A cost-effective and humidity-tolerant chloride solid electrolyte for lithium batteries

Kai Wang, Qingyong Ren, Zhenqi Gu, Chaomin Duan, Jinzhu Wang, Feng Zhu, Yuanyuan Fu, Jipeng Hao, Jinfeng Zhu, Lunhua He, Chin-Wei Wang, Yingying Lu, Jie Ma and Cheng Ma ()
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Kai Wang: University of Science and Technology of China
Qingyong Ren: Shanghai Jiao Tong University
Zhenqi Gu: University of Science and Technology of China
Chaomin Duan: University of Science and Technology of China
Jinzhu Wang: University of Science and Technology of China
Feng Zhu: University of Science and Technology of China
Yuanyuan Fu: University of Science and Technology of China
Jipeng Hao: University of Science and Technology of China
Jinfeng Zhu: Shanghai Jiao Tong University
Lunhua He: Chinese Academy of Sciences
Chin-Wei Wang: Neutron Group, National Synchrotron Radiation Research Center
Yingying Lu: Zhejiang University
Jie Ma: Shanghai Jiao Tong University
Cheng Ma: University of Science and Technology of China

Nature Communications, 2021, vol. 12, issue 1, 1-11

Abstract: Abstract Li-ion-conducting chloride solid electrolytes receive considerable attention due to their physicochemical characteristics such as high ionic conductivity, deformability and oxidative stability. However, the raw materials are expensive, and large-scale use of this class of inorganic superionic conductors seems unlikely. Here, a cost-effective chloride solid electrolyte, Li2ZrCl6, is reported. Its raw materials are several orders of magnitude cheaper than those for the state-of-the-art chloride solid electrolytes, but high ionic conductivity (0.81 mS cm–1 at room temperature), deformability, and compatibility with 4V-class cathodes are still simultaneously achieved in Li2ZrCl6. Moreover, Li2ZrCl6 demonstrates a humidity tolerance with no sign of moisture uptake or conductivity degradation after exposure to an atmosphere with 5% relative humidity. By combining Li2ZrCl6 with the Li-In anode and the single-crystal LiNi0.8Mn0.1Co0.1O2 cathode, we report a room-temperature all-solid-state cell with a stable specific capacity of about 150 mAh g–1 for 200 cycles at 200 mA g–1.

Date: 2021
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DOI: 10.1038/s41467-021-24697-2

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