3.Research
1. Materials & Assembly
We study synthetic approaches to prepare functional materials including ion-conductive polymers, 2-dimensional nanomaterials, and carbon nanomaterials. In particular, we extensively study the assembly of those materials into multiscale structures, which are potentially applicable in electronic, wearable, and engineering applications.
Continuous Wet-spinning for Graphene Fibers and MXene Fibers
Fabrication of pure MXene fiber without binder and matrix have been ramained as a challenge. We fabricated pure MXene fiber with meter-long scale and the MXene fiber was highly electrical conductiive and strong.Nature Communications, 11, 2825 (2020)
Fabrication of Ultra-strong Fibers
ACS Nano, 15(8), 13055 (2021)
Dynamic Assembly of Colloid Nanoparticle
Science Advances, 4, eaau2104 (2018)
2. Materials for energy applications
Our aim is to prepare high-performance electrodes and electrolytes. Ion-conductive polymers are synthesized for solid-state batteries, and we are extensively studying the interface-engineering to improve cell performance. Various anode materials for LIB and NIB and fiber-based electrodes for supercapacitors are also designed.
Electrode Materials for Lithium Ion Battery
Adv. Funct. Mater., 26, 7605 (2016)
Supercapacitor Electrode Materials (MXene, graphene, metal oxides)
Chemical Engineering Journal, 436, 135041 (2022)Adv. Mater. Interfaces, 5, 1801361 (2018)
Fiber-type Energy Storage System for Wearable Applications
ACS Appl. Mater. Interfaces., 11, 9011 (2019)
Electrode Materials for Sodium Ion Battery
ACS Appl. Mater. Interfaces, 12, 23781 (2020)
3. Materials for ionic applications
We are developing the harvesting of electrical energy, signal transmission systems, and mechanically operatable devices by using the movement behavior of ions.
(1) Blue energy harvesting and water-treatment:
We generate electrical energy by using the evaporation of water as a clean energy source. We are newly synthesizing highly porous membranes for this emerging hydro-voltaic technology. In addition, we are studying a new technology to produce clean water by combing our porous membranes and heat-generating elements.
(2) Artificial nerve system:
Like the nerve system in human body, we are transferring the electrical and chemical signal by using our ionic cables, which are applicable in robotics and electronic devices, and wearable platform.
(3) Actuators:
we are studying ionic actuators, which are operated under specific conditions, such as light, temperatures, and pressures.
Transmission of Ionic Signal and Power with Nanochannel-based Ionic Cables
Science Advances, 4, eaau2104 (2018)
Generation of Blue Energy with Nanochannels
J. Mat. Chem. A, 7, 23727 (2019)
Evaportion of Water can generate Electricity
Chemical Engineering Journal, 430, 132759 (2022)
4. . Materials for thermal management
We are studying heat-dissipating and heat-generating materials. Developments of high-performance thermal interface materials (TIM) and new packing materials for underfill are the top priority of the semiconductor industry. We are developing highly thermal conductive TIMs and underfill materials by using our carbon-based nanomaterials and polymers. In addition, we are studying highly efficient heating elements for space-, military-, and automobile purposes. High-efficient heating is critical for energy-saving strategies in these areas.
Electrical Power Cables with low-heat Generation
Chemical Engineering Journal, 414, 128803 (2021)Carbon, 142, 230 (2019)