|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|
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||https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=23992|
|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