According to Anhui Daily reported (reporter Chen Wanwan) Recently, the University of Science and Technology of China Yao Hongbin research group, Li Zhenyu research group and Zhejiang University of Technology Tao Xinyong research group to design and develop a new family of lanthanide metal halide based solid electrolyte, lanthanide metal halide based solid electrolyte can achieve no electrode modification and room temperature can run all solid lithium metal battery. The results were published April 5 in the journal Nature.



Metal halide solid electrolytes exhibit better high voltage oxide positive electrode adaptation due to their wide electrochemical window, good room temperature conductivity and good deformability. Since 2018, all-solid-state lithium batteries based on some metal halide solid electrolytes have realized a long cycle of 4V-level positives such as lithium cobaltate, nickel, cobalt and manganese, which has attracted widespread attention in the industry. However, the development of new fast ion conductor frame structures that are stable to the lithium metal negative electrode has been a key challenge in the development of high specific energy all-solid-state lithium metal batteries.



In response to the above problems, the team members conducted scientific research. The final assembled all-solid-state lithium metal prototype battery can achieve more than 100 cycles at room temperature without additional common interface stabilization methods such as negative pad and positive electrode coating.



In addition, the team members also found that the lanthanide metal halide framework is extremely scalable, allowing some of its materials to have great potential to achieve higher interface stability, faster ion conduction, and cheaper feedstock costs through rational element design in the future.