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NASICON Li1.2Mg0.1Zr1.9(PO4)3 Solid Electrolyte for an All‐Solid‐State Li‐Metal Battery
Small Methods ( IF 10.7 ) Pub Date : 2020-09-13 , DOI: 10.1002/smtd.202000764 Qiongyu Zhou 1, 2 , Biyi Xu 2 , Po‐Hsiu Chien 3, 4, 5 , Yutao Li 2 , Bing Huang 6 , Nan Wu 2 , Henghui Xu 2 , Nicholas S. Grundish 2 , Yan‐Yan Hu 3, 4 , John B. Goodenough 2
Small Methods ( IF 10.7 ) Pub Date : 2020-09-13 , DOI: 10.1002/smtd.202000764 Qiongyu Zhou 1, 2 , Biyi Xu 2 , Po‐Hsiu Chien 3, 4, 5 , Yutao Li 2 , Bing Huang 6 , Nan Wu 2 , Henghui Xu 2 , Nicholas S. Grundish 2 , Yan‐Yan Hu 3, 4 , John B. Goodenough 2
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A thin solid electrolyte with a high Li+ conductivity is used to separate the metallic lithium anode and the cathode in an all‐solid‐state Li‐metal battery. However, most solid Li‐ion electrolytes have a small electrochemical stability window, large interfacial resistance, and cannot block lithium‐dendrite growth when lithium is plated on charging of the cell. Mg2+ stabilizes a rhombohedral NASICON‐structured solid electrolyte of the formula Li1.2Mg0.1Zr1.9(PO4)3 (LMZP). This solid electrolyte has Li‐ion conductivity two orders of magnitude higher at 25 °C than that of the triclinic LiZr2(PO4)3. 7Li and 6Li NMR confirm the Li‐ions in two different crystallographic sites of the NASICON framework with 85% of the Li‐ions having a relatively higher mobility than the other 15%. The anode–electrolyte interface is further investigated with symmetric Li/LMZP/Li cell testing, while the cathode–electrolyte interface is explored with an all‐solid‐state Li/LMZP/LiFePO4 cell. The enhanced performance of these cells enabled by the Li1.2Mg0.1Zr1.9(PO4)3 solid electrolyte is stable upon repeated charge/discharge cycling.
中文翻译：
NASICON Li1.2Mg0.1Zr1.9（PO4）3固体电解质，用于全固态锂电池
具有高Li +电导率的稀薄固体电解质用于分隔全固态锂金属电池中的金属锂阳极和阴极。但是，大多数固体锂离子电解质的电化学稳定性窗口小，界面电阻大，并且在给电池充电时镀上锂时，不会阻止锂树枝状晶体的生长。Mg 2+使分子式为Li 1.2 Mg 0.1 Zr 1.9（PO 4）3（LMZP）的菱面体NASICON结构的固体电解质稳定。这种固体电解质在25°C时的锂离子电导率比三斜LiZr 2（PO 4）高两个数量级。3。7 Li和6 Li NMR证实了NASICON框架的两个不同结晶位中的锂离子，其中85％的锂离子具有比其他15％更高的迁移率。通过对称Li / LMZP / Li电池测试进一步研究了阳极-电解质界面，而使用全固态Li / LMZP / LiFePO 4电池探索了阴极-电解质界面。通过Li 1.2 Mg 0.1 Zr 1.9（PO 4）3固体电解质实现的这些电池性能的增强在反复的充电/放电循环后是稳定的。
更新日期：2020-09-13
中文翻译：
NASICON Li1.2Mg0.1Zr1.9（PO4）3固体电解质，用于全固态锂电池
具有高Li +电导率的稀薄固体电解质用于分隔全固态锂金属电池中的金属锂阳极和阴极。但是，大多数固体锂离子电解质的电化学稳定性窗口小，界面电阻大，并且在给电池充电时镀上锂时，不会阻止锂树枝状晶体的生长。Mg 2+使分子式为Li 1.2 Mg 0.1 Zr 1.9（PO 4）3（LMZP）的菱面体NASICON结构的固体电解质稳定。这种固体电解质在25°C时的锂离子电导率比三斜LiZr 2（PO 4）高两个数量级。3。7 Li和6 Li NMR证实了NASICON框架的两个不同结晶位中的锂离子，其中85％的锂离子具有比其他15％更高的迁移率。通过对称Li / LMZP / Li电池测试进一步研究了阳极-电解质界面，而使用全固态Li / LMZP / LiFePO 4电池探索了阴极-电解质界面。通过Li 1.2 Mg 0.1 Zr 1.9（PO 4）3固体电解质实现的这些电池性能的增强在反复的充电/放电循环后是稳定的。
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