Kinetic insight into perovskite La0.8Sr0.2VO3 nanofibers as an efficient electrocatalytic cathode for high‐rate LiO2 batteries
Abstract Efficient electrocatalysis at the cathode is essential for overcoming the limitations of LiO2 batteries such as poor stability and low rate capability. Herein, we systematically studied the kinetic behavior of a LiO2 battery comprising perovskite La0.8Sr0.2VO3 nanofibers formed by partial...
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oai:doaj.org-article:2915b7c2d6b94b76be28016edd7f47c72021-11-16T06:26:53ZKinetic insight into perovskite La0.8Sr0.2VO3 nanofibers as an efficient electrocatalytic cathode for high‐rate LiO2 batteries2567-316510.1002/inf2.12243https://doaj.org/article/2915b7c2d6b94b76be28016edd7f47c72021-11-01T00:00:00Zhttps://doi.org/10.1002/inf2.12243https://doaj.org/toc/2567-3165Abstract Efficient electrocatalysis at the cathode is essential for overcoming the limitations of LiO2 batteries such as poor stability and low rate capability. Herein, we systematically studied the kinetic behavior of a LiO2 battery comprising perovskite La0.8Sr0.2VO3 nanofibers formed by partial Sr‐cation doping and V cations with multiple oxidation states. Compared with undoped LaVO3 and La0.8Sr0.2VO4 nanofibers, perovskite La0.8Sr0.2VO3 nanofibers exhibited an improved capacity of 2000 mA g−1, and a 20‐times‐longer cycle life in LiO2 batteries. X‐ray photoelectron spectroscopy, electron paramagnetic resonance spectroscopy, and photoluminescence analyses revealed that the performance variations mainly originated from crystal defects, which modulate oxygen reduction/evolution kinetics. Through in situ Raman analysis, we showed that these structural defects are closely related to the oxygen reduction/evolution behavior of La0.8Sr0.2VO3 nanofibers and result in fewer parasitic reactions. This study offers insights into the potential rate capability of LiO2 batteries and related devices.Myeong‐Chang SungGwang‐Hee LeeDong‐Wan KimWileyarticleelectrocatalystsLa0.8Sr0.2VO3LiO2 batterynanofiberperovskite structureMaterials of engineering and construction. Mechanics of materialsTA401-492Information technologyT58.5-58.64ENInfoMat, Vol 3, Iss 11, Pp 1295-1310 (2021) |
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DOAJ |
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DOAJ |
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EN |
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electrocatalysts La0.8Sr0.2VO3 LiO2 battery nanofiber perovskite structure Materials of engineering and construction. Mechanics of materials TA401-492 Information technology T58.5-58.64 |
| spellingShingle |
electrocatalysts La0.8Sr0.2VO3 LiO2 battery nanofiber perovskite structure Materials of engineering and construction. Mechanics of materials TA401-492 Information technology T58.5-58.64 Myeong‐Chang Sung Gwang‐Hee Lee Dong‐Wan Kim Kinetic insight into perovskite La0.8Sr0.2VO3 nanofibers as an efficient electrocatalytic cathode for high‐rate LiO2 batteries |
| description |
Abstract Efficient electrocatalysis at the cathode is essential for overcoming the limitations of LiO2 batteries such as poor stability and low rate capability. Herein, we systematically studied the kinetic behavior of a LiO2 battery comprising perovskite La0.8Sr0.2VO3 nanofibers formed by partial Sr‐cation doping and V cations with multiple oxidation states. Compared with undoped LaVO3 and La0.8Sr0.2VO4 nanofibers, perovskite La0.8Sr0.2VO3 nanofibers exhibited an improved capacity of 2000 mA g−1, and a 20‐times‐longer cycle life in LiO2 batteries. X‐ray photoelectron spectroscopy, electron paramagnetic resonance spectroscopy, and photoluminescence analyses revealed that the performance variations mainly originated from crystal defects, which modulate oxygen reduction/evolution kinetics. Through in situ Raman analysis, we showed that these structural defects are closely related to the oxygen reduction/evolution behavior of La0.8Sr0.2VO3 nanofibers and result in fewer parasitic reactions. This study offers insights into the potential rate capability of LiO2 batteries and related devices. |
| format |
article |
| author |
Myeong‐Chang Sung Gwang‐Hee Lee Dong‐Wan Kim |
| author_facet |
Myeong‐Chang Sung Gwang‐Hee Lee Dong‐Wan Kim |
| author_sort |
Myeong‐Chang Sung |
| title |
Kinetic insight into perovskite La0.8Sr0.2VO3 nanofibers as an efficient electrocatalytic cathode for high‐rate LiO2 batteries |
| title_short |
Kinetic insight into perovskite La0.8Sr0.2VO3 nanofibers as an efficient electrocatalytic cathode for high‐rate LiO2 batteries |
| title_full |
Kinetic insight into perovskite La0.8Sr0.2VO3 nanofibers as an efficient electrocatalytic cathode for high‐rate LiO2 batteries |
| title_fullStr |
Kinetic insight into perovskite La0.8Sr0.2VO3 nanofibers as an efficient electrocatalytic cathode for high‐rate LiO2 batteries |
| title_full_unstemmed |
Kinetic insight into perovskite La0.8Sr0.2VO3 nanofibers as an efficient electrocatalytic cathode for high‐rate LiO2 batteries |
| title_sort |
kinetic insight into perovskite la0.8sr0.2vo3 nanofibers as an efficient electrocatalytic cathode for high‐rate lio2 batteries |
| publisher |
Wiley |
| publishDate |
2021 |
| url |
https://doaj.org/article/2915b7c2d6b94b76be28016edd7f47c7 |
| work_keys_str_mv |
AT myeongchangsung kineticinsightintoperovskitela08sr02vo3nanofibersasanefficientelectrocatalyticcathodeforhighratelio2batteries AT gwangheelee kineticinsightintoperovskitela08sr02vo3nanofibersasanefficientelectrocatalyticcathodeforhighratelio2batteries AT dongwankim kineticinsightintoperovskitela08sr02vo3nanofibersasanefficientelectrocatalyticcathodeforhighratelio2batteries |
| _version_ |
1718426656139378688 |