Doping engineering of scandium‐based solid‐state electrolytes toward superior ionic conductivity
Abstract One key research point of solid‐state electrolytes (SSEs) is ionic conductivity. To date, their ionic conductivity is relatively low to meet the requirements of practical applications; thus, more investigations on the migration mechanisms are needed. Here, we constructed scandium‐based hali...
| الحاوية / القاعدة: | EcoMat |
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| المؤلفون الرئيسيون: | , , , , |
| التنسيق: | مقال |
| اللغة: | الإنجليزية |
| منشور في: |
Wiley
2023-03-01
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| الموضوعات: | |
| الوصول للمادة أونلاين: | https://doi.org/10.1002/eom2.12315 |
| _version_ | 1850128062120722432 |
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| author | Hongtu Zhang Zhichao Zeng Xiaomeng Shi Chun‐Hai Wang Yaping Du |
| author_facet | Hongtu Zhang Zhichao Zeng Xiaomeng Shi Chun‐Hai Wang Yaping Du |
| author_sort | Hongtu Zhang |
| collection | DOAJ |
| container_title | EcoMat |
| description | Abstract One key research point of solid‐state electrolytes (SSEs) is ionic conductivity. To date, their ionic conductivity is relatively low to meet the requirements of practical applications; thus, more investigations on the migration mechanisms are needed. Here, we constructed scandium‐based halide SSEs (Li3‐xSc1‐x(Zr/Hf)xCl6, x = 0 ~ 0.5). The highest ionic conductivities (1.61 and 1.33 mS/cm) and the lowest activation energies (0.326 and 0.323 eV) are shown in Li2.6Sc0.6Zr0.4Cl6 (LSZC~0.4) and Li2.6Sc0.6Hf0.4Cl6 (LSHC~0.4), respectively. Their electrochemical windows in the cells of Li/Li7P3S11/LSZC~0.4/LSZC~0.4‐C and Li/Li7P3S11/LSHC~0.4/LSHC~0.4‐C are 1.3 ~ 4.2 V and 1.6 ~ 4.1 V versus Li+/Li, respectively. The crystal structures and the Li+ chemical environments were investigated by X‐ray diffraction and 7Li solid‐state magic angle spinning nuclear magnetic resonance, indicating weaker bond strengths of LiCl to facilitate the transportation of Li+. The potential reason explaining the increased ionic conductivity was determined based on the bond valence site energy theory. |
| format | Article |
| id | doaj-art-dc32f92a7ae8488c873b8f5e7c8cd698 |
| institution | Directory of Open Access Journals |
| issn | 2567-3173 |
| language | English |
| publishDate | 2023-03-01 |
| publisher | Wiley |
| record_format | Article |
| spelling | doaj-art-dc32f92a7ae8488c873b8f5e7c8cd6982025-08-19T23:53:43ZengWileyEcoMat2567-31732023-03-0153n/an/a10.1002/eom2.12315Doping engineering of scandium‐based solid‐state electrolytes toward superior ionic conductivityHongtu Zhang0Zhichao Zeng1Xiaomeng Shi2Chun‐Hai Wang3Yaping Du4Tianjin Key Lab for Rare Earth Materials and Applications, Center for Rare Earth and Inorganic Functional Materials, Smart Sensing Interdisciplinary Science Center, School of Materials Science and Engineering, National Institute for Advanced Materials Nankai University Tianjin ChinaTianjin Key Lab for Rare Earth Materials and Applications, Center for Rare Earth and Inorganic Functional Materials, Smart Sensing Interdisciplinary Science Center, School of Materials Science and Engineering, National Institute for Advanced Materials Nankai University Tianjin ChinaTianjin Key Lab for Rare Earth Materials and Applications, Center for Rare Earth and Inorganic Functional Materials, Smart Sensing Interdisciplinary Science Center, School of Materials Science and Engineering, National Institute for Advanced Materials Nankai University Tianjin ChinaState Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi'an ChinaTianjin Key Lab for Rare Earth Materials and Applications, Center for Rare Earth and Inorganic Functional Materials, Smart Sensing Interdisciplinary Science Center, School of Materials Science and Engineering, National Institute for Advanced Materials Nankai University Tianjin ChinaAbstract One key research point of solid‐state electrolytes (SSEs) is ionic conductivity. To date, their ionic conductivity is relatively low to meet the requirements of practical applications; thus, more investigations on the migration mechanisms are needed. Here, we constructed scandium‐based halide SSEs (Li3‐xSc1‐x(Zr/Hf)xCl6, x = 0 ~ 0.5). The highest ionic conductivities (1.61 and 1.33 mS/cm) and the lowest activation energies (0.326 and 0.323 eV) are shown in Li2.6Sc0.6Zr0.4Cl6 (LSZC~0.4) and Li2.6Sc0.6Hf0.4Cl6 (LSHC~0.4), respectively. Their electrochemical windows in the cells of Li/Li7P3S11/LSZC~0.4/LSZC~0.4‐C and Li/Li7P3S11/LSHC~0.4/LSHC~0.4‐C are 1.3 ~ 4.2 V and 1.6 ~ 4.1 V versus Li+/Li, respectively. The crystal structures and the Li+ chemical environments were investigated by X‐ray diffraction and 7Li solid‐state magic angle spinning nuclear magnetic resonance, indicating weaker bond strengths of LiCl to facilitate the transportation of Li+. The potential reason explaining the increased ionic conductivity was determined based on the bond valence site energy theory.https://doi.org/10.1002/eom2.12315dopinghalide solid‐state electrolytesionic conductivityrare‐earth |
| spellingShingle | Hongtu Zhang Zhichao Zeng Xiaomeng Shi Chun‐Hai Wang Yaping Du Doping engineering of scandium‐based solid‐state electrolytes toward superior ionic conductivity doping halide solid‐state electrolytes ionic conductivity rare‐earth |
| title | Doping engineering of scandium‐based solid‐state electrolytes toward superior ionic conductivity |
| title_full | Doping engineering of scandium‐based solid‐state electrolytes toward superior ionic conductivity |
| title_fullStr | Doping engineering of scandium‐based solid‐state electrolytes toward superior ionic conductivity |
| title_full_unstemmed | Doping engineering of scandium‐based solid‐state electrolytes toward superior ionic conductivity |
| title_short | Doping engineering of scandium‐based solid‐state electrolytes toward superior ionic conductivity |
| title_sort | doping engineering of scandium based solid state electrolytes toward superior ionic conductivity |
| topic | doping halide solid‐state electrolytes ionic conductivity rare‐earth |
| url | https://doi.org/10.1002/eom2.12315 |
| work_keys_str_mv | AT hongtuzhang dopingengineeringofscandiumbasedsolidstateelectrolytestowardsuperiorionicconductivity AT zhichaozeng dopingengineeringofscandiumbasedsolidstateelectrolytestowardsuperiorionicconductivity AT xiaomengshi dopingengineeringofscandiumbasedsolidstateelectrolytestowardsuperiorionicconductivity AT chunhaiwang dopingengineeringofscandiumbasedsolidstateelectrolytestowardsuperiorionicconductivity AT yapingdu dopingengineeringofscandiumbasedsolidstateelectrolytestowardsuperiorionicconductivity |