scholarly journals Solvothermal Preparation of Spherical Bi2O3 Nanoparticles Uniformly Distributed on Ti3C2Tx for Enhanced Capacitive Performance

2021 ◽  
Author(s):  
Tao Li ◽  
Xuefeng Chang ◽  
Lifang Mei ◽  
Xiayun Shu ◽  
Jidong Ma ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Chemical Stability ◽  
Layered Structure ◽  
Layered Material ◽  
Two Dimensional ◽  
Capacitive Performance ◽  
Solvothermal Preparation

Ti3C2Tx is a promising new two-dimensional layered material for supercapacitors with good electrical conductivity and chemical stability. However, Ti3C2Tx has problems such as collapse of the layered structure and low...

A two-dimensional semiconducting covalent organic framework with nickel(ii) coordination for high capacitive performance

2019 ◽  
Vol 7 (34) ◽  
pp. 19676-19681 ◽  
Author(s):  
Tao Li ◽  
Wen-Da Zhang ◽  
Yong Liu ◽  
Yunxing Li ◽  
Caikun Cheng ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Specific Capacitance ◽  
High Specific Capacitance ◽  
Two Dimensional ◽  
Capacitive Performance ◽  
Covalent Organic Framework ◽  
Organic Framework

A 2D covalent organic framework with excellent electrical conductivity and a highly conjugated planar skeleton exhibits a markedly high specific capacitance of 1257 F g−1.

scholarly journals Acid-triggered interlayer sliding of two-dimensional copper(i)–organic frameworks: more metal sites for catalysis

2021 ◽  
Author(s):  
Hou-Gan Zhou ◽  
Ri-Qin Xia ◽  
Ji Zheng ◽  
Daqiang Yuan ◽  
Guo-Hong Ning ◽  
...  
Keyword(s):  
Chemical Stability ◽  
Two Dimensional ◽  
Catalytic Activities

The addition of TFA can trigger the interlay sliding of 2D copper(i) organic frameworks prepared by combing the chemistry of MOFs and COFs. The variation of interlay stacking largely affected the porosity, chemical stability and catalytic activities.

A new one-dimensional CdIIcoordination polymer with a two-dimensional layered structure incorporating 2-[(1H-imidazol-1-yl)methyl]-1H-benzimidazole and benzene-1,2-dicarboxylate ligands

2016 ◽  
Vol 72 (6) ◽  
pp. 480-484 ◽  
Author(s):  
Qiu-Ying Huang ◽  
Xiao-Yi Lin ◽  
Xiang-Ru Meng
Keyword(s):  
Layered Structure ◽  
Room Temperature ◽  
Weak Interactions ◽  
Coordination Geometry ◽  
Dimensional Chain ◽  
Two Dimensional ◽  
One Dimensional ◽  
Heterocyclic Ligand ◽  
Rich Variety ◽  
Solvent Molecules

The N-heterocyclic ligand 2-[(1H-imidazol-1-yl)methyl]-1H-benzimidazole (imb) has a rich variety of coordination modes and can lead to polymers with intriguing structures and interesting properties. In the coordination polymercatena-poly[[cadmium(II)-bis[μ-benzene-1,2-dicarboxylato-κ4O1,O1′:O2,O2′]-cadmium(II)-bis{μ-2-[(1H-imidazol-1-yl)methyl]-1H-benzimidazole}-κ2N2:N3;κ2N3:N2] dimethylformamide disolvate], {[Cd(C8H4O4)(C11H10N4)]·C3H7NO}n, (I), each CdIIion exhibits an irregular octahedral CdO4N2coordination geometry and is coordinated by four O atoms from two symmetry-related benzene-1,2-dicarboxylate (1,2-bdic2−) ligands and two N atoms from two symmetry-related imb ligands. Two CdIIions are connected by two benzene-1,2-dicarboxylate ligands to generate a binuclear [Cd2(1,2-bdic)2] unit. The binuclear units are further connected into a one-dimensional chain by pairs of bridging imb ligands. These one-dimensional chains are further connected through N—H...O hydrogen bonds and π–π interactions, leading to a two-dimensional layered structure. The dimethylformamide solvent molecules are organized in dimeric pairsviaweak interactions. In addition, the title polymer exhibits good fluorescence properties in the solid state at room temperature.

scholarly journals Effect of dispersity of particle length on electrical conductivity of two-dimensional systems

2019 ◽  
Vol 1163 ◽  
pp. 012006
Author(s):  
Yuri Yu Tarasevich ◽  
Andrei V Eserkepov ◽  
Irina V Vodolazskaya ◽  
Petr G Selin ◽  
Valentina V Chirkova ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Two Dimensional ◽  
Particle Length

Influence of Sintering Additive on the Electrical Conductivity, Chemical Stability and Sinterability of BaCe0.55Zr0.3Y0.15O3- 

