S, Se-Codoped Dual Carbon Coating and Se Substitution in Co-Alkoxide-Derived CoS<sub>2</sub> Through SeS<sub>2</sub> Triggered Selenization for High-Performance Sodium-Ion Batteries
The development of metal sulfides as anodes for sodium-ion batteries (SIBs) is significantly obstructed by the slow kinetics of the electrochemical reactions and the substantial volume changes on the cycling. Herein, we introduce a selenium-substituted cobalt disulfide embedded within a dual carbon–...
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2025-01-01
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| author | Kaiqin Li Yuqi Kang Chengjiang Deng Yanfeng Wang Haocun Ba Qi An Xiaoyan Han Shaozhuan Huang |
| author_facet | Kaiqin Li Yuqi Kang Chengjiang Deng Yanfeng Wang Haocun Ba Qi An Xiaoyan Han Shaozhuan Huang |
| author_sort | Kaiqin Li |
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| description | The development of metal sulfides as anodes for sodium-ion batteries (SIBs) is significantly obstructed by the slow kinetics of the electrochemical reactions and the substantial volume changes on the cycling. Herein, we introduce a selenium-substituted cobalt disulfide embedded within a dual carbon–graphene framework (Se-CoS<sub>2</sub>/C@rGO) for high-performance SIBs. The Se-CoS<sub>2</sub>/C@rGO was prepared via a synchronous sulfurization/selenization strategy using Co-alkoxide as the precursor and SeS<sub>2</sub> as the source of selenium and sulfur, during which the EG anions are converted in situ to a S, Se codoped carbon scaffold. The dual carbon–graphene matrix not only improves the electronic conductivity but also stabilizes the electrode material effectively. In addition, the Se substitution within the CoS<sub>2</sub> lattice further improves the electrical conductivity and promotes the Na<sup>+</sup> reaction kinetics. The enhanced intrinsic electronic/ionic conductivity and reinforced structural stability endow the Se-CoS<sub>2</sub>/C@rGO anode with a high reversible capacity (558.2 mAh g<sup>−1</sup> at 0.2 A g<sup>−1</sup>), superior rate performance (351 mAh g<sup>−1</sup> at 20 A g<sup>−1</sup>), and long cycle life (93.5% capacity retention after 2100 cycles at 1 A g<sup>−1</sup>). This work provides new insights into the development of stable and reversible anode materials through Se substitution and dual carbon encapsulation. |
| format | Article |
| id | doaj-art-0ce7458fb17447849fd764288dd86e36 |
| institution | Kabale University |
| issn | 2313-0105 |
| language | English |
| publishDate | 2025-01-01 |
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| record_format | Article |
| series | Batteries |
| spelling | doaj-art-0ce7458fb17447849fd764288dd86e362025-01-24T13:22:28ZengMDPI AGBatteries2313-01052025-01-011112810.3390/batteries11010028S, Se-Codoped Dual Carbon Coating and Se Substitution in Co-Alkoxide-Derived CoS<sub>2</sub> Through SeS<sub>2</sub> Triggered Selenization for High-Performance Sodium-Ion BatteriesKaiqin Li0Yuqi Kang1Chengjiang Deng2Yanfeng Wang3Haocun Ba4Qi An5Xiaoyan Han6Shaozhuan Huang7Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, South-Central Minzu University, Wuhan 430074, ChinaKey Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, South-Central Minzu University, Wuhan 430074, ChinaKey Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, South-Central Minzu University, Wuhan 430074, ChinaKey Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, South-Central Minzu University, Wuhan 430074, ChinaKey Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, South-Central Minzu University, Wuhan 430074, ChinaKey Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, South-Central Minzu University, Wuhan 430074, ChinaKey Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, South-Central Minzu University, Wuhan 430074, ChinaKey Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, South-Central Minzu University, Wuhan 430074, ChinaThe development of metal sulfides as anodes for sodium-ion batteries (SIBs) is significantly obstructed by the slow kinetics of the electrochemical reactions and the substantial volume changes on the cycling. Herein, we introduce a selenium-substituted cobalt disulfide embedded within a dual carbon–graphene framework (Se-CoS<sub>2</sub>/C@rGO) for high-performance SIBs. The Se-CoS<sub>2</sub>/C@rGO was prepared via a synchronous sulfurization/selenization strategy using Co-alkoxide as the precursor and SeS<sub>2</sub> as the source of selenium and sulfur, during which the EG anions are converted in situ to a S, Se codoped carbon scaffold. The dual carbon–graphene matrix not only improves the electronic conductivity but also stabilizes the electrode material effectively. In addition, the Se substitution within the CoS<sub>2</sub> lattice further improves the electrical conductivity and promotes the Na<sup>+</sup> reaction kinetics. The enhanced intrinsic electronic/ionic conductivity and reinforced structural stability endow the Se-CoS<sub>2</sub>/C@rGO anode with a high reversible capacity (558.2 mAh g<sup>−1</sup> at 0.2 A g<sup>−1</sup>), superior rate performance (351 mAh g<sup>−1</sup> at 20 A g<sup>−1</sup>), and long cycle life (93.5% capacity retention after 2100 cycles at 1 A g<sup>−1</sup>). This work provides new insights into the development of stable and reversible anode materials through Se substitution and dual carbon encapsulation.https://www.mdpi.com/2313-0105/11/1/28sodium-ion batteriescobalt disulfideSe substitutiondual carbon–graphene encapsulationS, Se codoping |
| spellingShingle | Kaiqin Li Yuqi Kang Chengjiang Deng Yanfeng Wang Haocun Ba Qi An Xiaoyan Han Shaozhuan Huang S, Se-Codoped Dual Carbon Coating and Se Substitution in Co-Alkoxide-Derived CoS<sub>2</sub> Through SeS<sub>2</sub> Triggered Selenization for High-Performance Sodium-Ion Batteries Batteries sodium-ion batteries cobalt disulfide Se substitution dual carbon–graphene encapsulation S, Se codoping |
| title | S, Se-Codoped Dual Carbon Coating and Se Substitution in Co-Alkoxide-Derived CoS<sub>2</sub> Through SeS<sub>2</sub> Triggered Selenization for High-Performance Sodium-Ion Batteries |
| title_full | S, Se-Codoped Dual Carbon Coating and Se Substitution in Co-Alkoxide-Derived CoS<sub>2</sub> Through SeS<sub>2</sub> Triggered Selenization for High-Performance Sodium-Ion Batteries |
| title_fullStr | S, Se-Codoped Dual Carbon Coating and Se Substitution in Co-Alkoxide-Derived CoS<sub>2</sub> Through SeS<sub>2</sub> Triggered Selenization for High-Performance Sodium-Ion Batteries |
| title_full_unstemmed | S, Se-Codoped Dual Carbon Coating and Se Substitution in Co-Alkoxide-Derived CoS<sub>2</sub> Through SeS<sub>2</sub> Triggered Selenization for High-Performance Sodium-Ion Batteries |
| title_short | S, Se-Codoped Dual Carbon Coating and Se Substitution in Co-Alkoxide-Derived CoS<sub>2</sub> Through SeS<sub>2</sub> Triggered Selenization for High-Performance Sodium-Ion Batteries |
| title_sort | s se codoped dual carbon coating and se substitution in co alkoxide derived cos sub 2 sub through ses sub 2 sub triggered selenization for high performance sodium ion batteries |
| topic | sodium-ion batteries cobalt disulfide Se substitution dual carbon–graphene encapsulation S, Se codoping |
| url | https://www.mdpi.com/2313-0105/11/1/28 |
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