Highly Efficient and Non-Precious Metal for the Li-SOCl2 Battery Using Nitrogen Doped Carbon Supported Cu Nanoparticles

Published in J Electrochem Soc, 2019

Chao Du, Yongii Guan, Shimin Liu, Wenpeng Ni, Junjie Pei, Wei Zhang, Xiaoping Zhang, Youquan Deng. J Electrochem Soc, 2019, 166 (4), A641-A648.

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Abstract

For lithium thionyl chloride batteries, the catalytic activity of the cathode material plays a crucial role in its electrochemical performance. In this paper, a poly (1-vinyl-3-methylimidazolium dicyanamide) ionic liquid (PIL) is selected as precursor to support CuO nanoparticles, and an efficient, non-precious metal nitrogen doped carbon supported Cu nanoparticles (N-C@Cu) composite material is designed and prepared for the lithium thionyl chloride battery cathode catalyst. X-ray diffraction (XRD) and high-resolution transmission electron microscope (HRTEM) verified that the supported CuO nanoparticles is reduced to Cu via carbon which formed from the thermally decompose of PIL. X-ray photoelectron spectroscopy (XPS) images confirm the existence of nitrogen doped carbon and Cu nanoparticles. Raman spectroscopy also demonstrate that the interaction between Cu and N-C provides more active sites. The N-C@Cu composite catalyst exhibits excellent activity in the reduction process of thionyl chloride, as can be seen from the materials display characteristics of lower discharge over-potential, and improved electron transfer of its rate-determining step. The rate performance, operating voltage and discharge capacity are all improved.

Chao Du, Yongii Guan, Shimin Liu, Wenpeng Ni, Junjie Pei, Wei Zhang, Xiaoping Zhang, Youquan Deng. Highly Efficient and Non-Precious Metal for the Li-SOCl2 Battery Using Nitrogen Doped Carbon Supported Cu Nanoparticles. J Electrochem Soc, 2019, 166 (4), A641-A648.