CMK-3/Sulfur Composite (C_xS_y) and Room-Temperature Na/S Battery

Authors

Qing ZHAO, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, No. 94 Weijin Road, Tianjin 300071, China;
Yu-Xiang HU, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, No. 94 Weijin Road, Tianjin 300071, China;
Kai ZHANG, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, No. 94 Weijin Road, Tianjin 300071, China;
Li-Jiang WANG, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, No. 94 Weijin Road, Tianjin 300071, China;
Zhan-Liang TAO, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, No. 94 Weijin Road, Tianjin 300071, China;
Jun CHEN, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, No. 94 Weijin Road, Tianjin 300071, China;Follow

Corresponding Author

Jun CHEN(chenabc@nankai.edu.cn)

Abstract

A series of ordered mesoporous carbon (CMK-3)/sulfur composite (C_xS_y) with different sulfur contents were synthesized via a melt-diffusion method. XRD, Raman, BET, SEM, and TEM techniques were used to characterize the structure and morphology of the as-prepared composite. The electrochemical performance of CMK-3/sulfur composite as the electrode of Na/S battery was tested at room temperature. Cyclic voltammograms show that one obvious reduction peak was located at about 1.61V, which is corresponding to the formation of Na₂S_x (x=2~5), while two oxidation peaks were displayed at about 1.82V and 1.95V, which are belonging to the decomposition of Na₂S_x (x=2~5). When the sulfur content in CMK-3/sulfur composite was 50 wt% (C₁S₁), the discharge capacity reached 500 mAh·g^-1 under 0.05C (1C=558 mAh·g^-1) rate in the first cycle and the capacity became 305.6 mAh·g?1 after 50 cycles. From the result of EIS tested at about 1.6 V under different temperatures, the activation energy was calculated to be 21.83 kJ·mol^-1. This result provides the basis for further study of porous electrode materials for room-temperature Na/S battery.

Graphical Abstract

Keywords

ordered mesoporous carbon, CMK-3/S composite, room-temperature, Na/S battery

DOI Link

https://doi.org/10.13208/j.electrochem.130363

Publication Date

2013-12-28

Online Available Date

2013-12-23

Revised Date

2013-07-17

Received Date

2013-06-26

Recommended Citation

Qing ZHAO, Yu-Xiang HU, Kai ZHANG, Li-Jiang WANG, Zhan-Liang TAO, Jun CHEN. CMK-3/Sulfur Composite (C_xS_y) and Room-Temperature Na/S Battery[J]. Journal of Electrochemistry, 2013 , 19(6): 544-549.
DOI: 10.13208/j.electrochem.130363
Available at: https://jelectrochem.xmu.edu.cn/journal/vol19/iss6/7