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Molecular‐Scale Hybridization of Clay Monolayers and Conducting Polymer for Thin‐Film Supercapacitors
Author(s) -
Zhao Jingwen,
Xu Simin,
Tschulik Kristina,
Compton Richard G.,
Wei Min,
O'Hare Dermot,
Evans David G.,
Duan Xue
Publication year - 2015
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201500408
Subject(s) - materials science , supercapacitor , pedot:pss , monolayer , capacitance , graphene , anode , electrode , thin film , nanotechnology , energy storage , polymer , conductive polymer , optoelectronics , chemical engineering , composite material , layer (electronics) , power (physics) , chemistry , physics , quantum mechanics , engineering
Development of electrode materials with well‐defined architectures is a fruitful and profitable approach for achieving highly‐efficient energy storage systems. A molecular‐scale hybrid system is presented based on the self‐assembly of CoNi‐layered double hydroxide (CoNi‐LDH) monolayers and the conducting polymer (poly(3,4‐ethylene dioxythiophene):poly(styrene sulfonate), denoted as PEDOT:PSS) into an alternating‐layer superlattice. Owing to the homogeneous interface and intimate interaction, the resulting CoNi‐LDH/PEDOT:PSS hybrid materials possess a simultaneous enhancement in ion and charge‐carrier transport and exhibit improved capacitive properties with a high specific capacitance (960 F g –1 at 2 A g –1 ) and excellent rate capability (83.7% retention at 30 A g –1 ). In addition, an in‐plane supercapacitor device with an interdigital design is fabricated based on a CoNi‐LDH/PEDOT:PSS thin film, delivering a significantly enhanced energy and power output (an energy density of 46.1 Wh kg –1 at 11.9 kW kg –1 ). Its application in miniaturized devices is further demonstrated by successfully driving a photodetector. These characteristics demonstrate that the molecular‐scale assembly of LDH monolayers and the conducting polymer is promising for energy storage and conversion applications in miniaturized electronics.