Achieving Ultrahigh Energy Density and Long Durability in a Flexible Rechargeable Quasi-Solid-State Zn-MnO<sub>2</sub> Battery.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 28452147.
- Also identified by DOI 10.1002/adma.201700274.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
Advanced flexible batteries with high energy density and long cycle life are an important research target. Herein, the first paradigm of a high-performance and stable flexible rechargeable quasi-solid-state Zn-MnO<sub>2</sub> battery is constructed by engineering MnO<sub>2</sub> electrodes and gel electrolyte. Benefiting from a poly(3,4-ethylenedioxythiophene) (PEDOT) buffer layer and a Mn<sup>2+</sup> -based neutral electrolyte, the fabricated Zn-MnO<sub>2</sub> @PEDOT battery presents a remarkable capacity of 366.6 mA h g<sup>-1</sup> and good cycling performance (83.7% after 300 cycles) in aqueous electrolyte. More importantly, when using PVA/ZnCl<sub>2</sub> /MnSO<sub>4</sub> gel as electrolyte, the as-fabricated quasi-solid-state Zn-MnO<sub>2</sub> @PEDOT battery remains highly rechargeable, maintaining more than 77.7% of its initial capacity and nearly 100% Coulombic efficiency after 300 cycles. Moreover, this flexible quasi-solid-state Zn-MnO<sub>2</sub> battery achieves an admirable energy density of 504.9 W h kg<sup>-1</sup> (33.95 mW h cm<sup>-3</sup> ), together with a peak power density of 8.6 kW kg<sup>-1</sup> , substantially higher than most recently reported flexible energy-storage devices. With the merits of impressive energy density and durability, this highly flexible rechargeable Zn-MnO<sub>2</sub> battery opens new opportunities for powering portable and wearable electronics.