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Remi Dedryvere - One of the best experts on this subject based on the ideXlab platform.

  • Interface Stability of argyrodite li6ps5cl toward licoo2 lini1 3co1 3mn1 3o2 and limn2o4 in bulk all solid state batteries
    Chemistry of Materials, 2017
    Co-Authors: Jeremie Auvergniot, Alice Cassel, Jeanbernard Ledeuil, Virginie Viallet, Vincent Seznec, Remi Dedryvere
    Abstract:

    Argyrodite Li6PS5Cl is a good candidate for being a solid electrolyte for bulk all-solid-state Li-ion batteries because of its high ionic conductivity and its good processability. However, the Interface Stability of sulfide-based electrolytes toward active materials (negative or positive electrodes) is known to be lower than that of oxide-based electrolytes. In this work, we investigate the Interface Stability of argyrodite toward several positive electrode materials: LiCoO2, LiNi1/3Co1/3Mn1/3O2, and LiMn2O4. All-solid-state half-cells were cycled, and the Interface mechanisms were characterized by Auger electron spectroscopy and X-ray photoelectron spectroscopy. We show that Li6PS5Cl is oxidized into elemental sulfur, lithium polysulfides, P2Sx (x ≥ 5), phosphates, and LiCl at the Interface with the positive electrode active materials. In spite of this Interface reactivity, good capacity retention was observed over 300 cycles. Li6PS5Cl shows some reversible electrochemical activity (redox processes) that...

  • Interface Stability of Argyrodite Li6PS5Cl toward LiCoO2, LiNi1/3Co1/3Mn1/3O2, and LiMn2O4 in Bulk All-Solid-State Batteries
    Chemistry of Materials, 2017
    Co-Authors: Jeremie Auvergniot, Alice Cassel, Jeanbernard Ledeuil, Virginie Viallet, Vincent Seznec, Remi Dedryvere
    Abstract:

    Argyrodite Li6PS5Cl is a good candidate for being a solid electrolyte for bulk all-solid-state Li-ion batteries because of its high ionic conductivity and its good processability. However, the Interface Stability of sulfide-based electrolytes toward active materials (negative or positive electrodes) is known to be lower than that of oxide-based electrolytes. In this work, we investigate the Interface Stability of argyrodite toward several positive electrode materials: LiCoO2, LiNi1/3Co1/3Mn1/3O2, and LiMn2O4. All-solid-state half-cells were cycled, and the Interface mechanisms were characterized by Auger electron spectroscopy and X-ray photoelectron spectroscopy. We show that Li6PS5Cl is oxidized into elemental sulfur, lithium polysulfides, P2Sx (x ≥ 5), phosphates, and LiCl at the Interface with the positive electrode active materials. In spite of this Interface reactivity, good capacity retention was observed over 300 cycles. Li6PS5Cl shows some reversible electrochemical activity (redox processes) that...

  • Interface Stability of Argyrodite Li6PS5Cl toward LiCoO2, LiNi1/3Co1/3Mn1/3O2, and LiMn2O4 in Bulk All-Solid-State Batteries
    Chemistry of Materials, 2017
    Co-Authors: Jeremie Auvergniot, Alice Cassel, Jeanbernard Ledeuil, Virginie Viallet, Vincent Seznec, Remi Dedryvere
    Abstract:

    Argyrodite Li6PS5Cl is a good candidate for being a solid electrolyte for bulk all-solid-state Li-ion batteries because of its high ionic conductivity and its good processability. However, the Interface Stability of sulfide-based electrolytes toward active materials (negative or positive electrodes) is known to be lower than that of oxide-based electrolytes. In this work, we investigate the Interface Stability of argyrodite toward several positive electrode materials: LiCoO2, LiNi1/3Co1/3Mn1/3O2, and LiMn2O4. All-solid-state half-cells were cycled, and the Interface mechanisms were characterized by Auger electron spectroscopy and X-ray photoelectron spectroscopy. We show that Li6PS5Cl is oxidized into elemental sulfur, lithium polysulfides, P2Sx (x ≥ 5), phosphates, and LiCl at the Interface with the positive electrode active materials. In spite of this Interface reactivity, good capacity retention was observed over 300 cycles. Li6PS5Cl shows some reversible electrochemical activity (redox processes) that might contribute to the reversible capacity of the battery.

