All-solid-state batteries offer an attractive option for developing safe lithium-ion batteries.Among the various solid-state electrolyte candidates for their applications,sulfide solid electrolytes are the most suitable owing to their high ionic conductivity and facile processability.However,their performance is extensively lower compared with those of conventional liquid electrolyte-based batteries mainly because of interfacial reactions between the solid electrolytes and high capacity cathodes.Moreover,the kinetic evolution reaction in the composite cathode of all-solid-state lithium batteries has not been actively dis-cussed.Here,electrochemical analyses were performed to investigate the differences between the organic liquid electrolyte-based battery and all-solid-state battery systems.Combined with electrochem-ical analyses and synchrotron-based in situ and ex situ X-ray analyses,it was confirmed that inhomoge-neous reactions were due to physical contact.Loosely contacted and/or isolated active material particles account for the inhomogeneously charged regions,which further intensify the inhomogeneous reactions during extended cycles,thereby increasing the polarization of the system.This study highlighted the ben-efits of electrochemo-mechanical integrity for securing a smooth conduction pathway and the develop-ment of a reliable homogeneous reaction system for the success of solid-state batteries.

Jaeyoung Kim;Wontae Lee;Jangwhan Seok;Eunkang Lee;Woosung Choi;Hyunyoung Park;Soyeong Yun;Minji Kim;Jun Lim;Won-Sub Yoon

Department of Energy Science,Sungkyunkwan University,Suwon 16419,South Korea;Pohang Accelerator Laboratory,Pohang University of Science and Technology,Pohang 37673,South Korea

能源化学

[1]Jaeyoung Kim;Wontae Lee;Jangwhan Seok;Eunkang Lee;Woosung Choi;Hyunyoung Park;Soyeong Yun;Minji Kim;Jun Lim;Won-Sub Yoon-.Inhomogeneous lithium-storage reaction triggering the inefficiency of all-solid-state batteries)[J].能源化学,2022(03):226-236

inhomoge,electrochemo

Inhomogeneous,lithium,storage,triggering,inefficiency,all,solid,state,batteries,All,offer,attractive,option,developing,safe,Among,various,candidates,their,applications,sulfide,electrolytes,most,suitable,owing,ionic,conductivity,facile,processability,However,performance,extensively,lower,compared,those,conventional,liquid,mainly,because,interfacial,reactions,between,capacity,cathodes,Moreover,kinetic,evolution,composite,has,not,been,actively,dis,cussed,Here,electrochemical,analyses,were,performed,investigate,differences,organic,battery,systems,Combined,synchrotron,situ,ray,was,confirmed,that,due,physical,Loosely,contacted,isolated,material,particles,account,inhomogeneously,charged,regions,which,further,intensify,during,extended,cycles,thereby,increasing,polarization,This,study,highlighted,ben,efits,mechanical,integrity,securing,smooth,conduction,pathway,ment,reliable,success

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