Journal ArticleDOI
Hierarchical nanosheet-based CoMoO4–NiMoO4 nanotubes for applications in asymmetric supercapacitors and the oxygen evolution reaction
Reads0
Chats0
TLDR
In this article, the authors reported the designed synthesis of hierarchical nanosheet-based CoMoO4-NiMoOO4 nanotubes by a hydrothermal treatment and a subsequent calcination method.Abstract:
Hollow structures with hierarchical architecture and multi-composition have attracted extensive interest because of their fascinating physicochemical properties as well as wide applications. Herein we report the designed synthesis of hierarchical nanosheet-based CoMoO4–NiMoO4 nanotubes by a hydrothermal treatment and a subsequent calcination method. The walls of the hierarchical nanotubes are composed of interconnected NiMoO4 nanosheets and CoMoO4 nanoparticles anchored on the surface of the nanosheets. The diameter of the hollow interior, the thickness of NiMoO4 nanosheets and the diameter of CoMoO4 nanoparticles are around 180 nm, less than 6 nm and 3 nm, respectively, providing the hierarchical nanotubes with a high surface area and a large pore volume. When evaluated as electrodes for pseudocapacitors, the hierarchical nanotubes with an appropriate amount of CoMoO4 show a high specific capacitance of 1079 F g−1 at a current density of 5 A g−1 and excellent stability with 98.4% capacitance retention after 1000 cycles. Furthermore, an asymmetric capacitor, consisting of active carbon and hierarchical nanosheet-based CoMoO4–NiMoO4 nanotubes as negative and positive electrodes, respectively, delivers an energy density of 33 W h kg−1 at a power density of 375 W kg−1, and 16.3 W h kg−1 even at a high power density of 6000 W kg−1. The supercapacitive properties are much higher than those of single-phase NiMoO4 nanotubes, and most of the other metal molybdates and metal oxides reported previously. Besides, the hierarchical nanotubes also exhibit much better electrocatalytic activity for the oxygen evolution reaction than single-phase NiMoO4 nanotubes, and most of the other metal molybdates and metal oxides. Our results demonstrate the importance of rational design of complex hollow structures with enhanced properties for a wide range of practical applications.read more
Citations
More filters
Journal ArticleDOI
Molybdenum Oxides – From Fundamentals to Functionality
Isabela Alves de Castro,Robi S. Datta,Jian Zhen Ou,Andres Castellanos-Gomez,Sharath Sriram,Torben Daeneke,Kourosh Kalantar-zadeh +6 more
TL;DR: The properties and applications of molybdenum oxides are reviewed in depth, while an insightful outlook into future prospective applications for moly bdenum oxide is presented.
Journal ArticleDOI
Recent progress on earth abundant electrocatalysts for oxygen evolution reaction (OER) in alkaline medium to achieve efficient water splitting - A review
M. Jamesh,Xiaoming Sun +1 more
TL;DR: In this article, the authors reviewed the activity, stability and durability for oxygen evolution reaction in alkaline medium of different types of recently reported electrocatalysts such as Ni, Co, NiCo, Fe, Se, Mo, Cu, Mn, Zn, V, Ti/Ta, and metal free based earth-abundant-electrocatalyst.
Journal ArticleDOI
Advanced materials and technologies for supercapacitors used in energy conversion and storage: a review
M. I. A. Abdel Maksoud,Ramy Amer Fahim,Ahmed Esmail Shalan,Ahmed Esmail Shalan,M. Abd Elkodous,M. Abd Elkodous,S. O. Olojede,Ahmed I. Osman,Charlie Farrell,Charlie Farrell,Ala’a H. Al-Muhtaseb,A. S. Awed,A. H. Ashour,David W. Rooney +13 more
TL;DR: In this article, the authors compared the performance of spinel ferrites, perovskite oxides, transition metals sulfides, carbon materials, and conducting polymers for supercapacitors.
Journal ArticleDOI
Organic-inorganic hybrids-directed ternary NiFeMoS anemone-like nanorods with scaly surface supported on nickel foam for efficient overall water splitting
Kai-Li Yan,Jun-Feng Qin,Zi-Zhang Liu,Bin Dong,Jing-Qi Chi,Wen-Kun Gao,Jia-Hui Lin,Yong-Ming Chai,Chen-Guang Liu +8 more
TL;DR: In this article, the ternary NiFeMoS anemones-like nanorods with scaly surface supported on nickel foam have been synthesized through a two-step method, where the NiFe hydroxides film has been electrodeposited on the surface of NF, leading to a homogeneous doping of NiFe.
Journal ArticleDOI
Decoration NiCo2S4 nanoflakes onto Ppy nanotubes as core-shell heterostructure material for high-performance asymmetric supercapacitor
TL;DR: In this paper, a unique Ppy@NiCo 2 S 4 core-shell heterostructure material is prepared taking polypyrrole (Ppy) nanotubes as skeleton through a simple and environmentally friendly hydrothermal method.
References
More filters
Journal ArticleDOI
Nanostructured materials for advanced energy conversion and storage devices
Antonino S. Aricò,Peter G. Bruce,Bruno Scrosati,Jean-Marie Tarascon,Jean-Marie Tarascon,Walter van Schalkwijk +5 more
TL;DR: This review describes some recent developments in the discovery of nanoelectrolytes and nanoeLECTrodes for lithium batteries, fuel cells and supercapacitors and the advantages and disadvantages of the nanoscale in materials design for such devices.
Journal ArticleDOI
A review of electrode materials for electrochemical supercapacitors
TL;DR: Two important future research directions are indicated and summarized, based on results published in the literature: the development of composite and nanostructured ES materials to overcome the major challenge posed by the low energy density.
Journal ArticleDOI
A perovskite oxide optimized for oxygen evolution catalysis from molecular orbital principles.
TL;DR: The high activity of BSCF was predicted from a design principle established by systematic examination of more than 10 transition metal oxides, which showed that the intrinsic OER activity exhibits a volcano-shaped dependence on the occupancy of the 3d electron with an eg symmetry of surface transition metal cations in an oxide.
Journal ArticleDOI
Conducting-polymer-based supercapacitor devices and electrodes
TL;DR: In-situ high-resolution transmission electron microscopy (HRTEM) studies of the structural transformations that occur during the synthesis of carbon-coated LiFePO4 and heat treatment to elevated temperatures were conducted in two different electron microscopes as discussed by the authors.
Journal ArticleDOI
Solar Energy Supply and Storage for the Legacy and Nonlegacy Worlds
Timothy R. Cook,Dilek K. Dogutan,Steven Y. Reece,Yogesh Surendranath,Thomas S. Teets,Daniel G. Nocera +5 more
TL;DR: The Scope of Review: Large-Scale Centralized Energy Storage, Chemical Energy Storage: Solar Fuels, and Capacitors 6486 5.1.2.