Gerbrand Ceder - One of the best experts on this subject based on the ideXlab platform.

  • Understanding Interface Stability in solid-state batteries
    Nature Reviews Materials, 2019
    Co-Authors: Yihan Xiao, Yan Wang, Jae Chul Kim, Lincoln J. Miara, Gerbrand Ceder
    Abstract:

    Solid-state batteries (SSBs) using a solid electrolyte show potential for providing improved safety as well as higher energy and power density compared with conventional Li-ion batteries. However, two critical bottlenecks remain: the development of solid electrolytes with ionic conductivities comparable to or higher than those of conventional liquid electrolytes and the creation of stable Interfaces between SSB components, including the active material, solid electrolyte and conductive additives. Although the first goal has been achieved in several solid ionic conductors, the high impedance at various solid/solid Interfaces remains a challenge. Recently, computational models based on ab initio calculations have successfully predicted the Stability of solid electrolytes in various systems. In addition, a large amount of experimental data has been accumulated for different Interfaces in SSBs. In this Review, we summarize the experimental findings for various classes of solid electrolytes and relate them to computational predictions, with the aim of providing a deeper understanding of the interfacial reactions and insight for the future design and engineering of Interfaces in SSBs. We find that, in general, the electrochemical Stability and interfacial reaction products can be captured with a small set of chemical and physical principles. The reliable operation of solid-state batteries requires stable or passivating Interfaces between solid components. In this Review, we discuss models for interfacial reactions and relate the predictions to experimental findings, aiming to provide a deeper understanding of Interface Stability.

  • Interface Stability in solid state batteries
    Chemistry of Materials, 2016
    Co-Authors: William D Richards, Yan Wang, Lincoln J. Miara, Gerbrand Ceder
    Abstract:

    Development of high conductivity solid-state electrolytes for lithium ion batteries has proceeded rapidly in recent years, but incorporating these new materials into high-performing batteries has proven difficult. Interfacial resistance is now the limiting factor in many systems, but the exact mechanisms of this resistance have not been fully explained - in part because experimental evaluation of the Interface can be very difficult. In this work, we develop a computational methodology to examine the thermodynamics of formation of resistive interfacial phases. The predicted interfacial phase formation is well correlated with experimental interfacial observations and battery performance. We calculate that thiophosphate electrolytes have especially high reactivity with high voltage cathodes and a narrow electrochemical Stability window. We also find that a number of known electrolytes are not inherently stable but react in situ with the electrode to form passivating but ionically conducting barrier layers. A...

Ka Ram Lim - One of the best experts on this subject based on the ideXlab platform.

Do Hyang Kim - One of the best experts on this subject based on the ideXlab platform.

  • effect of thermal Stability of the amorphous substrate on the amorphous oxide growth on zr al cu ni metallic glass surfaces
    Corrosion Science, 2013
    Co-Authors: Ka Ram Lim, Won Tae Kim, Eun-sung Lee, Annett Gebert, Jürgen Eckert, Jin Man Park, Suk Jun Kim, Sang Soo Jee, Se Yun Kim, Do Hyang Kim
    Abstract:

    Abstract In the present study, we propose that the glass Stability of an amorphous oxide film is highly dependent on the Interface Stability between the amorphous oxide and the amorphous substrate. The Interface Stability is closely linked to the thermal Stability of the amorphous substrate, which is changed by the chemical composition shift during formation of the oxide layer. Therefore, significant improvement of the oxidation resistance in metallic glass systems can be achieved by controlling the compositional changes underneath the oxide layer.

Hyang Kim - One of the best experts on this subject based on the ideXlab platform.