Lithium ion batteries dominate the consumer electronics and electric vehicle markets due to their relatively high energy density, long cycle life, small memory effect, and low self-discharge. However, due to the low voltage platform of the graphite anode, lithium dendrites are easily formed during the battery cycle, increasing the risk of short circuit. Furthermore, the organic liquid electrolyte in the conventional lithium ion battery is flammable, resulting in serious safety problems. Therefore, solid-state batteries with inorganic solid electrolytes or polymer electrolytes have attracted increasing attention due to their non-combustibility and high safety. Among them, polymer electrolyte batteries based on higher ionic conductivity are more suitable for practical applications.
Recently, the research team has successfully developed a highly efficient flexible dual ion battery based on modified gel polymer electrolyte. This new gel polymer electrolyte exhibits a three-dimensional porous network structure and has a high ionic conductivity (2.1 × 10-3 S cm-1). The results show that the new dual-ion battery based on the gel electrolyte has excellent rate performance and cycle stability: At a high average discharge voltage of 4.0V, the capacity retention rate of the battery after 2000 charge and discharge cycles is as high as 92% at a rate of 5C. In addition, the battery also has good flexibility and thermal stability, and can still work normally at temperatures up to 90 °C. Related research results were published in the international energy materials authoritative journal "Advanced Energy Materials" (Adv. Energy Mater. 2018). The research results have received attention reports from the power battery network and other media.
Some media reports on related research results
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