Layered silicate magadiite–derived three-dimensional honeycomb-like cobalt–nickel silicates as excellent cathode for hybrid supercapacitors

2021 ◽  
Vol 22 ◽  
pp. 100550
Author(s):  
X. Jing ◽  
Y. Zhang ◽  
X. Dong ◽  
Y. Mu ◽  
X. Liu ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Layered Silicate ◽  
Hybrid Supercapacitors ◽  
Cobalt Nickel

Cobalt-nickel silicate hydroxide on amorphous carbon derived from bamboo leaves for hybrid supercapacitors

2019 ◽  
Vol 375 ◽  
pp. 121938 ◽  
Author(s):  
Yifu Zhang ◽  
Chen Wang ◽  
Hanmei Jiang ◽  
Qiushi Wang ◽  
Jiqi Zheng ◽  
...  
Keyword(s):  
Amorphous Carbon ◽  
Hybrid Supercapacitors ◽  
Cobalt Nickel ◽  
Nickel Silicate ◽  
Bamboo Leaves

Structure determination of a partially ordered layered silicate material with an NMR crystallography approach

2017 ◽  
Vol 73 (3) ◽  
pp. 184-190 ◽  
Author(s):  
Darren Henry Brouwer ◽  
Sylvian Cadars ◽  
Kathryn Hotke ◽  
Jared Van Huizen ◽  
Nicholas Van Huizen
Keyword(s):  
Nmr Spectroscopy ◽  
Structure Determination ◽  
Three Dimensional ◽  
Layered Silicate ◽  
Silicate Layer ◽  
Silicate Material ◽  
X Ray Diffraction ◽  
X Ray ◽  
Nmr Crystallography

Structure determination of layered materials can present challenges for conventional diffraction methods due to the fact that such materials often lack full three-dimensional periodicity since adjacent layers may not stack in an orderly and regular fashion. In such cases, NMR crystallography strategies involving a combination of solid-state NMR spectroscopy, powder X-ray diffraction, and computational chemistry methods can often reveal structural details that cannot be acquired from diffraction alone. We present here the structure determination of a surfactant-templated layered silicate material that lacks full three-dimensional crystallinity using such an NMR crystallography approach. Through a combination of powder X-ray diffraction and advanced 29Si solid-state NMR spectroscopy, it is revealed that the structure of the silicate layer of this layered silicate material templated with cetyltrimethylammonium surfactant cations is isostructural with the silicate layer of a previously reported material referred to as ilerite, octosilicate, or RUB-18. High-field 1H NMR spectroscopy reveals differences between the materials in terms of the ordering of silanol groups on the surfaces of the layers, as well as the contents of the inter-layer space.

Solvothermal synthesis of cobalt nickel layered double hydroxides with a three-dimensional nano-petal structure for high-performance supercapacitors

2020 ◽  
Vol 4 (1) ◽  
pp. 337-346 ◽  
Author(s):  
Hailiang Chu ◽  
Ying Zhu ◽  
Tingting Fang ◽  
Junqiang Hua ◽  
Shujun Qiu ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Solvothermal Synthesis ◽  
High Performance ◽  
Three Dimensional ◽  
Rate Performance ◽  
Supercapacitor Electrode ◽  
Long Term Stability ◽  
Cobalt Nickel ◽  
Double Hydroxides

CoNi LDH-6 with a nano-petal structure was prepared, which exhibited excellent rate performance and long-term stability as a supercapacitor electrode.

Rational Design of Hierarchical CoS2/CuCo2S4 for Three-dimensional All-Solid-State Hybrid Supercapacitors with High Energy Density, Rate Efficiency and Operational Stability

2021 ◽  
Author(s):  
Yogesh Kumar Sonia ◽  
Mahesh Kumar Paliwal ◽  
Sumanta Kumar Meher
Keyword(s):  
Solid State ◽  
Rational Design ◽  
Three Dimensional ◽  
High Energy ◽  
High Energy Density ◽  
Superior Performance ◽  
Exchange Method ◽  
Hybrid Supercapacitors ◽  
Storage Energy ◽  
Density Rate

In the context to develop superior-performance all-solid-state hybrid supercapacitor devices, with excellent charge storage, energy & power density, working stability and rate efficiency, herein we have adopted an anion-exchange method...

Synthesis, Crystal Structure, and Theoretical Calculations of Two Cobalt, Nickel Coordination Polymers with 5-Nitroisophthalic Acid and Bis(imidazol) Ligands

2016 ◽  
Vol 69 (11) ◽  
pp. 1296 ◽  
Author(s):  
Ya-Ru Pan ◽  
Xiu-Mei Li ◽  
Jian-Ye Ji ◽  
Qing-Wei Wang
Keyword(s):  
Theoretical Calculations ◽  
Uv Spectroscopy ◽  
Three Dimensional ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
Cobalt Nickel ◽  
Hydrogen Bonding Interactions ◽  
Calculation Results ◽  
Covalent Interactions ◽  
2D Network

Two new complexes [Co(NIPH)(bimb)(H2O)]n (1) and [Ni(NIPH)(mbix)]n (2) (H2NIPH = 5-nitroisophthalic acid, bimb = 1,4-bis(imidazol-1-yl)butane, mbix = 1,3-bis(imidazol-1-ylmethyl)benzene) have been hydrothermally synthesised and structurally characterised by elemental analysis, IR spectroscopy, thermogravimetric analysis, UV spectroscopy, and single-crystal X-ray diffraction. Complex 1 exhibits a two-dimensional (2D) network, which was stabilised through O–H···O and C–H···O hydrogen-bonding interactions. Complex 2 shows a two-dimensional (2D) network structure, which was further extended into a three-dimensional supramolecular structure through C–H···O hydrogen bonds and π–π interactions. Moreover, we analysed the natural bond orbital (NBO) using the PBE0/LANL2DZ method in the Gaussian 03 program. The calculation results indicated the obvious covalent interactions between the coordinated atoms and the CoII or NiII ion.

