Issue 28, 2020

“Fiber-in-tube” hierarchical nanofibers based on defect-rich bimetallic oxide@C bubbles: a high-efficiency and superior performance cathode for hybrid Zn batteries

Abstract

The exploration of novel cathodes with high efficiency and superior energy storage is a crucial issue for hybrid Zn batteries (HZBs). Herein, novel fiber-in-tube hierarchical nanofibers composed of defect-rich NiCo2O4−δ@C bubbles (DBHF) are constructed as the HZB cathode. The nanoscale bimetal oxide bubbles with a defective structure are surrounded by a porous carbon network, which connect with each other and assemble a fiber-in-tube hierarchical configuration. The DBHF nanofiber not only provides a highly porous and conductive skeleton for fast electron/ion transport, but also possesses rich active sites to accelerate oxygen reduction/evolution reactions (ORR/OER). Benefitting from both electrochemical and electrocatalytic properties, the fabricated HZB with the DBHF cathode exhibits a high operating voltage, fast kinetics and high energy density. In addition, the two-set charge/discharge curves during long-term cycles further demonstrate its good stability and high efficiency. More impressively, the wide environmental adaptation and excellent “air-charging” capability make the prepared flexible hybrid Zn battery an uninterrupted power source for flexible electronics under different working conditions. Therefore, this work provides a novel high-performance cathode for HZBs and propels the development of flexible batteries towards multiple applications.

Graphical abstract: “Fiber-in-tube” hierarchical nanofibers based on defect-rich bimetallic oxide@C bubbles: a high-efficiency and superior performance cathode for hybrid Zn batteries

Supplementary files

Article information

Article type
Paper
Submitted
10 Jun 2020
Accepted
01 Jul 2020
First published
01 Jul 2020

J. Mater. Chem. A, 2020,8, 13996-14005

“Fiber-in-tube” hierarchical nanofibers based on defect-rich bimetallic oxide@C bubbles: a high-efficiency and superior performance cathode for hybrid Zn batteries

Y. Zhou, Y. Song, S. Zhang and C. Deng, J. Mater. Chem. A, 2020, 8, 13996 DOI: 10.1039/D0TA05774F

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