Proceedings of MATSUS23 & Sustainable Technology Forum València (STECH23) (MATSUS23)
Publication date: 22nd December 2022
Design of alkaline-ion batteries strongly depends on the properties of the carbon anode. Chemical activation with different activating agents is widely used process for tailoring structural/textural/electrochemical properties of carbon to make it suitable for high rate Li-ion batteries. However, when it comes to Na-ion batteries different behavior is observed [1]. In this study, the influence of ZnCl2 activation on Na-ion intercalation behavior of vine shoots-derived carbon at different temperatures was examined in an organic electrolyte. It was revealed that with the increase of the carbonization temperature the activation treatment attenuates Na storage behavior, while Na-intercalation becomes favored for non-activated samples, as evidenced by the longer plateau near the potential of metallic Na. This can be attributed to the shrinkage of the interlayer distance upon activation, more pronounced at higher temperatures, which blocks Na-ions to intercalate deeper into graphitic domains. Observed changes will be correlated with the textural properties of carbon materials and their capability to convey charge for SEI layer formation. These results will provide more insight into the activation process of biomass-derived carbon in terms of Na-ion adsorption/intercalation.
This work is sustained by NATO Science for Peace and Security (SPS) Programme (project G5836-SUPERCAR).
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