Design and Synthesis of Viologen‐based Copolymers for High Performance Li‐Dual‐Ion Batteries
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| Format: | Artículo Open Access |
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2024
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| _version_ | 1867016644583227392 |
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| author | Ao Yu Chengqiu Li Xianhe Chen Chenxing Zhang Shilin Mei Chang‐Jiang Yao |
| author_facet | Ao Yu Chengqiu Li Xianhe Chen Chenxing Zhang Shilin Mei Chang‐Jiang Yao Ao Yu Chengqiu Li Xianhe Chen Chenxing Zhang Shilin Mei Chang‐Jiang Yao |
| collection | Wiley Open Access |
| contents | Design and Synthesis of Viologen‐based Copolymers for High Performance Li‐Dual‐Ion Batteries Ao Yu Chengqiu Li Xianhe Chen Chenxing Zhang Shilin Mei Chang‐Jiang Yao ChemSusChem AbstractDual‐ion batteries based on organic electrodes show great potential to break through the bottlenecks existed in conventional LIBs due to their high specific capacity, lifted working voltage, and environmental benignity. Herein, two innovative viologen‐based bipolar copolymers poly(viologen‐pyrene‐4,5,9,10‐tetrone dichloride) (PVPTOCl2) and poly(viologen‐anthraquinone dichloride) (PVAQCl2) were synthesized and applied as high performance cathodes for lithium‐dual‐ion battery. Bearing the dual‐ion storage capability of viologen and carbonyls, as well as the conjugated structure of pyrene‐4,5,9,10‐tetrone, the synthesized copolymers show remarkable electrochemical performances for LIBs. Compared to PVAQCl2, PVPTOCl2 shows superior electrochemical performance with high initial specific capacity (235.0 mAh g−1 at 200 mA g−1), high reversibility (coulombic efficiency up to 99.96 % at 1 A g−1), excellent rate performance (150.3 mAh g−1 at 5 A g−1) and outstanding cycling stability (a reversible capacity of 197.5 mAh g−1 at a current density of 1 A g−1 and a low capacity loss per cycle of 0.11‰ during 3000 cycles). Moreover, the charge storage mechanism was systematically investigated by ex‐situ FT‐IR, ex‐situ XPS and DFT calculations. The results clearly reveal the structure‐property relationship of the bipolar‐molecules, providing a new platform to develop efficient bipolar materials for dual‐ion batteries. 10.1002/cssc.202301809 http://onlinelibrary.wiley.com/termsAndConditions#vor |
| doi_str_mv | 10.1002/cssc.202301809 |
| format | Artículo Open Access |
| id | wiley_oa_10_1002_cssc_202301809 |
| institution | Wiley Open Access |
| license_str_mv | http://onlinelibrary.wiley.com/termsAndConditions#vor |
| publishDate | 2024 |
| publisher | Wiley |
| record_format | wiley_oa |
| spellingShingle | Design and Synthesis of Viologen‐based Copolymers for High Performance Li‐Dual‐Ion Batteries Ao Yu Chengqiu Li Xianhe Chen Chenxing Zhang Shilin Mei Chang‐Jiang Yao ChemSusChem Design and Synthesis of Viologen‐based Copolymers for High Performance Li‐Dual‐Ion Batteries Ao Yu Chengqiu Li Xianhe Chen Chenxing Zhang Shilin Mei Chang‐Jiang Yao ChemSusChem AbstractDual‐ion batteries based on organic electrodes show great potential to break through the bottlenecks existed in conventional LIBs due to their high specific capacity, lifted working voltage, and environmental benignity. Herein, two innovative viologen‐based bipolar copolymers poly(viologen‐pyrene‐4,5,9,10‐tetrone dichloride) (PVPTOCl2) and poly(viologen‐anthraquinone dichloride) (PVAQCl2) were synthesized and applied as high performance cathodes for lithium‐dual‐ion battery. Bearing the dual‐ion storage capability of viologen and carbonyls, as well as the conjugated structure of pyrene‐4,5,9,10‐tetrone, the synthesized copolymers show remarkable electrochemical performances for LIBs. Compared to PVAQCl2, PVPTOCl2 shows superior electrochemical performance with high initial specific capacity (235.0 mAh g−1 at 200 mA g−1), high reversibility (coulombic efficiency up to 99.96 % at 1 A g−1), excellent rate performance (150.3 mAh g−1 at 5 A g−1) and outstanding cycling stability (a reversible capacity of 197.5 mAh g−1 at a current density of 1 A g−1 and a low capacity loss per cycle of 0.11‰ during 3000 cycles). Moreover, the charge storage mechanism was systematically investigated by ex‐situ FT‐IR, ex‐situ XPS and DFT calculations. The results clearly reveal the structure‐property relationship of the bipolar‐molecules, providing a new platform to develop efficient bipolar materials for dual‐ion batteries. 10.1002/cssc.202301809 http://onlinelibrary.wiley.com/termsAndConditions#vor |
| title | Design and Synthesis of Viologen‐based Copolymers for High Performance Li‐Dual‐Ion Batteries |
| topic | ChemSusChem |
| url | https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/cssc.202301809 |