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

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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 neatly all unsaturated C=C bonds in this 3D-structured anode, a high reversible capacity of 1260 mA h g(-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.
Publisher
ROYAL SOC CHEMISTRY
Issue Date
2021-11
Language
English
Article Type
Article
Citation

ENERGY &amp; ENVIRONMENTAL SCIENCE, v.14, no.11, pp.5894 - 5902

ISSN
1754-5692
DOI
10.1039/d1ee01739j
URI
http://hdl.handle.net/10203/289261
Appears in Collection
MS-Journal Papers(저널논문)
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