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A Truxenone-based Covalent Organic Framework as an All-Solid-State Lithium-Ion Battery Cathode with High Capacity |
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| Authors: | Dr Xiye Yang Yiming Hu Nathan Dunlap Xubo Wang Shaofeng Huang Zhiping Su Prof Sandeep Sharma Dr Yinghua Jin Prof Fei Huang Prof Xiaohui Wang Prof Se-hee Lee Prof Wei Zhang |
| Institution: | 1. State Key Laboratory of Pulp and Paper Engineering, Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640 P. R. China
Department of Chemistry, University of Colorado, Boulder, Boulder, CO, 80309 USA These authors contributed equally to this work.;2. Department of Chemistry, University of Colorado, Boulder, Boulder, CO, 80309 USA These authors contributed equally to this work.;3. Department of Mechanical Engineering, University of Colorado, Boulder, Boulder, CO, 80309 USA;4. Department of Chemistry, University of Colorado, Boulder, Boulder, CO, 80309 USA;5. State Key Laboratory of Pulp and Paper Engineering, Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640 P. R. China |
| Abstract: | All-solid-state lithium ion batteries (LIBs) are ideal for energy storage given their safety and long-term stability. However, there is a limited availability of viable electrode active materials. Herein, we report a truxenone-based covalent organic framework (COF-TRO) as cathode materials for all-solid-state LIBs. The high-density carbonyl groups combined with the ordered crystalline COF structure greatly facilitate lithium ion storage via reversible redox reactions. As a result, a high specific capacity of 268 mAh g−1, almost 97.5 % of the calculated theoretical capacity was achieved. To the best of our knowledge, this is the highest capacity among all COF-based cathode materials for all-solid-state LIBs reported so far. Moreover, the excellent cycling stability (99.9 % capacity retention after 100 cycles at 0.1 C rate) shown by COF-TRO suggests such truxenone-based COFs have great potential in energy storage applications. |
| Keywords: | covalent organic frameworks high capacity lithium-ion batteries multiple-electron redox truxenone |