https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46425 2 hierarchical nanotubes with high pre-intercalated K cation content (a-K_0.19MnO₂) are proposed as a superior cathode for ZIBs. Specifically, the a-K_0.19MnO₂ nanotubes are prepared via a self-sacrificial template method, including a neutral solvent hydrothermal intercalation and a subsequent annealing phase transformation process. When tested as cathodes for ZIBs, a subsequent H⁺ and Zn²⁺intercalation mechanism at different voltage platforms is clarified. The water-solvated H⁺ first inserts into tunnel cavities and the subsequent insertion of Zn²⁺ into MnO₂ partially changes the MnO₂ phase from a tunnel-type structure to a layered-type structure (Zn-buserite). The high content pre-intercalated K cations in the layered-type matrix as pillars stabilize the layered structures and expand Zn²⁺ migration channels, which can facilitate the diffusion of Zn2⁺ in the MnO₂ cathodes. It is noteworthy that, a K-salt additive is employed to maintain the concentration of K⁺ in the electrolyte with the aim of inhibiting the extraction of K⁺ from the a-K_0.19MnO₂ host material during cycling, thereby further boosting the cycling ability.]]> Thu 12 Oct 2023 15:30:24 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:52063 2 hierarchical nanotubes with high pre-intercalated K cation content (a-K_0.19MnO₂) are proposed as a superior cathode for ZIBs. Specifically, the a-K_0.19MnO₂ nanotubes are prepared via a self-sacrificial template method, including a neutral solvent hydrothermal intercalation and a subsequent annealing phase transformation process. When tested as cathodes for ZIBs, a subsequent H⁺ and Zn²⁺intercalation mechanism at different voltage platforms is clarified. The water-solvated H⁺ first inserts into tunnel cavities and the subsequent insertion of Zn²⁺ into MnO₂ partially changes the MnO₂ phase from a tunnel-type structure to a layered-type structure (Zn-buserite). The high content pre-intercalated K cations in the layered-type matrix as pillars stabilize the layered structures and expand Zn²⁺ migration channels, which can facilitate the diffusion of Zn2⁺ in the MnO₂ cathodes. It is noteworthy that, a K-salt additive is employed to maintain the concentration of K⁺ in the electrolyte with the aim of inhibiting the extraction of K⁺ from the a-K_0.19MnO₂ host material during cycling, thereby further boosting the cycling ability.]]> Fri 13 Oct 2023 08:36:57 AEDT ]]>