Unraveling the Synergistic Coupling Mechanism of Li~+ Transport in an 'Ionogel-in-Ceramic' Hybrid Solid Electrolyte for Rechargeable Lithium Metal Battery

Song Xianli; Wang Chenlu; Chen JunwuXin SenYuan DuWang YanleiDong KunYang LipengWang GongyingZhang HaitaoZhang Suojiang

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Unraveling the Synergistic Coupling Mechanism of Li~+ Transport in an 'Ionogel-in-Ceramic' Hybrid Solid Electrolyte for Rechargeable Lithium Metal Battery

机译：Unraveling the Synergistic Coupling Mechanism of Li~+ Transport in an 'Ionogel-in-Ceramic' Hybrid Solid Electrolyte for Rechargeable Lithium Metal Battery

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Understanding the ionic transport behaviors in hybrid solid electrolytes (HSEs) is critically important for the practical realization of rechargeable Li-metal batteries (LMBs) with high safety. Herein, it is reported a new solid "Ionogel-in-Ceramic" electrolyte by using the Li1.3Al0.3Ti1.7(PO4)(3) (LATP) ceramic particles as a framework and "Poly(ionic liquid)s-in-Salt" ("PolyIL-in-Salt") ionogel as an ionic bridge via a simple pressing process. The "PolyIL-in-Salt" ionogel precursor is designed to improve the chemical compatibility at solid-solid interfaces. Molecular dynamics simulations reveal the roles of salt concentrations on the distribution of co-coordination of "PolyIL-in-Salt" ionogel. Moreover, the "PolyIL-in-Salt" ionogel containing co-coordination not only inhibits the parasitic reactions between LATP and Li anode but also provides efficient Li+ conducting pathways. Benefiting from the designed structure, the "Ionogel-in-Ceramic" HSE exhibits an excellent ionic conductivity of 0.17 mS cm(-1) at 50 degrees C. Meanwhile, the as-formed solid electrolyte enables a long cycle of over 3500 h in Li/Li symmetric cell. Further, all-solid-state lithium metal batteries fabricated on LiFePO4 and high voltage LiCoO2 cathodes deliver 160.0 mAh g(-1), 125.0 mAh g(-1), respectively. This study sheds light on the rational design of solid-state electrolytes with efficient interparticle Li+ conduction, compatible, stable, compact, and durable electrode-electrolyte interfaces.

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《Advanced functional materials》 |2022年第10期|2108706.1-2108706.13|共13页
作者
Song Xianli; Wang Chenlu; Chen JunwuXin SenYuan DuWang YanleiDong KunYang LipengWang GongyingZhang HaitaoZhang Suojiang;
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Chinese Acad Sci, Inst Proc Engn, Beijing Key Lab Ion Liquids Clean Proc, CAS Key Lab Green Proc & Engn, Beijing 100190, Peoples R China;

Chinese Acad Sci, Inst Proc Engn, Beijing Key Lab Ion Liquids Clean Proc, CAS Key Lab Green Proc & Engn, Beijing 100190, Peoples R China|Chinese Acad Sci, Chengdu Inst Organ Chem, Chengdu 610041, Peoples R China|Univ Chinese Acad Sci, Natl Engn Lab VOCs P;

Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R ChinaChangsha Univ Sci & Technol, Coll Mat Sci & Engn, 960,2nd Sect,Wanjiali RD S, Changsha 410004, Hunan, Peoples R ChinaChinese Acad Sci, Chengdu Inst Organ Chem, Chengdu 610041, Peoples R China|Univ Chinese Acad Sci, Natl Engn Lab VOCs Pollut Control Mat & Technol, Beijing 101408, Peoples R China;

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hybrid solid electrolytes; ionic bridges; ionogel-in-Ceramic; lithium metal batteries; poly(ionic liquid)s-in-salt;

Unraveling the Synergistic Coupling Mechanism of Li~+ Transport in an 'Ionogel-in-Ceramic' Hybrid Solid Electrolyte for Rechargeable Lithium Metal Battery

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