Boosting the performance of organic cathodes through structure tuning
The decisive factor to realize high-capacity rechargeable batteries is the cathode. Since the experimental capacity of inorganic cathodes is usually less than 200 mA h g−1, searching for new cathode materials to boost the capacity is highly desirable. Here, we design and synthesize two novel organic...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/140875 |
| _version_ | 1826111026883461120 |
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| author | Xie, Jian Chen, Wangqiao Long, Guankui Gao, Weibo Xu, Jason Zhichuan Liu, Ming Zhang, Qichun |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Xie, Jian Chen, Wangqiao Long, Guankui Gao, Weibo Xu, Jason Zhichuan Liu, Ming Zhang, Qichun |
| author_sort | Xie, Jian |
| collection | NTU |
| description | The decisive factor to realize high-capacity rechargeable batteries is the cathode. Since the experimental capacity of inorganic cathodes is usually less than 200 mA h g−1, searching for new cathode materials to boost the capacity is highly desirable. Here, we design and synthesize two novel organic cathodes, poly(pyrene-4,5,9,10-tetraone) (PPTO) and poly(2,7-ethynylpyrene-4,5,9,10-tetraone) (PEPTO), based on the highly redox-active pyrene-4,5,9,10-tetraone. Due to their four Li+ ion intake characteristics, both cathodes show a large reversible capacity of 234 & 244 mA h g−1 and a high energy density of up to 530 & 507 W h kg−1, respectively. In particular, benefiting from the enhanced conjugation and planarity, PEPTO with the addition of a carbon–carbon triple bond (C[triple bond, length as m-dash]C) delivers a significantly improved rate stability at high current densities and an excellent capacity retention of 110 mA h g−1 after 1000 cycles (at 800 mA g−1). Our approach could provide an effective strategy to prepare new organic cathodes for the next generation of high stability and high energy density organic batteries through structure tuning. |
| first_indexed | 2024-10-01T02:43:52Z |
| format | Journal Article |
| id | ntu-10356/140875 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:43:52Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1408752023-07-14T15:53:23Z Boosting the performance of organic cathodes through structure tuning Xie, Jian Chen, Wangqiao Long, Guankui Gao, Weibo Xu, Jason Zhichuan Liu, Ming Zhang, Qichun School of Materials Science and Engineering School of Physical and Mathematical Sciences Singapore-HUJ Alliance for Research and Enterprise Nanomaterials for Energy and Water Management Campus for Research Excellence and Technological Enterprise Research Techno Plaza Temasek Laboratories Engineering::Materials Organic Cathodes Structure Tuning The decisive factor to realize high-capacity rechargeable batteries is the cathode. Since the experimental capacity of inorganic cathodes is usually less than 200 mA h g−1, searching for new cathode materials to boost the capacity is highly desirable. Here, we design and synthesize two novel organic cathodes, poly(pyrene-4,5,9,10-tetraone) (PPTO) and poly(2,7-ethynylpyrene-4,5,9,10-tetraone) (PEPTO), based on the highly redox-active pyrene-4,5,9,10-tetraone. Due to their four Li+ ion intake characteristics, both cathodes show a large reversible capacity of 234 & 244 mA h g−1 and a high energy density of up to 530 & 507 W h kg−1, respectively. In particular, benefiting from the enhanced conjugation and planarity, PEPTO with the addition of a carbon–carbon triple bond (C[triple bond, length as m-dash]C) delivers a significantly improved rate stability at high current densities and an excellent capacity retention of 110 mA h g−1 after 1000 cycles (at 800 mA g−1). Our approach could provide an effective strategy to prepare new organic cathodes for the next generation of high stability and high energy density organic batteries through structure tuning. Ministry of Education (MOE) Accepted version 2020-06-02T09:20:25Z 2020-06-02T09:20:25Z 2018 Journal Article Xie, J., Chen, W., Long, G., Gao, W., Xu, J. Z., Liu, M., & Zhang, Q. (2018). Boosting the performance of organic cathodes through structure tuning. Journal of Materials Chemistry A, 6(27), 12985-12991. doi:10.1039/c8ta03857k 2050-7488 https://hdl.handle.net/10356/140875 10.1039/c8ta03857k 2-s2.0-85049874327 27 6 12985 12991 en MOE 2017-T2-1-021 Open Project of State Key Laboratory of Supramolecular Structure and Materials (Grant number: sklssm201833), Jilin University, China. Journal of Materials Chemistry A © 2018 The Royal Society of Chemistry. All rights reserved. This paper was published in Journal of Materials Chemistry A and is made available with permission of The Royal Society of Chemistry. application/pdf |
| spellingShingle | Engineering::Materials Organic Cathodes Structure Tuning Xie, Jian Chen, Wangqiao Long, Guankui Gao, Weibo Xu, Jason Zhichuan Liu, Ming Zhang, Qichun Boosting the performance of organic cathodes through structure tuning |
| title | Boosting the performance of organic cathodes through structure tuning |
| title_full | Boosting the performance of organic cathodes through structure tuning |
| title_fullStr | Boosting the performance of organic cathodes through structure tuning |
| title_full_unstemmed | Boosting the performance of organic cathodes through structure tuning |
| title_short | Boosting the performance of organic cathodes through structure tuning |
| title_sort | boosting the performance of organic cathodes through structure tuning |
| topic | Engineering::Materials Organic Cathodes Structure Tuning |
| url | https://hdl.handle.net/10356/140875 |
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