Authors: Henning Kaland
Title: MXene-Sulfur Composite Cathode for Magnesium-Sulfur Batteries
Affiliation: Norwegian University of Science and Technology
Mg-S batteries represent a promising approach, combining cheap, safe and abundant elements with a high theoretical energy density. The present main issue is that the soluble intermediate discharge products, Mg polysulfides, diffuse and/or migrate to the Mg anode and passivates it . A common strategy to impede the polysulfide shuttling in Li-S batteries, is to mix the sulfur with a matrix material with high polysulfide affinity, where MXenes have demonstrated promising results . In this work, Ti3C2Tx MXene has been investigated as sulfur matrix material for Mg-S batteries. Although the fabricated MXene-sulfur composite cathodes showed improved electrochemical performance compared to a carbon-based composite, the MXene-sulfur composite was still found to suffer from severe polysulfide shuttling, as evidenced by post mortem analysis.
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