Nickel Hollow Spheres Concatenated by Nitrogen‐Doped Carbon Fibers for Enhancing Electrochemical Kinetics of Sodium–Sulfur Batteries
Abstract The high energy density of room temperature (RT) sodium–sulfur batteries (Na‐S) usually rely on the efficient conversion of polysulfide to sodium sulfide during discharging and sulfur recovery during charging, which is the rate‐determining step in the electrochemical reaction process of Na‐...
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| Format: | Article |
| Language: | English |
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Wiley
2020-02-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.201902617 |
| _version_ | 1818822198831349760 |
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| author | Bingshu Guo Wenyan Du Tingting Yang Jianhua Deng Dingyu Liu Yuruo Qi Jian Jiang Shu‐Juan Bao Maowen Xu |
| author_facet | Bingshu Guo Wenyan Du Tingting Yang Jianhua Deng Dingyu Liu Yuruo Qi Jian Jiang Shu‐Juan Bao Maowen Xu |
| author_sort | Bingshu Guo |
| collection | DOAJ |
| description | Abstract The high energy density of room temperature (RT) sodium–sulfur batteries (Na‐S) usually rely on the efficient conversion of polysulfide to sodium sulfide during discharging and sulfur recovery during charging, which is the rate‐determining step in the electrochemical reaction process of Na‐S batteries. In this work, a 3D network (Ni‐NCFs) host composed by nitrogen‐doped carbon fibers (NCFs) and Ni hollow spheres is synthesized by electrospinning. In this novel design, each Ni hollow unit not only can buffer the volume fluctuation of S during cycling, but also can improve the conductivity of the cathode along the carbon fibers. Meanwhile, the result reveals that a small amount of Ni is polarized during the sulfur‐loading process forming a polar NiS bond. Furthermore, combining with the nitrogen‐doped carbon fibers, the Ni‐NCFs composite can effectively adsorb soluble polysulfide intermediate, which further facilitates the catalysis of the Ni unit for the redox of sodium polysulfide. In addition, the in situ Raman is employed to supervise the variation of polysulfide during the charging and discharging process. As expected, the freestanding S@Ni‐NCFs cathode exhibits outstanding rate capability and excellent cycle performance. |
| first_indexed | 2024-12-18T23:20:17Z |
| format | Article |
| id | doaj.art-f39546c11d0f4ace895a177ef6990360 |
| institution | Directory Open Access Journal |
| issn | 2198-3844 |
| language | English |
| last_indexed | 2024-12-18T23:20:17Z |
| publishDate | 2020-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj.art-f39546c11d0f4ace895a177ef69903602022-12-21T20:48:02ZengWileyAdvanced Science2198-38442020-02-0174n/an/a10.1002/advs.201902617Nickel Hollow Spheres Concatenated by Nitrogen‐Doped Carbon Fibers for Enhancing Electrochemical Kinetics of Sodium–Sulfur BatteriesBingshu Guo0Wenyan Du1Tingting Yang2Jianhua Deng3Dingyu Liu4Yuruo Qi5Jian Jiang6Shu‐Juan Bao7Maowen Xu8Key Laboratory of Luminescent and Real‐Time Analytical Chemistry (Southwest University) Ministry of Education School of Materials and Energy Southwest University Chongqing 400715 P. R. ChinaKey Laboratory of Luminescent and Real‐Time Analytical Chemistry (Southwest University) Ministry of Education School of Materials and Energy Southwest University Chongqing 400715 P. R. ChinaKey Laboratory of Luminescent and Real‐Time Analytical Chemistry (Southwest University) Ministry of Education School of Materials and Energy Southwest University Chongqing 400715 P. R. ChinaKey Laboratory of Luminescent and Real‐Time Analytical Chemistry (Southwest University) Ministry of Education School of Materials and Energy Southwest University Chongqing 400715 P. R. ChinaKey Laboratory of Luminescent and Real‐Time