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  • 1
    Electronic Resource
    Electronic Resource
    Intercalation reaction kinetics: a TDPAC study of 2H-TaS2 intercalation (1983)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 2 (1983), S. 1971-1976 
    Details
    ISSN: 0392-6737
    Keywords: Chemical kinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Si riportano le osservazioniin situ dell'interazione quadrupolare nucleare di181Ta durante l'elettrointercalazione di 2H-TaS2 con ioni di gadolinio idratati per mezzo di correlazioni angolari differenziali perturbate nel tempo (TDPAC).
    Abstract: Резюме Мы сообщаем о наблюдении181Ta ядерного квадрупольного взаимодействия во время электровключения 2H-TaS2 с гидратированными ионами гадолиния с помощью временных дифференциальных возмущенных угловых корреляций.
    Notes: Summary We report on thein situ observation of the181Ta nuclear quadrupole interaction during electrointercalation of 2H-TaS2 with hydrated gadolinium ions by means of time differential perturbed angular correlations (TDPAC).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02457896
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  • 2
    Electronic Resource
    Electronic Resource
    Electrointercalation into 2H-TaS2 single crystals:in situ dilatometry and superconducting properties (1983)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 2 (1983), S. 1706-1711 
    Details
    ISSN: 0392-6737
    Keywords: Superconducting materials
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Si è studiata l'elettrointercalazione dei seguenti ioni metallici idrati in cristalli 2H-TaS2: Na+, K+, Ca2+, Zn2+, Mn2+, La3+, Gd3+, Pr3+. Si trattano studi dilatometriciin situ della reazione e le proprietà superconduttrici di questi composti.
    Abstract: Резюме Иссиедуется злектропрослойка следуюших металлических ионов (Na+, K+, Ca2+, Zn2+, Mn2+, Co3+, Gd3+, Pr3) в монокристаллах 2H-TaS2. Приводятся резулътаты дилатометрических исследований и сверхироводящие свойства зтих соединений.
    Notes: Summary The electrointercalation of the following hydrated metal ions into 2H-TaS2 crystals was investigated: Na+, K+, Ca2+, Zn2+, Mn2+, Co2+, La3+, Gd3+, Pr3+. We report onin situ dilatometric studies of the reaction and on superconducting properties of these compounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02457854
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  • 3
    Electronic Resource
    Electronic Resource
    Chemical modification of carbon fibres by esterification —optimization of fibre pretreatment (1989)
    Springer
    Journal of applied electrochemistry 19 (1989), S. 341-344 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Electrochemically oxidized PAN-based carbon fibres were modified by attachment of anm-dinitrobenzene group. Chemical modification was performed by esterification of the −OH groups of the oxidized carbon surface with 3,5-dinitrobenzoyl chloride. The higher modification extent was achieved in the case of d.c. oxidized carbon fibres, which bear a large number of −OH groups. The attachment of the dinitrobenzene species was supported by cyclic voltammetry carried out on the modified carbon fibre electrodes in aqueous solutions. The quantity of attachedm-dinitrobenzene groups was determined polarographically, after hydrolysis of the esteric bonds; it corresponds to a charge density of ca 0.2 kAh kg−1 carbon fibres, which is of the order of magnitude of battery electrodes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01015233
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  • 4
    Electronic Resource
    Electronic Resource
    Carbon fibre based conductive ion exchangers as support for metal and ligand charged metalloporphyrin electrocatalysts (1992)
    Springer
    Journal of applied electrochemistry 22 (1992), S. 733-737 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The behaviour of a new kind of metalloporphyrin catalyst electrode for reduction of oxygen, characterized by a metal and ligand charged (MLC) water soluble metalloporphyrin system and a surface oxidized carbon fibre substrate exhibiting cation exchanger properties, is investigated by cyclic voltammetry and by impedance spectroscopy. Results with Fe- and Co-MLC-metalloporphyrins clearly indicate that they are electrocatalytically active so long as the transition metals exist in their +3 oxidation state. Compared to conventional metalloporphyrin electrodes, which are obtained after adsorption procedures, this new kind of electrode has several advantages, i.e. it bears larger quantity of catalytically active monomeric metalloporphyrin molecules it is more resistant to rinsing and can be reactivated by addition of the metalloporphyrin to the aqueous electrolyte solution. These advantages allow the application of this electrode in fuel cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01027502
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  • 5
    Electronic Resource
    Electronic Resource
    Electrochemical oxidation of carbon fibres in aqueous solutions and analysis of the surface oxides (1990)
    Springer
