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High-Voltage All-Solid-State Na-Ion-Based Full Cells Enabled by All NASICON-Structured Materials
- Sun, Hua-Bin, Guo, Jin-Zhi, Zhang, Yi, Wei, Tao, Zhou, Ying-Xian, Zhang, Lu-Lu, Wu, Xing-Long, Huang, Yunhui, Luo, Wei
- ACS applied materials & interfaces 2019 v.11 no.27 pp. 24192-24197
- anodes, batteries, cathodes, electric potential difference, electrolytes, liquids, sodium
- Na super ionic conductor (NASICON)-structured materials have evolved to play many critical roles in battery systems because of their three-dimensional framework structures. Here, by coupling NASICON-structured Na₃V₂(PO₄)₂O₂F cathodes and Na₃V₂(PO₄)₃ anodes, an asymmetric Na-ion-based full cell exhibits two flat voltage plateaus at about 2.3 and 1.9 V and a high capacity of 101 mA h/g. Moreover, an all-solid-state Na-ion battery has been further enabled by the concept of using all NASICON-structured materials, including cathodes, anodes, and electrolytes (Na₅YSi₄O₁₂), which delivers a high output voltage. Importantly, the full cell displays high safety without using a flammable organic liquid electrolyte and superior structure stability with all NASICON-structured materials.