Organic-Inorganic Composite Separator for Improving the Life Cycle Characteristics of Lithium-Sulfur Batteries

摘要

Lithium-ion batteries (LIBs) have been widely used in many industries in recent years. In particular, the electrical vehicles (EVs) and energy storage system (ESS) markets are growing rapidly, and the requirements for LIBs are also growing. Under these circumstances, the active materials for LIBs that have been used are insufficient in various aspects. The most important characteristics of newly requested LIBs are economics and capacity. Until now, the industry sector where LIBs were mainly used was mainly devices with relatively small size and output, such as portable electronic devices. Therefore, if a certain level of capacity was secured in LIBs, there was no demand for an extremely large-capacity battery. However, due to changes in the industry, devices that require high power and long-term use, such as EVs and ESS, have emerged as new demands, and the requirements of LIBs have gradually changed to emphasize the capacity side. The cathode active materials used in commercially available LIBs are mostly metal oxides containing rare metals such as nickel and cobalt. These metal oxide-based cathode active materials have a relatively low theoretical capacity, unstable supply, and low production. So the price fluctuation is very high and the price is also very expensive. Anode has also been sideways for decades without significant changes in capacity since LIBs were commercialized, and new attempts at the active material level are needed. Research to introduce a new active material to secure these shortcomings has become more active in recent years.