Carbon fiber-reinforced thermoplastics

Owing to the many advantages of carbon fiber, such as its high strength, good electrical conductivity and light weight, carbon fiber-reinforced thermoplastics (CFRTPs) have been used in a variety of applications. However, there are some challenges in their manufacturing technology and improvement of interfacial properties between the fiber and matrix. To solve this problem, we are developing a novel manufacturing process, surface treatment technologies, and related experimental methods to achieve reliable material properties of the CFRTPs.

Composite structural analysis and design

Polymer-based fibrous composites are materials that are characterized by high specific stiffness, high specific strength, and low weight compared to metals. We are developing composite machine components for the application fields of automobiles, aerospace, shipbuilding, and machine tools through the use of computational design and qualification tests.

Energy conversion and storage systems

The proton exchange membrane fuel cells (PEMFCs), also known as polymer electrolyte membrane fuel cells, are an eco-friendly energy conversion system (ECS) that uses only hydrogen and oxygen to produce electricity. The vanadium redox flow battery (VRFB) is a very promising energy storage system (ESS) to effectively store large amounts of electricity. We have focused on improving the performance of ECS and ESS systems by developing important components such as bipolar plates and electrodes.

Smart Materials

Functional composite materials have received attention owing to their special properties, such as piezoelectric, electro-rheological, dielectric, thermoelectric, and so on. Optimized material properties can be achieved by complementing more than two distinct materials. These functional composite materials have been used in various applications, such as wearable devices and smart sensors. Currently, we are developing novel CNT/polymer composite fiber sensors with high mechanical and electrical properties for health monitoring of composite structures. In addition, we investigate 3-dimensional thermoelectric devices for recycling waste heat and flexible piezoelectric composite film for mobile devices.