Issue 37, 2020

An electrolyte-phobic carbon nanotube current collector for high-voltage foldable lithium-ion batteries

Abstract

Flexible lithium-ion batteries have attracted extensive attention in electronics. However, their practical applications are primarily limited by low open-circuit voltage and energy density. Herein, we report a novel surface/interface modification strategy to obtain an electrolyte-phobic carbon nanotube film as the flexible current collector for foldable lithium-ion batteries. The as-assembled battery exhibits a high open-circuit voltage of 4.04 V and energy density of ∼293 W h kg−1 with excellent flexibility and stable cycle performance. The outstanding performance is ascribed to the electrolyte-phobic surface/interfacial layer of the carbon nanotube film, which restrains the intercalation of lithium ions into the carbon-based current collector. This work not only demonstrates a practical solution to appreciably revamp the voltage and energy density of flexible lithium-ion batteries, but more importantly, offers valuable insights for modifying the surface/interface chemistry of carbon-based current collectors for high-performance energy storage devices.

Graphical abstract: An electrolyte-phobic carbon nanotube current collector for high-voltage foldable lithium-ion batteries

Supplementary files

Article information

Article type
Paper
Submitted
14 Jul 2020
Accepted
25 Aug 2020
First published
26 Aug 2020

J. Mater. Chem. A, 2020,8, 19444-19453

An electrolyte-phobic carbon nanotube current collector for high-voltage foldable lithium-ion batteries

K. W. Mu, K. X. Liu, Z. Y. Wang, S. Zanman, Y. H. Yin, X. B. Liu, Y. S. Li, B. Y. Xia and Z. P. Wu, J. Mater. Chem. A, 2020, 8, 19444 DOI: 10.1039/D0TA06853E

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