2015 ◽  
Vol 68 (1) ◽  
pp. 467-471
Author(s):  
H. An ◽  
D. Shin ◽  
S.-M. Choi ◽  
J. Hong ◽  
K. J. Yoon ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Chemical Stability ◽  
Sintering Additive

scholarly journals Electrical conductivity in a non-covalent two-dimensional porous organic material with high crystallinity

2021 ◽  
Author(s):  
Qizhi Xu ◽  
Boyuan Zhang ◽  
Yihang Zeng ◽  
Amirali Zangiabadi ◽  
Hongwei Ni ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Organic Material ◽  
Field Effect ◽  
Field Effect Transistor ◽  
Van Der Waals Interactions ◽  
Two Dimensional ◽  
Porous Films ◽  
Top Down ◽  
High Crystallinity ◽  
Effect Transistor

Ultrathin porous films held together by non-covalent van der Waals interactions was obtained by a top-down approach, which is then utilized as channel material in a two-dimensional planar field-effect transistor device through easy stamp transfer.

scholarly journals Insights into the electric double-layer capacitance of two-dimensional electrically conductive metal-organic frameworks

2021 ◽  
Author(s):  
Jamie W. Gittins ◽  
Chloe J. Balhatchet ◽  
Yuan Chen ◽  
Cheng Liu ◽  
David G. Madden ◽  
...  
Keyword(s):  
Double Layer ◽  
Electric Double Layer ◽  
Electrode Materials ◽  
Metal Organic Frameworks ◽  
Significant Finding ◽  
Two Dimensional ◽  
Electrically Conductive ◽  
Capacitive Performance ◽  
Metal Organic ◽  
Organic Linker

Two-dimensional electrically conductive metal-organic frameworks (MOFs) have emerged as promising model electrodes for use in electric double-layer capacitors (EDLCs). However, a number of fundamental questions about the behaviour of this class of materials in EDLCs remain unanswered, including the effect of the identity of the metal node and organic linker molecule on capacitive performance and the limitations of current conductive MOFs in these devices relative to traditional activated carbon electrode materials. Herein, we address both these questions via a detailed study of the capacitive performance of the framework Cu<sub>3</sub>(HHTP)<sub>2</sub> (HHTP = 2,3,6,7,10,11-hexahydroxytriphenylene) with an acetonitrile-based electrolyte, finding a specific capacitance of 110 – 114 F g<sup>−1</sup> at current densities of 0.04 – 0.05 A g<sup>−1</sup> and a modest rate capability. By, directly comparing its performance with the previously reported analogue, Ni<sub>3</sub>(HITP)<sub>2</sub> (HITP = 2,3,6,7,10,11-hexaiminotriphenylene), we illustrate that capacitive performance is largely independent of the identity of the metal node and organic linker molecule in these nearly isostructural MOFs. Importantly, this result suggests that EDLC performance in general is uniquely defined by the 3D structure of the electrodes and the electrolyte, a significant finding not demonstrated using traditional electrode materials. Finally, we probe the limitations of Cu<sub>3</sub>(HHTP)<sub>2</sub> in EDLCs, finding a limited cell voltage window of 1.3 V and only a modest capacitance retention of 81 % over 30,000 cycles, both significantly lower than state-of-the-art porous carbons. These important insights will aid the design of future conductive MOFs with greater EDLC performances.

scholarly journals The Layered Structure of Cu2(H2O)4[C4H4N2][C6H2(COO)4]·2H2O

2019 ◽  
Author(s):  
Roberto Köferstein
Keyword(s):  
Nitrogen Atom ◽  
Single Crystals ◽  
Silica Gel ◽  
Layered Structure ◽  
Water Molecules ◽  
Two Dimensional ◽  
Space Group ◽  
Distorted Octahedral ◽  
Oxygen Atoms

Triclinic single crystals of Cu2(H2O)4[C4H4N2][C6H2(COO)4]·2H2O have been grown in anaqueous silica gel. Space group P-1 (Nr. 2), a = 723.94(7) pm, b = 813.38(14) pm, c = 931.0(2) pm, α = 74.24(2)°, β = 79.24(2)°, γ = 65.451(10)°, V = 0.47819(14) nm3, Z = 1. Cu2+ is coordinated in a distorted, octahedral manner by two water molecules, three oxygen atoms ofthe pyromellitate anions and one nitrogen atom of pyrazine (Cu—O 194.1(2)–229.3(3) pm;Cu–N 202.0(2) pm). The connection of Cu2+ and [C6H2(COO)4)]4− yields infinite strands,which are linked by pyrazine molecules to form a two-dimensional coordination polymer.Thermogravimetric analysis in air showed that the dehydrated compound was stable between175 and 248 °C. Further heating yielded CuO.

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