Electrochemical Performance Of Polytriphenylamine As A Novel Non-Aqueous Supercapcitor Cathode Material,
2011
State Key Lab of Physical Chemistry of Solid Surfaces,Department of Chemistry,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,Fujian,China;
Electrochemical Performance Of Polytriphenylamine As A Novel Non-Aqueous Supercapcitor Cathode Material, Qiu-Jie She, Zhi-Kai Wei, Ming-Sen Zheng, Quan-Feng Dong
Journal of Electrochemistry
The PTPAn/active carbon compounds were synthesized by heterogeneous precipitation method.The SEM results show that the size of the PTPAn decreases from about 150 nm to few ten nanometers after being incorporated with active carbon.The PTPAn/active carbon compounds have excellent rate and cycling performance:the discharge capacity increases from 88.5 mAh/g to 105 mAh/g at 0.5 C charge/discharge rate and can reach to 70 mAh/g even at 40 C charge/discharge rate.And the capacity retention of the PTPAn/active carbon compounds remain almost unchanged after 1000 cycles at 40 C charge/discharge rate.
Novel Anion Exchange Membranes Base On Copolymer Of 2-(Diethylamino) Ethyl Methacrylate And Fluoro-Polyacrylate For Alkaline Direct Methanol Fuel Cells,
2011
College Chemistry & Chemical Engineering,Xiamen University,Xiamen 361005,Fujian,China;
Novel Anion Exchange Membranes Base On Copolymer Of 2-(Diethylamino) Ethyl Methacrylate And Fluoro-Polyacrylate For Alkaline Direct Methanol Fuel Cells, Yan-Mei Zhang, Jun Fang, Ge Yan, Yong-Ze Zhuang
Journal of Electrochemistry
Anion exchange membrane fuel cells,which use anion exchange membranes as polyelectrolytes,have attracted more and more research interests recently.In this work,a series of hydroxyl-conducting anion-exchange membranes based on the copolymer of 2-(Diethylamino)ethyl methacrylate and fluoro-polyacrylate were prepared by radical polymerization,and their potential applications in alkaline fuel cells were assessed.It was shown that the ionic conductivity of the membranes reached 10-2 S·cm-1 at room temperature,while the methanol permeability was lower than 10-7 cm2·s-1.The maximum power density of fuel cell assembled with this membrane was achieved to be 43.2 mW·cm-2 at room temperature,indicating possible application …
Applications Of Raman Spectroscopy Technique In Lithium Ion Batteries,
2011
Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;
Applications Of Raman Spectroscopy Technique In Lithium Ion Batteries, Liang Zhao, Yong-Sheng Hu, Hong Li, Zhao-Xiang Wang, Hong-Xing Xu, Xue-Jie Huang, Li-Quan Chen
Journal of Electrochemistry
The Raman spectroscopy has been widely used in the study of lithium ion batteries.In this short review,we gave some examples of the applications of Raman spectroscopy in the study of electrode materials including carbonaceous materials,spinel LiMxMn2-x O4,LiFePO4,as well as polymer electrolytes,room temperaturemolten salt electrolytes and the solid-electrolyte interphase layers.The advantages and disadvantages of the ex-situ and in-situ Raman spectrum techniques are discussed.Using new Raman techniques to investigate Li-ion batteries are suggested.
Electrochemical Behaviors Of Nonionic Fluorosurfactant Zonyl Fsn Self-Assembled Monolayers On Au(111) And Au(100),
2011
State Key Laboratory for Physical Chemistry of Solid Surfaces,and Department of Chemistry,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,Fujian,China;
Electrochemical Behaviors Of Nonionic Fluorosurfactant Zonyl Fsn Self-Assembled Monolayers On Au(111) And Au(100), Yong-An Tang, Jia-Wei Yan, Feng Zhu, Chun-Feng Sun, Bing-Wei Mao
Journal of Electrochemistry
The electrochemical behaviors of nonionic fluorosurfactant Zonyl FSN self-assembled monolayers on Au(111) and Au(100) were investigated by electrochemical scanning tunneling microscopy and cyclic voltammetry.In the potential range where the redox reaction of FSN molecules doesn′t occur,the structures of FSN self-assembled monolayers are uniform,which may suppress the adsorption of sulfate and the surface reconstruction of Au single crystal.At the initial stage of the oxidation of Au(111) and Au(100) surfaces covered by FSN self-assembled monolayers,Au(111) surface is characteristic of some protuberance,while Au(100) surface is characteristic of the movement of steps,however the structures of FSN self-assembled monolayers keep unchanged.Compared with Au(100),FSN self-assembled monolayers …
Electrooxidation Of Methanol On Multilayer Films Of Polypyrrole-Platinum Electrode,
2011
Department of Chemistry,Shenyang Normal University,Shenyang 110034,China;
Electrooxidation Of Methanol On Multilayer Films Of Polypyrrole-Platinum Electrode, Ling Zhang, Long-Zhen Zheng
Journal of Electrochemistry
Multilayer films of polypyrrole-platinum electrode were fabricated by cyclic voltammetric technique.Electro-oxidation of methanol on this electrode was investigated with the aid of cyclic voltammetry and chronoamperometry.Results demonstrated that the multilayer of polypyrrole-platinum electrode behaved better electrocatalytic performance for electro-oxidaton of methanol and better poison resistant.Furthermore,with the increase of deposited platinum loadings,the rate controlling step on electro-oxidation reaction of methanol was changed from CO oxidation to sorption-desorption of hydrogen.
