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Macroporous, Freestanding Birnessite H~0.08~MnO~2~·0.7H~2~O Nanobelts/Carbon Nanotube Membranes for Wearable Zinc-Ion Batteries with Superior Rate Capability and Cyclability by Yanan Wang; Fei Ye; Zeyi Wu; Le Jiang; Lin Zhang; Linfeng Hu is a Engineering article available to read on EtoBox.

What is Macroporous, Freestanding Birnessite H~0.08~MnO~2~·0.7H~2~O Nanobelts/Carbon Nanotube Membranes for Wearable Zinc-Ion Batteries with Superior Rate Capability and Cyclability about?

Rechargeable aqueous zinc-ion batteries (ZIBs) are regarded as an ideal choice for next-generation energy-storage devices. Nevertheless, the ZIB performance is still far from satisfactory due to the lack of suitable cathode materials. In this work, we demonstrated excellent zinc-ion-storage behavior in proton-type birnessite H 0.08 MnO 2 •0.7H 2 O nanobelts for the first time using a welldesigned H 0.08 MnO 2 •0.7H 2 O/MWCNT composite membrane. Interestingly, our H 0.08 MnO 2 •0.7H 2 O nanobelts with a very high aspect ratio (∼30) facilitate the formation of abundant macropores of 0.5-5.0 μm size inside the as-constructed membrane, which provides an effective pathway for liquid electrolyte penetration during the long-term charge/discharge cycling. The resultant H 0.08 MnO 2 •0.7H 2 O/ MWCNT composite membrane delivers a high Zn 2+ diffusion coefficient of ∼8.18 × 10 -14 cm 2 s -1 , excellent rate capability, and long-term cyclability over 1000 cycles at 3.0 A g -1 . Our study not only reveals H 0.08 MnO 2 •0.7H 2 O as a robust cathode material for aqueous zinc-ion batteries but also demonstrates a macropore-assisted binder-free strategy to realize next-generation energy-storage dev

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Author

Yanan Wang; Fei Ye; Zeyi Wu; Le Jiang; Lin Zhang; Linfeng Hu

Publisher

American Chemical Society (ACS)

Published

2021

Language

EN

Field

Engineering (Physical Sciences)