Title: Sulfur and Nitrogen Co-Doped Graphene/PEDOT:PSS Hybrid Electrode for Highly Bendable Ionic Polymer Actuators
Name: Moumita Kotal, JaeHwan Kim, Il-Kwon Oh*
Korea Advanced Institute of Science and Technology (KAIST), Department of Mechanical Engineering, Daehak-ro 291 , Yuseong-gu, Daejeon 34141 , Republic of Korea
Electroactive ionic polymer (EAIP) actuators have received intensive attention in the field of soft electronics owing to their flexibility, lightweight, fast response, relatively large bending deformation. One of the most attractive EAIPs is an ionic polymer-metal composite (IPMC) actuator demonstrating several advantages, but they have some serious limitations : cracks in metal electrodes resulting in poor durability, the high cost of noble metals and the time-consuming process of electroless plating.Therefore, to overcome these difficulties, the development of high- performance ionic polymer actuators is highly desirable. Till date, heteroatom co-doped graphene has not yet been studied for an effective electrode towards high-performance ionic artificial muscles. Herein, we developed a highly effective sulfur and nitrogen co-doped graphene electrode for economically viable, highly durable and bendable ionic polymer actuators. We prepared flexible and conducting electrode using S and N co-doped microwave exfoliated reduced graphene oxide (Th-SNG) with polyethylenedioxythiophene (PEDOT):polystyrenesulfonate (PSS) and EMIM-BF4
embedded sulfonated polybenzimidazole (SPBI) as dry-type ionic polymer. The co-doped graphene exhibits 2.35% S and 4.89% N content. Moreover, Th-SNG with PEDOT:PSS provides efficient flexibility and remarkable improvement in capacitance (505 Fg-1), electrical conductivity (767 S cm-1) along with tensile strength (1.85 Gpa). Such electrochemically efficient electrode with mechanically stable SPBI-IL membrane facilitates an remarkably improved actuation performance:
large bending strain (up to 0.36% under 1V) and good durability. Taking the advantages of the flexibility, light weight, cost-effectiveness and durability of the actuator, we believe that our newly designed actuators can be used in the modern era of soft electronics.
Biography
Dr. Moumita Kotal has completed her PhD at the age of 28 years from Department of Chemistry, Indian Institute of Technology, Kharagpur and did her first postdoctoral work at IIT Patna, obtained industrial experience at SABIC for 1 year. She is now currently working as postdoctoral researcher at KAIST, Republic of Korea. Her working field is on materials chemistry especially development of graphene based electrode for ionic actuators, Li-ion battery applications, conducting polymers and polymer nanocomposites. She has published more than 16 papers in reputed journals and one book chapter.
Presenting author details Full name: Dr. Moumita Kotal Contact number: +821073691551 Twitter account: NA
Linked In account: https://www.linkedin.com/in/moumita-kotal-66b70792 Session name/ number: Graphene &2D/Carbon nanotubes
Category: (Oral presentation/ Poster presentation) Oral Presentation