Electrochemical Capacitive Performance Of Polyaniline Electrode With Different Electrolytes,
2011
State Key laboratory of Gansu Advanced Non-ferrous Metal Materials,Lanzhou Univercity of Technology,Lanzhou 730050,China;
Electrochemical Capacitive Performance Of Polyaniline Electrode With Different Electrolytes, Yong-Tao Tan, Fen Ran, Ling-Ren Wang, Ji Liu, Ling-Bin Kong, Yong-Chun Luo, Long Kang
Journal of Electrochemistry
The polyaniline(PANi) for supercapacitor was prepared by chemical-oxidative polymerization.The SEM,FTIR data and electrochemical performance showed that,polyaniline nanoparticles were formed which were about 50 nm;the specific capacitances of PANi were 404 F/g,208 F/g and 279 F/g in 1 mol/L H2SO4,NaNO3 and KOH,respectively,when the current density was 5 mA/cm2.The concentrations of H2SO4 increased to 2 mol/L or 6 mol/L,the capacitances decreased to 330 F/g or 248 F/g.
Introduction For Professor Tian Zhao-Wu, Xiamen University, Member Of Cas,
2011
Xiamen University
Introduction For Professor Tian Zhao-Wu, Xiamen University, Member Of Cas, Qing-Yu Wu, Yi-Chun Wu
Journal of Electrochemistry
No abstract provided.
Chemistry: Our Life, Our Future--Celebrate The International Year Of Chemistry, 2011,
2011
Shanghai Normal University
Chemistry: Our Life, Our Future--Celebrate The International Year Of Chemistry, 2011, Zong-Rang Zhang
Journal of Electrochemistry
No abstract provided.
Preparation And Electrochemical Properties Of Sn Thin Film As Anode Materials For Lithium-Ion Batteries,
2011
Institute of New Energy and Material Chemistry,Key Laboratory of Advanced Energy Materials Chemistry-Ministry of Education,Nankai University,Tianjin 300071,China;
Preparation And Electrochemical Properties Of Sn Thin Film As Anode Materials For Lithium-Ion Batteries, Hong-Mei Bai, Zhan-Liang Tao, Fang-Yi Cheng, Jun Chen
Journal of Electrochemistry
Sn thin films as the anode materials of Li-ion batteries were prepared by vacuum-evaporation method on the copper foam substrate. The phase structure,surface morphology and electrochemical property of the as-prepared films were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM), and galvanostatic cycling. The results showed that three-dimensional structure of copper foam substrate enhanced the adhesion strength between the active material and the substrate, under the same substrate temperature, the particles became bigger with the increasing of evaporation time, while their electrochemical property decreased, under the same evaporation time, the particles didn′t changed obviously with the increasing of substrate temperature,while their cycle …
Electrocatalytic Oxidation Of Hydrazine At Rutin Carbon Nanotubes Modified Electrode,
2011
Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Materials Science,Northwest University,Xi'an 710069,China;
Electrocatalytic Oxidation Of Hydrazine At Rutin Carbon Nanotubes Modified Electrode, Hong-Fang Zhang, Qing-Lin Sheng, Jian-Bin Zheng
Journal of Electrochemistry
The electrochemical behavior and electrocatalytic oxidation of hydrazine on rutin multiwall carbon nanotubes modified glassy carbon electrode were studied by cyclic voltammetry.The experimental results indicated that the electrode exhibits good electrocatalytic activity to hydrazine at a reduced oxidation potential of 262 mV.The amperometric response of the modified electrode showed linear increase after successive addition of hydrazine in the concentration range of 2.5×10-6~1.0×10-4 mol·L-1 with a detection limit of 5×10-7 mol·L-1.
