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NASICON-structured Na3.1Zr1.95Mg0.05Si2PO12 solid electrolyte for solid-state sodium batteries

查看全文 作　　者：Jing [1]Yang;HongLi [1,2]Wan;ZhiHua [1,2]Zhang;GaoZhan [1,2]Liu;XiaoXiong [1]Xu;YongSheng [2,3]Hu;Xia-Yin [1]Yao 高影响力作者 机构地区：[1]Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences, Ningbo 315201, China;[2]University of Chinese Academy of Sciences, Beijing 100049,China;[3]Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics,Chinese Academy of Sciences, Beijing 100190, China高影响力机构 出　　处：《Rare Metals》索引2018年第37卷第6期,共8页高影响力期刊 基　　金：financially supported by the National Key Research and Development Program of China(No.2016YFB0100105);Strategic Priority Program of the Chinese Academy of Sciences(No.XDA09010203);Zhejiang Provincial Natural Science Foundation of China(Nos.LD18E020004,LY18E020018 and LY18E030011);the Youth Innovation Promotion Association CAS(No.2017342) 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 Na_(3.1)Zr_(1.95)Mg_(0.05)Si_2PO_(12) 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 Mg^(2+)is a suitable and economical substitution ion to replace Zr^(4+), and this synthesis route can be scaled up for powder preparation with low cost. In addition to electrolyte material preparation, solid-state batteries with Na_(3.1)Zr_(1.95)Mg_(0.05)Si_2PO_(12) 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 Na_(3.1)Zr_(1.95)Mg_(0.05)Si_2PO_(12) is an ideal electrolyte candidate for solid-state sodium batteries. 关 键 词：NASICON 液体电解质 固态电池 固态反应 钠离子 组织 固体电解质 房间温度
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