基于富缺陷超细电催化剂的500 mW cm-2水下Zn-H2O2电池

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中文摘要：水系金属-H2O2电池作为新兴的动力电池,因其理论能量密度大,在各种应用领域受到关注,特别是水下环境.然而,由于金属的自腐蚀现象,大多数基于Mg/Al或其合金的金属-H2O2电池的峰值功率密度小于300 mW cm-2.本文报道了一种基于多功能单细胞链生物质合成超细豆荚状ZnCo/N掺杂电催化剂的方法,并成功应用于高功率Zn-H2O2电池.电催化剂在皱褶界面上提供了丰富的催化活性位点,并且,由于采用的根状碳纳米管阵列,缩短了电子/离子转移路径.因此,优化后的电催化剂表现出优异的ORR活性,具有较高的E1/2(0.90 V)和Eonset(1.01 V)值.更重要的是,Zn-H2O2电池实现了创纪录的510mWcm-2的最大功率密度和953 Wh kg-1的高比能密度.

外文标题：500-mW cm-2 underwater Zn-H2O2 batteries with ultrafine edge-enriched electrocatalysts

外文摘要：Aqueous metal-H2O2 cells are emerging as power batteries because of their large theoretical energy den-sities and multiple application scenarios,especially in under-water environments.However,the peak power densities are less than 300 mW cm-2 for most reported metal-H2O2 cells based on Mg/Al or their alloys due to the self-corrosion.Herein,we reported a Zn-H2O2 cell with ultrafine bean-pod-like ZnCo/N-doped electrocatalysts that were synthesized via multifunctional single-cell-chain biomass.The electrocatalyst provides abundant active sites on the crinkly interface and offers a shortened pathway for electron/ion transfer due to the desired root-like carbon nanotube(CNT)arrays.Therefore,the optimized electrocatalyst exhibited outstanding oxygen reduction reaction(ORR)activity,with high E1/2(0.90 V)and Eonset(1.01 V)values.More importantly,Zn-H2O2 batteries achieve a record-breaking peak-power density of 510 mW cm-2 and a high specific energy density of 953 Wh kg-1.

外文关键词：

electrocatalystbiomassoxygen reduction reactionZn-air cellZn-H2O2 battery

作者：

周猛、符奎、邢沂海、刘建灵、孟凡成、魏香凤、刘节华

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作者单位：

Future Energy Laboratory,School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China

Key Laboratory of Advanced Functional Materials and Devices of Anhui Province,Hefei 230009,China

Engineering Research Center of High-Performance Copper Alloy Materials and Processing,Ministry of Education,Hefei 230009,China

关键词：

electrocatalyst biomass oxygen reduction reaction Zn-air cell Zn-H2O2 battery

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaIntelligent Manufacturing Institute of Hefei University of Technology Project for Scientific and Technological AchievementsFundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central UniversitiesAnhui Natural Science Foundation Project

项目编号：

U183213621303038JZ2020HGQA0149PA2022GDGP0029PA2023GDGP00422308085ME140

出版年：

2024

DOI：

10.1007/s40843-024-2990-1

中国科学:材料科学(英文)

CSTPCD

ISSN：

年,卷(期)：2024.67(9)