Analytical Chemistry (Southwest University) Ministry of Education School of Materials and Energy Southwest University Chongqing 400715 P. R. ChinaKey Laboratory of Luminescent and Real‐Time Analytical Chemistry (Southwest University) Ministry of Education School of Materials and Energy Southwest University Chongqing 400715 P. R. ChinaKey Laboratory of Luminescent and Real‐Time Analytical Chemistry (Southwest University) Ministry of Education School of Materials and Energy Southwest University Chongqing 400715 P. R. ChinaKey Laboratory of Luminescent and Real‐Time Analytical Chemistry (Southwest University) Ministry of Education School of Materials and Energy Southwest University Chongqing 400715 P. R. ChinaKey Laboratory of Luminescent and Real‐Time Analytical Chemistry (Southwest University) Ministry of Education School of Materials and Energy Southwest University Chongqing 400715 P. R. ChinaAbstract The high energy density of room temperature (RT) sodium–sulfur batteries (Na‐S) usually rely on the efficient conversion of polysulfide to sodium sulfide during discharging and sulfur recovery during charging, which is the rate‐determining step in the electrochemical reaction process of Na‐S batteries. In this work, a 3D network (Ni‐NCFs) host composed by nitrogen‐doped carbon fibers (NCFs) and Ni hollow spheres is synthesized by electrospinning. In this novel design, each Ni hollow unit not only can buffer the volume fluctuation of S during cycling, but also can improve the conductivity of the cathode along the carbon fibers. Meanwhile, the result reveals that a small amount of Ni is polarized during the sulfur‐loading process forming a polar NiS bond. Furthermore, combining with the nitrogen‐doped carbon fibers, the Ni‐NCFs composite can effectively adsorb soluble polysulfide intermediate, which further facilitates the catalysis of the Ni unit for the redox of sodium polysulfide. In addition, the in situ Raman is employed to supervise the variation of polysulfide during the charging and discharging process. As expected, the freestanding S@Ni‐NCFs cathode exhibits outstanding rate capability and excellent cycle performance.https://doi.org/10.1002/advs.201902617effective catalysisfreestanding cathodesnickel hollow spheresreaction kineticssodium–sulfur batteries |
| spellingShingle | Bingshu Guo Wenyan Du Tingting Yang Jianhua Deng Dingyu Liu Yuruo Qi Jian Jiang Shu‐Juan Bao Maowen Xu Nickel Hollow Spheres Concatenated by Nitrogen‐Doped Carbon Fibers for Enhancing Electrochemical Kinetics of Sodium–Sulfur Batteries Advanced Science effective catalysis freestanding cathodes nickel hollow spheres reaction kinetics sodium–sulfur batteries |
| title | Nickel Hollow Spheres Concatenated by Nitrogen‐Doped Carbon Fibers for Enhancing Electrochemical Kinetics of Sodium–Sulfur Batteries |
| title_full | Nickel Hollow Spheres Concatenated by Nitrogen‐Doped Carbon Fibers for Enhancing Electrochemical Kinetics of Sodium–Sulfur Batteries |
| title_fullStr | Nickel Hollow Spheres Concatenated by Nitrogen‐Doped Carbon Fibers for Enhancing Electrochemical Kinetics of Sodium–Sulfur Batteries |
| title_full_unstemmed | Nickel Hollow Spheres Concatenated by Nitrogen‐Doped Carbon Fibers for Enhancing Electrochemical Kinetics of Sodium–Sulfur Batteries |
| title_short | Nickel Hollow Spheres Concatenated by Nitrogen‐Doped Carbon Fibers for Enhancing Electrochemical Kinetics of Sodium–Sulfur Batteries |
| title_sort | nickel hollow spheres concatenated by nitrogen doped carbon fibers for enhancing electrochemical kinetics of sodium sulfur batteries |
| topic | effective catalysis freestanding cathodes nickel hollow spheres reaction kinetics sodium–sulfur batteries |
| url | https://doi.org/10.1002/advs.201902617 |
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