In 2023, USTC developed a new type of all-solid-state lithium battery electrolyte
University of Science and Technology of China
The University of Science and Technology of China has developed a new type of all-solid-state lithium battery electrolyte with excellent performance and low cost.
News on July 3, according to Chinanews.com, a new study by the University of Science and Technology of China has made a breakthrough in the field of all-solid-state lithium batteries.
Professor Ma Cheng of the school has developed a new type of solid-state electrolyte.
Its performance Both the price and cost are superior to the current similar products, which provides a new possibility for the industrial application of all-solid-state lithium batteries.
All-solid-state lithium battery is a lithium battery that uses solid electrolyte instead of liquid electrolyte.
It has the advantages of high safety, high energy density, and long cycle life.
It is considered to be a disruptive technology in the field of new energy vehicles and energy storage in the future.
However, the core challenge of current all-solid-state lithium batteries is how to find a solid-state electrolyte material that can not only ensure efficient conduction of lithium ions, but also achieve good deformability and low cost.
After years of research, the team of Professor Ma Cheng from the University of Science and Technology of China discovered a new type of oxychloride solid-state electrolyte—lithium zirconium oxychloride, whose overall performance is comparable to that of the most advanced sulfide and chloride solid-state electrolytes.
Its room temperature ionic conductivity is as high as 2.42 millisiemens per centimeter, which exceeds the 1 millisiemens per centimeter required for applications, and ranks among the top among all kinds of solid electrolytes reported so far.
At the same time, its good deformability enables the material to reach 94.2% densification under a pressure of 300 MPa, which can well meet the application requirements, and is also superior to sulfide and chloride solid electrolytes (equal to less than 90% dense under pressure).
More importantly, its raw material cost is only 7 US dollars (currently about 51 RMB) per kilogram, which is far lower than the current most cost-effective solid-state electrolyte lithium zirconium chloride (10.78 US dollars per kilogram), and less than sulfide and 4% of rare earth-based, indium-based chloride solid electrolytes.
This achievement has been published in the international authoritative journal “Nature Communication”.
The reviewer believes that this discovery is “very innovative and original”, and believes that the lithium zirconium oxychloride material is “very promising” and “beneficial to Commercialization of solid-state battery technology”.
All-solid-state lithium battery
Experiments have proved that the all-solid-state lithium battery composed of lithium zirconium oxychloride and high-nickel ternary positive electrode has demonstrated excellent performance: under the condition of fast charging for 12 minutes, the battery still successfully cycles at room temperature for more than 2000 cycles.
Although QuantumScape Corporation of the United States, Nissan Motor, and BMW Group have all officially announced that they have successfully developed all-solid-state batteries.
They still suffer from high manufacturing costs and cannot be put into mass production.
Although Nissan announced that the first-generation all-solid-state batteries will be trial-produced in 2025.
It will be installed in 2028, but it still has to face the challenge of manufacturing costs.
This time, the new discovery of USTC will undoubtedly shake the industry again!
According to the researchers, lithium zirconium oxychloride is a solid-state electrolyte material with great potential and application value.
It can achieve performance similar to or even surpassing that of the most advanced solid-state electrolyte at a very low cost.
It is important for promoting the development of all-solid-state lithium batteries Industrialization development is of great significance.
The editor believes that this discovery is “very innovative and original”, and believes that the lithium zirconium oxychloride material is “very promising” and “beneficial to the commercialization of solid-state battery technology.”
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