scholarly journals Nickel Salicylaldoxime-Based Coordination Polymer as a Cathode for Lithium-Ion Batteries

Energies ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2480
Author(s):  
Evgenii V. Beletskii ◽  
Daniil A. Lukyanov ◽  
Petr S. Vlasov ◽  
Andrei N. Yankin ◽  
Arslan B. Atangulov ◽  
...  
Keyword(s):  
Energy Storage ◽  
Cathode Materials ◽  
Lithium Ion ◽  
Building Blocks ◽  
Organic Polymer ◽  
Galvanostatic Charge ◽  
X Ray ◽  
Storage Performance ◽  
Redox Active ◽  
Metal Organic

Conjugated coordination polymers attract attention as materials for electrochemical energy storage, mostly as cathode materials for supercapacitors. Faradaic capacity may be introduced to such materials using redox-active building blocks, metals, or ligands. Using this strategy, a novel hybrid cathode material was developed based on a Ni2+ metal-organic polymer. The proposed material, in addition to double-layer capacitance, shows high pseudocapacitance, which arises from the contributions of both the metal center and ligand. A tailoring strategy in the ligand design allows us to minimize the molecular weight of the ligand, which increases its gravimetric energy. According to computational results, the ligand makes the prevailing contribution to the pseudocapacitance of the material. Different approaches to metal–organic polymer (MOP) synthesis were implemented, and the obtained materials were examined by FTIR, Raman spectroscopy, powder XRD, SEM/EDX (energy-dispersive X-ray spectroscopy), TEM, and thermal analysis. Energy-storage performance was comparatively studied with cyclic voltammetry (CV) and galvanostatic charge–discharge (GCD). As a result, materials with an excellent discharge capacity were obtained, reaching the gravimetric energy density of common inorganic cathode materials.

A New POM-Based Supramolecular Compound: Synthesis, Structure and Adsorptive Property of [Cu(phen)2]3[W6O19]

2014 ◽  
Vol 919-921 ◽  
pp. 2013-2016 ◽  
Author(s):  
Ya Bing Liu ◽  
Hong Jie Wang ◽  
Hong Kai Zhao
Keyword(s):  
Three Dimensional ◽  
Building Blocks ◽  
Monoclinic Space Group ◽  
X Ray Diffraction ◽  
Hybrid Compound ◽  
Adsorptive Property ◽  
X Ray ◽  
Hydrogen Bonding Interactions ◽  
Compound Synthesis ◽  
Metal Organic

A POM - based organice - inorganic hybrid compound with the chemical formula of[Cu (phen)2]3[W6O19] (phen = 1,10-phenanthroline) (1) has been hydrothermally synthesized andstructurally characterized by the elemental analysis, and single crystal X-ray diffraction. Compound 1 crystallizes in the monoclinic space groupC2/c witha=18.319(4) Å,b= 17.311(4) Å,c= 22.248(4) Å,β= 112.40(3) o,V= 6523(2) Å3,Z= 4, R1= 0.0448, andwR2=0.1218. Compound 1 consists of the [W6O19]3-building blocks and [Cu (phen)2]+metal organic cationic moieties, which are packed together via the extensive hydrogen-bonding interactions to form a three-dimensional supramolecular framework. The adsorption of methylene blue (MB) under UV irradiation with 1 as the heterogeneous adsorbent has been investigated, showing a good adsorptive property of 1 for MB degradation.

scholarly journals Mechanical energy storage performance of an aluminum fumarate metal–organic framework

2016 ◽  
Vol 7 (1) ◽  
pp. 446-450 ◽  
Author(s):  
Pascal G. Yot ◽  
Louis Vanduyfhuys ◽  
Elsa Alvarez ◽  
Julien Rodriguez ◽  
Jean-Paul Itié ◽  
...  
Keyword(s):  
Energy Storage ◽  
Mechanical Energy ◽  
Metal Organic Framework ◽  
Storage Performance ◽  
Metal Organic ◽  
Organic Framework

Determination of the mechanical energy storage performance of the aluminum fumarate metal–organic framework A520.

scholarly journals In situ X-ray Diffraction Investigation of the Crystallisation of Perfluorinated Ce(IV)-based Metal-Organic Frameworks with UiO-66 and MIL-140 architectures

2020 ◽  
Author(s):  
Stephen Shearan ◽  
Jannick Jacobsen ◽  
Ferdinando Costantino ◽  
Roberto D’Amato ◽  
Dmitri Novikov ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Metal Organic Frameworks ◽  
Building Blocks ◽  
Nucleation And Growth ◽  
X Ray Diffraction ◽  
X Ray ◽  
Rate Determining Step ◽  
Wide Range ◽  
Metal Organic

