The Experts below are selected from a list of 41055 Experts worldwide ranked by ideXlab platform
Bertrand Philippe - One of the best experts on this subject based on the ideXlab platform.
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investigation of the electrode electrolyte interface of fe2o3 composite electrodes li vs na batteries
Chemistry of Materials, 2014Co-Authors: Bertrand Philippe, Mario Valvo, Fredrik Lindgren, Hakan Rensmo, Kristina EdstromAbstract:We have investigated the properties of the electrode/electrolyte interfaces of composite electrodes based on nanostructured iron oxide Cycled in Li- and Na-half cells containing analogous electrolytes (i.e., LiClO4 or NaClO4 in ethylene carbonate:diethyl carbonate (EC:DEC)). A meticulous nondestructive step-by-step analysis of the first disCharge/Charge Cycle has been conducted via soft X-ray photoelectron spectroscopy using synchrotron radiation. In this way, different depths were probed by varying the photon energy (hν) for both electrochemical systems. The results of this thorough study clearly highlight the differences and the similarities of their respective solid electrolyte interface (SEI) layers in terms of formation, composition, structure, or thickness, as well as their conversion mechanisms. We specifically point out that the SEI coverage is more pronounced, and a homogeneous distribution rich in inorganic species exists in the case of Na, compared to the organic/inorganic layered structure obs...
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mnsn2 electrodes for li ion batteries mechanisms at the nano scale and electrode electrolyte interface
Electrochimica Acta, 2014Co-Authors: Bertrand Philippe, Abdelfattah Mahmoud, Jeanbernard Ledeuil, Moulay Tahar Sougrati, Kristina Edstrom, Remi Dedryvere, Danielle GonbeauAbstract:We have investigated the reaction mechanisms occurring upon the first disCharge/Charge Cycle of a MnSn2//Li electrochemical cell, by using bulk- and surface-sensitive characterization techniques (X ...
Kristina Edstrom - One of the best experts on this subject based on the ideXlab platform.
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investigation of the electrode electrolyte interface of fe2o3 composite electrodes li vs na batteries
Chemistry of Materials, 2014Co-Authors: Bertrand Philippe, Mario Valvo, Fredrik Lindgren, Hakan Rensmo, Kristina EdstromAbstract:We have investigated the properties of the electrode/electrolyte interfaces of composite electrodes based on nanostructured iron oxide Cycled in Li- and Na-half cells containing analogous electrolytes (i.e., LiClO4 or NaClO4 in ethylene carbonate:diethyl carbonate (EC:DEC)). A meticulous nondestructive step-by-step analysis of the first disCharge/Charge Cycle has been conducted via soft X-ray photoelectron spectroscopy using synchrotron radiation. In this way, different depths were probed by varying the photon energy (hν) for both electrochemical systems. The results of this thorough study clearly highlight the differences and the similarities of their respective solid electrolyte interface (SEI) layers in terms of formation, composition, structure, or thickness, as well as their conversion mechanisms. We specifically point out that the SEI coverage is more pronounced, and a homogeneous distribution rich in inorganic species exists in the case of Na, compared to the organic/inorganic layered structure obs...
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mnsn2 electrodes for li ion batteries mechanisms at the nano scale and electrode electrolyte interface
Electrochimica Acta, 2014Co-Authors: Bertrand Philippe, Abdelfattah Mahmoud, Jeanbernard Ledeuil, Moulay Tahar Sougrati, Kristina Edstrom, Remi Dedryvere, Danielle GonbeauAbstract:We have investigated the reaction mechanisms occurring upon the first disCharge/Charge Cycle of a MnSn2//Li electrochemical cell, by using bulk- and surface-sensitive characterization techniques (X ...
Dianlong Wang - One of the best experts on this subject based on the ideXlab platform.
