scholarly journals New Unsymmetrically Benzene-Fused Bis (Tetrathiafulvalene): Synthesis, Characterization, Electrochemical Properties and Electrical Conductivity of Their Materials

2014 ◽  
Vol 15 (3) ◽  
pp. 4550-4564 ◽  
Author(s):  
Tahar Abbaz ◽  
Amel Bendjeddou ◽  
Abdelkrim Gouasmia ◽  
Didier Villemin ◽  
Takashi Shirahata
Keyword(s):  
Electrical Conductivity ◽  
Electrochemical Properties

scholarly journals Biomass-derived carbon electrodes for supercapacitors and hybrid solar cells: towards sustainable photo-supercapacitors

2021 ◽  
Author(s):  
Nilanka M. Keppetipola ◽  
Céline Olivier ◽  
Thierry Toupance ◽  
Ludmila Cojocaru
Keyword(s):  
Electrical Conductivity ◽  
Solar Cells ◽  
Electrochemical Properties ◽  
Carbon Materials ◽  
Low Cost ◽  
Carbon Electrodes ◽  
Hybrid Solar Cells ◽  
Potential Applications ◽  
Electrodes For Supercapacitors

Due to their outstanding electrochemical properties, electrical conductivity, flexibility, and low-cost, carbon materials open up new opportunities for the design of compact devices with a wide variety of potential applications....

Research on the Synthesis and Electrochemical Properties of Poly-Peri-Naphthalene

2012 ◽  
Vol 622-623 ◽  
pp. 1262-1268
Author(s):  
Bo Rong Wu ◽  
Fei Biao Chen ◽  
Yun Kui Xiong ◽  
Wei Ling Liao
Keyword(s):  
Electrical Conductivity ◽  
Cathode Material ◽  
Electrochemical Properties ◽  
Discharge Capacity ◽  
Lithium Battery ◽  
Active Material ◽  
High Capacity ◽  
Synthesis Temperature ◽  
Electrolytic Solution ◽  
Different Temperatures

With the features of good electrical conductivity, and insolubilization in the electrolytic solution, Poly-Peri-Naphthalene (PPN) can be regarded as the cathode material, and there is a certain necessity to study the electrochemical properties of PPN. PPN can be synthesized easily by 3, 4, 9, 10-perylenetetracarboxylic dianhydride (PTCDA), and the related characterizations regarding to PPN is described in this paper. Meanwhile, research on the electrochemical properties of the synthesized PPN under several different temperatures has been carried out, and some basic laws have been found as follows: 1) Under the condition of 600°C≦T≦1100°Csynthesis temperature, the electrical conductivity of PPN is strengthrened with the increased temperature; 2) The discharge capacity of PPN is also increased with the increased synthesis temperature. 3) As a kind of battery cathode active material, the cyclical stability of PPN is excellent. But the capacity is small, aiming at the deficiency, nitrification treatment on the PPN has been carried out, thus the high-capacity PPN is obtained, the first discharge capacity is 342mAhg-1. Therefore, we can safely predict that the future of PPN as a lithium battery cathode material is promising.

Ion Beam Modification of Carbon Materials

2005 ◽  
Vol 107 ◽  
pp. 107-110
Author(s):  
Masaya Iwaki
Keyword(s):  
Electrical Conductivity ◽  
Wear Resistance ◽  
Cell Adhesion ◽  
Ion Implantation ◽  
Electrochemical Properties ◽  
Surface Properties ◽  
Carbon Materials ◽  
Ion Beam ◽  
Ion Beam Modification ◽  
Ion Species

A study has been made of surface properties of carbon materials modified by ion beams. Substrates used were natural diamonds, glass-like carbon plates and polymer sheets. Ion species were chemically-active elements such as C, N and O, inert gas elements such as He, Ne and Ar, and metallic elements such as Cr and Ti. It was found that diamond becomes electrically conductive in ion implanted layers, which are amorphous or graphite-like structures. Electrical conductivity depends on implanted species, doses and target temperatures. It was found that glass-like carbon consisting of graphite and disordered graphite becomes amorphous due to ion beam bombardment. Amorphization causes the wear resistance to improve. The electrochemical properties changes depending on implanted species. The wear resistance and electrochemical properties depended on the target temperature during ion implantation. Ion beam bombardment to polymers has been carried out to control the electrical conductivity, cell adhesion and bio-compatibility. The electrical conductivity of polyimide films increases as the dose increases. The saturated sheet resistivity of implanted layers depends on ion species, dose and dose rate. It was found that the cell adhesion can be controlled by ion beam bombardment. The results were used in the fields of clinical examinations. In summary, ion beam bombardment to carbon materials is useful to control the carbon structures and surface properties depending on ion implantation conditions.

