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Hydrothermal synthesis of CoMoO_4/Co_(1-x)S hybrid on Ni foam for high-performance supercapacitors

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Journal of Energy Chemistry 2018年第2期27卷 478-485页

作者： Jinhua Ge Jihuai Wu leqing fan Quanlin Bao Jia Dong Jinbiao Jia Yaoqi Guo Jianming Lin Eng.Res.Center of Environment-Friendly Functional Materials Ministry of EducationInstitute of Materials Physical ChemistryHuaqiao University

Cobalt molybdate/non-stoichiometric cobalt sulfide（CoMoO4/Co1-xS） hybrid was in situ grown on nickel foam by a simple two-step hydrothermal process. The as-prepared CoMoO4/Co1-xS hybrid electrode possessed core-shell nanostructure, large surface area and high specific capacitance of 2250 F g-1 at a current density of 1 A g-1. Using the hybrid as anode and activated carbon（AC） as cathode, an asymmetric supercapacitor of CoMoO4/Co1-xS//AC was fabricated. The optimized supercapacitor had large potential window of 1.6 V and high capacitance of 112 F g-1, resulting in high power density of 804.5 W kg-1 and energy density of 39.8 Wh kg-1. Furthermore, the supercapacitor exhibited an excellent long cycle life along with 86.4% specific capacitance retained after 5000 cycles. The superior performances and good stability of the asymmetric supercapacitor can be attributed to the unique structure of the two components in hybrid, and the positive synergistic effects of the hybrid electrodes. The facile preparation process and excellent performance presented here render the CoMoO4/Co1-xS hybrid as a promising candidate for energy storage device.

关键词： Supercapacitors Electrode Hybrid Co1-xS CoMoO4

Efficiency improvement of flexible dye-sensitized solar cells by introducing mesoporous TiO_2 microsphere

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Science China Chemistry 2013年第10期56卷 1470-1477页

作者： fan leqing CHEN Yuan WU JiHuai LI ZhaoLei XIAO YaoMing HUANG MiaoLiang YU HaiJun Engineering Research Center of Environment-Friendly Functional Materials Ministry of Education Key Laboratory of Functional Materials for Fujian Higher Education Institute of Materials Physical Chemistry Huaqiao University

Mesoporous TiO2microsphere(MTM)was synthesized via a simple solution route and then mixed with commercial TiO2(P25)to form highly homogeneous and stable TiO2colloid by simple hydrothermal *** TiO2colloid was coated onto the plastic conductive substrate to prepare mesoporous TiO2film for flexible dye-sensitized solar cells(DSSCs)by low-temperature heat *** influence of MTM content on the physicochemical properties of the flexible TiO2film was characterized by scanning electron microscope,transmission electron microscopy,X-ray diffraction,energy-dispersive X-ray spectrometer,N2adsorption-desorption isotherms,UV–vis absorption and diffuse reflectance *** is revealed that with increasing the MTM content,the dye-loading capability of TiO2film and light-harvesting efficiency of flexible DSSCs are improved due to MTM having high surface area and acting as a light scattering center,respectively,resulting in the enhancement of photocurrent of flexible ***,more and larger cracks having negative effect on the performances of flexible DSSCs are formed *** the optimal condition with MTM content of 20%,a flexible DSSC with overall light-to-electric energy conversion efficiency of 2.74%is achieved under a simulated solar light irradiation of 100 mW cm 2(AM 1.5),with 26%improvement in comparison with DSSCs based on P25 alone.

关键词： mesoporous TiO2 microsphere dye-sensitized solar cell flexible mesoporous TiO2 film hydrothermal treatment

A dye-sensitized solar cell based on PEDOT:PSS counter electrode

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Chinese Science Bulletin 2013年第4期58卷 559-566页

作者： YUE GenTian WU JiHuai XIAO YaoMing LIN JianMing HUANG MiaoLiang fan leqing YAO Ying Engineering Research Center of Environment-Friendly Functional Materials Ministry of Education Institute of Materials Physical Chemistry Huaqiao University

A counter electrode for dye-sensitized solar cell (DSSC) was prepared by coating poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) with high transparency and adhesion on a conducting FTO glass at low temperature. The surface morphology, conductivity, sheet resistance, redox properties and photoelectric properties of the PEDOT:PSS/carbon electrodes were observed using scanning electron microscopy, a four-probe tester and a CHI660D electrochemical measurement system. The experimental results showed that DSSCs had the best photoelectric properties for PEDOT:PSS/carbon counter electrodes annealed at 80°C under vacuum conditions. The overall energy conversion efficiency of the DSSC with PEDOT:PSS/carbon counter electrode and barrier layer reached 7.61% under irradiation from a simulated solar light with intensity of 100 mW/cm2 (AM 1.5). The excellent photoelectric properties, simple preparation procedure and low cost allow the PEDOT:PSS/carbon electrode to be a credible alternative electrode for use in DSSCs.

