New solid electrolyte to reduce the interface impedance mechanism and solid battery schematic
The next generation of lithium batteries for electric cars and cell phones will choose all-solid-state lithium-ion batteries with higher energy density and better safety. In order to speed up the R & D of new materials and all-solid-state lithium-ion batteries, the state first set up a national key R & D program of "Genome-wide Technology" during the "13th Five-Year Plan" period and hoped that through the high-throughput calculation, synthesis, detection and database Of the machine learning and intelligent analysis) new ideas and new technologies to accelerate the development of all-solid-state lithium-ion battery, the establishment of "all-solid-state battery based on material genome technology research and development," the state's key special, the focus of special by the Peking University Shenzhen Institute of New Materials Professor Pan Feng led the chief scientist organization 11 units to share. An important part of the research and development of the project includes the development of high performance all-solid-state lithium batteries and key materials (such as new solid electrolyte) and mechanisms (such as control of solid-state battery materials, etc.). Traditional inorganic ceramic electrolytes have the disadvantages of large interface impedance and poor matching with electrode materials, so it is hard to get large-scale application in the field of solid-state batteries at present. Therefore, the development of new solid-state electrolytes with small interface impedance has great influence on the energy density and electrochemical performance Ascension is of great importance.
Solid battery long cycle stability and cycle capacity at different temperatures
Professor Pan Feng's research group has made important progress recently in the research of new solid electrolyte and high energy density solid state battery. The Li-containing ionic liquid ([EMI0.8Li0.2] [TFSI]) is loaded as a guest molecule into the porous metal- In the organic framework material (MOF) nanoparticle carrier, a new composite solid electrolyte material was prepared. Among them, the lithium-containing ionic liquid is responsible for the lithium ion conduction, while the porous metal-organic framework provides the solid carrier and the ion transmission channel, avoids the risk of leakage of liquid lithium-ion batteries in the prior art, Inhibition, making lithium metal can be used directly as a solid battery cathode. The new solid electrolyte material not only has high bulk ionic conductivity (0.3mS cm-1), but also has excellent lithium-ion transport performance due to its unique nano-wetted effect. Electrode material particles have a good match between. Due to the above characteristics, the new solid electrolyte and solid state battery assembled with lithium iron phosphate positive electrode and lithium metal negative electrode can achieve extremely high electrode material loading (25 mg cm-2) and exhibit in the temperature range of -20-100 ° C. Good electrochemical performance.
Die Casting,Pressure Die Casting,High Pressure Die Casting,Low Pressure Casting
Suzhou Wint Electric Co., Ltd , https://www.winforthermal.com