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Potential‐Induced Electronic Structure Changes in Supercapacitor Electrodes Observed by In Operando Soft X‐Ray Spectroscopy
Author(s) -
BaggeHansen Michael,
Wood Brandon C.,
Ogitsu Tadashi,
Willey Trevor M.,
Tran Ich C.,
Wittstock Arne,
Biener Monika M.,
Merrill Matthew D.,
Worsley Marcus A.,
Otani Minoru,
Chuang ChengHao,
Prendergast David,
Guo Jinghua,
Baumann Theodore F.,
van Buuren Tony,
Biener Jürgen,
Lee Jonathan R. I.
Publication year - 2015
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201403680
Subject(s) - supercapacitor , materials science , electrode , graphene , spectroscopy , nanotechnology , aerogel , optoelectronics , capacitance , physics , chemistry , quantum mechanics
The dynamic physiochemical response of a functioning graphene‐based aerogel supercapacitor is monitored in operando by soft X‐ray spectroscopy and interpreted through ab initio atomistic simulations. Unanticipated changes in the electronic structure of the electrode as a function of applied voltage bias indicate structural modifications across multiple length scales via independent pseudocapacitive and electric double layer charge storage channels.