Electrochemical Double-Layer Capacitors Using Phenolic Resin-Based Carbon Fibers,
2011
Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,Liaoning,China;
Electrochemical Double-Layer Capacitors Using Phenolic Resin-Based Carbon Fibers, Rong Xue, Jing-Wang Yan, Ying Tian, Bao-Lian Yi
Journal of Electrochemistry
Phenolic resin-based activated carbon fiber(ACF) was prepared by KOH activation.The electrochemical properties of pulverized phenolic resin-based carbon fiber(P-ACF) were examined in 6 mol·L-1 KOH compared with that of the original ACF.P-ACF exhibited a better capacitive behavior and showed a larger specific capacitance(200 F·g-1) as well as a lower capacitance decrease at high current densities.The pore resistance for ion migration(Rp) in P-ACF was lower(2.96 Ω) than that in ACF(4.65 Ω).Pulverization increased the exposure of the cross section,lowered the contact resistance between the carbon fibers and decreased the pore resistance for ion migration.
Low-Temperature Performance Of Li-Ion Battery With Fluoroethylene Carbonate Electrolyte,
2011
Beijing Higher Institution Engineering Research Center of Power Battery and Chemical Energy Materials School of Chemical Engineering and Environment Science,Beijing Institute of Technology, Beijing 100081,China;
Low-Temperature Performance Of Li-Ion Battery With Fluoroethylene Carbonate Electrolyte, Chun-Wei Yang, Feng Wu, Bo-Rong Wu, Yong-Huan Ren, Jing-Wen Yao
Journal of Electrochemistry
The low temperature performance of electrolytes containing FEC including FEC+EMC, EC and PC, as well as the compatibility of electrolytes with LiFePO4 anode and with MCMB cathode were investigated.The electrolyte exhibits a high value of ionic conductivity at low temperature.The stability of cathode was enhanced by the formation of SEI film at 1.6 V as a result of FEC reaction. The infrared spectra showed that FEC can suppress decomposition of other solvents during SEI formation, and lower the resistance of SEI on MCMB cathode. The electrochemistry test indicates that Li-ion batteries with FEC electrolyte display high capacity at low …
Interaction Of The Epirubicin Hydrochloride With Bovine Serum Albumin And Its Application,
2011
School of Chemistry and Chemical Engineering,Shanxi University,Taiyuan 030006,China;
Interaction Of The Epirubicin Hydrochloride With Bovine Serum Albumin And Its Application, Hong-Fen Cheng, Yong Zhang, Jie-Qiong Song, Zeng-Qiao Wang
Journal of Electrochemistry
The linear sweep technique was used to study the electrochemical behavior of epirubicin hydrochloride.The results showed that there was a sensitive reduction peak at-0.34 V(vs.SCE) in pH 6.80 Tris-HCl buffer.When the BSA was added,the value of the reduction peak was reduced deeply.Accordingly,a new electrchemical determintation method of BSA was established.Under the optimum conditions,the decrease of the reduction peak currents of epirubicin hydrochloride were proportional to the concentrations of BSA in the range of 1.0×10-9～1.0×10-6 mol·L-1(R=0.9973).The detection limit of the BSA was 8.05×10-10 mol·L-1.And the binding constant β of the epirubicin hydrochloride and …
Electrochemical Deposition Of Zinc Oxide Crystal Whiskers,
2011
College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Institute of Clean Technique for Chemical Engineering, Taiyuan 030024, Shanxi, China;
Electrochemical Deposition Of Zinc Oxide Crystal Whiskers, Peng-Zeng Lu, Su Li, Jin-Qian Jia, Zhen-Hai Liang
Journal of Electrochemistry
Pine needle ZnO crystal whiskers were electrodeposited by anodization of zinc foil.The crystal whiskers were characterized by scanning electron microscopy(SEM) and X-ray diffraction(XRD) spectroscopy.The results show that the lengths and diameters of ZnO crystal whiskers are 200~300 nm and 20~50 nm,respectively,with the ratio of the length to diameter ranging from 10~15.The whiskers belong to wurtzite ZnO(JCPDS 36-1451) with good crystallinity and high purity.The crystalization behavior of ZnO was studied by cyclic voltammetry.The effects of the surface oxide layer at the zinc substrates and the [Zn(OH)4]2-concentration of the aqueous electrolyte on the formation of zinc oxide whiskers …
Determinations In Reducing Degree Of Iron-Amine Complex By Cyclic Voltammetry,
2011
Key Laboratory of Science & Technology of Eco-Textile,Ministry of Education, Donghua University,Shanghai 201620,China;
Determinations In Reducing Degree Of Iron-Amine Complex By Cyclic Voltammetry, Yu-Kun Lai, Wei Wang
Journal of Electrochemistry
The veracity and influence factors in reducing degree on iron-amine complex were tested by cyclic voltammetry.The types of cathode electrolytes including ferric nitrate,triethanolamine,sodium hydroxide and calcium nitrate were optimized.Compared with dip-dyeing coloration method,the cyclic voltammetry method can be used to measure the reducing degree of iron-amine complex more accurately with better stability,easier and faster operation.Potential applications of cyclic voltammetric determination method can be found in the fields of electrochemical dye production and related quality control.
