期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 61, 期 51, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202214244
关键词
Energy Gap; Linear Polymer; Organic Zinc-Ion Batteries; Quinone-Based Polymer; Zn2+ Diffusion Coefficient
资金
- National Natural Science Foundation of China
- Natural Science Foundation of Jiangsu Province
- National Key Research and Development Program of China
- State Key Laboratory of New Ceramic and Fine Processing of Tsinghua University
- Fundamental Research Funds for the Central Universities
- [52171203]
- [51872051]
- [BK20211516]
- [2021YFB2400400]
- [KF202102]
- [2242022R10090]
A novel poly(phenazine-alt-pyromellitic anhydride) (PPPA) has been synthesized as a promising cathode material in organic zinc-ion batteries. The PPPA cathode exhibits a reversible Zn2+-coordination mechanism and an ultrahigh Zn2+ diffusion coefficient, which is the highest among all organic cathode materials for zinc-ion batteries. The extended pi-conjugated plane in PPPA sample contributes to a significant reduction in energy gap, promoting intramolecular electron transfer during charge/discharge process.
A novel poly(phenazine-alt-pyromellitic anhydride) (PPPA) has been successfully designed and synthesized via a condensation polymerization strategy as promising cathode material in organic zinc-ion batteries. Electrochemical quartz crystal microbalance (EQCM), FTIR and XPS characterizations verify a reversible Zn2+-coordination mechanism in our PPPA cathode. Intriguingly, an ultrahigh Zn2+ diffusion coefficient of 1.2x10(-7) cm(2) s(-1) was found in this large pi-conjugated system, which is the highest one among all organic cathode materials for zinc-ion batteries. Theoretical calculations reveal the extended pi-conjugated plane in our PPPA sample results in a significant reduction on energy gap, effectively accelerating intramolecular electron transfer during charge/discharge process. Our finding provides insights to achieve high zinc-ion transport kinetics by a design strategy on planar polymer system.
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