J. Mater. Sci. Technol. ›› 2022, Vol. 120: 159-166.DOI: 10.1016/j.jmst.2022.01.007

• Research Article • Previous Articles     Next Articles

Ultrahigh-energy and -power aqueous rechargeable zinc-ion microbatteries based on highly cation-compatible vanadium oxides

Sheng-Bo Wanga,1, Qing Rana,1, Wu-Bin Wana,1, Hang Shia, Shu-Pei Zenga, Zi Wena, Xing-You Langa,b,*(), Qing Jianga,*()   

  1. aKey Laboratory of Automobile Materials (Jilin University), Ministry of Education and School of Materials Science and Engineering, Jilin University, Changchun 130022, China
    bState Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China
  • Received:2021-11-21 Revised:2021-12-21 Accepted:2022-01-05 Published:2022-09-01 Online:2022-03-09
  • Contact: Xing-You Lang,Qing Jiang
  • About author:jiangq@jlu.edu.cn (Q. Jiang).
    * Key Laboratory of Automobile Materials (Jilin Univer- sity), Ministry of Education, and School of Materials Science and Engineering, Jilin University, Changchun 130022, China. E-mail addresses: xylang@jlu.edu.cn (X.-Y. Lang),
    First author contact:

    1 These authors contributed equally to this work.

Abstract:

Aqueous multivalent-metal-ion intercalation chemistries hold genuine promise to develop safe and powerful microbatteries for potential use in many miniaturized electronics. However, their development is beset by state-of-the-art electrode materials having practical capacities far below their theoretical values. Here we demonstrate that high compatibility between layered transition-metal oxide hosts and hydrated cation guests substantially boost their multi-electron-redox reactions to offer higher capacities and rate capability, based on typical bipolar vanadium oxides preintercalated with hydrated cations (MxV2O5). When seamlessly integrated on Au current microcollectors with a three-dimensional bicontinuous nanoporous architecture that offers high pathways of electron transfer and ion transport, the constituent ZnxV2O5 exhibits specific capacity of as high as ∼527 mAh g-1 at 5 mV s-1 and retains ∼300 mAh g-1 at 200 mV s-1 in 1 M ZnSO4 aqueous electrolyte, outperforming the MxV2O5 (M = Li, Na, K, Mg). This allows aqueous rechargeable zinc-ion microbatteries constructed with symmetric nanoporous ZnxV2O5/Au interdigital microelectrodes as anode and cathode to show high-density energy of ∼358 mWh cm-3 (a value that is forty-fold higher than that of 4 V/500 μAh Li thin film battery) at high levels of power delivery.

Key words: Multivalent metal ions, Aqueous rechargeable batteries, Microbatteries, Nanoporous metals, Metal/oxide composites