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Keywords = LLZTMO

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12 pages, 2769 KB  
Article
Application of Li6.4La3Zr1.45Ta0.5Mo0.05O12/PEO Composite Solid Electrolyte in High-Performance Lithium Batteries
by Chengjun Lin, Yaoyi Huang, Dingrong Deng, Haiji Xiong, Bin Lu, Jianchun Weng, Xiaohong Fan, Guifang Li, Ye Zeng, Yi Li and Qihui Wu
Materials 2024, 17(13), 3094; https://doi.org/10.3390/ma17133094 - 24 Jun 2024
Cited by 2 | Viewed by 1891
Abstract
Replacing the flammable liquid electrolytes with solid ones has been considered to be the most effective way to improve the safety of the lithium batteries. However, the solid electrolytes often suffer from low ionic conductivity and poor rate capability due to their relatively [...] Read more.
Replacing the flammable liquid electrolytes with solid ones has been considered to be the most effective way to improve the safety of the lithium batteries. However, the solid electrolytes often suffer from low ionic conductivity and poor rate capability due to their relatively stable molecular/atomic architectures. In this study, we report a composite solid electrolyte, in which polyethylene oxide (PEO) is the matrix and Li6.4La3Zr1.45Ta0.5Mo0.05O12 (LLZTMO) and Li6.4La3Zr1.4Ta0.6O12 (LLZTO) are the fillers. Ta/Mo co-doping can further promote the ion transport capacity in the electrolyte. The synthesized composite electrolytes exhibit high thermal stability (up to 413 °C) and good ionic conductivity (LLZTMO–PEO 2.00 × 10−4 S·cm−1, LLZTO–PEO 1.53 × 10−4 S·cm−1) at 35 °C. Compared with a pure PEO electrolyte, whose ionic conductivity is in the range of 10−7~10−6 S·cm−1, the ionic conductivity of composite solid electrolytes is greatly improved. The full cell assembled with LiFePO4 as the positive electrode exhibits excellent rate performance and good cycling stability, indicating that prepared solid electrolytes have great potential applications in lithium batteries. Full article
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