The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
Fuqiang Huang - One of the best experts on this subject based on the ideXlab platform.
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oriented single crystalline Nickel Sulfide nanorod arrays two in one counter electrodes for dye sensitized solar cells
Journal of Materials Chemistry, 2013Co-Authors: Wei Zhao, Hui Bi, Ping Chen, Fuqiang HuangAbstract:An oriented millerite Nickel Sulfide (NiS) nanorod array was successfully grown on bare glass substrate. Metallic conductivity and outstanding electrocatalytic activity make it possible to function as a new type of “two-in-one” counter electrode (CE) in dye-sensitized solar cells (DSCs) to replace both the transparent conductive oxide (TCO) and Pt electrocatalyst. When applied in DSCs, an impressive power conversion efficiency of 7.41% was achieved, comparable to that of TCO supported Pt CE (7.55%). The NiS nanoarray film could be a potential candidate to realize a “two-in-one” CE in DSCs, which is highly desirable to reduce the fabrication cost of DSCs while retaining a comparable conversion efficiency.
Wei Zhao - One of the best experts on this subject based on the ideXlab platform.
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oriented single crystalline Nickel Sulfide nanorod arrays two in one counter electrodes for dye sensitized solar cells
Journal of Materials Chemistry, 2013Co-Authors: Wei Zhao, Hui Bi, Ping Chen, Fuqiang HuangAbstract:An oriented millerite Nickel Sulfide (NiS) nanorod array was successfully grown on bare glass substrate. Metallic conductivity and outstanding electrocatalytic activity make it possible to function as a new type of “two-in-one” counter electrode (CE) in dye-sensitized solar cells (DSCs) to replace both the transparent conductive oxide (TCO) and Pt electrocatalyst. When applied in DSCs, an impressive power conversion efficiency of 7.41% was achieved, comparable to that of TCO supported Pt CE (7.55%). The NiS nanoarray film could be a potential candidate to realize a “two-in-one” CE in DSCs, which is highly desirable to reduce the fabrication cost of DSCs while retaining a comparable conversion efficiency.
Jiazhao Wang - One of the best experts on this subject based on the ideXlab platform.
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The Electrochemical Properties of Nickel Sulfide Electrode by for Na Batteries
2010Co-Authors: Jin Woo Park, Jiazhao WangAbstract:Introduction As metal Sulfides have high theoretical capacity and good cycle life, many researchers have considered them for cathode materials in lithium batteries [1–8]. Jasinski et al. [3] first reported that Nickel Sulfide could be used as a cathode material for lithium rechargeable batteries. This was because it had an energy density in the range of 388–685 W h lb and various Sulfides exist in the forms of Ni3S2, Ni6S5, Ni7S6, NiS, Ni3S4, and NiS2. In this study, we investigated the electrochemical properties of Na/Nickel Sulfide batteries at room temperature.
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Nickel Sulfide cathode in combination with an ionic liquid based electrolyte for rechargeable lithium batteries
Solid State Ionics, 2008Co-Authors: Jiazhao Wang, Shulei Chou, Sau Yen Chew, Maria Forsyth, Douglas R MacfarlaneAbstract:Abstract Nickel Sulfides, pure Ni3S2 and a mixture of Ni7S6–NiS, were synthesized through a solvothermal process. The Nickel Sulfide powders were characterized by X-ray diffraction, scanning electron microscopy, and electrochemical testing. The results showed that the capacity of NiS–Ni7S6 is much higher than that of Ni3S2, when used as the cathode in a lithium cell with an organic solvent-based electrolyte, l M lithium bis(trifluoromethanesulfonyl)amide (LiNTf2) in poly(ethylene glycol) dimethyl ether 500. The NiS–Ni7S6 electrodes were also tested with an ionic liquid electrolyte consisting of 1 M LiNTf2 in N-methyl-N-propyl pyrrolidinium bis(trifluoromethanesulfonyl)amide ([C3mpyr][NTf2]) to compare with organic-solvent based electrolytes. The results revealed that the ionic liquid is a useful solvent for use with this cathode material.
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nanostructured Nickel Sulfide synthesized via a polyol route as a cathode material for the rechargeable lithium battery
Electrochemistry Communications, 2007Co-Authors: Jiazhao Wang, Sau Yen Chew, David Wexler, Guoxiu Wang, S H Ng, Shi ZhongAbstract:Abstract Nanostructured Nickel Sulfide (NiS) was synthesized via a simple polyol route. The NiS powders were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and electrochemical testing. The results revealed that the cycle life of the annealed NiS sample was improved over that of the as-prepared sample. The electrochemical performance was also tested using 1 M lithium trifluoromethanesulfonimide (LiTFSI) in a solvent of poly(ethylene glycol) dimethyl ether (PEGDME) in order to compare with a sample tested in the conventional electrolyte of 1 M LiPF6 in a mixture of ethylene carbonate (EC) and dimethyl carbonate (DMC). The results showed that the electrochemical properties were improved by using the 1 M LiTFSI/PEGDME electrolyte.
Myeongsoo Jeong - One of the best experts on this subject based on the ideXlab platform.
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improved performance of quantum dot sensitized solar cells adopting a highly efficient cobalt Sulfide Nickel Sulfide composite thin film counter electrode
Journal of Power Sources, 2014Co-Authors: Chandu V V M Gopi, Myeongsoo JeongAbstract:Abstract Cobalt Sulfide (CoS), Nickel Sulfide (NiS), and cobalt Sulfide/Nickel Sulfide (CoS/NiS) were deposited onto fluorine-doped tin oxide (FTO) substrate using a facile chemical bath deposition method and utilized as counter electrodes (CEs) for polySulfide redox reactions in CdS/CdSe quantum dot-sensitized solar cells (QDSSCs). The thickness of 750 nm and 695 nm are optimized for NiS and CoS electrodes to prepare the CoS/NiS CE. Compared to a platinum (Pt) electrode, the CoS, NiS, and composite CoS/NiS electrodes provide higher electrocatalytic activity and lower charge-transfer resistance. The combination of a QDSSC with composite CoS/NiS CE shows an improved power conversion efficiency of 3.40% under the illumination of one sun (100 mW cm −2 ), which is higher than the CoS (2.53%), NiS (2.61%), and Pt (1.47%) CEs. This enhancement is mainly attributed to the NiS nanoparticles deposited on CoS film, due to which the composite structure exhibits a lower charge transfer resistance (7.61 Ω) at the interface of the CE and the electrolyte, along with superior electrochemical catalytic ability. This is well supported by the cyclic voltammetry, electrochemical impedance spectroscopy, and Tafel polarization measurements.
Zhaosheng Li - One of the best experts on this subject based on the ideXlab platform.
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high catalytic activity and stability of Nickel Sulfide and cobalt Sulfide hierarchical nanospheres on the counter electrodes for dye sensitized solar cells
Chemical Communications, 2014Co-Authors: Jie Yang, Tao Yu, Faming Li, Zhaosheng LiAbstract:In situ grown Nickel Sulfide and cobalt Sulfide hierarchical nanospheres on F-doped SnO2 (FTO) substrates exhibited comparable catalytic activities to sputtering Pt on the counter electrodes for dye-sensitized solar cells (DSSCs). The fresh cells with the Nickel Sulfide and cobalt Sulfide on the counter electrodes could reach power conversion efficiencies of 6.81% and 6.59% respectively, approaching an efficiency of 6.85% based on the sputtering Pt counter electrode. Both Nickel Sulfide and cobalt Sulfide counter electrodes could maintain the cell's relatively high performance in the long-term stability test in 504 hours.