Double-Doped Carbon-Based Electrodes with Nitrogen and Oxygen to Boost the Areal Capacity of Zinc-Bromine Flow Batteries  

作　　者：Xiaoyun Sun Deren Wang Haochen Hu Xin Wei Lin Meng Zhongshan Ren Sensen Li 

机构地区：[1]Institute for Advanced Materials and Technology,University of Science and Technology,Beijing 100083,China [2]School of Physics and Materials Engineering,Hefei Normal University,Hefei 230601,China [3]Jiangsu Heng’an Energy Storage Technology Co.,Ltd.,Beijing 100176,China

出　　处：《Transactions of Tianjin University》2024年第1期74-89,共16页天津大学学报（英文版）

基　　金：supported by Natural Science Foundation of Anhui Higher Education Institution of China(2023AH051318).

摘　　要：Ensuring a stable power output from renewable energy sources,such as wind and solar energy,depends on the development of large-scale and long-duration energy storage devices.Zinc–bromine fl ow batteries(ZBFBs)have emerged as cost-eff ective and high-energy-density solutions,replacing expensive all-vanadium fl ow batteries.However,uneven Zn deposition during charging results in the formation of problematic Zn dendrites,leading to mass transport polarization and self-discharge.Stable Zn plating and stripping are essential for the successful operation of high-areal-capacity ZBFBs.In this study,we successfully synthesized nitrogen and oxygen co-doped functional carbon felt(NOCF4)electrode through the oxidative polymerization of dopamine,followed by calcination under ambient conditions.The NOCF4 electrode eff ectively facilitates effi cient“shuttle deposition”of Zn during charging,signifi cantly enhancing the areal capacity of the electrode.Remarkably,ZBFBs utilizing NOCF4 as the anode material exhibited stable cycling performance for 40 cycles(approximately 240 h)at an areal capacity of 60 mA h/cm^(2).Even at a high areal capacity of 130 mA h/cm^(2),an impressive energy effi ciency of 76.98%was achieved.These fi ndings provide a promising pathway for the development of high-areal-capacity ZBFBs for advanced energy storage systems.

关 键 词：Zinc-bromine fl ow batteries N O co-doping Areal capacity Shuttle deposition Zinc dendrite 

分 类 号：O646.54[理学—物理化学] TM912[理学—化学]