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Scalable, Binderless, and Carbonless Hierarchical Ni Nanodendrite Foam Decorated with Hydrous Ruthenium Dioxide for 1.6 V Symmetric Supercapacitors
Author(s) -
Liu Chueh,
Li Changling,
Ahmed Kazi,
Wang Wei,
Lee Ilkeun,
Zaera Francisco,
Ozkan Cengiz S.,
Ozkan Mihrimah
Publication year - 2016
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201500503
Subject(s) - supercapacitor , materials science , capacitance , chemical engineering , power density , current density , nanostructure , environmentally friendly , nanotechnology , nanoparticle , resistive touchscreen , composite material , electrode , power (physics) , ecology , chemistry , physics , electrical engineering , quantum mechanics , engineering , biology
Herein, Ni nanodendrite (ND) with diameter ≈30–100 nm directly synthesized on Ni foam is utilized as an effective support for hydrous RuO 2 in symmetric supercapacitors operated at 1.6 V. Highest specific capacitance 678.57 F g −1 can be achieved with energy density 60.32 Wh kg −1 . Even at large current density 100 A g −1 , high energy density 19.73 Wh kg −1 can still be maintained with power density 40 kW kg −1 owing to the pristine metal nanostructure without any carbon additive and resistive binder. Long lifespan is shown with marginal performance improvement (≈4%) over 10 000 cycles. More importantly, the template‐less and self‐assembled Ni ND synthesis requires only low temperature and eco‐friendly chemicals, and can be simply dip‐coated with RuO 2 nanoparticles. All of these render the RuO 2 ‐Ni ND foam readily adapted into mass manufacturing without efforts.