关键词：染料敏化太阳能电池 PEDOT 碳电极 PSS 扫描电子显微镜乙撑二氧噻吩四探针测试仪光电性能

Quantum dot-sensitized solar cells employing Pt/C_(60) counter electrode provide an efficiency exceeding 2%

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Science China Chemistry 2013年第1期56卷 93-100页

作者： YUE GenTian WU JiHuai XIAO YaoMing LIN JianMing HUANG MiaoLiang fan leqing LAN Zhang Engineering Research Center of Environment-Friendly Functional Materials Ministry of Education Institute of Materials Physical Chemistry Huaqiao University

A microporous platinum/fullerenes (Pt/C 60) counter electrode was prepared by using a facile rapid thermal decomposition method,and the quantum-dot sensitized solar cell (QDSSC) of Pt/C 60-TiO 2-CdS-ZnS and Pt/C 60-TiO 2-CdTe-ZnS was *** technique forms a good contact between QDs and TiO 2 *** photovoltaic performances of the as-prepared cells were *** QDSSCs with Pt/C 60 counter electrode show high power conversion efficiency of 1.90% and 2.06%,respectively (under irradiation of a simulated solar light with an intensity of 100 mW cm 2),which is comparable to the one fabricated using conventional Pt electrode.

关键词： counter electrode quantum dot microporous platinum/fullerenes solar cell

Application of Poly(3,4-ethylenedioxythiophene):polystyrenesulfonate counter electrode in polymer heterojunction dye-sensitized solar cells

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Frontiers of Optoelectronics 2011年第4期4卷 369-377页

作者： Gentian YUE Jihuai WU Jianming LIN Miaoliang HUANG Ying YAO leqing fan Yaoming XIAO Engineering Research Center of Environment-Friendly Functional Materials Ministry of Education The Key Laboratory for Functional Materials of Fujian Higher Education Institute of Material Physical Chemistry Huaqiao University

A Poly（3, 4-ethylenedioxythiophene）: polystyrenesulfonate（PEDOT:PSS）/carbon conductive paste was prepared and coated on a conducting FTO glass to construct counter electrode for polymer heterojunction dye-sensitized solar cells（DSSCs）. The surface morphology, conductivity, sheet resistance, redox properties and photoelectric properties of carbon electrode were observed respectively by scanning electron microscopy, four-probe tester and CHI660D electrochemical measurement *** experimental results showed that DSSCs had the best photoelectric properties for PEDOT:PSS/carbon counter electrode annealing at 80°C in vacuum conditions. Using[6, 6]-phenyl-C61-butyric acid methyl ester（PCBM）/poly（3-hexylthiophene）(P3HT) heterojunction to replace I3–/I–redox electrolyte, the overall energy conversion efficiency of the DSSCs with barrier layer reached 4.11%under irradiation of a simulated solar light with a intensity of 100 m W·cm–1（AM 1.5）, which is higher 20% than that of the DSSCs with Pt counter electrode（3.42%）. The excellent photoelectric properties, simple preparation procedure and low cost allow the PEDOT:PSS/carbon electrode to be a credible alternative used in DSSCs.

关键词： Poly (3 4-ethylenedioxythiophene): polystyrenesulfonate (PEDOT:PSS) counter electrode polymer heterojunction dye-sensitized solar cell (DSSC) photoelectric properties

Electrodeposited NiSe2 on carbon fiber cloth as a flexible electrode for high-performance supercapacitors

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Journal of Energy Chemistry 2017年第6期26卷 1252-1259页

作者： Quanlin Bao Jihuai Wu leqing fan Jinhua Ge Jia Dong Jinbiao Jia Jiali Zeng Jianming Lin Engineering Research Center of Environment-Friendly Functional Materials Ministry of EducationInstitute of Materials Physical ChemistryHuaqiao UniversityXiamen 361021FujianChina

A flexible electrode of nickel diselenide/carbon fiber cloth(NiSe/CFC) is fabricated at room temperature by a simple and efficient electrodeposition method. Owing to NiSecharacter of nanostructure and high conductivity, the as-synthesized electrodes possess perfect pseudocapacitive property with high specific capacitance and excellent rate capability. In three-electrode system, the electrode specific capacitance of the NiSe/CFC electrode varies from 1058 F gto 996.3 F gat 2 A gto 10 A grespectively, which shows great rate capability. Moreover, the NiSeelectrode is assembled with an active carbon(AC) electrode to form an asymmetric supercapacitor with an extended potential window of 1.6 V. The asymmetric supercapacitor possesses an excellent energy density 32.7 Wh kgwith a power density 800 W kgat the current density of 1 A g. The nanosheet array on carbon fiber cloth with high flexibility, specific capacitance and rate capacitance render the NiSeto be regarded as the promising material for the high performance superconductor.

