基于富缺陷超细电催化剂的500 mW cm-2水下Zn-H2O2电池
500-mW cm-2 underwater Zn-H2O2 batteries with ultrafine edge-enriched electrocatalysts
周猛 1符奎 1邢沂海 1刘建灵 1孟凡成 1魏香凤 1刘节华2
作者信息
- 1. Future Energy Laboratory,School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China
- 2. 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
- 折叠
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.
Abstract
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.
关键词
electrocatalyst/biomass/oxygen reduction reaction/Zn-air cell/Zn-H2O2 batteryKey words
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基金项目
National Natural Science Foundation of China(U1832136)
National Natural Science Foundation of China(21303038)
Intelligent Manufacturing Institute of Hefei University of Technology Project for Scientific and Technological Achievements()
Fundamental Research Funds for the Central Universities(JZ2020HGQA0149)
Fundamental Research Funds for the Central Universities(PA2022GDGP0029)
Fundamental Research Funds for the Central Universities(PA2023GDGP0042)
Anhui Natural Science Foundation Project(2308085ME140)
出版年
2024
NETL
NSTL
万方数据