A functional cathode sodium compensation agent for stable sodium-ion batteries
Hard carbon (HC) is widely used in sodium-ion batteries (SIBs), but its performance has always been limited by low initial Coulombic efficiency (ICE) and cycling stability. Cathode compensation agent is a favorable strategy to make up for the loss of active sodium ions consumed by HC anode. Yet it l...
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KeAi Communications Co., Ltd.
2025-01-01
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| Series: | Green Energy & Environment |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2468025724000414 |
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| author | Wei Wu Zhenglin Hu Zhengfei Zhao Aoxuan Wang Jiayan Luo |
| author_facet | Wei Wu Zhenglin Hu Zhengfei Zhao Aoxuan Wang Jiayan Luo |
| author_sort | Wei Wu |
| collection | DOAJ |
| description | Hard carbon (HC) is widely used in sodium-ion batteries (SIBs), but its performance has always been limited by low initial Coulombic efficiency (ICE) and cycling stability. Cathode compensation agent is a favorable strategy to make up for the loss of active sodium ions consumed by HC anode. Yet it lacks agent that effectively decomposes to increase the active sodium ions as well as regulate carbon defects for decreasing the irreversible sodium ions consumption. Here, we propose 1,2-dihydroxybenzene Na salt (NaDB) as a cathode compensation agent with high specific capacity (347.9 mAh g−1), lower desodiation potential (2.4–2.8 V) and high utilization (99%). Meanwhile, its byproduct could functionalize HC with more CO groups and promote its reversible capacity. Consequently, the presodiation hard carbon (pHC) anode exhibits highly reversible capacity of 204.7 mAh g−1 with 98% retention at 5 C rate over 1000 cycles. Moreover, with 5 wt% NaDB initially coated on the Na3V2(PO4)3 (NVP) cathode, the capacity retention of NVP + NaDB|HC cell could increase from 22% to 89% after 1000 cycles at 1 C rate. This work provides a new avenue to improve reversible capacity and cycling performance of SIBs through designing functional cathode compensation agent. |
| format | Article |
| id | doaj-art-2c7cd805e9874e2cb4bfe1d1d55ab3bf |
| institution | Kabale University |
| issn | 2468-0257 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Green Energy & Environment |
| spelling | doaj-art-2c7cd805e9874e2cb4bfe1d1d55ab3bf2025-01-05T04:28:26ZengKeAi Communications Co., Ltd.Green Energy & Environment2468-02572025-01-01101173182A functional cathode sodium compensation agent for stable sodium-ion batteriesWei Wu0Zhenglin Hu1Zhengfei Zhao2Aoxuan Wang3Jiayan Luo4Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, ChinaKey Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, ChinaKey Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, ChinaKey Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China; Corresponding authors. State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; Shanghai Jiao Tong University Shaoxing Research Institute of Renewable Energy and Molecular Engineering, Shaoxing, 312000, China; Corresponding authors. State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.Hard carbon (HC) is widely used in sodium-ion batteries (SIBs), but its performance has always been limited by low initial Coulombic efficiency (ICE) and cycling stability. Cathode compensation agent is a favorable strategy to make up for the loss of active sodium ions consumed by HC anode. Yet it lacks agent that effectively decomposes to increase the active sodium ions as well as regulate carbon defects for decreasing the irreversible sodium ions consumption. Here, we propose 1,2-dihydroxybenzene Na salt (NaDB) as a cathode compensation agent with high specific capacity (347.9 mAh g−1), lower desodiation potential (2.4–2.8 V) and high utilization (99%). Meanwhile, its byproduct could functionalize HC with more CO groups and promote its reversible capacity. Consequently, the presodiation hard carbon (pHC) anode exhibits highly reversible capacity of 204.7 mAh g−1 with 98% retention at 5 C rate over 1000 cycles. Moreover, with 5 wt% NaDB initially coated on the Na3V2(PO4)3 (NVP) cathode, the capacity retention of NVP + NaDB|HC cell could increase from 22% to 89% after 1000 cycles at 1 C rate. This work provides a new avenue to improve reversible capacity and cycling performance of SIBs through designing functional cathode compensation agent.http://www.sciencedirect.com/science/article/pii/S2468025724000414Hard carbonICECathode compensation agentReversible capacityStability |
| spellingShingle | Wei Wu Zhenglin Hu Zhengfei Zhao Aoxuan Wang Jiayan Luo A functional cathode sodium compensation agent for stable sodium-ion batteries Green Energy & Environment Hard carbon ICE Cathode compensation agent Reversible capacity Stability |
| title | A functional cathode sodium compensation agent for stable sodium-ion batteries |
| title_full | A functional cathode sodium compensation agent for stable sodium-ion batteries |
| title_fullStr | A functional cathode sodium compensation agent for stable sodium-ion batteries |
| title_full_unstemmed | A functional cathode sodium compensation agent for stable sodium-ion batteries |
| title_short | A functional cathode sodium compensation agent for stable sodium-ion batteries |
| title_sort | functional cathode sodium compensation agent for stable sodium ion batteries |
| topic | Hard carbon ICE Cathode compensation agent Reversible capacity Stability |
| url | http://www.sciencedirect.com/science/article/pii/S2468025724000414 |
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