Abstract
Understanding the relationship between structure, ionic conductivity, and synthesis is the key to the development of superionic conductors. Here, a series of Li3-3xM1+xCl6 (−0.14 < x ≤ 0.5, M = Tb, Dy, Ho, Y, Er, Tm) solid electrolytes with orthorhombic and trigonal structures are reported. The orthorhombic phase of Li–M–Cl shows an approximately one order of magnitude increase in ionic conductivities when compared to their trigonal phase. Using the Li–Ho–Cl components as an example, their structures, phase transition, ionic conductivity, and electrochemical stability are studied. Molecular dynamics simulations reveal the facile diffusion in the z-direction in the orthorhombic structure, rationalizing the improved ionic conductivities. All-solid-state batteries of NMC811/Li2.73Ho1.09Cl6/In demonstrate excellent electrochemical performance at both 25 and −10 °C. As relevant to the vast number of isostructural halide electrolytes, the present structure control strategy guides the design of halide superionic conductors.
Original language | English |
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Article number | 2103921 |
Journal | Advanced Energy Materials |
Volume | 12 |
Issue number | 21 |
DOIs | |
State | Published - Jun 2 2022 |
Funding
J.L., E.v.d.M., and J.L. contributed equally to this work. This research was supported by the Natural Sciences and Engineering Research Council of Canada (NSERC), Canada Research Chair Program (CRC), Canada Foundation for Innovation (CFI), GLABAT Solid‐State Battery Inc., China Automotive Battery Research Institute Co. Ltd, Ontario Research Fund, the Canada Light Source at University of Saskatchewan (CLS), Interdisciplinary Development Initiatives (IDI) by Western University, Canada MITACS fellow, and University of Western Ontario. Financial support was greatly acknowledged from the Netherlands Organization for Scientific Research (NWO) under the VICI Grant No. 16122. The authors also appreciate the help of the beamline scientist of HXMA (Dr. Weifeng Chen) and SXRMB (Dr. Mohsen Shakouri, Dr. Qunfeng Xiao, and Dr. Alisa Paterson) beamline at Canadian Light Source. The authors thank the UK Science and Technology Facilities Council (STFC) for provision of Xpress Access neutron beamtime at ISIS. [ 59 ] J.L., E.v.d.M., and J.L. contributed equally to this work. This research was supported by the Natural Sciences and Engineering Research Council of Canada (NSERC), Canada Research Chair Program (CRC), Canada Foundation for Innovation (CFI), GLABAT Solid-State Battery Inc., China Automotive Battery Research Institute Co. Ltd, Ontario Research Fund, the Canada Light Source at University of Saskatchewan (CLS), Interdisciplinary Development Initiatives (IDI) by Western University, Canada MITACS fellow, and University of Western Ontario. Financial support was greatly acknowledged from the Netherlands Organization for Scientific Research (NWO) under the VICI Grant No. 16122. The authors also appreciate the help of the beamline scientist of HXMA (Dr. Weifeng Chen) and SXRMB (Dr. Mohsen Shakouri, Dr. Qunfeng Xiao, and Dr. Alisa Paterson) beamline at Canadian Light Source. The authors thank the UK Science and Technology Facilities Council (STFC) for provision of Xpress Access neutron beamtime at ISIS.[59]
Keywords
- all-solid-state Li batteries
- energy storage
- halides
- solid-state electrolytes
- superionic conductors