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Degradation Mechanisms at the Li10GeP2S12/LiCoO2 Cathode Interface in an All-Solid-State Lithium-Ion Battery.
ACS Appl Mater Interfaces. 2018 Jul 05; 10(26):22226-22236.AA

Abstract

All-solid-state batteries (ASSBs) show great potential for providing high power and energy densities with enhanced battery safety. While new solid electrolytes (SEs) have been developed with high enough ionic conductivities, SSBs with long operational life are still rarely reported. Therefore, on the way to high-performance and long-life ASSBs, a better understanding of the complex degradation mechanisms, occurring at the electrode/electrolyte interfaces is pivotal. While the lithium metal/solid electrolyte interface is receiving considerable attention due to the quest for high energy density, the interface between the active material and solid electrolyte particles within the composite cathode is arguably the most difficult to solve and study. In this work, multiple characterization methods are combined to better understand the processes that occur at the LiCoO2 cathode and the Li10GeP2S12 solid electrolyte interface. Indium and Li4Ti5O12 are used as anode materials to avoid the instability problems associated with Li-metal anodes. Capacity fading and increased impedances are observed during long-term cycling. Postmortem analysis with scanning transmission electron microscopy, electron energy loss spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy show that electrochemically driven mechanical failure and degradation at the cathode/solid electrolyte interface contribute to the increase in internal resistance and the resulting capacity fading. These results suggest that the development of electrochemically more stable SEs and the engineering of cathode/SE interfaces are crucial for achieving reliable SSB performance.

Authors+Show Affiliations

Physikalisch-Chemisches Institut & Center for Materials Research , Justus-Liebig-Universität Giessen , Heinrich-Buff-Ring 17 , 35392 Giessen , Germany.Physikalisch-Chemisches Institut & Center for Materials Research , Justus-Liebig-Universität Giessen , Heinrich-Buff-Ring 17 , 35392 Giessen , Germany. Departments of Materials and Chemistry , University of Oxford , OX1 3PH Oxford , United Kingdom.Physikalisch-Chemisches Institut & Center for Materials Research , Justus-Liebig-Universität Giessen , Heinrich-Buff-Ring 17 , 35392 Giessen , Germany.Physikalisch-Chemisches Institut & Center for Materials Research , Justus-Liebig-Universität Giessen , Heinrich-Buff-Ring 17 , 35392 Giessen , Germany.Departments of Materials and Chemistry , University of Oxford , OX1 3PH Oxford , United Kingdom.Physikalisch-Chemisches Institut & Center for Materials Research , Justus-Liebig-Universität Giessen , Heinrich-Buff-Ring 17 , 35392 Giessen , Germany.Departments of Materials and Chemistry , University of Oxford , OX1 3PH Oxford , United Kingdom.Physikalisch-Chemisches Institut & Center for Materials Research , Justus-Liebig-Universität Giessen , Heinrich-Buff-Ring 17 , 35392 Giessen , Germany.Physikalisch-Chemisches Institut & Center for Materials Research , Justus-Liebig-Universität Giessen , Heinrich-Buff-Ring 17 , 35392 Giessen , Germany.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29877698

Citation

Zhang, Wenbo, et al. "Degradation Mechanisms at the Li10GeP2S12/LiCoO2 Cathode Interface in an All-Solid-State Lithium-Ion Battery." ACS Applied Materials & Interfaces, vol. 10, no. 26, 2018, pp. 22226-22236.
Zhang W, Richter FH, Culver SP, et al. Degradation Mechanisms at the Li10GeP2S12/LiCoO2 Cathode Interface in an All-Solid-State Lithium-Ion Battery. ACS Appl Mater Interfaces. 2018;10(26):22226-22236.
Zhang, W., Richter, F. H., Culver, S. P., Leichtweiss, T., Lozano, J. G., Dietrich, C., Bruce, P. G., Zeier, W. G., & Janek, J. (2018). Degradation Mechanisms at the Li10GeP2S12/LiCoO2 Cathode Interface in an All-Solid-State Lithium-Ion Battery. ACS Applied Materials & Interfaces, 10(26), 22226-22236. https://doi.org/10.1021/acsami.8b05132
Zhang W, et al. Degradation Mechanisms at the Li10GeP2S12/LiCoO2 Cathode Interface in an All-Solid-State Lithium-Ion Battery. ACS Appl Mater Interfaces. 2018 Jul 5;10(26):22226-22236. PubMed PMID: 29877698.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Degradation Mechanisms at the Li10GeP2S12/LiCoO2 Cathode Interface in an All-Solid-State Lithium-Ion Battery. AU - Zhang,Wenbo, AU - Richter,Felix H, AU - Culver,Sean P, AU - Leichtweiss,Thomas, AU - Lozano,Juan G, AU - Dietrich,Christian, AU - Bruce,Peter G, AU - Zeier,Wolfgang G, AU - Janek,Jürgen, Y1 - 2018/06/20/ PY - 2018/6/8/pubmed PY - 2018/6/8/medline PY - 2018/6/8/entrez KW - Li10GeP2S12 KW - XPS KW - degradation KW - interface KW - solid electrolyte KW - solid-state battery SP - 22226 EP - 22236 JF - ACS applied materials & interfaces JO - ACS Appl Mater Interfaces VL - 10 IS - 26 N2 - All-solid-state batteries (ASSBs) show great potential for providing high power and energy densities with enhanced battery safety. While new solid electrolytes (SEs) have been developed with high enough ionic conductivities, SSBs with long operational life are still rarely reported. Therefore, on the way to high-performance and long-life ASSBs, a better understanding of the complex degradation mechanisms, occurring at the electrode/electrolyte interfaces is pivotal. While the lithium metal/solid electrolyte interface is receiving considerable attention due to the quest for high energy density, the interface between the active material and solid electrolyte particles within the composite cathode is arguably the most difficult to solve and study. In this work, multiple characterization methods are combined to better understand the processes that occur at the LiCoO2 cathode and the Li10GeP2S12 solid electrolyte interface. Indium and Li4Ti5O12 are used as anode materials to avoid the instability problems associated with Li-metal anodes. Capacity fading and increased impedances are observed during long-term cycling. Postmortem analysis with scanning transmission electron microscopy, electron energy loss spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy show that electrochemically driven mechanical failure and degradation at the cathode/solid electrolyte interface contribute to the increase in internal resistance and the resulting capacity fading. These results suggest that the development of electrochemically more stable SEs and the engineering of cathode/SE interfaces are crucial for achieving reliable SSB performance. SN - 1944-8252 UR - https://www.unboundmedicine.com/medline/citation/29877698/Degradation_Mechanisms_at_the_Li10GeP2S12/LiCoO2_Cathode_Interface_in_an_All_Solid_State_Lithium_Ion_Battery_ L2 - https://dx.doi.org/10.1021/acsami.8b05132 DB - PRIME DP - Unbound Medicine ER -
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