Silver-Intermediated Perovskite La0.9FeO3–δ toward High-Performance Cathode Catalysts for Nonaqueous Lithium–Oxygen Batteries
Abstract
Development of efficient cathode catalysts is crucial for achieving high-performance rechargeable lithium–oxygen batteries. Herein, a simple one-step electrospun method was applied to obtain a silver-modified perovskite La0.9FeO3–δ (Ag@LFO) as an efficient cathode catalyst. The synthesized catalyst has two characteristics: first, the doping of Ag led to a tailored electronic structure including the generation of Fe4+; second, the in situ grown Ag exhibits a stronger interaction with perovskite. These two advantages result in high oxygen adsorbability and increased percentage of highly active oxygen species. Furthermore, film-like Li2O2 was observed during discharge on the Ag@LFO cathode, which is beneficial for decomposition during recharge, whereas Li2O2 generated on the LFO cathode was largely toroidal. Density functional theory calculations were used to discuss the Li2O2 growth mechanism. As a result, compared to La0.9FeO3–δ and post-loading silver-decorated La0.9FeO3–δ (Ag/LFO), Ag@LFO exhibits lower overpotential, improved rate-capability, higher discharge specific capacity, and especially promoted cycling performance that is triple that of LFO.
- Authors:
-
- Jilin Univ., Changchun (China)
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Chinese Academy of Sciences, Changchun (China)
- Publication Date:
- Research Org.:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1595245
- Grant/Contract Number:
- AC02-76SF00515; 10183201816; 21427802; 21671076; 21831003; 2019-02
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ACS Catalysis
- Additional Journal Information:
- Journal Volume: 9; Journal Issue: 12; Journal ID: ISSN 2155-5435
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE; Li−O2; battery; silver; perovskite; interaction; catalyst
Citation Formats
Cong, Yingge, Tang, Qi, Wang, Xiyang, Liu, Milan, Liu, Jinghai, Geng, Zhibin, Cao, Rui, Zhang, Xinbo, Zhang, Wei, Huang, Keke, and Feng, Shouhua. Silver-Intermediated Perovskite La0.9FeO3–δ toward High-Performance Cathode Catalysts for Nonaqueous Lithium–Oxygen Batteries. United States: N. p., 2019.
Web. doi:10.1021/acscatal.9b03088.
Cong, Yingge, Tang, Qi, Wang, Xiyang, Liu, Milan, Liu, Jinghai, Geng, Zhibin, Cao, Rui, Zhang, Xinbo, Zhang, Wei, Huang, Keke, & Feng, Shouhua. Silver-Intermediated Perovskite La0.9FeO3–δ toward High-Performance Cathode Catalysts for Nonaqueous Lithium–Oxygen Batteries. United States. https://doi.org/10.1021/acscatal.9b03088
Cong, Yingge, Tang, Qi, Wang, Xiyang, Liu, Milan, Liu, Jinghai, Geng, Zhibin, Cao, Rui, Zhang, Xinbo, Zhang, Wei, Huang, Keke, and Feng, Shouhua. Mon .
"Silver-Intermediated Perovskite La0.9FeO3–δ toward High-Performance Cathode Catalysts for Nonaqueous Lithium–Oxygen Batteries". United States. https://doi.org/10.1021/acscatal.9b03088. https://www.osti.gov/servlets/purl/1595245.
@article{osti_1595245,
title = {Silver-Intermediated Perovskite La0.9FeO3–δ toward High-Performance Cathode Catalysts for Nonaqueous Lithium–Oxygen Batteries},
author = {Cong, Yingge and Tang, Qi and Wang, Xiyang and Liu, Milan and Liu, Jinghai and Geng, Zhibin and Cao, Rui and Zhang, Xinbo and Zhang, Wei and Huang, Keke and Feng, Shouhua},
abstractNote = {Development of efficient cathode catalysts is crucial for achieving high-performance rechargeable lithium–oxygen batteries. Herein, a simple one-step electrospun method was applied to obtain a silver-modified perovskite La0.9FeO3–δ (Ag@LFO) as an efficient cathode catalyst. The synthesized catalyst has two characteristics: first, the doping of Ag led to a tailored electronic structure including the generation of Fe4+; second, the in situ grown Ag exhibits a stronger interaction with perovskite. These two advantages result in high oxygen adsorbability and increased percentage of highly active oxygen species. Furthermore, film-like Li2O2 was observed during discharge on the Ag@LFO cathode, which is beneficial for decomposition during recharge, whereas Li2O2 generated on the LFO cathode was largely toroidal. Density functional theory calculations were used to discuss the Li2O2 growth mechanism. As a result, compared to La0.9FeO3–δ and post-loading silver-decorated La0.9FeO3–δ (Ag/LFO), Ag@LFO exhibits lower overpotential, improved rate-capability, higher discharge specific capacity, and especially promoted cycling performance that is triple that of LFO.},
doi = {10.1021/acscatal.9b03088},
journal = {ACS Catalysis},
number = 12,
volume = 9,
place = {United States},
year = {Mon Nov 11 00:00:00 EST 2019},
month = {Mon Nov 11 00:00:00 EST 2019}
}
Web of Science