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The synergistic effect of Lewis acidic etching V4C3(MXene)@CuSe2/CoSe2 as an advanced cathode material for aluminum batteries by Yi Wang; Hanqing Gu; Yong Lu; Wenming Zhang; Zhanyu Li is a Engineering article available to read on EtoBox.

What is The synergistic effect of Lewis acidic etching V4C3(MXene)@CuSe2/CoSe2 as an advanced cathode material for aluminum batteries about?

Herein, we focused on the development of the V 4 C 3 MXene composite bimetallic selenide heterostructure (V 4 C 3 @CuSe 2 /CoSe 2 ) as a cathode material for aluminum batteries. This heterostructure was prepared through a Lewis melt salt etching and selenization process. By capitalizing on the synergistic effect between the bimetallic selenide and V 4 C 3 MXene, V 4 C 3 @CuSe 2 /CoSe 2 exhibited rapid charge transfer and demonstrated superior discharge specific capacity compared to V 4 C 3 composite monometallic selenide. Furthermore, the incorporation of V 4 C 3 improved the material's stability during charging/discharging. The initial discharge specific capacity of V 4 C 3 @CuSe 2 /CoSe 2 reached an impressive 809 mAh g -1 at 1 A g -1 . Even after nearly 30 0 0 cycles, it retained a substantial capacity of 169.1 mAh g -1 . Ex-situ XPS analysis confirmed the reversible valence transitions of Cu, Co, and Se elements as the main energy storage reactions taking place in the cathode material. Density functional theory analysis provided further insights, revealing that the strong metallic behavior of the heterostructure stemmed from the charge rearrangement facilitated by the bimetalli

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Author

Yi Wang; Hanqing Gu; Yong Lu; Wenming Zhang; Zhanyu Li

Publisher

Elsevier BV

Published

2024

Language

EN

Field

Engineering (Physical Sciences)