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Issue 2, 2021
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A flexible, integrated film battery configuration for ultrafast sodium ion storage

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Abstract

Flexible sodium-ion battery (SIB) design is hampered by the incompatible component integration at the device level, especially in consideration of the sluggish Na+ diffusion kinetics, complex assembly technology and the electrode pulverization upon mechanical loadings. Herein, we develop a scalable spin-coating approach, through casting the cathode and anode slurries onto the both sides of an AlOx modified polyethylene (AlOx-MPE) separator, to construct a layer-stacked thin film battery configuration. The composite anode involves hierarchical structure design by vertically anchoring metallic phase (1T) MoS2 nanosheets on an interconnected nitrogen-doped carbon framework (namely 1T-MoS2/NCF). For the cathode part, NASICON-type NaVPO4F was directly integrated with the AlOx-MPE separator as the current-collector-free electrode. Upon the precise tuning of the areal capacity ratio of negative to positive electrodes (N/P ratio), the film battery prototype delivers a robust cyclability in the different deformation states as well as a maximized power output of ∼1049 W kg−1. This integrated, thin-film battery configuration demonstrates tremendous potential in future flexible electronics.

Graphical abstract: A flexible, integrated film battery configuration for ultrafast sodium ion storage

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Article information


Submitted
20 Oct 2020
Accepted
19 Nov 2020
First published
23 Dec 2020

J. Mater. Chem. A, 2021,9, 1252-1259
Article type
Paper

A flexible, integrated film battery configuration for ultrafast sodium ion storage

W. Zhao, H. Wang, S. Li, X. Tang, M. Zhang, A. Mustehsin, M. Bai, S. Liu, C. Sun and Y. Ma, J. Mater. Chem. A, 2021, 9, 1252
DOI: 10.1039/D0TA10238E

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