Molecular Design of Mesoporous NiCo<inf>2</inf>O<inf>4</inf>and NiCo<inf>2</inf>S<inf>4</inf>with Sub-Micrometer-Polyhedron Architectures for Efficient Pseudocapacitive Energy Storage
MetadataShow full item record
© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Spinel-type NiCo 2 O 4 (NCO) and NiCo 2 S 4 (NCS) polyhedron architectures with sizes of 500–600 nm and rich mesopores with diameters of 1–2 nm are prepared facilely by the molecular design of Ni and Co into polyhedron-shaped zeolitic imidazolate frameworks as solid precursors. Both as-prepared NCO and NCS nanostructures exhibit excellent pseudocapacitance and stability as electrodes in supercapacitors. In particular, the exchange of O 2- in the lattice of NCO with S 2- obviously improves the electrochemical performance. NCS shows a highly attractive capacitance of 1296 F g -1 at a current density of 1 A g -1 , ultrahigh rate capability with 93.2% capacitance retention at 10 A g -1 , and excellent cycling stability with a capacitance retention of 94.5% after cycling at 1 A g -1 for 6000 times. The asymmetric supercapacitor with an NCS negative electrode and an active carbon positive electrode delivers a very attractive energy density of 44.8 Wh kg -1 at power density 794.5 W kg -1 , and a favorable energy density of 37.7 Wh kg -1 is still achieved at a high power density of 7981.1 W kg -1 . The specific mesoporous polyhedron architecture contributes significantly to the outstanding electrochemical performances of both NCO and NCS for capacitive energy storage.
Showing items related by title, author, creator and subject.
B-Site Cation-Ordered Double-Perovskite Oxide as an Outstanding Electrode Material for Supercapacitive Energy Storage Based on the Anion Intercalation MechanismXu, Z.; Liu, Yu; Zhou, W.; Tade, Moses; Shao, Zongping (2018)Â© 2018 American Chemical Society. Perovskite oxides are highly promising electrodes for oxygen-ion-intercalation-type supercapacitors owing to their high oxygen vacancy concentration, oxygen diffusion rate, and tap ...
Highly Defective Layered Double Perovskite Oxide for Efficient Energy Storage via Reversible Pseudocapacitive Oxygen-Anion IntercalationLiu, Y.; Wang, Z.; Veder, Jean-Pierre; Xu, Z.; Zhong, Y.; Zhou, W.; Tade, Moses; Wang, Shaobin; Shao, Zongping (2018)The use of perovskite materials as anion-based intercalation pseudocapacitor electrodes has received significant attention in recent years. Notably, these materials, characterized by high oxygen vacancy concentrations, ...
In-situ polymerization of magnetic biochar – polypyrrole composite: A novel application in supercapacitorThines, K.; Abdullah, E.; Mujawar, Mubarak; Ruthiraan, M. (2017)© 2017 Elsevier LtdThis paper focuses on the production of magnetic biochar through a novel vacuum condition in an electrical muffle furnace by employing durian rind as the raw material in the presence of three different ...