Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 168, Issue 10, Pages -Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1945-7111/ac2f06
Keywords
Lithium; thionyl chloride battery; Phthalocyanine; Activated carbon; Voltage platform; LiCl film
Funding
- Shaanxi Natural Science Foundation of China [2019JLM-3]
- Academic Team funding of Shaanxi University of Science and Technology [XSD1445]
- Provincial Key Academic Leaders Scientific Research Foundation of Shaanxi University of Science and Technology [BJ15-01]
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A FePc/AC catalyst was synthesized using a solid-state approach for the reduction reaction of SOCl2 in lithium/thionyl chloride batteries. The FePc/AC catalyst significantly increased the average voltage of the battery and formed a nano-scale LiCl film, facilitating micro-diffusion of the electrolyte SOCl2.
Efficient catalysts for the reduction reaction of SOCl2 are desired for lithium/thionyl chloride batteries with high and stable voltage. In this work, iron phthalocyanine particulates fixed on activated carbon substrates (FePc/AC) are synthesized by an in situ solid approach under the temperatures lower than 300 degrees C. U-T curves, the value distance to the average U, dU/dT via mathematical differentiation and numerical analysis were employed to investigate to the catalytic reduction of SOCl2 systematically. The U-T curve of the battery containing the FePc/AC displays almost perfect rectangle profile. The average voltage of the battery contains the FePc/AC is 3.00 V, 0.21 V higher than that without the catalysts. After discharge, the surface of the carbon cathode containing FePc/AC displays a well-constructed loose morphology composed of LiCl nanoparticles around 100 nm in diameter. The inside of carbon cathode shows a dense morphology with a mount of nano holes around 50 nm, indicating that the formed LiCl permeates into the interior of the carbon cathode, attributing to that the FePc/AC nanocomposite catalysts facilitate the reduction of SOCl2, leading the formation loose LiCl film in nano scale for electrolyte SOCl2 and the formed LiCl diffusion.
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