The Experts below are selected from a list of 75780 Experts worldwide ranked by ideXlab platform
Du Jun - One of the best experts on this subject based on the ideXlab platform.
-
Preparation and characterization of solid state thin film LiSiPON electrolyte
Chinese Journal of Power Sources, 2006Co-Authors: Du JunAbstract:Nitrogen-incorporated lithium silicophosphate (LiSiPON) solid state thin film electrolytes, which are amorphous, were fabricated by RF magnetron sputtering from a 0.5 Li3PO4-0.5 Li2SiO3 target in nitrogen reactive plasma. The incorporation of N and Si increases the ionic conductivity of Li2O-P2O5 systems and the ionic conductivity of LiSiPON thin film electrolyte is 4.83×10-6 S/cm at room temperature. The Decomposition Potential of LiSiPON thin film in contact with Pt is about 5.7 V and it is a promising electrolyte for all- solid-state thin film lithium ion batteries.
Mechthild Roth - One of the best experts on this subject based on the ideXlab platform.
-
Changes in the decomposer community when converting spruce monocultures to mixed spruce/beech stands
Plant and Soil, 2004Co-Authors: Michael Elmer, Gisela Förster, Mechthild RothAbstract:The impact of the admixture of beech in spruce monocultures on structure and function of the decomposer community was studies in the Ore mountains (Saxony, Germany) on Dystric Cambisols between 2000 and 2002. The study sites represented four stages of forest conversion from a mature spruce stand to a mature spruce/beech stand. There, the functional profile of the nematodes, enchytraeids, lumbricids, and dipterans was analysed on the basis of ecological guilds, and their metabolic equivalences were calculated to characterize the Decomposition Potential of the invertebrate decomposer community. Because of the acidic parent soil the coenoses at all study sites were dominated by the enchytraeids with increasing importance of lumbricids and dipterans in progress of forest conversion. Gradual changes with rising coverage of beech culminated in intense differences of entire biomasses and metabolic equivalences between the mature stands, indicating a higher Decomposition Potential of the invertebrate decomposer community by the admixture of beeches in spruce forests. The quality of the beech litter is likely to be the important factors for these changes. To prove this assumption further investigations of the saprovore food chain are necessary, taking microbial parameters into account.
-
changes in the decomposer community when converting spruce monocultures to mixed spruce beech stands
Plant and Soil, 2004Co-Authors: Michael Elmer, Gisela Förster, Mechthild RothAbstract:The impact of the admixture of beech in spruce monocultures on structure and function of the decomposer community was studies in the Ore mountains (Saxony, Germany) on Dystric Cambisols between 2000 and 2002. The study sites represented four stages of forest conversion from a mature spruce stand to a mature spruce/beech stand. There, the functional profile of the nematodes, enchytraeids, lumbricids, and dipterans was analysed on the basis of ecological guilds, and their metabolic equivalences were calculated to characterize the Decomposition Potential of the invertebrate decomposer community. Because of the acidic parent soil the coenoses at all study sites were dominated by the enchytraeids with increasing importance of lumbricids and dipterans in progress of forest conversion. Gradual changes with rising coverage of beech culminated in intense differences of entire biomasses and metabolic equivalences between the mature stands, indicating a higher Decomposition Potential of the invertebrate decomposer community by the admixture of beeches in spruce forests. The quality of the beech litter is likely to be the important factors for these changes. To prove this assumption further investigations of the saprovore food chain are necessary, taking microbial parameters into account.
K. Radhakrishnan - One of the best experts on this subject based on the ideXlab platform.
-
Preparation and characterization of rf-sputtered thin films of Li2O-P2O5-Nb2O5 glasses
Solid State Ionics, 1991Co-Authors: B. V. R. Chowdari, K. RadhakrishnanAbstract:Abstract Lithium ion conducting thin films of various compositions have been prepared using rf-sputtering technique in the Li 2 O:P 2 O 5 :Nb 5 O 5 glassy system. Ionic conductivity values of the order of σ =1.5×10 −5 ω − cm − at 100°C have been measured for the composition 67.5Li 2 O:28.3P 2 O 5 :4.2Nb 2 O 5 . Electrochemical measurements have be performed to determine the electronic conductivity and the Decomposition Potential of the films. Results are discussed and compared with the bulk composition.
Sung-man Lee - One of the best experts on this subject based on the ideXlab platform.
-
Electrical conductivity in Li–Si–P–O–N oxynitride thin-films
Journal of Power Sources, 2003Co-Authors: Seung-joo Lee, Jun Hyun Bae, Hee Won Lee, Hong Koo Baik, Sung-man LeeAbstract:Abstract Nitrogen-incorporated lithium silicophosphate (LiSiPON) thin-film electrolytes, which contain two glass-forming elements, are fabricated by sputtering from a (1− x )Li 3 PO 4 · x Li 2 SiO 3 target in a nitrogen reactive plasma. The results of impedance measurements show that the activation energy for conduction decreases as the Si content increases, which leads to an increase in the ionic conductivity of the films. It is suggested that these improvements in the electrical properties of the films are due to the combined effect of the mixed former and nitrogen incorporation. It appears that the Decomposition Potential of the electrolyte film in contact with Pt is about 5.5 V.
Serguei N Lvov - One of the best experts on this subject based on the ideXlab platform.
-
cucl electrolysis for hydrogen production in the cu cl thermochemical cycle
Journal of The Electrochemical Society, 2011Co-Authors: Victor N. Balashov, Rich S. Schatz, Elena Chalkova, Nikolay N. Akinfiev, Mark Valentinovich Fedkin, Serguei N LvovAbstract:The Cu―Cl thermochemical cycle is among the most attractive technologies proposed for hydrogen production due to moderate temperature requirements and high efficiency. In this study, the key step of the cycle, H 2 gas evolution via oxidation of CuCl(s) dissolved in high concentrated HCl(aq), was experimentally investigated. The electrolysis parameters and system performance were studied by linear sweep voltammetry and electrochemical impedance spectroscopy at ambient temperature. Promising performance of the electrolyzer was obtained when pure water was used as catholyte. A thermodynamic model previously developed for speciation of the CuCl―CuCl 2 ―HCl aqueous solutions was used to speculate on the effects of reagent concentration, flow rate, and temperature on electrolysis kinetics. The experimental Decomposition Potential necessary to initiate the hydrogen evolution reaction was more than 3 times lower than the Potential necessary for water electrolysis at the same conditions. Close correspondence of the hydrogen production rate to Faraday's law of electrolysis indicated the current efficiency of about 98%, while the voltage efficiency was estimated at 80% at 0.5 V and 0.1 A/cm 2 .
