首页|Maneuverable B-site cation in perovskite tuning anode reaction kinetics in vanadium redox flow batteries

Maneuverable B-site cation in perovskite tuning anode reaction kinetics in vanadium redox flow batteries

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The actual performance of vanadium redox flow batteries(VRFBs)is still significantly constrained by the slow kinetics and major parasitic reactivity of anode issues.Herein,a B-site management strategy of SrBO3(B=Ti,Zr,Hf)perovskites was proposed to promote the anode reaction jointly explored by ex-periments and first-principle calculations.As the atomic number of B increases,the enhanced polarity of the B-O bond and the increased oxygen defect can boost the adsorption of vanadium ions,while the weakened orbital hybridization of the B-O bond facilitates the charge transfer of anode reaction.Com-pared with SrTiO3 and SrZrO3,oversized particles and deformed crystals of SrHfO3 reduce its catalysis.Of SrBO3 perovskites,SrZrO3 stands out in catalysis,owing to its outstanding combination of high hy-drophilicity,large surface area,and desired crystal structure.Further,the VRFB using SrZrO3 presents a superior energy efficiency(EE)of 63.2％at 300 mA cm-2 and an increase of 15％in EE compared with the pristine cell at 200 mA cm-2.This work lays the foundation for building the connections between the structural and compositional flexibility and the tunable perovskite properties desirable for vanadium redox reactions.

Vanadium redox flow batteryPerovskiteCatalystReaction kineticsAnode

Yingqiao Jiang、Zihe Liu、Yujie Ren、Ao Tang、Lei Dai、Ling Wang、Suqin Liu、Yongguang Liu、Zhangxing He

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School of Chemical Engineering,North China University of Science and Technology,Tangshan 063009,China

Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China

College of Chemistry and Chemical Engineering,Central South University,Changsha 410083,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaHebei Natural Science Fund for Distinguished Young ScholarYouth Talent Program of Hebei Provincial Education DepartmentNatural Science Foundation of Hebei ProvinceNatural Science Foundation of Liaoning Province

5187209051772097E2019209433BJ2018020E20202091512020-MS-012

2024

10.1016/j.jmst.2023.12.005

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.186(19)
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