China University Of Science And Technology Significantly Improves The Stability Of Lithium Batteries

- Apr 19, 2020-

China University of Science and Technology Significantly Improves the Stability Of Lithium Batteries

The mechanism of lithium ion conduction characteristics of metal halide perovskite framework. (Photo courtesy of China University of Science and Technology)


A reporter from learned from the University of Science and Technology of China on the 15th that the research team of Yao Hongbin and the associate researcher Zhang Guozhen of the School of Chemistry and Materials Science of the school had recently cooperated with external experts in the construction of metal halide perovskite lithium conductive layers and used to stabilize lithium metal Significant progress has been made in the research of batteries.

The result was recently published in "Nature · Newsletter".

The team of Yao Hongbin made full use of the advantages of the wide band gap of chlorine-based metal halide perovskite, good film formation, and simple preparation, etc., developed a gradient lithium conductive layer based on metal halide perovskite, and realized the metal lithium anode and electrolyte. Isolation greatly improves the cycle stability of lithium metal batteries.

As a new type of solution-processable ionic semiconductor material, metal halide perovskite has become a hot material in the field of optoelectronic research in recent years. However, there are few studies on the lithium ion conductivity characteristics and related applications within the framework of metal halide perovskite materials.

The researchers found that the metal chloride-based perovskite prepared by spin coating has the property of containing and transporting lithium ions. The researchers developed a convenient solid-phase transfer method to avoid the growth of lithium dendrites and the powdering of lithium metal electrodes.

Tests have shown that under the protection of the metal halide perovskite lithium conductive layer, the stability of the lithium battery is significantly improved.

It is reported that this work is the first attempt to apply the metal halide perovskite material to the lithium conductive layer at the interface of the lithium metal anode. The rich structure and stable frame of the metal halide will provide more advantages for the design of new solid electrolytes and the construction of high-performance lithium metal batteries. Multiple feasible ideas.