中国物理B ›› 2018, Vol. 27 ›› Issue (12): 128201-128201.doi: 10.1088/1674-1056/27/12/128201

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Imaging the diffusion pathway of Al3+ ion in NASICON-type (Al0.2Zr0.8)20/19Nb(PO4)3 as electrolyte for rechargeable solid-state Al batteries

Jie Wang(王捷), Chun-Wen Sun(孙春文), Yu-Dong Gong(巩玉栋), Huai-Ruo Zhang(张怀若), Jose Antonio Alonso, María Teresa Fernández-Díaz, Zhong-Lin Wang(王中林), John B Goodenough   

  1. 1 CAS Center for Excellence in Nanoscience, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences(CAS), Beijing 100083, China;
    2 Theiss Research, La Jolla, California 92037, USA;
    3 Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA;
    4 Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco 28049 Madrid, Spain;
    5 Institut Laue Langevin, BP 156 X, GrenobleCedex, France;
    6 School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, China;
    7 School of Material Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0245, USA;
    8 Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78712, USA;
    9 Center on Nanoenergy Research, School of Physical Science and Technology, Guangxi University, Nanning 530004, China
  • 收稿日期:2018-09-26 修回日期:2018-10-21 出版日期:2018-12-05 发布日期:2018-12-05
  • 通讯作者: Chun-Wen Sun, Huai-Ruo Zhang, Jose Antonio Alonso E-mail:sunchunwen@binn.cas.cn;huairuo.zhang@nist.gov;ja.alonso@icmm.csic.es
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 51672029, 51372271, and 51172275) and the National Key Research and Development Project from the Ministry of Science and Technology, China (Grant No. 2016YFA0202702).

Imaging the diffusion pathway of Al3+ ion in NASICON-type (Al0.2Zr0.8)20/19Nb(PO4)3 as electrolyte for rechargeable solid-state Al batteries

Jie Wang(王捷)1, Chun-Wen Sun(孙春文)1,6,9, Yu-Dong Gong(巩玉栋)1, Huai-Ruo Zhang(张怀若)2,3, Jose Antonio Alonso4, María Teresa Fernández-Díaz5, Zhong-Lin Wang(王中林)1,6,7,9, John B Goodenough8   

  1. 1 CAS Center for Excellence in Nanoscience, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences(CAS), Beijing 100083, China;
    2 Theiss Research, La Jolla, California 92037, USA;
    3 Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA;
    4 Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco 28049 Madrid, Spain;
    5 Institut Laue Langevin, BP 156 X, GrenobleCedex, France;
    6 School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, China;
    7 School of Material Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0245, USA;
    8 Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78712, USA;
    9 Center on Nanoenergy Research, School of Physical Science and Technology, Guangxi University, Nanning 530004, China
  • Received:2018-09-26 Revised:2018-10-21 Online:2018-12-05 Published:2018-12-05
  • Contact: Chun-Wen Sun, Huai-Ruo Zhang, Jose Antonio Alonso E-mail:sunchunwen@binn.cas.cn;huairuo.zhang@nist.gov;ja.alonso@icmm.csic.es
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 51672029, 51372271, and 51172275) and the National Key Research and Development Project from the Ministry of Science and Technology, China (Grant No. 2016YFA0202702).

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摘要：

Among all-solid-state batteries, rechargeable Al-ion batteries have attracted most attention because they involve three-electron-redox reactions with high theoretic specific capacity. However, the solid Al-ion conductor electrolytes are less studied. Here, the microscopic path of Al3+-ion conduction of NASICON-type (Al0.2Zr0.8)20/19Nb(PO4)3 oxide is identified by temperature-dependent neutron powder diffraction and aberration-corrected scanning transmission electron microscopy experiments. (Al0.2Zr0.8)20/19Nb(PO4)3 shows a rhombohedral structure consisting of a framework of (Zr,Nb)O6 octahedra sharing corners with (PO4) tetrahedra; the Al occupy trigonal antiprisms exhibiting extremely large displacement factors. This suggests a strong displacement of Al ions along the c axis of the unit cell as they diffuse across the structure by a vacancy mechanism. Negative thermal expansion behavior is also identified along a and b axes, due to folding of the framework as temperature increases.

关键词: aluminum-ion battery, solid electrolyte, diffusion pathway, negative thermal expansion

Abstract:

Among all-solid-state batteries, rechargeable Al-ion batteries have attracted most attention because they involve three-electron-redox reactions with high theoretic specific capacity. However, the solid Al-ion conductor electrolytes are less studied. Here, the microscopic path of Al3+-ion conduction of NASICON-type (Al0.2Zr0.8)20/19Nb(PO4)3 oxide is identified by temperature-dependent neutron powder diffraction and aberration-corrected scanning transmission electron microscopy experiments. (Al0.2Zr0.8)20/19Nb(PO4)3 shows a rhombohedral structure consisting of a framework of (Zr,Nb)O6 octahedra sharing corners with (PO4) tetrahedra; the Al occupy trigonal antiprisms exhibiting extremely large displacement factors. This suggests a strong displacement of Al ions along the c axis of the unit cell as they diffuse across the structure by a vacancy mechanism. Negative thermal expansion behavior is also identified along a and b axes, due to folding of the framework as temperature increases.

Key words: aluminum-ion battery, solid electrolyte, diffusion pathway, negative thermal expansion

中图分类号:  (Solid state chemistry)

  • 82.33.Pt
82.45.Gj (Electrolytes) 82.45.Xy (Ceramics in electrochemistry)