The Development of Conductive Pastes for Solar Cells

2012 ◽  
Vol 557-559 ◽  
pp. 1201-1204
Author(s):  
Jung Ting Tsai ◽  
Chun Yuan Huang ◽  
Shung Tian Lin
Keyword(s):  
Electrical Conductivity ◽  
Solar Cells ◽  
Electrochemical Properties ◽  
Conversion Efficiency ◽  
Sintering Temperature ◽  
Low Cost ◽  
Glass Frit ◽  
Organic Binder ◽  
Semiconductor Substrate ◽  
Physical Chemical

Electrode pastes are used in solar cells for the formation of electrodes at both ends of the semiconductor substrate. The physical, chemical, and electrochemical properties of electrode pastes have important influences on the conversion efficiency and stability of the solar cells. Generally speaking, the constituents of electrode paste include organic binder, solvent, metallic conductive powders, glass frit, and some minor additives, all specially formulated to attain the properties of good electrical conductivity, wide sintering temperature, low warp, low pollution, and low cost.

Electrochemical Properties of Pristine and Vanadium Doped LiFePO4 Nanocrystallized Glasses

Energies ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 8042
Author(s):  
Justyna E. Frąckiewicz ◽  
Tomasz K. Pietrzak ◽  
Maciej Boczar ◽  
Dominika A. Buchberger ◽  
Marek Wasiucionek ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Electrochemical Performance ◽  
Electrochemical Properties ◽  
Cathode Materials ◽  
Nanocrystalline Materials ◽  
High Performance ◽  
Glassy Matrix ◽  
Capacity Fade ◽  
X Ray ◽  
Relative Capacity

In our recent papers, it was shown that the thermal nanocrystallization of glassy analogs of selected cathode materials led to a substantial increase in electrical conductivity. The advantage of this technique is the lack of carbon additive during synthesis. In this paper, the electrochemical performance of nanocrystalline LiFePO4 (LFP) and LiFe0.88V0.08PO4 (LFVP) cathode materials was studied and compared with commercially purchased high-performance LiFePO4 (C-LFP). The structure of the nanocrystalline materials was confirmed using X-ray diffractometry. The laboratory cells were tested at a wide variety of loads ranging from 0.1 to 3 C-rate. Their performance is discussed with reference to their microstructure and electrical conductivity. LFP exhibited a modest electrochemical performance, while the gravimetric capacity of LFVP reached ca. 100 mAh/g. This value is lower than the theoretical capacity, probably due to the residual glassy matrix in which the nanocrystallites are embedded, and thus does not play a significant role in the electrochemistry of the material. The relative capacity fade at high loads was, however, comparable to that of the commercially purchased high-performance LFP. Further optimization of the crystallites-to-matrix ratio could possibly result in further improvement of the electrochemical performance of nanocrystallized LFVP glasses.

Electrochemical Properties of P-Doped Silicon Thin Film Anodes of Lithium Ion Batteries

2013 ◽  
Vol 737 ◽  
pp. 80-84 ◽  
Author(s):  
Arenst Andreas Arie ◽  
Joong Kee Lee
Keyword(s):  
Electrical Conductivity ◽  
Electrochemical Properties ◽  
Lithium Ion Batteries ◽  
Specific Capacity ◽  
High Capacity ◽  
Lithium Ion ◽  
Charge Transfer Resistance ◽  
Commercial Application ◽  
Silicon Thin Film ◽  
Transfer Resistance

Silicon would seem to be a possible candidate to replace graphite or carbon as anode materials for lithium ion batteries based on its potential high capacity of 4200 mAhg-1. The main problem that must be solved for commercial application of silicon as anode material was the poor cyclic performance due to severe volume expansion during repeated charged-discharged cycles and its low electrical conductivity. In this work, we proposed Phosphorus doped (P-doped) Si films as anodes in lithium ion batteries. The electrochemical properties of the silicon based electrodes were examined by means of charge-discharge and impedance test. In comparison with the bare silicon electrode, the P type silicon electrode exhibited higher specific capacity of 2585 mAhg-1 until the 50th cycle. It was attributed to the improved electrical conductivity of Si film and reduced charge transfer resistance

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