Tungsten-Modulated Molybdenum Selenide/Graphene Heterostructure as an Advanced Electrode for All-Solid-State Supercapacitors
Transition metal dichalcogenides (TMDs) have attracted widespread attention due to their excellent electrochemical and catalytic properties. In this work, a tungsten (W)-modulated molybdenum selenide (MoSe<sub>2</sub>)/graphene heterostructure was investigated for application in electroc...
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MDPI AG
2021-06-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/6/1477 |
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| author | Qixian Liu Jing Ning Haibin Guo Maoyang Xia Boyu Wang Xin Feng Dong Wang Jincheng Zhang Yue Hao |
| author_facet | Qixian Liu Jing Ning Haibin Guo Maoyang Xia Boyu Wang Xin Feng Dong Wang Jincheng Zhang Yue Hao |
| author_sort | Qixian Liu |
| collection | DOAJ |
| description | Transition metal dichalcogenides (TMDs) have attracted widespread attention due to their excellent electrochemical and catalytic properties. In this work, a tungsten (W)-modulated molybdenum selenide (MoSe<sub>2</sub>)/graphene heterostructure was investigated for application in electrochemistry. MoSe<sub>2</sub>/graphene heterojunctions with low-doped W compositions were synthesized by a one-step hydrothermal catalysis approach. Based on the conducted density functional theory (DFT) calculations, it was determined that inserting a small amount of W (≈5%) into the MoSe<sub>2</sub>/graphene heterostructure resulted in the modification of its lattice structure. Additionally, an increase in the distance between layers (≈8%) and a decrease in the adsorption energy of the potassium ions (K<sup>+</sup>) (≈−1.08 eV) were observed following W doping. Overall, the electrochemical performance of the MoSe<sub>2</sub>/graphene hybrid was enhanced by the presence of W. An all-solid-state supercapacitor device prepared using electrodes based on the W-doped MoSe<sub>2</sub>/graphene composite achieved excellent capacitance of 444.4 mF cm<sup>−2</sup> at 1 mV s<sup>−1</sup>. The results obtained herein revealed that the MoSe<sub>2</sub>/graphene hybrid exhibiting low W composition could be valuable in the field of energy storage and isoelectronic doping of TMDs. |
| first_indexed | 2024-03-10T10:46:07Z |
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| id | doaj.art-a5058d3bd81e4aabb1c836cbfccd1898 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T10:46:07Z |
| publishDate | 2021-06-01 |
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| series | Nanomaterials |
| spelling | doaj.art-a5058d3bd81e4aabb1c836cbfccd18982023-11-21T22:34:25ZengMDPI AGNanomaterials2079-49912021-06-01116147710.3390/nano11061477Tungsten-Modulated Molybdenum Selenide/Graphene Heterostructure as an Advanced Electrode for All-Solid-State SupercapacitorsQixian Liu0Jing Ning1Haibin Guo2Maoyang Xia3Boyu Wang4Xin Feng5Dong Wang6Jincheng Zhang7Yue Hao8The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xi’an 710071, ChinaThe State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xi’an 710071, ChinaThe State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xi’an 710071, ChinaThe State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xi’an 710071, ChinaThe State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xi’an 710071, ChinaThe State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xi’an 710071, ChinaThe State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xi’an 710071, ChinaThe State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xi’an 710071, ChinaThe State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xi’an 710071, ChinaTransition metal dichalcogenides (TMDs) have attracted widespread attention due to their excellent electrochemical and catalytic properties. In this work, a tungsten (W)-modulated molybdenum selenide (MoSe<sub>2</sub>)/graphene heterostructure was investigated for application in electrochemistry. MoSe<sub>2</sub>/graphene heterojunctions with low-doped W compositions were synthesized by a one-step hydrothermal catalysis approach. Based on the conducted density functional theory (DFT) calculations, it was determined that inserting a small amount of W (≈5%) into the MoSe<sub>2</sub>/graphene heterostructure resulted in the modification of its lattice structure. Additionally, an increase in the distance between layers (≈8%) and a decrease in the adsorption energy of the potassium ions (K<sup>+</sup>) (≈−1.08 eV) were observed following W doping. Overall, the electrochemical performance of the MoSe<sub>2</sub>/graphene hybrid was enhanced by the presence of W. An all-solid-state supercapacitor device prepared using electrodes based on the W-doped MoSe<sub>2</sub>/graphene composite achieved excellent capacitance of 444.4 mF cm<sup>−2</sup> at 1 mV s<sup>−1</sup>. The results obtained herein revealed that the MoSe<sub>2</sub>/graphene hybrid exhibiting low W composition could be valuable in the field of energy storage and isoelectronic doping of TMDs.https://www.mdpi.com/2079-4991/11/6/1477tungsten-modulatedmolybdenum selenide/grapheneall-solid-state supercapacitors |
| spellingShingle | Qixian Liu Jing Ning Haibin Guo Maoyang Xia Boyu Wang Xin Feng Dong Wang Jincheng Zhang Yue Hao Tungsten-Modulated Molybdenum Selenide/Graphene Heterostructure as an Advanced Electrode for All-Solid-State Supercapacitors Nanomaterials tungsten-modulated molybdenum selenide/graphene all-solid-state supercapacitors |
| title | Tungsten-Modulated Molybdenum Selenide/Graphene Heterostructure as an Advanced Electrode for All-Solid-State Supercapacitors |
| title_full | Tungsten-Modulated Molybdenum Selenide/Graphene Heterostructure as an Advanced Electrode for All-Solid-State Supercapacitors |
| title_fullStr | Tungsten-Modulated Molybdenum Selenide/Graphene Heterostructure as an Advanced Electrode for All-Solid-State Supercapacitors |
| title_full_unstemmed | Tungsten-Modulated Molybdenum Selenide/Graphene Heterostructure as an Advanced Electrode for All-Solid-State Supercapacitors |
| title_short | Tungsten-Modulated Molybdenum Selenide/Graphene Heterostructure as an Advanced Electrode for All-Solid-State Supercapacitors |
| title_sort | tungsten modulated molybdenum selenide graphene heterostructure as an advanced electrode for all solid state supercapacitors |
| topic | tungsten-modulated molybdenum selenide/graphene all-solid-state supercapacitors |
| url | https://www.mdpi.com/2079-4991/11/6/1477 |
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