Variable Frequency And Programmable Wave Power Supply Based On Dsp,
2011
Department of Chemistry,Xiamen University,Xiamen 361005,Fujian,China;
Variable Frequency And Programmable Wave Power Supply Based On Dsp, Xiang-Dong Zhuo
Journal of Electrochemistry
This paper describes a ultra-low frequency,variable frequency and programmable wave power supply used for anodic corrosion of aluminum foils in electrolytic capacitors.Such a power supply is designed based on DSP and has stable output current and frequency.The output waveform is user programmable so that the corrosion process can be controlled according to the parameters set by users.
Investigations Into Late Transition Metal Pincer Complexes As Possible Direct Partial Oxidation Catalysts,
2011
University of New Mexico
Investigations Into Late Transition Metal Pincer Complexes As Possible Direct Partial Oxidation Catalysts, Raymond B. Lansing Jr.
Chemistry and Chemical Biology ETDs
This investigation examined aspects of a potential catalytic route for the partial oxidation of organic substrates using molecular oxygen as the oxidant. The proposed cycle begins with the insertion of molecular oxygen into a metal hydride bond to generate a metal hydroperoxide. The next step involves the transfer of an oxygen atom to an acceptor substrate to generate an oxidized species and a metal hydroxide. The starting metal hydride can then be regenerated in two viable ways, either through use of CO or H2. The experimental plan involved the syntheses and characterization of new inorganic and organometallic complexes, …
Studies Of A Cyanine-Based Biosensor And Light-Induced Antibacterial Activities Of Oligo(Phenylene Ethynylene)S,
2011
University of New Mexico
Studies Of A Cyanine-Based Biosensor And Light-Induced Antibacterial Activities Of Oligo(Phenylene Ethynylene)S, Zhijun Zhou
Chemistry and Chemical Biology ETDs
This dissertation has been focusing on two subjects: biosensor development and light-activated antimicrobials. A cyanine-based fluorescent biosensor is developed with high sensitivity to detect the presence and activity of caspase-3/7. We demonstrated that supramolecular self-assembly can be useful for designing biosensors. A series of p-Phenylene Ethynylenes (OPEs) have been synthesized. Further photophysical studies show that these molecules have good singlet oxygen yields. The antimicrobial capability increases dramatically when exposed to UV-365 radiation, though dark biocidal activity can be obtained as well. This phenomenon is probably due to the high yields of singlet oxygen of these OPEs, which oxidizes unsaturated membrane …
Human Mitochondrial Hotdog-Fold Thioesterase: Hthem4 And Hthem5,
2011
University of New Mexico
Human Mitochondrial Hotdog-Fold Thioesterase: Hthem4 And Hthem5, Hong Zhao
Chemistry and Chemical Biology ETDs
Hotdog-fold acyl-CoA thioesterases (ACOTs) are found in all three kingdoms of life (Archaea, Bacteria and Eukarya). All the hotdog-fold thioesterases share common catalytic scaffold and function: hydrolysis of acyl-CoA or acyl-ACP (acyl carrier protein). However the biological roles that they perform vary greatly, different substrate specificity and catalytic efficiency assign unique set of biological functions to each of them, which is further defined by tissue distribution, cellular location, protein partners and regulators. The focuses of my doctoral studies, described in this dissertation, are two members of the human hotdog-fold thioesterase superfamily: human THEM4 and human THEM5. The genes encoding hTHEM4 …
Studies On Group 10 Pincer Carbene Metal Complexes,
2011
University of New Mexico
Studies On Group 10 Pincer Carbene Metal Complexes, Agnes Mrutu
Chemistry and Chemical Biology ETDs
Selective oxidation chemistry is a topic of intense interest worldwide, in particular when using molecular oxygen (O2) directly as the oxidizing species. The primary reason for using O2 rather than other oxidants is to take advantage of the inexpensive nature of oxygen; however, the radical ground state of O2 leads to non-selective reactions with organic substrates. As such, basic knowledge and understanding involving the fundamental reactions of O2 with organometallic species will be required in order to overcome this lack of selectivity. The work presented in this dissertation has two main research goals to help …
