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Easily Decomposed Discharge Products Induced by Cathode Construction for Highly Energy-Efficient Lithium-Oxygen Batteries
Fu, Jingming; Guo, Xiangxin; Huo, Hanyu; Chen, Yue; Zhang, Tao
2019-04-24
Source PublicationACS APPLIED MATERIALS & INTERFACES
ISSN1944-8244
Volume11Issue:16Pages:14803
SubtypeArticle
AbstractThe lithium-oxygen (Li-O-2) battery is deemed as a promising candidate for the next-generation of energy storage system due to its ultrahigh theoretical energy density. However, low energy efficiency and inferior cycle stability induced by the sluggish kinetics of charge transfer in discharge products limit its further development in practical application. In this work, tin dioxide (SnO2) nanoparticles decorated carbon nanotubes (SnO2/CNTs) have been constructed as composite cathodes to manipulate the morphology and component of discharge products in Li-O-2 batteries. Owing to the strong oxygen adsorption of SnO2, oxygen-reduction reactions tend to occur on composite cathode surfaces, resulting in the formation of flake-like discharge products of Li2-xO2 less than 10 nm in thickness rather than toroidal particles of several hundred nanometers. Such homogeneous nanosized discharge products with lithium vacancies markedly enhance the electrode kinetics and charge transfer in discharge products. Consequently, the Li-O-2 batteries based on the SnO2/CNT cathodes show a small polarization voltage gap, which leads to superior energy efficiency (80%) compared with that based on pristine CNT cathodes. The results demonstrate that optimizing the discharge products with nanosized morphology and defective component by cathode construction is an effective strategy to realize the Li-O-2 batteries with increased energy efficiency and improved cycle stability.
KeywordLi-O-2 batteries SnO2/CNTs cathode construction size effect defects energy efficiency
DOI10.1021/acsami.9b01673
Language英语
WOS Research AreaScience & Technology - Other Topics ; Materials Science
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27167
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Fu, Jingming,Guo, Xiangxin,Huo, Hanyu,et al. Easily Decomposed Discharge Products Induced by Cathode Construction for Highly Energy-Efficient Lithium-Oxygen Batteries[J]. ACS APPLIED MATERIALS & INTERFACES,2019,11(16):14803.
APA Fu, Jingming,Guo, Xiangxin,Huo, Hanyu,Chen, Yue,&Zhang, Tao.(2019).Easily Decomposed Discharge Products Induced by Cathode Construction for Highly Energy-Efficient Lithium-Oxygen Batteries.ACS APPLIED MATERIALS & INTERFACES,11(16),14803.
MLA Fu, Jingming,et al."Easily Decomposed Discharge Products Induced by Cathode Construction for Highly Energy-Efficient Lithium-Oxygen Batteries".ACS APPLIED MATERIALS & INTERFACES 11.16(2019):14803.
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