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New solid electrolytes are expected to provide cheaper and better all solid-state lithium batteries

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2023-11-10 19:06

New solid electrolytes are expected to provide cheaper and better all solid-state lithium batteries
New solid electrolytes are expected to provide cheaper and better all solid-state lithium batteries

Researchers from the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences (CAS) designed a new material to make all solid state lithium (Li) batteries cheaper but more efficient. The article was published in the journal Nature Communications on July 20.

Solid electrolytes are crucial for achieving safe and high-energy all solid-state lithium batteries. Among different types of solid electrolytes, it has recently been found that chloride solid electrolytes exhibit ideal characteristics of sulfide and oxide systems, including high ionic conductivity, deformability, and oxidation stability. The rare combination of these advantages quickly sparked widespread interest. However, two issues make the large-scale production of these attractive solid electrolytes extremely challenging: expensive raw materials and low humidity tolerance.

The team designed and synthesized the material Li2ZrCl6 (LZC). It retains all the advantages of chloride solid electrolytes while exhibiting lower material costs and excellent moisture resistance.

fifty μ The raw material cost of LZC with a thickness of m is only 1.38 US dollars/m2, which is far lower than the cheapest chloride system in the literature (23.05 US dollars/m2) and far below the threshold of 10 US dollars/m2 to ensure the cost competitiveness of all solid-state batteries. In addition, LZC is stable in an atmosphere with a relative humidity of 5%, so there is no longer a need for strict atmosphere requirements during synthesis and storage like sulfide solid electrolytes.

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