Hydrophobic MAO/FSG coating based TENG for self-healable energy harvesting and self-powered cathodic protection

• Published in: Science China. Technological sciences Vol. 65; no. 3; pp. 726 - 734
• Main Authors: Liu, YuPeng, Sun, WeiXiang, Li, TingHua, Wang, DaoAi
• Format: Journal Article
• Language: English
• Published: Beijing Science China Press 01.03.2022; Springer Nature B.V
• Subjects: Cathodic coating (process); Cathodic protection; Corrosion; Corrosion prevention; Corrosion resistance; Corrosive wear; Energy harvesting; Engineering; Fluorination; Fluorine; Hydrophobicity; Organic coatings; Oxidation; Protective coatings; Self healing materials; Sol-gel processes; Wear resistance; triboelectric nanogenerator; organic/inorganic hybrid coating; corrosion resistance; self-healing property; energy collection
• ISSN: 1674-7321; 1869-1900
• DOI: 10.1007/s11431-021-1943-8

An organic/inorganic hybrid coating with self-healable hydrophobicity is prepared as triboelectrical layer by micro-arc oxidation (MAO) and fluorinated sol-gel (FSG) coating. The MAO/FSG hybrid coating-based TENG (MF-TENG) has a current output of 31 µA and voltage output of 870 V, which is eight times that of the MAO based TENG. Compared with organic coating, the organic/inorganic hybrid coating has good wear resistance. When the fluorine composition on the surface of the coating is damaged, the self-healing hydrophobicity and electrical output are achieved by transferring loaded perfluorosilane to the damaged surface. The fluorinated sol-gel coating is hydrophobic, which ensures that the coating has good corrosion resistance. Also, the electricity generated in triboelectrification could improve the anti-corrosion performance by cathodic protection. Based on the anti-corrosion, anti-wear and self-healing properties, the MF-TENG has potential applicability in the field of energy collection, energy supply, and corrosion protection.