MXene-Derived Potassium-Preintercalated Bilayered Vanadium Oxide Nanostructures for Cathodes in Nonaqueous K-Ion Batteries DOI Creative Commons
Timofey Averianov, Xinle Zhang, Ryan Andris

et al.

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 7, 2025

Bilayered vanadium oxides (BVOs) are promising cathode materials for beyond-Li-ion batteries due to their tunable chemistries and high theoretical capacities. However, the large size of beyond-Li+ ions limits electrochemical cycling rate capability BVO electrodes. Recent reports MXene-derived BVOs with nanoscale flower-like morphology have shown improved stability at rates up 5C in nonaqueous lithium-ion batteries. Here, we report how morphological stabilization can lead potassium-ion (PIBs) through synthesis characterization K-preintercalated (MD-KVOs), which were derived from two V2CT x precursor prepared using different etching protocols. We show that conditions affect surface chemistry MXene, plays a role MXene-to-oxide transformation process. MXene milder etchant transformed into nanoflower MD-KVO two-dimensional (2D) nanosheet petals (KVO-DMAE) while more aggressive produced one-dimensional (1D) nanorod (KVO-CMAE). Electrochemical MD-KVOs after drying 200 °C under vacuum (KVO-DMAE-200 KVO-CMAE-200) PIBs showed 2D particles combined control interlayer water K+ ion content. Structure refinement KVO-DMAE-200 further corroborates behavior observed during cycling, connecting structural compositional characteristics capability. This work demonstrates proper synthetic methodology cause downstream effects structure, chemical composition, nanostructured layered oxide materials, is necessary development future battery technologies.

Language: Английский

MXene-Derived Potassium-Preintercalated Bilayered Vanadium Oxide Nanostructures for Cathodes in Nonaqueous K-Ion Batteries DOI Creative Commons
Timofey Averianov, Xinle Zhang, Ryan Andris

et al.

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 7, 2025

Bilayered vanadium oxides (BVOs) are promising cathode materials for beyond-Li-ion batteries due to their tunable chemistries and high theoretical capacities. However, the large size of beyond-Li+ ions limits electrochemical cycling rate capability BVO electrodes. Recent reports MXene-derived BVOs with nanoscale flower-like morphology have shown improved stability at rates up 5C in nonaqueous lithium-ion batteries. Here, we report how morphological stabilization can lead potassium-ion (PIBs) through synthesis characterization K-preintercalated (MD-KVOs), which were derived from two V2CT x precursor prepared using different etching protocols. We show that conditions affect surface chemistry MXene, plays a role MXene-to-oxide transformation process. MXene milder etchant transformed into nanoflower MD-KVO two-dimensional (2D) nanosheet petals (KVO-DMAE) while more aggressive produced one-dimensional (1D) nanorod (KVO-CMAE). Electrochemical MD-KVOs after drying 200 °C under vacuum (KVO-DMAE-200 KVO-CMAE-200) PIBs showed 2D particles combined control interlayer water K+ ion content. Structure refinement KVO-DMAE-200 further corroborates behavior observed during cycling, connecting structural compositional characteristics capability. This work demonstrates proper synthetic methodology cause downstream effects structure, chemical composition, nanostructured layered oxide materials, is necessary development future battery technologies.

Language: Английский

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