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

Yu, Minghao and Shao, Hui and Wang, Gang and Yang, Fan and Liang, Chaolun and Rozier, Patrick and Wang, Cai-Zhuang and Lu, Xihong and Simon, Patrice and Feng, Xinliang Interlayer gap widened α-phase molybdenum trioxide as high-rate anodes for dual-ion-intercalation energy storage devices. (2020) Nature Communications, 11 (1). ISSN 2041-1723

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Official URL: https://doi.org/10.1038/s41467-020-15216-w

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 0.1mV s−1), greatly improved rate capability (from 4.4% to 40.2% at 100 mVs−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.

Item Type:Article
HAL Id:hal-03103790
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Iowa State University - ISU (USA)
Other partners > Sun Yat-sen University (CHINA)
Other partners > Technische Universität Dresden - TUD (GERMANY)
Laboratory name:
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Deposited On:08 Jan 2021 12:28

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