We are delighted to share the latest publication from our partner TU Dresden in the field of materials science and energy storage – “Mxenes with ordered triatomic-layer borate polyanion terminations”, featured in Nature Materials (IF = 41.2).
The research presented the synthesis of MXenes with triatomic-layer borate polyanion terminations through a flux-assisted eutectic molten etching approach. During the synthesis, Lewis acidic salts act as the etching agent to obtain the MXene backbone. At the same time, borax generates BO2⁻species, which cap the MXene surface with an O–B–O configuration. In contrast to conventional chlorine/oxygen-terminated Nb2C with localized charge transport, OBO-terminated Nb2C features band transport described by the Drude model, exhibiting a 15-fold increase in electrical conductivity and a 10-fold improvement in charge mobility at the d.c. limit. This transition is attributed to surface ordering that mitigates charge carrier backscattering and trapping. Additionally, OBO terminations provide Ti3C2 MXene with substantially enriched Li⁺-hosting sites and, thereby, a large charge-storage capacity of 420 mAh g⁻¹. These findings illustrate the potential of intricate termination configurations in MXenes and their applications for (opto)electronics and energy storage.
Congratulations to TUD on this outstanding achievement!
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