Enhancing the Catalytic Activity of Layered Double Hydroxide Supported on Graphene for Lithium–Sulfur Redox Reactions
The lithium–sulfur battery is one of the next-generation rechargeable battery candidates due to its high theoretical energy density and low cost. However, the sluggish conversion kinetics of soluble lithium polysulfides into insoluble Li<sub>2</sub>S<sub>2</sub>/Li<sub>...
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MDPI AG
2022-10-01
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| Online Access: | https://www.mdpi.com/2313-0105/8/11/200 |
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| author | Junjie Xu Rui Tang Minghui Liu Shuai Xie Dawei Zhang Xianghua Kong Song Jin Hengxing Ji Tierui Zhang |
| author_facet | Junjie Xu Rui Tang Minghui Liu Shuai Xie Dawei Zhang Xianghua Kong Song Jin Hengxing Ji Tierui Zhang |
| author_sort | Junjie Xu |
| collection | DOAJ |
| description | The lithium–sulfur battery is one of the next-generation rechargeable battery candidates due to its high theoretical energy density and low cost. However, the sluggish conversion kinetics of soluble lithium polysulfides into insoluble Li<sub>2</sub>S<sub>2</sub>/Li<sub>2</sub>S leads to low sulfur utilization, retarded rate responses, and rapid capacity decay. Here, we enhance the sulfur reduction kinetics by designing and synthesizing a lamellar-structured NiFeLDH and reduced graphene oxide (rGO) composite. The assembly of a two-dimensional NiFeLDH with rGO, which has high conductivity and electrocatalytic activity, significantly enhances the electrochemical steps of sulfur reduction. The S@NiFeLDH/rGO cathode delivers an initial discharge capacity of 1014 mAh g<sup>−1</sup> at 0.2 C and a capacity of 930 mAh g<sup>−1</sup> after 100 cycles at 0.2 C. Even at a high current density of 1 C, the S@NiFeLDH/rGO could maintain a high capacity of 554 mAh g<sup>−1</sup> after 400 cycles. |
| first_indexed | 2024-03-09T19:16:08Z |
| format | Article |
| id | doaj.art-6cf5fd1d9844428faf9d0fb02398aedd |
| institution | Directory Open Access Journal |
| issn | 2313-0105 |
| language | English |
| last_indexed | 2024-03-09T19:16:08Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Batteries |
| spelling | doaj.art-6cf5fd1d9844428faf9d0fb02398aedd2023-11-24T03:44:44ZengMDPI AGBatteries2313-01052022-10-0181120010.3390/batteries8110200Enhancing the Catalytic Activity of Layered Double Hydroxide Supported on Graphene for Lithium–Sulfur Redox ReactionsJunjie Xu0Rui Tang1Minghui Liu2Shuai Xie3Dawei Zhang4Xianghua Kong5Song Jin6Hengxing Ji7Tierui Zhang8School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, ChinaSchool of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, ChinaSchool of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, ChinaNational Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei 230026, ChinaSchool of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, ChinaSchool of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, ChinaNational Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei 230026, ChinaNational Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei 230026, ChinaKey Laboratory of Photochemical Conversion and Optoelectronic, Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, ChinaThe lithium–sulfur battery is one of the next-generation rechargeable battery candidates due to its high theoretical energy density and low cost. However, the sluggish conversion kinetics of soluble lithium polysulfides into insoluble Li<sub>2</sub>S<sub>2</sub>/Li<sub>2</sub>S leads to low sulfur utilization, retarded rate responses, and rapid capacity decay. Here, we enhance the sulfur reduction kinetics by designing and synthesizing a lamellar-structured NiFeLDH and reduced graphene oxide (rGO) composite. The assembly of a two-dimensional NiFeLDH with rGO, which has high conductivity and electrocatalytic activity, significantly enhances the electrochemical steps of sulfur reduction. The S@NiFeLDH/rGO cathode delivers an initial discharge capacity of 1014 mAh g<sup>−1</sup> at 0.2 C and a capacity of 930 mAh g<sup>−1</sup> after 100 cycles at 0.2 C. Even at a high current density of 1 C, the S@NiFeLDH/rGO could maintain a high capacity of 554 mAh g<sup>−1</sup> after 400 cycles.https://www.mdpi.com/2313-0105/8/11/200layered double hydroxidegraphenecatalystlithium–sulfur battery |
| spellingShingle | Junjie Xu Rui Tang Minghui Liu Shuai Xie Dawei Zhang Xianghua Kong Song Jin Hengxing Ji Tierui Zhang Enhancing the Catalytic Activity of Layered Double Hydroxide Supported on Graphene for Lithium–Sulfur Redox Reactions Batteries layered double hydroxide graphene catalyst lithium–sulfur battery |
| title | Enhancing the Catalytic Activity of Layered Double Hydroxide Supported on Graphene for Lithium–Sulfur Redox Reactions |
| title_full | Enhancing the Catalytic Activity of Layered Double Hydroxide Supported on Graphene for Lithium–Sulfur Redox Reactions |
| title_fullStr | Enhancing the Catalytic Activity of Layered Double Hydroxide Supported on Graphene for Lithium–Sulfur Redox Reactions |
| title_full_unstemmed | Enhancing the Catalytic Activity of Layered Double Hydroxide Supported on Graphene for Lithium–Sulfur Redox Reactions |
| title_short | Enhancing the Catalytic Activity of Layered Double Hydroxide Supported on Graphene for Lithium–Sulfur Redox Reactions |
| title_sort | enhancing the catalytic activity of layered double hydroxide supported on graphene for lithium sulfur redox reactions |
| topic | layered double hydroxide graphene catalyst lithium–sulfur battery |
| url | https://www.mdpi.com/2313-0105/8/11/200 |
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