期刊
ENERGY STORAGE MATERIALS
卷 33, 期 -, 页码 283-289出版社
ELSEVIER
DOI: 10.1016/j.ensm.2020.08.027
关键词
Aqueous Zn batteries; Organic electrodes; Anion doping; Bipolar redox; Intermolecular interaction
资金
- AcRF Tier 1 [RG 111/17, RG 2/17, RG 114/16, RG 113/18]
- Strategic Priority Research Program of Chinese Academy of Sciences [XDA22010602]
- National Natural Science Foundation of China [21975271]
- Youth Innovation Promotion Association of CAS [2019214]
- 111 Project [D20015]
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University, P. R. China [sklssm202041]
- AcRF Tier 2 [MOE 2017-T2-1-021, MOE 2018-T2-1-070]
Redox-active organic compounds with accessible redox states and structural diversity are essentially important as promising electrode materials for rechargeable batteries. Herein, we propose a new bipolar redox chemistry that involves anion delocalization and cation localization in a ladder-like polymer ((C6S2O2)(n))-based aqueous Zn-battery. Notably, a unique irreversible electrolyte anion-doping followed by a reversible cation insertion is revealed in (C6S2O2)(n) during the operation of the battery, which works excellent regardless of either charge or discharge is applied first. Due to the in-situ formation of the S center dot center dot center dot S intermolecular interaction, the stabilized battery delivers a fast-charge ability (in 30.6 s) and an ultra-stable cycle-life (> 6000 cycles). The combination results of CV, ex-situ FTIR, EDS elemental mapping and DFT calculations are discussed to confirm the proposed mechanism. This novel redox chemistry provides an effective strategy to design highly stable and long-cycle-life aqueous batteries.
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