We report on the results of a thorough <i>in situ</i> synchrotron powder X-ray diffraction study of the crystallisation in aqueous medium of two recently discovered perfluorinated Ce(IV)-based metal-organic frameworks (MOFs), analogues of the already well investigated Zr(IV)-based UiO-66 and MIL-140A, namely, F4_UiO-66(Ce) and F4_MIL-140A(Ce). The two MOFs were originally obtained in pure form in similar conditions, using ammonium cerium nitrate and tetrafluoroterephthalic acid as building blocks, and small variations of the reaction parameters were found to yield mixed phases. Here, we investigate the crystallisation of these compounds <i>in situ</i> in a wide range of conditions, varying parameters such as temperature, amount of the protonation modulator nitric acid (HNO<sub>3</sub>) and amount of the coordination modulator acetic acid (AcOH). When only HNO<sub>3</sub> is present in the reaction environment, F4_MIL-140A(Ce) is obtained as a pure phase. Heating preferentially accelerates nucleation, which becomes rate determining below 57 °C, whereas the modulator influences nucleation and crystal growth to a similar extent. Upon addition of AcOH to the system, alongside HNO<sub>3</sub>, mixed-phased products, consisting of F4_MIL-140A(Ce) and F4_UiO-66(Ce), are obtained. In these conditions, F4_UiO-66(Ce) is always formed faster and no interconversion between the two phases occurs. In the case of F4_UiO-66(Ce), crystal growth is always the rate determining step. An increase in the amount of HNO<sub>3</sub> slows down both nucleation and growth rates for F4_MIL-140A(Ce), whereas nucleation is mainly affected for F4_UiO-66(Ce). In addition, a higher amount HNO<sub>3</sub> favours the formation of F4_MIL-140A(Ce). Similarly, increasing the amount of AcOH leads to slowing down of the nucleation and growth rate, but favours the formation of F4_UiO-66(Ce). The pure F4_UiO-66(Ce) phase could also be obtained when using larger amounts of AcOH in the presence of minimal HNO<sub>3</sub>. Based on these <i>in situ</i> results, a new optimised route to achieving a pure, high quality F4_MIL-140A(Ce) phase in mild conditions (60 °C, 1 h) is also identified.

High-efficiency sacrificial prelithiation of lithium-ion capacitors with superior energy-storage performance

2020 ◽  
Vol 24 ◽  
pp. 160-166 ◽  
Author(s):  
Congkai Sun ◽  
Xiong Zhang ◽  
Chen Li ◽  
Kai Wang ◽  
Xianzhong Sun ◽  
...  
Keyword(s):  
Energy Storage ◽  
High Efficiency ◽  
Lithium Ion ◽  
Storage Performance

Ultrafine ternary metal oxide particles with carbon nanotubes: a metal–organic-framework-based approach and superior lithium-storage performance

2019 ◽  
Vol 48 (13) ◽  
pp. 4413-4419 ◽  
Author(s):  
Xuxu Tang ◽  
Ming Liang ◽  
Yanfeng Zhang ◽  
Weiwei Sun ◽  
Yong Wang
Keyword(s):  
Metal Oxide ◽  
Metal Organic Framework ◽  
Metal Oxide Nanoparticles ◽  
Lithium Ion ◽  
Lithium Storage ◽  
Storage Performance ◽  
Ternary Metal ◽  
Metal Organic ◽  
Oxide Particles ◽  
Organic Framework

A metal–organic-framework template approach was used to fabricate ultrafine ternary metal oxide nanoparticles embedded in CNTs, which exhibit larger-than-theoretical reversible capacities for lithium-ion batteries.

Hierarchical nickel nanowire@NiCo2S4 nanowhisker composite arrays with a test-tube-brush-like structure for high-performance supercapacitors

2018 ◽  
Vol 6 (31) ◽  
pp. 15284-15293 ◽  
Author(s):  
Jie Liao ◽  
Peichao Zou ◽  
Songyang Su ◽  
Adeela Nairan ◽  
Yang Wang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Energy Storage ◽  
Cathode Materials ◽  
High Performance ◽  
State Of The Art ◽  
Test Tube ◽  
Asymmetric Supercapacitor ◽  
Storage Performance ◽  
Array Electrode ◽  
Nickel Nanowire

An asymmetric supercapacitor consisting of a NiCo2S4 nanowhisker-array electrode and activated carbon shows state-of-the-art energy storage performance for NiCo2S4-based cathode materials at the device level.

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