Reduced Graphene-Oxide-Encapsulated MoS<sub>2</sub>/Carbon Nanofiber Composite Electrode for High-Performance Na-Ion Batteries
Sodium-ion batteries (SIBs) have been increasingly studied due to sodium (Na) being an inexpensive ionic resource (Na) and their battery chemistry being similar to that of current lithium-ion batteries (LIBs). However, SIBs have faced substantial challenges in developing high-performance anode mater...
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MDPI AG
2021-10-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/10/2691 |
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| author | Su-Ho Cho Jong-Heon Kim Il-Gyu Kim Jeong-Ho Park Ji-Won Jung Hyun-Suk Kim Il-Doo Kim |
| author_facet | Su-Ho Cho Jong-Heon Kim Il-Gyu Kim Jeong-Ho Park Ji-Won Jung Hyun-Suk Kim Il-Doo Kim |
| author_sort | Su-Ho Cho |
| collection | DOAJ |
| description | Sodium-ion batteries (SIBs) have been increasingly studied due to sodium (Na) being an inexpensive ionic resource (Na) and their battery chemistry being similar to that of current lithium-ion batteries (LIBs). However, SIBs have faced substantial challenges in developing high-performance anode materials that can reversibly store Na<sup>+</sup> in the host structure. To address these challenges, molybdenum sulfide (MoS<sub>2</sub>)-based active materials have been considered as promising anodes, owing to the two-dimensional layered structure of MoS<sub>2</sub> for stably (de)inserting Na<sup>+</sup>. Nevertheless, intrinsic issues of MoS<sub>2</sub>—such as low electronic conductivity and the loss of active S elements after a conversion reaction—have limited the viability of MoS<sub>2</sub> in practical SIBs. Here, we report MoS<sub>2</sub> embedded in carbon nanofibers encapsulated with a reduced graphene oxide (MoS<sub>2</sub>@CNFs@rGO) composite for SIB anodes. The MoS<sub>2</sub>@CNFs@rGO delivered a high capacity of 345.8 mAh g<sup>−1</sup> at a current density of 100 mA g<sup>−1</sup> for 90 cycles. The CNFs and rGO were synergistically taken into account for providing rapid pathways for electrons and preventing the dissolution of S sources during repetitive conversion reactions. This work offers a new point of view to realize MoS<sub>2</sub>-based anode materials in practical SIBs. |
| first_indexed | 2024-03-10T06:19:13Z |
| format | Article |
| id | doaj.art-71ee406b95164960a815604492042620 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T06:19:13Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-71ee406b95164960a8156044920426202023-11-22T19:25:12ZengMDPI AGNanomaterials2079-49912021-10-011110269110.3390/nano11102691Reduced Graphene-Oxide-Encapsulated MoS<sub>2</sub>/Carbon Nanofiber Composite Electrode for High-Performance Na-Ion BatteriesSu-Ho Cho0Jong-Heon Kim1Il-Gyu Kim2Jeong-Ho Park3Ji-Won Jung4Hyun-Suk Kim5Il-Doo Kim6Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, KoreaDepartment of Materials Science and Engineering, Chungnam National University, Daejeon 34134, KoreaSchool of Materials Science and Engineering, University of Ulsan, Ulsan 44776, KoreaSchool of Materials Science and Engineering, University of Ulsan, Ulsan 44776, KoreaSchool of Materials Science and Engineering, University of Ulsan, Ulsan 44776, KoreaDepartment of Materials Science and Engineering, Chungnam National University, Daejeon 34134, KoreaDepartment of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, KoreaSodium-ion batteries (SIBs) have been increasingly studied due to sodium (Na) being an inexpensive ionic resource (Na) and their battery chemistry being similar to that of current lithium-ion batteries (LIBs). However, SIBs have faced substantial challenges in developing high-performance anode materials that can reversibly store Na<sup>+</sup> in the host structure. To address these challenges, molybdenum sulfide (MoS<sub>2</sub>)-based active materials have been considered as promising anodes, owing to the two-dimensional layered structure of MoS<sub>2</sub> for stably (de)inserting Na<sup>+</sup>. Nevertheless, intrinsic issues of MoS<sub>2</sub>—such as low electronic conductivity and the loss of active S elements after a conversion reaction—have limited the viability of MoS<sub>2</sub> in practical SIBs. Here, we report MoS<sub>2</sub> embedded in carbon nanofibers encapsulated with a reduced graphene oxide (MoS<sub>2</sub>@CNFs@rGO) composite for SIB anodes. The MoS<sub>2</sub>@CNFs@rGO delivered a high capacity of 345.8 mAh g<sup>−1</sup> at a current density of 100 mA g<sup>−1</sup> for 90 cycles. The CNFs and rGO were synergistically taken into account for providing rapid pathways for electrons and preventing the dissolution of S sources during repetitive conversion reactions. This work offers a new point of view to realize MoS<sub>2</sub>-based anode materials in practical SIBs.https://www.mdpi.com/2079-4991/11/10/2691molybdenum sulfidescarbon nanofibersreduced graphene oxidesanodessodium-ion batteries |
| spellingShingle | Su-Ho Cho Jong-Heon Kim Il-Gyu Kim Jeong-Ho Park Ji-Won Jung Hyun-Suk Kim Il-Doo Kim Reduced Graphene-Oxide-Encapsulated MoS<sub>2</sub>/Carbon Nanofiber Composite Electrode for High-Performance Na-Ion Batteries Nanomaterials molybdenum sulfides carbon nanofibers reduced graphene oxides anodes sodium-ion batteries |
| title | Reduced Graphene-Oxide-Encapsulated MoS<sub>2</sub>/Carbon Nanofiber Composite Electrode for High-Performance Na-Ion Batteries |
| title_full | Reduced Graphene-Oxide-Encapsulated MoS<sub>2</sub>/Carbon Nanofiber Composite Electrode for High-Performance Na-Ion Batteries |
| title_fullStr | Reduced Graphene-Oxide-Encapsulated MoS<sub>2</sub>/Carbon Nanofiber Composite Electrode for High-Performance Na-Ion Batteries |
| title_full_unstemmed | Reduced Graphene-Oxide-Encapsulated MoS<sub>2</sub>/Carbon Nanofiber Composite Electrode for High-Performance Na-Ion Batteries |
| title_short | Reduced Graphene-Oxide-Encapsulated MoS<sub>2</sub>/Carbon Nanofiber Composite Electrode for High-Performance Na-Ion Batteries |
| title_sort | reduced graphene oxide encapsulated mos sub 2 sub carbon nanofiber composite electrode for high performance na ion batteries |
| topic | molybdenum sulfides carbon nanofibers reduced graphene oxides anodes sodium-ion batteries |
| url | https://www.mdpi.com/2079-4991/11/10/2691 |
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