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Title: Silver-Intermediated Perovskite La 0.9FeO 3–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 La 0.9FeO 3–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 Fe 4+; 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 Li 2O 2 was observed during discharge on the Ag@LFO cathode, which is beneficial for decomposition during recharge, whereas Li 2O 2 generated on the LFO cathode was largely toroidal. Density functional theory calculations were used to discuss the Li 2O 2 growth mechanism. As a result, compared to La 0.9FeO 3–δ and post-loading silver-decorated La 0.9FeO 3–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:
 [1];  [1]; ORCiD logo [1];  [1]; ORCiD logo [1];  [1];  [2];  [3];  [1]; ORCiD logo [1];  [1]
  1. Jilin Univ., Changchun (China)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. 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. 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, and Feng, Shouhua. Mon . "Silver-Intermediated Perovskite La0.9FeO3–δ toward High-Performance Cathode Catalysts for Nonaqueous Lithium–Oxygen Batteries". United States. doi:10.1021/acscatal.9b03088.
@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 = {2019},
month = {11}
}

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This content will become publicly available on November 11, 2020
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