Citation: Guanghui Yue, Jiandi Liu, Jiangtao Han, Donghui Qin, Qiang Chen, Jianxiong Shao. Amorphous CoSnO₃@rGO nanocomposite as an efficient cathode catalyst for long-life Li-O₂ batteries[J]. Chinese Journal of Catalysis, ;2018, 39(12): 1951-1959. doi: 10.1016/S1872-2067(18)63155-9 shu

Amorphous CoSnO₃@rGO nanocomposite as an efficient cathode catalyst for long-life Li-O₂ batteries

a Department of Materials Science and Engineering, Xiamen University, Xiamen 361005, Fujian, China;
b Department of Electronic Science, Xiamen University, Xiamen 361005, Fujian, China;
c School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, Guansu, China

Received Date: 30 June 2018
Revised Date: 16 August 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (11405144), and the Fundamental Research Funds for the Central Universities (20720180081).

An amorphous CoSnO₃@rGO nanocomposite fabricated using a surfactant-assisted assembly method combined with thermal treatment served as a catalyst for non-aqueous lithium-oxygen (Li-O₂) batteries. In contrast to the specific surface area of the bare CoSnO₃ nanoboxes (104.3 m² g^-1), the specific surface area of the CoSnO₃@rGO nanocomposite increased to approximately 195.8 m² g^-1 and the electronic conductivity also improved. The increased specific surface area provided more space for the deposition of Li₂O₂, while the improved electronic conductivity accelerated the decomposition of Li₂O₂. Compared to bare CoSnO₃, the overpotential reduced by approximately 20 and 60 mV at current densities of 100 and 500 mA g^-1 when CoSnO₃@rGO was used as the catalyst. A Li-O₂ battery using a CoSnO₃@rGO nanocomposite as the cathode catalyst cycled indicated a superior cyclic stability of approximately 130 cycles at a current density of 200 mA g^-1 with a limited capacity of 1000 mAh g^-1, which is 25 cycles more than that of the bare amorphous CoSnO₃ nanoboxes.
- Amorphous CoSnO₃nanoboxe,
- Nanocomposite,
- Li-O₂ battery,
- Cathode catalyst
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Amorphous CoSnO₃@rGO nanocomposite as an efficient cathode catalyst for long-life Li-O₂ batteries