Interlayer gap widened $$α$$-phase molybdenum trioxide as high-rate anodes for dual-ion-intercalation energy storage devices
Journal Article
·
· Nature Communications
- Technische Univ. Dresden (Germany)
- Univ. de Toulouse (France)
- Sun Yat-sen Univ., Guangzhou (China)
- Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
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-intercalation energy storage device is further assembled by combining the modified α-MoO3 anode with an anion-intercalation graphite cathode, operating well over a wide discharge rate range. Our study sheds light on a promising design strategy of layered materials for high-kinetics charge storage.
- Research Organization:
- Ames Laboratory (AMES), Ames, IA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
- Sponsoring Organization:
- Agence Nationale de la Recherché (ANR); Alexander von Humboldt Foundation; China Scholarship Council (CSC); Deutsche Forschungsgemeinschaft (DFG); European Research Council (ERC); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
- Grant/Contract Number:
- AC02-07CH11358
- OSTI ID:
- 1606537
- Report Number(s):
- IS--J-10182
- Journal Information:
- Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 11; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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