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2.006 Aktuelle Fachpublikationen zum Thema temperature

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A new room temperature and solvent free carbon coating procedure for battery electrode materials

17.09.2013 | Alexandre Ponrouch; Alejandro R Goni; Moulay Tahar Sougrati; Mohamed Ati; Jean-Marie Tarascon; Jessica Nava-Avendaño ..., Energy & Environmental Science, 2013

Carbon coating on battery electrode active material powders is a common practice in order to improve their electronic conductivity and the battery calendar life by limiting side reactions (i.e. active material surface degradation and electrolyte decomposition). Such coating is currently achieved ...

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Trapping of Metal Atoms on Nanoprotrusions of Carbon Nanotubes

13.09.2013 | Lidong Shao, Wei Zhang, Luise Theil Kuhn, Advanced Engineering Materials, 2013

Nanoprotrusions on CNTs are engineered using conventional lab treatments at a low temperature. The experimental set‐up of applying a mild acid treatment with sonication and base washing is based on the development of introduced defects and vacancies. Compared with previous reports realizing ...

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Oils and Phenols-and-Water-Free Tars Produced in Pyrolysis of 23 Chinese Coals in Consecutive Temperature Ranges

13.09.2013 | Lei Shi; Qingya Liu; Zhenyu Liu; Weize Wu, Energy & Fuels, 2013

Coal pyrolysis has been widely studied, and the overall tar yield has been reported frequently in the literatures. It is recognized that the yield and composition of the tar vary with the coal rank and pyrolysis temperature, but detailed information is limited, especially for the oil fraction ...

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Facile Rearrangement of 3-Oxoalkyl Radicals is Evident in Low-Temperature Gas-Phase Oxidation of Ketones

13.09.2013 | Adam M. Scheer; Oliver Welz; Darryl Y. Sasaki; David L. Osborn; Craig A. Taatjes, Journal of the American Chemical Society, 2013

The pulsed photolytic chlorine-initiated oxidation of methyl-tert-butyl ketone (MTbuK), di-tert-butyl ketone (DTbuK), and a series of partially deuterated diethyl ketones (DEK) is studied in the gas phase at 8 Torr and 550–650 K. Products are monitored as a function of reaction time, mass, and ...

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Thermal response characteristics of fire blanket materials

12.09.2013 | Fumiaki Takahashi, Amber Abbott, Timothy M. Murray, James S. T'ien, Sandra L. Olson, Fire and Materials, 2013

SUMMARY The thermal response characteristics of over 50 relatively thin (0.15–3.7 mm) fire blanket materials from four different fiber groups (aramid, fiberglass, amorphous silica, and pre‐oxidized carbon) and their composites have been investigated. A plain or coated fabric sample was ...

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Temperature-dependent enhancement of oxygen reduction reaction activity for interconnected nitrogen-doped carbon shells

11.09.2013 | Na Li; Minhua Cao; Ling Ren; Changwen Hu, CrystEngComm, 2013

Interconnected carbon shells with a high nitrogen-doped level were successfully synthesized by a green self-assembly route. The synthesized carbon shells exhibited considerably enhanced oxygen reduction activities compared to those of the commercial Pt/C catalysts (20% Pt) and Pt-doped carbon ...

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Coherent Longitudinal Acoustic Phonons in Three-Dimensional Supracrystals of Cobalt Nanocrystals

11.09.2013 | Isabelle Lisiecki; Dario Polli; Cong Yan; Giancarlo Soavi; Eugène Duval; Giulio Cerullo; Marie-Paule Pileni, Nano Letters, 2013

We use broadband picosecond acoustics to detect longitudinal acoustic phonons with few-gigahertz frequency in three-dimensional supracrystals (with face-centered cubic lattice) of 7 nm cobalt nanocrystal spheres. In full analogy with atomic crystals, where longitudinal acoustic phonons propagate ...

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Economic analysis for the transport and storage of captured carbon dioxide in South Korea

10.09.2013 | Umer Zahid, Ung Lee, Jinjoo An, Youngsub Lim, Chonghun Han, Environmental Progress, 2013

The continuous rise of CO2 emissions is a major cause of global climate change. Carbon capture and storage (CCS) is widely seen as a practical technology for reducing CO2 emissions. CCS mainly consists of capturing CO2 from large emitting sources and its transportation to a sequestration site ...

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Temperature stability of high-resistivity GaN buffer layers grown by metalorganic chemical vapor deposition

10.09.2013 | Alexander Y. Polyakov, N. B. Smirnov, E. A. Kozhukhova, Andrei V. Osinsky, and Stephen J. Pearton, Journal of Vacuum Science & Technology B, 2013

Nominally undoped GaN films were grown by metalorganic chemical vapor deposition under three different conditions, namely (1) “standard” growth conditions with growth temperature of 1000 °C and growth rate of 1 μm/h, (2) slightly reduced growth temperature of 975 °C, and (3) standard temperature, ...

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Electrochemical Hydrogen Insertion in Substoichiometric Titanium Carbide TiC0.6: Influence of Carbon Vacancy Ordering

10.09.2013 | Julien Nguyen; Nicolas Glandut; Cédric Jaoul; Pierre Lefort, Langmuir, 2013

Substoichiometric titanium carbide of formula TiC0.6 with different degrees of carbon vacancy ordering has been synthesized first by reactive sintering at high temperature (2100 °C) and then by annealing at low temperature (730 °C) for different durations. The effect of annealing on the structure ...

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