Abstract
Molybdenum diselenide (MoSe2) is a two-dimensional (2D) transition metal dichalcogenide (TMD) material, attracting wide attention in lithium ion battery (LIB) and exhibiting great potential in next-generation magnesium ion battery (MIB) due to its unique layered structure with fast ion mobility and weak van der Waals interlayer interaction. However, the reported literatures related to MoSe2 mainly focus on the enhancement of performance in LIB without deep storage mechanisms investigations. Meanwhile,the magnesium storage capacity and mechanisms have not been explored. In this work, MoSe2 nanospheres were synthesized via wet chemical route and followed by annealing treatment. When used as the anode and cathode materials, the MoSe2 nanospheres exhibited the excellent high-rate capacity of > 100 mAh·g-1 at 5 A·g-1 for LIB and the excellent reversible discharge capacity of 120 mAh·g-1 at 20 mA·g-1 for MIB, respectively. Furthermore, the conversion-type at low plateau and the lithium-selenium battery reaction-type at high plateau of Li+ storage mechanisms, as well as the pseudocapacitive reaction as the main and intercalation-type reaction as the supplement storage mechanisms of Mg2+ are discussed by electrochemical, in situ and ex situ X-ray diffraction characterizations. This work not only provides the deep understanding of lithium storage mechanism, but also demonstrates the good magnesium storage potential of TMD materials.
Graphical Abstract
Keywords
molybdenum diselenide nanospheres, lithium ion battery, magnesium ion battery, storage mechanism, in or (ex) situ X-ray diffraction
Publication Date
2021-08-28
Online Available Date
2020-07-14
Revised Date
2020-06-12
Received Date
2020-05-11
Recommended Citation
Yi Peng, Wei Zhang, Fang-Zhen Zuo, Hao-Ying Lv, Kai-Jun Hong.
Storage Performance and Mechanism of MoSe2 Nanospheres in Lithium and Magnesium Ion Batteries[J]. Journal of Electrochemistry,
2021
,
27(4): 456-464.
DOI: Molybdenum diselenide (MoSe2) is a two-dimensional (2D) transition metal dichalcogenide (TMD) material, attracting wide attention in lithium ion battery (LIB) and exhibiting great potential in next-generation magnesium ion battery (MIB) due to its unique layered structure with fast ion mobility and weak van der Waals interlayer interaction. However, the reported literatures related to MoSe2 mainly focus on the enhancement of performance in LIB without deep storage mechanisms investigations. Meanwhile,the magnesium storage capacity and mechanisms have not been explored. In this work, MoSe2 nanospheres were synthesized via wet chemical route and followed by annealing treatment. When used as the anode and cathode materials, the MoSe2 nanospheres exhibited the excellent high-rate capacity of > 100 mAh·g-1 at 5 A·g-1 for LIB and the excellent reversible discharge capacity of 120 mAh·g-1 at 20 mA·g-1 for MIB, respectively. Furthermore, the conversion-type at low plateau and the lithium-selenium battery reaction-type at high plateau of Li+ storage mechanisms, as well as the pseudocapacitive reaction as the main and intercalation-type reaction as the supplement storage mechanisms of Mg2+ are discussed by electrochemical, in situ and ex situ X-ray diffraction characterizations. This work not only provides the deep understanding of lithium storage mechanism, but also demonstrates the good magnesium storage potential of TMD materials.
Available at: https://jelectrochem.xmu.edu.cn/journal/vol27/iss4/12
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