| 초록 |
Although the commercial lithium ion battery based on a liquid electrolyte has proven to be an efficient energy storage system, its energy density will reach uppermost limit, and using liquid electrolytes can also cause safety issues such as inflammability, fire, and explosion. Solid polymer electrolytes could offer a perfect solution to substitute for liquid electrolytes owing to their low flammability and good electrochemical stability. We have synthesized silica-based single-ion conducting nanoparticles, where anions are attached to the silica nanoparticle, thereby allowing only lithium cations to be mobile, by a sol-gel reaction. The nanoparticles, having a high surface area and a mesoporous structure, are then embedded into a polymer matrix, allowing for the development of solid composite polymer electrolytes. The effect of nanoparticles on ionic conductivity and mechanical properties are reported using dielectric spectroscopy and oscillatory shear. |
