NASICON-structured Na3.1Zr1.95Mg0.05Si2PO12 solid electrolyte for solid-state sodium batteries
来源期刊：Rare Metals2018年第6期
论文作者：Jing Yang Hong-Li Wan Zhi-Hua Zhang Gao-Zhan Liu Xiao-Xiong Xu Yong-Sheng Hu Xia-Yin Yao
文章页码：480 - 487
摘 要：Using stable inorganic solid electrolyte to replace organic liquid electrolyte could significantly reduce potential safety risks of rechargeable batteries. Na-superionic conductor（NASICON）-structured solid electrolyte is one of the most promising sodium solid electrolytes and can be employed in solid-state sodium batteries. In this work, a NASICONstructured solid electrolyte Na3.1Zr1.95Mg0.05Si2PO12 was synthesized through a facile solid-state reaction, yielding high sodium-ionic conductivity of 1.33×10-3 S·cm-1 at room temperature. The results indicate that Mg2+is a suitable and economical substitution ion to replace Zr4+, and this synthesis route can be scaled up for powder preparation with low cost. In addition to electrolyte material preparation, solid-state batteries with Na3.1Zr1.95Mg0.05Si2PO12 as electrolyte were assembled. A specific capacity of 57.9 mAh·g-1 is maintained after 100 cycles under a current density of 0.5 C rate at room temperature. The favorable cycling performance of the solid-state battery suggests that Na3.1Zr1.95Mg0.05Si2PO12 is an ideal electrolyte candidate for solid-state sodium batteries.
Jing Yang1，Hong-Li Wan1,2，Zhi-Hua Zhang1,2，Gao-Zhan Liu1,2，Xiao-Xiong Xu1，Yong-Sheng Hu2,3，Xia-Yin Yao1
1. Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences2. University of Chinese Academy of Sciences3. Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences
摘 要：Using stable inorganic solid electrolyte to replace organic liquid electrolyte could significantly reduce potential safety risks of rechargeable batteries. Na-superionic conductor（NASICON）-structured solid electrolyte is one of the most promising sodium solid electrolytes and can be employed in solid-state sodium batteries. In this work, a NASICONstructured solid electrolyte Na3.1Zr1.95Mg0.05Si2PO12 was synthesized through a facile solid-state reaction, yielding high sodium-ionic conductivity of 1.33×10-3 S·cm-1 at room temperature. The results indicate that Mg2+is a suitable and economical substitution ion to replace Zr4+, and this synthesis route can be scaled up for powder preparation with low cost. In addition to electrolyte material preparation, solid-state batteries with Na3.1Zr1.95Mg0.05Si2PO12 as electrolyte were assembled. A specific capacity of 57.9 mAh·g-1 is maintained after 100 cycles under a current density of 0.5 C rate at room temperature. The favorable cycling performance of the solid-state battery suggests that Na3.1Zr1.95Mg0.05Si2PO12 is an ideal electrolyte candidate for solid-state sodium batteries.
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