Polydopamine–cellulose nanofiber composite for flexible electrode material. (12th February 2021)

• Record Type: Journal Article
• Authors: Muthoka, Ruth M; Roy, Sunanda; Kim, Hyun Chan; Yoon, Hargsoon; Zhai, Lindong; Kim, Jaehwan
• Is Part Of: Smart materials and structures. Volume 30:Number 3(2021)
• Publication Date: 2021-02-12
• Subjects: cellulose -- polydopamine -- electrode -- microfabrication -- flexible; Smart materials -- Periodicals; Strucural design -- Periodicals; 620.11
• DOI: 10.1088/1361-665X/abe184
• Languages: English
• ISSNs: 0964-1726

Abstract

Abstract: This research is intended to develop a flexible and dopamine-based electrode material by blending polydopamine (PDA) with cellulose nanofiber (CNF). Inspired by its unique adhesion behavior, dopamine, a biomimetic protein, was utilized to form a strong adhesion between the CNFs. Herein, we report PDA concentration's effect to produce PDA-CNF composite showing good electrochemical redox response, good mechanical properties, and improved thermal stability. The PDA-CNF composite with CNF:PDA = 5:2.5 showed the highest Young's modulus, the strain at break, and toughness among other CNF:PDA combination composites. A PDA-CNF working electrode was made using a microfabrication process. Cyclic voltammetry analysis showed high ion permeability through the CNF backbone structure and oxidation process by PDA in PDA-CNF electrode. These findings indicate the feasibility of the PDA-CNF composite for enhanced longevity in flexible electrode applications utilizing the combination of high mechanical flexibility and thermal stability.