المؤلفون: Kuriganova, A. B., Leontyeva, D. V., Ivanov, S., Bund, A., Smirnova, N. V.

المصدر: Journal of Applied Electrochemistry. December 2016 46(12):1245-1260

المؤلفون: Zhu, Jiangong, Sun, Zechang, Wei, Xuezhe, Dai, Haifeng

المصدر: Journal of Applied Electrochemistry. February 2016 46(2):157-167

المؤلفون: Rojo, Adrian, Hansen, Henrik K., del Campo, Jorge

المصدر: Journal of Applied Electrochemistry. June 2010 40(6):1095-1100

المؤلفون: Bi, Ran, Schlaak, Michael, Siefert, Eike, Lord, Richard, Connolly, Helen

المصدر: Journal of Applied Electrochemistry. June 2010 40(6):1217-1223

المؤلفون: Ueno, Hirohito, Nemoto, Junichi, Ohnuki, Keita, Horikawa, Mizuki, Hoshino, Mikio, Kaneko, Masao

المصدر: Journal of Applied Electrochemistry. October 2009 39(10):1897-1905

المؤلفون: Bouzek, K., Flower, L., Roušar, I., Wragg, A. A.

المصدر: Journal of Applied Electrochemistry. May 1999 29(5):569-576

المؤلفون: D'alba, F., Lorenzo, S. Di, Lucarini, C.

المصدر: Journal of Applied Electrochemistry. July 1998 28(7):711-716

المؤلفون: Haifeng Dai, Zechang Sun, Jiangong Zhu, Xuezhe Wei

المصدر: Journal of Applied Electrochemistry. 46:157-167

مصطلحات موضوعية: Chemistry, General Chemical Engineering, 02 engineering and technology, Mechanics, Internal resistance, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Characteristic impedance, 0104 chemical sciences, law.invention, Nuclear magnetic resonance, Amplitude, law, Materials Chemistry, Electrochemistry, Wave impedance, Output impedance, Voltage source, 0210 nano-technology, Alternating current, Electrical impedance

الوصف: An impedance measurement approach with various current amplitudes is proposed to investigate the impedance behavior of power Lithium-ion battery in the frequency domain. Notably, the impedance arc is divided into amplitude-independent response in the high-frequency range and amplitude-dependent response in medium-frequency range. A shrinking of semi-circle diameter of the impedance arc at medium-frequency part of measured spectrum is distinctly observed with rising current amplitude. Thus, a series of particular experiments are performed to facilitate the interpretation of the phenomenon. The possible influencing factors for the battery, including its state of charge, internal pressure, and temperature rise during the high-rate short-time charge/discharge, are illustrated and excluded for analysis, respectively. Based on the analysis of Butler-Volmer equation and Arrhenius empirical equation, a formula, which contains temperature and current known to influence the charge-transfer resistance, is derived logically. It indicates that the charge-transfer resistance reduces as the current amplitude increases at a fixed temperature, which fundamentally dominates the shrinking of the semi-circle at medium frequencies. Therefore, the medium-frequency impedance arc is able to represent the chemical reaction process, even under large current excitation (within a certain range).

URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::f905db496e57c07a62b810c8f8557631
https://doi.org/10.1007/s10800-015-0887-z

المؤلفون: Krishnan S. Hariharan, N. Munichandraiah, Surender Kumar, Prasant Kumar Nayak

المصدر: Journal of Applied Electrochemistry. 44:61-71

مصطلحات موضوعية: Resistive touchscreen, Chemistry, General Chemical Engineering, Analytical chemistry, Activation energy, Impedance parameters, law.invention, law, Electrode, Materials Chemistry, Electrochemistry, Equivalent circuit, Nyquist plot, Alternating current, Electrical impedance

الوصف: Detailed analysis of alternating current impedance data of LiMn2O4 electrodes measured at several temperatures and potentials was carried out. The Nyquist plots generally consisted of semicircles corresponding to two time constants. However, at low temperatures (−10 to 10 °C) and potential region between 3.90 and 4.20 V, three time constants were present. The third semicircle present at the middle to high frequency range was attributed to electronic resistance of LiMn2O4. Impedance parameters were evaluated using appropriate electrical equivalent circuits. From the temperature dependence of resistive parameters, activation energy values for the corresponding processes were calculated.

URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::ac7f92d96f45a6559da8fd91816723b5
https://doi.org/10.1007/s10800-013-0601-y

المؤلفون: Stavroula Koutalidi, Antonis Karantonis

المصدر: Journal of Applied Electrochemistry. 42:689-698

مصطلحات موضوعية: Work (thermodynamics), Physics::Instrumentation and Detectors, Chemistry, General Chemical Engineering, Analytical chemistry, Electrolyte, Electrochemistry, Cathode, Anode, law.invention, Mechanical system, Synchronization (alternating current), Chemical physics, law, Electrode, Materials Chemistry

الوصف: In the present work the modes of four-legged locomotion generated and controlled by a network of coupled electrochemical oscillatory electrode pairs are explored. Each pair, operating under constant potential conditions, consists of an iron disk (anode) and a copper coil (cathode) and all pairs are immersed in a common electrolytic bath (1 M H2SO4 and 0.4 M CuSO4). The electrochemistry of the system is studied and the conditions of oscillatory and synchronous firing are determined. The current response of each pair is determined by the geometry of the network: if the interactions are between the iron anodes then the oscillations are synchronized in-phase whereas if the interactions are between iron anodes and copper cathodes the oscillations are out-of-phase. The electric pulses produced by the network are supplied to a prototype, specially designed mechanical system where possible modes of four-legged locomotion are observed.

URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::488652abf98fd0983b5afd3a85ea1b95
https://doi.org/10.1007/s10800-012-0412-6