| 초록 |
Many renewable energy sources such as solar, tidal, and wind energy are subject to variations in output with changing weather conditions. Consequently, a continuous supply of energy from such sources is problematic, resulting in a discrepancy between supply and demand. A technology that can store energy and convert it into a usable form when required is therefore imperative. The most well-known and commercialized lithium ion batteries (LIBs) are already used in portable electronic devices, but it is estimated that their future use will be extended to encompass electric vehicles (EV) or energy storage systems (ESS). However, the performance level of LIBs sold currently still falls short of the levels required for next generation EVs and ESS. In fact, batteries for such applications require approximately five times the currently available energy and power densities, along with also requiring a high stability. Consequently, many research institutes have strived to develop various high-capacity electrode materials in order to meet these requirements. Unfortunately, none have yet been able to successfully commercialize such materials owing to problems such as volume expansion, side reactions, and low electrical conductivity generated during charge and discharge processes. In order to improve the performance of high-capacity electrode materials, several groups are currently attempting to achieve a breakthrough by applying nanostructures and composites, along with research into the development of new processes to allow for cost minimization and mass production. Spray pyrolysis is a process for preparing particles or films by forming droplets from a precursor solution, then evaporating and decomposing them in a reactor. This process has proven to be quite useful for the preparation of multi-functional particles, with many reports into the effect of the main variables on particle formation. Thus, in this talk, I will present the various high capacity electrode materials synthesized by spray pyrolysis and its electrochemical performance. |
