Bismuth ferrite: An abnormal perovskite with electrochemical extraction of ions from A site

Chao Jie Ma, Ya Chen, Cheng Zhu, Qi Chen, Wei Li Song*, Shuqiang Jiao, Haosen Chen, Daining Fang

*此作品的通讯作者

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摘要

Perovskite materials (ABX3) are significant for energy storage and conversion, and most of the electrochemical processes are currently known to link with the reaction from the active B site. Here, a novel electrochemical active reaction is observed from the A site in perovskite bismuth ferrite (BiFeO3) nanoparticles. With bismuth ion extraction from the A site, single-phase BiFeO3 is found to convert into two phases, namely, Bi2O3 and residual Bi-deficient BiFeO3, and these irreversible products undergo additional separate electrochemical processes in the subsequent cycles. The fundamental understanding suggests that the extracted Bi3+ ions play a dominant role in the electrochemical process via redox reactions of Bi3+ Bi2+ Bi0. Interestingly, such an electrochemical reaction involving the A site could also be suppressed via heteroatom doping at the A site (yttrium ions), which effectively supports the mechanism of ion extraction. The perspectives for the novel mechanism in electrochemical energy storage are further discussed.

源语言英语
页(从-至)12176-12190
页数15
期刊Journal of Materials Chemistry A
7
19
DOI
出版状态已出版 - 2019

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Ma, C. J., Chen, Y., Zhu, C., Chen, Q., Song, W. L., Jiao, S., Chen, H., & Fang, D. (2019). Bismuth ferrite: An abnormal perovskite with electrochemical extraction of ions from A site. Journal of Materials Chemistry A, 7(19), 12176-12190. https://doi.org/10.1039/c9ta02569c