Triboelectric Nanogenerators Assembled by Cobalt(II) Coordination Polymer Incorporated Composite Films and their Application for Self‐Powered Anticorrosion

Abstract A friction layer with stability and durability is important to promote the practical application of triboelectric nanogenerators (TENGs). In this work, a two‐dimensional cobalt coordination polymer ( Co‐CP ) was successfully synthesized using cobalt nitrate, 4,4′,4′′‐tricarboxyltriphenylamine and 2,2′‐bipyridine. To clearly clarify the effect of the doping proportions of Co‐CP and the types of composite polymers on the output performance of the TENG, Co‐CP was combined with two organic polymers having different polarities (polyvinylidene fluoride (PVDF) and ethyl cellulose (EC)) to form a series of composite films, which were used as the friction electrode materials to fabricate TENGs. Electrical characterizations indicated that a high output current and voltage were obtained from the TENG based on 15 wt.% Co‐CP incorporated in PVDF ( Co‐CP @PVDF), which could be further improved by the Co‐CP @EC composite film at the same doping ratio. Furthermore, the optimally fabricated TENG was demonstrated to prevent electrochemical corrosion of carbon steel.