Interlayer gap widened α-phase molybdenum trioxide as high-rate anodes for dual-ion-intercalation energy storage devices.

ABSTRACT: Employing high-rate ion-intercalation electrodes represents a feasible way to mitigate the inherent trade-off between energy density and power density for electrochemical energy storage devices, but efficient approaches to boost the charge-storage kinetics of electrodes are still needed. Here, we demonstrate a water-incorporation strategy to expand the interlayer gap of α-MoO₃, in which water molecules take the place of lattice oxygen of α-MoO₃. Accordingly, the modified α-MoO₃ electrode exhibits theoretical-value-close specific capacity (963 C g^-1 at 0.1 mV s^-1), greatly improved rate capability (from 4.4% to 40.2% at 100 mV s^-1) and boosted cycling stability (from 21 to 71% over 600 cycles). A fast-kinetics dual-ion-interc

SUBMITTER: Yu M 

PROVIDER: S-EPMC7067814 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature