Interface Stability of Argyrodite Li6PS5Cl toward LiCoO2, LiNi1/3Co1/3Mn1/3O2, and LiMn2O4 in Bulk All-Solid-State Batteries

Auvergniot, Jérémie; Cassel, Alice; Ledeuil, Jean‐Bernard; Viallet, V.; Seznéc, Vincent; Dedryvère, Rémi

doi:10.1021/acs.chemmater.6b04990

Cited by 501 publications

(497 citation statements)

References 30 publications

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“…Such large interfacial impedance may originate from various factors such as non-uniform current distribution and poor physical contact between electrode material and electrolyte 13,39,40 . However, since carbon additives usually offer better current distribution in a cathode matrix, it is unlikely that the presence of carbon additives would increase the total impedance of composite cathode simply by inducing non-uniform current distribution 39 .…”

Section: Resultsmentioning

confidence: 99%

Investigation on the interface between Li10GeP2S12 electrolyte and carbon conductive agents in all-solid-state lithium battery

Yoon

Kim

Seong

et al. 2018

Sci Rep

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All-solid-state batteries are considered as one of the attractive alternatives to conventional lithium-ion batteries, due to their intrinsic safe properties benefiting from the use of non-flammable solid electrolytes in ASSBs. However, one of the issues in employing the solid-state electrolyte is the sluggish ion transport kinetics arising from the chemical and physical instability of the interfaces among solid components including electrode material, electrolyte and additive agents. In this work, we investigate the stability of the interface between carbon conductive agents and Li10GeP2S12 in a composite cathode and its effect on the electrochemical performance of ASSBs. It is found that the inclusion of various carbon conductive agents in composite cathode leads to inferior kinetic performance of the cathode despite expectedly enhanced electrical conductivity of the composite. We observe that the poor kinetic performance is attributed to a large interfacial impedance which is gradually developed upon the inclusions of the various carbon conductive agents regardless of their physical differences. The analysis through X-ray Photoelectron Spectroscopy suggests that the carbon additives in the composite cathode stimulate the electrochemical decomposition of LGPS electrolyte degrading its surface during cycling, indicating the large interfacial resistance stems from the undesirable decomposition of the electrolyte at the interface.

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Section: Resultsmentioning

confidence: 99%

Investigation on the interface between Li10GeP2S12 electrolyte and carbon conductive agents in all-solid-state lithium battery

Yoon

Kim

Seong

et al. 2018

Sci Rep

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“…During cycling, the voltage was varied between 0.62 and 4.12 V vs. Li + /Li, far outside the narrow electrochemical stability window predicted for these sulfide electrolytes 40, 41 . Recently, it was demonstrated that charging up to similar potentials results in oxidation of argyrodite Li 6 PS 5 Cl toward elemental sulfur, lithium polysulfides, P 2 S x ≤5 and LiCl 61 . Based on this, we suggest that the increase in activation energy is a result of the formation of an interfacial layer of similar oxidation products from the Li 6 PS 5 Br solid electrolyte that develop during the first cycles.…”

Section: Discussionmentioning

confidence: 99%

Accessing the bottleneck in all-solid state batteries, lithium-ion transport over the solid-electrolyte-electrode interface

et al. 2017

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Solid-state batteries potentially offer increased lithium-ion battery energy density and safety as required for large-scale production of electrical vehicles. One of the key challenges toward high-performance solid-state batteries is the large impedance posed by the electrode–electrolyte interface. However, direct assessment of the lithium-ion transport across realistic electrode–electrolyte interfaces is tedious. Here we report two-dimensional lithium-ion exchange NMR accessing the spontaneous lithium-ion transport, providing insight on the influence of electrode preparation and battery cycling on the lithium-ion transport over the interface between an argyrodite solid-electrolyte and a sulfide electrode. Interfacial conductivity is shown to depend strongly on the preparation method and demonstrated to drop dramatically after a few electrochemical (dis)charge cycles due to both losses in interfacial contact and increased diffusional barriers. The reported exchange NMR facilitates non-invasive and selective measurement of lithium-ion interfacial transport, providing insight that can guide the electrolyte–electrode interface design for future all-solid-state batteries.

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“…[3] Thus, SSBs have been focused on recently and many kinds of solid electrolyte have been developed, including polymer, [4] garnet, [5] argyrodite, [6] LISICON-type, [7] NASICON-type, [8] and Perovskite-type [9] structure. [3] Thus, SSBs have been focused on recently and many kinds of solid electrolyte have been developed, including polymer, [4] garnet, [5] argyrodite, [6] LISICON-type, [7] NASICON-type, [8] and Perovskite-type [9] structure.…”

Section: Doi: 101002/aenm201801528mentioning

confidence: 99%

Ameliorating the Interfacial Problems of Cathode and Solid‐State Electrolytes by Interface Modification of Functional Polymers

Wang

Zhang

Wang

et al. 2018

Advanced Energy Materials

146

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Solid‐state Li secondary batteries may become high energy density storage devices for the next generation of electric vehicles, depending on the compatibility of electrode materials and suitable solid electrolytes. Specifically, it is a great challenge to obtain a stable interface between these solid electrolytes and cathodes. Herein, this issue can be effectively addressed by constructing a poly(acrylonitrile‐co‐butadiene) coated layer onto the surface of LiNi0.6Mn0.2Co0.2O2 cathode materials. The polymer layer plays a vital role in working as a protective shell to retard side reaction and ameliorate the contact of the solid–solid interface during the cycling process. In the resultant solid‐state batteries, both rate capacity (99 mA h g−1 at 3 C) and cycling stability (75% capacity retention after 400 cycles) are improved after coating. This impressive performance highlights the great importance of layer modification in the cathode and inspires the development of solid‐state batteries toward practical applications.

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Interface Stability of Argyrodite Li₆PS₅Cl toward LiCoO₂, LiNi_1/3Co_1/3Mn_1/3O₂, and LiMn₂O₄ in Bulk All-Solid-State Batteries

Cited by 501 publications

References 30 publications

Investigation on the interface between Li10GeP2S12 electrolyte and carbon conductive agents in all-solid-state lithium battery

Investigation on the interface between Li10GeP2S12 electrolyte and carbon conductive agents in all-solid-state lithium battery

Accessing the bottleneck in all-solid state batteries, lithium-ion transport over the solid-electrolyte-electrode interface

Ameliorating the Interfacial Problems of Cathode and Solid‐State Electrolytes by Interface Modification of Functional Polymers

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