    Journal of applied electrochemistry 20 (1990), S. 619-624 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Carbon fibres with notably different surface oxides can be prepared by varying the electrochemical oxidation conditions. Through correlation of voltammetric analysis and mass spectroscopy, interpretation of the reduction peaks of the surface oxides on the basis of their potential and width is possible. Narrow voltammetric reduction peaks at strongly negative potential are indicative of the predominance of −COOH type groups, while wide peaks at more positive potential are indicative of the presence of an excess of type groups. A quantitative determination of the surface acidic groups (−COOH and ) is achieved by combination of Ag+ ion exchange and esterification of groups with 3,5-dinitrobenzoyl chloride. All results are confirmed by the independent method of −COOH group determination via their electrocatalytic behaviour in the reduction of azobenzene in methanol. The amounts of the −COOH and groups formed depend notably on the conditions of the electrochemical oxidation of the carbon fibres. The ratio between −COOH and groups coincides in all cases with that obtained by the mass spectrosopic data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01008872
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  • 6
    Electronic Resource
    Electronic Resource
    Solid state batteries: Materials design and optimization. By Christian Julien, Gholam-Abbas Nazri, Kluwer Academic, Dordrecht, The Netherlands 1994, XI, 629 pp., hardcover, $175.00, ISBN 0-792-39460-7 (1996)
    Weinheim : Wiley-Blackwell
    Advanced Materials 8 (1996), S. 187-187 
    Details
    ISSN: 0935-9648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/adma.19960080225
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  • 7
    Electronic Resource
    Electronic Resource
    In situ studies of solid state reactions by perturbed angular correlation (1983)
    Springer
    Hyperfine interactions 16 (1983), S. 925-932 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We report on three examples of in situ studies of solid state reactions by time differential perturbed angular correlation of181Ta: (i) the oxidation of hafnium metal and the doping of ZrS2 with Hf during iodine vapour transport crystal growth; (ii) the observation of sublattice melting during polymorphic phase transitions in TaS2; (iii) the electrointercalation of 2H-TaS2 with silver.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02147395
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  • 8
    Electronic Resource
    Electronic Resource
    Negative electrodes in rechargeable lithium ion batteries — Influence of graphite surface modification on the formation of the solid electrolyte interphase (2000)
    Springer
    Ionics 6 (2000), S. 172-179 
    Details
    ISSN: 1862-0760
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Rechargeable lithium ion cells operate at voltages of ∼4.5 V, which is far beyond the thermodynamic stability window of the battery electrolyte. Strong electrolyte reduction and corrosion of the negative electrode has to be anticipated, which leads to irreversible loss of electroactive material and electrolyte, and thus strongly deteriorates cell performance. To minimize these reactions, negative electrode and electrolyte components have to be combined bringing about the electrolyte reduction products to form an effectively protecting film at the anode/electrolyte interface. This film hinders further electrolyte decomposition reactions and acts as membrane for the lithium cations, i.e., behaves as asolidelectrolytei2nt erphase (SEI). The present paper gives a review of our recent work in the field of negative electrodes in lithium ion batteries. The effects of the graphite anode surface and graphite anode surface modification on the formation of the SEI are discussed in detail by using the example: modification with carbon dioxide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02374063
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  • 9
    Electronic Resource
    Electronic Resource
    Wiederaufladbare LithiumbatterienVortrag von J. O. BESENHARD auf dem 33. Tutzing-Symposion der DECHEMA e. V., 13./16. März 1995 in Bad Tutzing. (1995)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 67 (1995), S. 1312-1316 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330671009
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  • 10
    Electronic Resource
    Electronic Resource
    Über die Reversibilität der elektrochemischen Graphitoxydation in SäurenProfessor Helmut Behrens zum 60. Geburtstage am 30. Mai 1975 gewidmet (1975)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 416 (1975), S. 106-116 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Reversibility of the Electrochemical Oxidation of Graphite in AcidsThe oxidation of graphite foil in acids stable to oxidation with varying H2O content is investigated by cyclic voltammetry and by following the potential curves of graphite electrodes during quantitative galvanostatic electrolyses.It is shown, that e. g. in 70% HClO4 a graphite oxide is formed with almost 100% current yield, the degree of oxidation of which is essentially lower then for chemically oxidized products. The reaction can be reversed with very good current and material yield and be repeated; the reversibility with reference to the balance of energy decreases with increasing H2O-content of the acid.
    Notes: Die Oxydation von Graphitfolie in oxydationsstabilen Säuren mit unterschiedlichem H2O-Gehalt wird mit der potentiostatischen Dreieckspannungsmethode sowie anhand des Potentialverlaufs von Graphitelektroden während quantitativer galvanostatischer Elektrolysen verfolgt.Es wird gezeigt, daß z. B. in 70%ig. HClO4 mit fast 100% Stromausbeute ein Graphitoxid gebildet wird, dessen Oxydationsgrad jedoch erheblich tiefer als für chemisch oxydierte Produkte liegt. Die Reaktion kann mit sehr guter Strom- und Materialausbeute umgekehrt und mehrfach wiederholt werden; ihre Reversibilität bezüglich der Energiebilanz wird mit zunehmendem H2O-Gehalt der Säure geringer.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19754160203
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