Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1039/d0ta07267b
Document accepted manuscript
Title (Primary) Flexible and additive-free organic electrodes for aqueous sodium ion batteries
Author Yang, L.; Wang, P.; Zhang, S.; Wang, Y.; Zang, L.; Zhu, H.; Yin, J.; Yang, H.Y.
Journal Journal of Materials Chemistry A
Year 2020
Department OEC
Volume 8
Issue 43
Page From 22791
Page To 22801
Language englisch
Abstract Organic materials with redox activities are promising candidates for aqueous flexible sodium ion storage devices (AFSISDs) due to their mechanical flexibility and low dissolution in aqueous electrolytes. However, the advantages of organic electrodes are not fully exploited due to uncontrollable morphologies with sluggish electrochemical kinetics, and lack of deep understanding about the storage mechanism via in situ technologies. Herein, an interfacial self-assembly strategy is proposed to directly construct PTCDI nanofibers onto flexible ITO substrates by a binder-free approach. Combining in situ Raman spectroscopy and DFT calculations, the Na+ storage mechanism based on an enolization reaction (–CO ↔ –C–O–Na) of two carbonyl groups located in the para position of PTCDI is illuminated. Coupled with an activated carbon cathode, the organic AFSISD delivers an ultrahigh energy density of 83.8 W h kg−1 and a largely improved power density of 3.4 kW kg−1. The as-prepared organic nanofibers show a superior volumetric energy and high power density (i.e., 7.1 mW h cm−3 and 289.7 mW cm−3). This work opens up new horizons for a wide variety of flexible electronics based on organic electrode materials in aqueous neutral electrolytes.


Persistent UFZ Identifier
Yang, L., Wang, P., Zhang, S., Wang, Y., Zang, L., Zhu, H., Yin, J., Yang, H.Y. (2020):
Flexible and additive-free organic electrodes for aqueous sodium ion batteries
J. Mater. Chem. A 8 (43), 22791 - 22801