2019/6/18 Key Materials and Interface Design of Solid State Lithium Batteries
2019-03-02
Abstract: Liu Hongtao, professor/deputy director of Institute of Chemical Power Supply and Materials, School of Chemistry and Chemical Engineering, Central South University, said that solid-state batteries have a long way to go. In general, attention should be paid to reducing material costs, developing high conductivity electrolytes, optimizing and stabilizing solid-state electrode/electrolyte interface and integrated integration.
"At present, the solid-state battery products, in terms of performance, have basically failed to achieve the performance of the existing mainstream liquid lithium batteries." According to Liu Hongtao, solid-state lithium batteries have many advantages, such as higher safety, simpler structure and higher energy density. However, there are many problems in solid-state batteries, such as volume change of positive and negative materials, irreversible reaction, lithium dendrite and so on, which lead to low power density, poor conductivity and stability.
Liu Hongtao believes that the following improvements can be made: constructing lithium ion channels with more adjacent tetrahedral skeleton structures, increasing the radius of ligand ions appropriately without destroying the structure to reduce the activation energy of lithium ion migration, optimizing the proportion of constituent elements or partial element substitution, which can change the conductivity by orders of magnitude, and utilizing flexible solid polymers. The electrolyte fills the gap between the cathode and electrolyte interface.
Overall, solid-state batteries have a long way to go. Attention should also be paid to reducing material costs, developing high conductivity electrolytes, optimizing and stabilizing the solid-state electrode/electrolyte interface and integrating them.
(The above information has not been reviewed by the speaker himself, for reference only.)
Issued by Tom, M&S, Jun. 18, 2019.
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