A STUDY ON THE ELECTRODEPOSITION MECHANISM OF COBALT-NICKEL/COPPER MULTILAYER FROM SULFATE SOLUTION

2008 ◽  
Vol 22 (18n19) ◽  
pp. 3046-3059 ◽  
Author(s):  
S. S. MAHSHID ◽  
A. DOLATI
Keyword(s):  
Photoelectron Spectroscopy ◽  
Copper Ions ◽  
Three Dimensional ◽  
Compositional Analysis ◽  
Sulfate Solution ◽  
Nucleation Mechanism ◽  
Potential Range ◽  
Cyclic Voltammograms ◽  
Cobalt Nickel ◽  
Nickel Copper

The cobalt-nickel/copper multilayer films were prepared by electrodeposition process in sulfate solution using a three electrode cell. Cyclic voltammetry and double chronoampermetry techniques were utilized to characterize the multilayer system and to obtain the nucleation and growth mechanism. The cyclic voltammograms determined the reduction potential range of the three components and also clearly emphasized that electrodeposition of cobalt-nickel alloy was controlled by a kinetic process, while copper ions were reduced with diffusion-controlled mechanism. These results were confirmed with those which were extracted from the chronoampermetry curves. In addition, the current transients revealed that nucleation mechanism was a typical three-dimensional nucleation process. The Atomic Force Microscope images (AFM) of these multilayers also confirmed the three-dimensional nucleation mechanism. The compositional analysis of these multilayers was carried out by Atomic Absorption Spectroscopy (AAS) and X-ray Photoelectron Spectroscopy (XPS) methods. The bulk and surface compositional analysis both revealed that the amount of Copper component within the cobalt-nickel layers is less than 3%.

scholarly journals Cobalt–Nickel Oxides with Three-Dimensional Hexagon Films for High Performance Supercapacitors

NANO ◽  
2018 ◽  
Vol 13 (03) ◽  
pp. 1850032 ◽  
Author(s):  
Yinan Lv ◽  
Guixia Dong ◽  
Lei Li ◽  
Jingrui Kang ◽  
Weidan Han
Keyword(s):  
Nickel Oxide ◽  
High Performance ◽  
Electrode Materials ◽  
Three Dimensional ◽  
Chemical Precipitation ◽  
Precipitation Method ◽  
Nickel Ions ◽  
Cobalt Nickel ◽  
Nickel Oxide Electrode ◽  
Cobalt Nickel Oxide

Cobalt–nickel oxide electrode materials with three-dimensional hexagon films or flower-shaped structures have been synthesized by a chemical precipitation method at different thermal decomposition temperatures. Nickel ions enter into the lattice of Co3O4 by forming solid solution and promote primary nanoparticles partly self-assemble into three-dimensional hexagon films which interlace with each other to form a flower-like structure. Consequently, cobalt–nickel oxide with a Ni/Co mole ratio of 1:6 at 220[Formula: see text]C displays a highest capacitance of 796.16[Formula: see text]F/g at 200[Formula: see text]mA/g and cobalt–nickel oxide with a Ni/Co mole ratio of 1:3 at 200[Formula: see text]C exhibits a highest capacitance of 290[Formula: see text]F/g at 10[Formula: see text]A/g, which significantly improve the electrochemical properties of Co3O4.

Kaolin-Based Geopolymer Filled Epoxy-Layered Silicates: Compressive Properties

2015 ◽  
Vol 754-755 ◽  
pp. 220-224
Author(s):  
Yusrina Mat Daud ◽  
Kamarudin Hussin ◽  
Che Mohd Ruzaidi ◽  
Azlin Fazlin Osman ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Layered Silicate ◽  
Qualitative Evaluation ◽  
Layered Silicates ◽  
Compressive Properties ◽  
Compressive Test ◽  
Silicate Nanocomposites ◽  
Nanocomposite System ◽  
Dimensional Shape ◽  
Three Dimensional Shape

The present work aimed to study the effects of kaolin-based geopolymers in epoxy-layered silicate nanocomposites using a compressive test. A series of nanocomposites with kaolin-based geopolymers containing 1-7 phr content were prepared. A qualitative evaluation of the three-dimensional shape of a kaolin-based geopolymer surface and origin was characterised using the scanning electron microscopy (SEM). It was discovered that the addition of kaolin based geopolymer at the beginning, in low phr content, displayed a lower compressive strength than nanocomposites without kaolin based geopolymer filled. However, the compressive properties unexpectedly increased at 3phr of kaolin geopolymer content compared to nanocomposites without kaolin. This illustrated that the incorporation of kaolin geopolymers in the nanocomposite system can potentially improved the mechanical properties of the epoxy resin, thereby needs further exploration.

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