Fig. 1: Schematic illustration showing the fabrication process of CNTs@TiN–TiO2 and its catalytic process for the polysulfide conversion. | Nature Communications

Fig. 1: Schematic illustration showing the fabrication process of CNTs@TiN–TiO2 and its catalytic process for the polysulfide conversion.

From: Long-life lithium-sulfur batteries with high areal capacity based on coaxial CNTs@TiN-TiO2 sponge

Fig. 1

Through the ALD method, TiN and TiO2 are deposited sequentially on the CNTs surface, and then the obtained hybrid is annealed to be transformed into the coaxial CNTs@TiN-TiO2 sponge with uniform distribution of the TiN–TiO2 heterostructure. With the help of the TiN–TiO2 heterostructure, the conversion process from lithium polysulfides to Li2S2/Li2S occurs smoothly in two steps of adsorption and catalytic conversion.

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