Facile method of preparation of carbon nanotubes based aerogels as cathodes for lithium-oxygen cells

被引:5
作者
Kopiec, Denis [1 ]
Wrobel, Pawel S. [2 ,3 ]
Szeluga, Urszula [2 ]
Kierzek, Krzysztof [1 ]
机构
[1] Wroclaw Univ Sci & Technol, Fac Chem, Dept Proc Engn & Technol Polymer & Carbon Mat, Gdanska 7-9, PL-50344 Wroclaw, Poland
[2] Polish Acad Sci, Ctr Polymer & Carbon Mat, M Curie Sklodowska 34, PL-41819 Zabrze, Poland
[3] PORT Polish Ctr Technol Dev, Lukasiewicz Res Network, Stablowicka 147, PL-54066 Wroclaw, Poland
关键词
Lithium -oxygen battery; Carbon aerogels; CNT; Free-standing cathode; Energy storage; ELECTROCHEMICAL PROPERTIES; AIR ELECTRODES; PERFORMANCE; BATTERIES; OPTIMIZATION; POROSITY;
D O I
10.1016/j.jpowsour.2024.234501
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Lithium oxygen cells (Li-O2 cells) are considered one of the most promising solutions to the constantly growing demand for energy storage capacity, mainly in the electric vehicle and industrial energy storage sectors, due to their extremely high energy density resulting from the semi-open system in which these cells operate, and the type of reactions taking place during discharging and charging (ORR and OER, respectively). However, potential of the Li-O2 cell is heavily limited by the sluggish kinetics of electrode reactions and the possible side reactions occurring during the work of the cell. The development of an effective cathode is one of the possible solutions to address this challenge. Carbon nanotubes (CNT), have been proposed for cathode application because of their good electrical conductivity, relatively high surface area, and high catalytic activity in ORR and OER. To facilitate those favorable characteristics of CNT, the development of a free-standing cathode could further enhance the performance of Li-O2 cells. In this work, the facile method for the preparation of CNT aerogels, via intensive homogenization and freeze-drying, is presented. The influence of the precursor concentration on the porous structure of obtained aerogels is analyzed. Furthermore, the correlation between concentration, porosity, and electrochemical performance is discussed.
引用
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页数:10
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