Enhanced grain boundary ionic conductivity of LiTa2PO8 solid electrolyte by 75Li2O-12.5B2O3-12.5SiO2 sintering additive |
| |
| Affiliation: | 1. Federal Institute of Santa Catarina (IFSC), Campus Criciúma, SC, Brazil;2. Department of Materials, Textiles and Chemical Engineering, Ghent University, Ghent, Belgium;3. Department of Materials Engineering (DEMa), Federal University of São Carlos (UFSCar), SP, Brazil;4. Institute of Ceramic Technology (ITC), Universidad Jaume I (UJI), Campus Riu Sec, Castellón, Spain;5. Department of Chemical Engineering (EQA), Graduate Program in Materials Science and Engineering (PGMAT), Federal University of Santa Catarina (UFSC), SC, Brazil;1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China;2. Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen 518057, China;1. Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, Taipei, Taiwan;2. Hocheng Corporation, Yingge District, New Taipei City, Taiwan;3. National Chung-Shan Institute of Science & Technology, Dual-Use Technology Development Center, Longtan District, Taoyuan City, Taiwan;1. State Key Laboratory of High-Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;1. School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology, 123, Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea;2. Ceramic Composites Team, DACC Carbon, 30 Unam-ro, Deokjin-gu, Jeonju-si, Jeonbuk 54853, Republic of Korea;3. Agency for Defense Development (ADD), Sanhaghoegwan, Yuseong-gu, Daejeon 34186, Republic of Korea;4. Research Center for Innovative Energy and Carbon Optimized Synthesis for Chemicals(Inn-ECOSysChem), Gwangju Institute of Science and Technology, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 61005, Republic of Korea;1. Key Laboratory of Special Functional Materials for Ecological Environment and Information, Hebei University of Technology, Ministry of Education, Tianjin 050019, People’s Republic of China;2. Huida Sanitary Ware Co., Ltd., Tangshan 063307, People’s Republic of China;3. School of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, People’s Republic of China |
| |
| Abstract: | LiTa2PO8(LTPO) has low electrolyte density and many pores at grain boundaries, and it is easy to precipitate dielectric phase LiTa3O8 at grain boundaries. The performance can be improved by adding 75Li2O-12.5B2O3-12.5SiO2 (LBS) sintering additive with low melting point during sintering. The effects of LBS addition on the microstructure and grain boundary ionic conductivity of LTPO electrolytes were studied. The results showed that the addition of LBS sintering additives reduced the sintering temperature, improved the density and stability of LTPO electrolyte samples, effectively inhibited the precipitation of LiTa3O8 phase, reduced the grain boundary impedance of samples, and improved the total ionic conductivity of electrolytes. When LBS was added at 0.4 wt%, the relative density of LTPO reached 93.54%, the grain boundary impedance decreased from 1243 Ω to 248.2 Ω, the total ionic conductivity increased from 1.55 × 10?4 S cm?1 to 6.51 × 10?4 S cm?1, and the ionic activation energy was 0.137 eV. |
| |
| Keywords: | Solid phase sintering Amorphous phase glass Ceramic glass composite electrolytes Grain boundary conductivity Symmetrical lithium battery |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
