) , the electrode can still show a capacity of 223 mA h g(-1) after 1000 cycles (capacity retention-83%). This work demonstrates an effective way to prepare high performance MoSe2 based anode materials for sodium-ion battery. (C) 2020 Elsevier Ltd. All rights reserved.
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