首页|Excellent electrochemical compatibility of Li-rich glass-ceramic solid electrolyte enabling superior all-solid-state lithium batteries

Excellent electrochemical compatibility of Li-rich glass-ceramic solid electrolyte enabling superior all-solid-state lithium batteries

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Li2S-P2S5-type inorganic solid electrolytes with cation and/or anion doping are considered to be promis-ing candidates for all-solid-state batteries(ASSBs),due to their high ionic conductivity and electrochem-ical performances.However,compositional tuning of Li2S-P2S5 type inorganic solid electrolytes without doping has not been fully studied.In this work,Li-rich Li7P2S8I solid electrolyte was prepared with com-positional tuning by high energy ball mill process.The crystalline nature and the structural character-istics of the prepared solid electrolytes were studied with several physiochemical techniques.The effect of compositional tuning and the associated limitations were analyzed by laser Raman spectroscopy and solid-nuclear magnetic resonance spectroscopy(NMR)analysis techniques.The prepared Li-rich Li7P2S8I solid electrolyte exhibited higher ionic conductivity(6.27 mS cm-1)than the bare Li7P2S8I solid elec-trolyte(5.16 mS cm-1).Further,the prepared Li7.1P2S8.1I0.9 solid electrolyte is highly stable against lithium metal anode and is stable up to 600 charge-discharge cycles.Thus,the fabricated ASSB using Li-rich Li7P2S8I solid electrolyte exhibited excellent cycle stability of 97％specific capacity retention with less interfacial reaction.Electrochemical impedance spectroscopy and the laser Raman spectroscopy analy-sis after galvanostatic charge-discharge cycling confirmed the electrochemical stability of Li-rich Li7P2S8l solid electrolyte.

Solid electrolyteLi7P2S8ILi-rich solid electrolyteIonic conductivityHigh stabilityAll-solid-state batteries

Rajesh Rajagopal、Yuvaraj Subramanian、Yu Jin Jung、Sung Kang、Kwang-Sun Ryu

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Department of Chemistry,University of Ulsan,Doowang-dong,Nam-gu,Ulsan 44776,Korea

Energy Harvest Storage Research Center(EHSRC),University of Ulsan,Mugeo-dong,Nam-gu,Ulsan 44610,Korea

Research Center for Advanced Specialty Chemicals,Korea Research Institute of Chemical Technology(KRICT),Ulsan 44412,Korea

Research Institute of Industrial Science & Technology,San Hyoja-dong,Pohang 37673,Korea

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National Research Foundation of Korea(NRF)grantMinistry of Education,Science and Technology(MEST)of the Korean Government

NRF-2019R1A6A1A11053838

2024

10.1016/j.jmst.2023.12.038

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.191(24)