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Effects of electrochemically active carbon and indium (III) oxide in negative plates on Cycle performance of valve-regulated lead-acid batteries during high-rate partial-state-of-Charge operation
Journal of Power Sources, 2013Co-Authors: Li Zhao, Baishuang Chen, Dianlong WangAbstract:In order to inhibit sulfation and hydrogen evolution of the negative plates and to prolong the Cycle life of valve-regulated lead-acid batteries for hybrid-electric vehicles, electrochemically active carbon (EAC) and Indium (III) oxide (In2O3) are added into negative active materials of valve-regulated lead-acid batteries. The influences of EAC and In2O3 on the Cycle performance of valve-regulated lead-acid batteries are investigated under high-rate partial-state-of-Charge conditions. Experiment results indicate that addition of EAC in negative active materials can prolong the high-rate partial-state-of-Charge Cycle performance of valve-regulated lead-acid batteries, whilst it results in the accelerated evolution rate of hydrogen during Charge process. It is also observed that EAC with an appropriate amount of In2O3 can effectively increase the overpotential of hydrogen evolution, which can not only produce the decreased hydrogen evolution rate and promote conversion of PbSO4 to Pb in capacity recovery process, but also prolong the high-rate partial-state-of-Charge Cycle life of valve-regulated lead-acid batteries. The battery added with 0.5% EAC and 0.02% In2O3 in negative active materials exhibits at least four times longer Cycle life than that without In2O3.
Toshihiro Yoshida - One of the best experts on this subject based on the ideXlab platform.
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Compatibility of Li7La3Zr2O12 Solid Electrolyte to All-Solid-State Battery Using Li Metal Anode
J. Electrochem. Soc., 2010Co-Authors: Masashi Kotobuki, Yosuke Sato, Hirokazu Munakata, Kiyoshi Kanamura, Toshihiro YoshidaAbstract:Electrochemical properties of Li 7 La 3 Zr 2 O 12 (LLZ) were investigated to reveal its availability as a solid electrolyte for all-solid-state reChargeable batteries with a Li metal anode. After calcination at 1230 ° C , a well-sintered LLZ pellet with a garnet-like structure was obtained, and its conductivity was 1.8 × 10 − 4 S cm − 1 at room temperature. The cyclic voltammogram of the Li/LLZ/Li cell showed that the dissolution and deposition reactions of lithium occurred reversibly without any reaction with LLZ. This indicates that a Li metal anode can be applied for an LLZ system. A full cell composed of a LiCoO 2 / LLZ / Li configuration was also operated successfully at expected voltage estimated from the redox potential of Li metal and LiCoO 2 . Simultaneously, an irreversible behavior was observed at the first disCharge and Charge Cycle due to an interfacial problem between LiCoO 2 and LLZ. The disCharge capacity of the full cell was 15 μ A h cm − 2 . These results reveal that LLZ is available for all-solid-state lithium batteries.
Faouzi Ben Ammar - One of the best experts on this subject based on the ideXlab platform.
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improved performance and energy management strategy for proton exchange membrane fuel cell backup battery in power electronic systems
International Journal of Hydrogen Energy, 2017Co-Authors: Kais Brik, Faouzi Ben AmmarAbstract:Abstract The objective of this paper is to propose an approach to analyze the reliability of proton exchange membrane fuel cell and backup battery in the power electronic systems by improving the strategy of energy management. This approach is based on the research of critical causes generating the degradation of power sources in the power electronic application and their undesirable effect. The analysis of potential failure modes that affect the fuel cell and the auxiliary source is developed by using analysis tools such as the Failure Mode and Effects Analysis (FMEA). The undesirable factors have to be taken into account in designing the topology of power converter in order to improve the performance of a fuel cell power system. In this context the authors propose to integrate a multiphase converter to minimize the current ripple and ameliorate the dynamic response of exchange membrane fuel cell. The improvement of battery lifetime is also ensured by the incorporation of an appropriate Charge Cycle that promises the full state of Charge and avoids the overCharge.