A new halospinel superionic conductor for high-voltage all solid state lithium batteries

被引：226
作者：
Zhou, Laidong [1 ,2 ]
Kwok, Chun Yuen [1 ,2 ]
Shyamsunder, Abhinandan [1 ,2 ]
Zhang, Qiang [3 ]
Wu, Xiaohan [4 ]
Nazar, Linda F. [1 ,2 ]
机构：
[1] Univ Waterloo, Dept Chem, 200 Univ Ave West, Waterloo, ON N2L 3G1, Canada
[2] Univ Waterloo, Waterloo Inst Nanotechnol, 200 Univ Ave West, Waterloo, ON N2L 3G1, Canada
[3] Oak Ridge Natl Lab, Neutron Scattering Div, Oak Ridge, TN 37830 USA
[4] BASF SE, D-67056 Ludwigshafen, Germany
来源：
ENERGY & ENVIRONMENTAL SCIENCE | 2020年 / 13卷 / 07期
基金：
加拿大自然科学与工程研究理事会;
关键词：
INTERFACE STABILITY; ELECTROLYTES; LI; PERFORMANCE; CATHODES; INSIGHTS; PHASE;
D O I：
10.1039/d0ee01017k
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We report a new Li-superionic chloride, Li2Sc2/3Cl4, that crystallizes in a disordered spinel structure, and exhibits an ionic conductivity of 1.5 mS cm(-1)with a low activation energy barrier for Li(+)ion diffusion of 0.34 eV. This material is the first spinel-type superionic halide. Structural elucidationviapowder neutron diffraction reveals a significantly disordered Li+-ion distribution over available tetrahedral and octahedral sites within the lattice, forming an infinitely 3D connected Li(+)ion diffusion pathway comprised of face-sharing octahedra and tetrahedra. Due to the high oxidative stability of Li2Sc2/3Cl4, all solid state lithium batteries employing Li(2)Sc(2/3)Cl(4)and high voltage cathodes (LiCoO2, LiNi(0.6)Mn(0.2)Co(0.2)O(2)or high-Ni LiNi0.85Mn0.1Co0.05O2) - without any coating - exhibit excellent electrochemical performance up to 4.6 V in terms of capacity retention and cycle life.
引用
收藏
页码：2056 / 2063
页数：8
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