Supramolecular Polymer Intertwined Free-Standing Bifunctional Membrane Catalysts for All-Temperature Flexible Zn-Air Batteries

作     者：Nayantara K.Wagh Sambhaji S.Shinde Chi Ho Lee Sung-Hae Kim Dong-Hyung Kim Han-Don Um Sang Uck Lee Jung-Ho Lee Nayantara K.Wagh;Sambhaji S.Shinde;Chi Ho Lee;Sung-Hae Kim;Dong-Hyung Kim;Han-Don Um;Sang Uck Lee;Jung-Ho Lee

作者机构：Department of Materials Science and Chemical EngineeringHanyang UniversityAnsanRepublic of Korea Department of Applied ChemistryCenter for Bionano Intelligence Education and ResearchHanyang UniversityAnsanRepublic of Korea Department of Chemical EngineeringKangwon National UniversityChuncheonGangwon 24341Republic of Korea 

出 版 物：《Nano-Micro Letters》 (纳微快报（英文版）)

年 卷 期：2022年第14卷第11期

页      面：341-360页

核心收录：

学科分类：0808[工学-电气工程] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：supported by the Creative Materials Discovery Program (Grant No. 2018M3D1A1057844) through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT the Basic Science Research Program through the NRF funded by the Ministry of Science, ICT and Future Planning (Grant No. 2021R1A2B5B01002879) 

主　　题：Flexible free-standing membrane electrocatalysts Supramolecular polymer Alkaline and flexible solid-state Zn-air batteries All-temperature operations High capacity and energy density 

摘      要：Rational construction of flexible free-standing electrocatalysts featuring long-lasting durability,high efficiency,and wide temperature tolerance under harsh practical operations are fundamentally significant for commercial zinc-air ***,3D flexible free-standing bifunctional membrane electrocatalysts composed of covalently cross-linked supramolecular polymer networks with nitrogen-deficient carbon nitride nanotubes are fabricated(referred to as PEMAC@NDCN)by a facile self-templated ***@NDCN demonstrates the lowest reversible oxygen bifunctional activity of 0.61 V with exceptional long-lasting durability,which outperforms those of commercial Pt/C and RuO_(2).Theoretical calculations and control experi-ments reveal the boosted electron transfer,electrolyte mass/ion transports,and abundant active surface site ***,the constructed alkaline Zn-air battery with PEMAC@NDCN air-cathode reveals superb power density,capacity,and discharge-charge cycling stability(over 2160 cycles)compared to the reference Pt/C+RuO_(2).Solid-state Zn-air batteries enable a high power density of 211 mW cm^(−2),energy density of 1056 Wh kg^(−1),stable charge-discharge cycling of 2580 cycles for 50 mA cm^(−2),and wide temperature tolerance from−40 to 70℃with retention of 86%capacity compared to room-temperature counterparts,illustrating prospects over harsh operations.