关键词： Electrodeposition Carbon fiber cloth Flexible NiSe_2 Supercapacitor

Application of a novel redox-active electrolyte in MnO_2-based supercapacitors

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Science China Chemistry 2012年第7期55卷 1319-1324页

作者： YU HaiJun WU JiHuai fan leqing LIN YouZhen CHEN ShuHong CHEN Yuan WANG JiangLi HUANG MiaoLiang LIN JianMing LAN Zhang HUANG Yunfang Engineering Research Center of Environment-Friendly Functional Materials Ministry of EducationInstitute of Materials Physical ChemistryHuaqiao UniversityQuanzhou 362021China

This paper reports a novel strategy for preparing redox-active electrolyte through introducing a redox-mediator(p-phenylenediamine,PPD) into KOH electrolyte for the application of ball-milled MnO 2-based *** morphology and compositions of ball-milled MnO 2 were characterized using scanning electron microscopy(SEM) and X-ray diffraction(XRD).The electrochemical properties of the supercapacitor were evaluated by cyclic voltammetry(CV),galvanostatic charge-discharge(GCD),and electrochemical impedance spectroscopy(EIS) *** introduction of p-phenylenediamine significantly improves the performance of the *** electrode specific capacitance of the supercapacitor is 325.24 F g-1,increased by 6.25 folds compared with that of the unmodified system(44.87 F g-1) at the same current density,and the energy density has nearly a 10-fold increase,reaching 10.12 Wh *** addition,the supercapacitor exhibits good cycle-life stability.

关键词： supercapacitor redox-active electrolyte manganese dioxide p-phenylenediamine pseudocapacitance

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Low temperature fabrication of high performance and transparent Pt counter electrodes for use in flexible dye-sensitized solar cells

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Chinese Science Bulletin 2012年第18期57卷 2329-2334页

作者： XIAO YaoMing,WU JiHuai,CHENG CunXi,CHEN Yuan,YUE GenTian,LIN JianMing,HUANG MiaoLiang,fan leqing & LAN Zhang Engineering Research Center of Environment-Friendly Functional Materials,Ministry of Education,Institute of Materials Physical Chemistry,Huaqiao University,Quanzhou 362021,China Engineering Research Center of Environment-Friendly Functional Materials Ministry of Education Institute of Materials Physical Chemistry Huaqiao University

High performance Pt counter electrode is prepared by using vacuum thermal decomposition at a relatively low (120℃) temperature on a flexible polyethylene naphthalate substrate coated with indium-doped tin oxide for use in flexible dye-sensitized solar *** obtained Pt counter electrode shows a good chemical stability,high light transmittance,and high electrocatalytic activity for the I3-/I-redox *** energy conversion efficiency of a flexible dye-sensitized solar cell based on the prepared Pt counter electrode and a TiO 2 /Ti photoanode reaches 5.14% under a simulated solar light irradiation with intensity of 100 mW cm-2.

关键词：染料敏化太阳能电池铂电极热分解柔性循环伏安对电极性能真空

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染料敏化太阳电池中电子传输性能

太阳能学报 2005年第1期26卷 34-38页

作者：范乐庆吴季怀黄昀昉林建明华侨大学材料科学与工程学院泉州362011

通过检测染料敏化TiO_2纳米晶太阳电池中TiO_2膜厚度和入射光的强度对电池光电转换性能的影响来研究电池中电子的传输性能。结果表明:TiO_2膜厚度和入射光强度对电池性能有很大的影响。当TiO_2膜厚度增大时,电池的短路电流(I_(sc))加大... 详细信息

通过检测染料敏化TiO_2纳米晶太阳电池中TiO_2膜厚度和入射光的强度对电池光电转换性能的影响来研究电池中电子的传输性能。结果表明:TiO_2膜厚度和入射光强度对电池性能有很大的影响。当TiO_2膜厚度增大时,电池的短路电流(I_(sc))加大,而填充因子(ff)下降,开路电压(V_(oc))先上升后下降,电池的单色光光电转化效率(IPCE)增大;当光强度加大时,电池的短路电流和开路电压均增加,但是电池的填充因子降低。并用UV-Vis 等手段表征了染料RuL_2(SCN)_2。

关键词： TiO2膜厚度光强度太阳电池单色光光电转化效率