Chin. Phys. Lett.  2022, Vol. 39 Issue (2): 028201    DOI: 10.1088/0256-307X/39/2/028201
Wet Mechanical Milling Induced Phase Transition to Cubic Anti-Perovskite Li$_{2}$OHCl
Di-Xing Ni1†, Yao-Dong Liu1†, Zhi Deng1, Dian-Cheng Chen1, Xin-Xin Zhang2, Tao Wang3, Shuai Li1*, and Yu-Sheng Zhao1
1Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen 518055, China
221C Innovation Laboratory, Contemporary Amperex Technology Ltd. (CATL), Ningde 352100, China
3Guangdong–Hong Kong–Macao Joint Laboratory for Neutron Scattering Science and Technology, Dongguan 523803, China
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Di-Xing Ni, Yao-Dong Liu, Zhi Deng et al  2022 Chin. Phys. Lett. 39 028201
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Abstract Anti-perovskite solid-state electrolyte Li$_{2}$OHCl usually exhibits orthorhombic phase and low ionic conductivity at room temperature. However, its ionic conductivity increases greatly when the temperature is up to 40 ℃, while it goes through an orthorhombic-to-cubic phase transition. The cubic Li$_{2}$OHCl with high ionic conductivity is stabilized at room temperature and even lower temperature about 10 ℃ by a simple synthesis method of wet mechanical milling. The cubic Li$_{2}$OHCl prepared by this method performs an ionic conductivity of $4.27 \times 10^{-6}$ S/cm at room temperature, about one order of magnitude higher than that of the orthorhombic Li$_{2}$OHCl. The phase-transition temperature is decreased to around 10 ℃. Moreover, it can still remain cubic phase after heat treatment at 210 ℃. This work delivers a huge potential of fabricating high ionic conductivity phase anti-perovskite solid-state electrolyte materials by wet mechanical milling.
Received: 29 October 2021      Published: 29 January 2022
PACS:  81.20.Wk (Machining, milling)  
  82.47.Aa (Lithium-ion batteries)  
  82.45.Aa (Electrochemical synthesis)  
  82.20.Db (Transition state theory and statistical theories of rate constants)  
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Di-Xing Ni
Yao-Dong Liu
Zhi Deng
Dian-Cheng Chen
Xin-Xin Zhang
Tao Wang
Shuai Li
and Yu-Sheng Zhao
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