Details

Autor(en) / Beteiligte

• Guo, Can
• Zhou, Jie
• Chen, Yuting
• Zhuang, Huifen
• Li, Qi
• Li, Jie
• Tian, Xi
• Zhang, Yuluan
• Yao, Xiaoman
• Chen, Yifa
• Li, Shun‐Li
• Lan, Ya‐Qian

Titel

Synergistic Manipulation of Hydrogen Evolution and Zinc Ion Flux in Metal‐Covalent Organic Frameworks for Dendrite‐free Zn‐based Aqueous Batteries

Ist Teil von

• Angewandte Chemie International Edition, 2022-10, Vol.61 (41), p.e202210871-n/a

Auflage

International ed. in English

Ort / Verlag

Weinheim: Wiley Subscription Services, Inc

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Zn‐based aqueous batteries have attracted much attention because of their high theoretical‐capacity, safety, and low‐cost, yet the H2‐evolution, qualification or inhibition mechanism investigations that are closely related to the dendrite‐growth are rare and challenging. Herein, a series of zincophilic metal‐covalent organic frameworks (e.g., Zn‐AAn‐COF, Zn‐DAAQ‐COF, and Zn‐DAA‐COF) have been explored as model‐platforms to manipulate the H2‐evolution and Zn2+ flux. Best of them, Zn‐AAn‐COF based cell only produces 0.002 mmol h−1 cm−2 H2, which is >2 orders of magnitude lower than bare Zn. Noteworthy, it affords high stability for 3000 cycles (overpotential, <79.1 mV) at 20 mA cm−2 in symmetric‐cell and enhanced cycling‐stability up to 6000 cycles at 2000 mA g−1 in the assembled full‐battery. Besides, mechanistic characterizations show that Zn‐AAn‐COF can enhance the energy‐barrier of H2‐evolution and homogenize the ion‐distribution or electric‐filed to achieve high performance. A series of porous Zn‐COF@Zn anodes have been fabricated to synergistically manipulate the H2 evolution and Zn2+ flux, during which the closely related H2 qualification/inhibition and Zn dendrite‐growth in zinc‐based aqueous batteries have been studied.