Issue 11, 2021

3D periodic polyimide nano-networks for ultrahigh-rate and sustainable energy storage

Abstract

Organic molecules with redox-active motifs have attracted great attention as next-generation electrodes for sustainable energy storage. While there has been significant progress in designing redox-active molecules, the practical requirements of high electrochemical activity and stability, as well as rapid kinetics for fast charging, are motivating a search for methods to engineer three-dimensional (3D) structures of organic-based electrodes. Here, we demonstrate a lithographic fabrication strategy for realizing a 3D bicontinuous nano-network consisting of a periodically porous nickel-supported redox-active polyimide layer (pore radius <300 nm), which provides highly conductive pathways for electron and ion transport. Through super-lithiation of nearly all unsaturated C[double bond, length as m-dash]C bonds in this 3D-structured anode, a high reversible capacity of 1260 mA h gāˆ’1 and 82.8% capacity retention over 250 cycles at a 10C rate are realized. Rates of up to 400C for lithium-ion storage of organic anodes have been achieved for the first time, opening up new engineering opportunities for high-performance organic batteries.

Graphical abstract: 3D periodic polyimide nano-networks for ultrahigh-rate and sustainable energy storage

Supplementary files

Article information

Article type
Paper
Submitted
07 Jun 2021
Accepted
06 Aug 2021
First published
06 Aug 2021

Energy Environ. Sci., 2021,14, 5894-5902

Author version available

3D periodic polyimide nano-networks for ultrahigh-rate and sustainable energy storage

Y. Ham, N. J. Fritz, G. Hyun, Y. B. Lee, J. S. Nam, I. Kim, P. V. Braun and S. Jeon, Energy Environ. Sci., 2021, 14, 5894 DOI: 10.1039/D1EE01739J

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