Host–Guest Inversion Engineering Induced Superionic Composite Solid Electrolytes for High-Rate Solid-State Alkali Metal Batteries
Highlights Host–guest inversion engineering is proposed to create poly(vinylidene fluoride-hexafluoropropylene) (PVH)-in-SiO2 composite solid electrolytes with an original “polymer guest-in-ceramic host” architecture, exhibiting optimized interfacial contacts and comprehensive properties. The PVH-in...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2025-03-01
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| Series: | Nano-Micro Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s40820-025-01691-7 |
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| Summary: | Highlights Host–guest inversion engineering is proposed to create poly(vinylidene fluoride-hexafluoropropylene) (PVH)-in-SiO2 composite solid electrolytes with an original “polymer guest-in-ceramic host” architecture, exhibiting optimized interfacial contacts and comprehensive properties. The PVH-in-SiO2 exhibits an overwhelming ionic conductivity of 1.32 × 10−3 S cm−1 at 25 °C, with an ultralow residual solvent content of 2.9 wt%. In addition, the LiFePO4|PVH-in-SiO2|Li full cells deliver a significant capacity retention of 92.9% at an ultrahigh rate of 3C after 300 cycles at 25 °C. The host–guest inversion engineering is a versatile strategy, as proved by preparing Na+ and K+-based PVH-in-SiO2 composite solid electrolytes, delivering excellent ionic conductivity of 10−4 S cm−1 at 25 °C (vs. 10−6–10−5 S cm−1 of previous reports). |
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| ISSN: | 2311-6706 2150-5551 |