Acid-Doped Pyridine-Based Polybenzimidazole as a Positive Triboelectric Material with Superior Charge Retention Capability

Abstract

The energy conversion efficiency of a triboelectric nanogenerator (TENG) is severely limited by the charge density of triboelectric materials, while drastic and unavoidable charge decay happens during contact due to the insufficient charge retention capacity of positive triboelectric materials. Here, elaborately synthesized acid-iondoped pyridine-based polybenzimidazole processing with strong charge retention capability is demonstrated to couple with negatively corona-polarized electrets. As illustrated by thermal stimulation and an ion mass spectrometer, the formation of acid-ion chimerism processes high activation energy for stored charges, and the selective anion migration can compensate the escape of polarized charge. Accordingly, the charge density can reach up to 596 μC m −2 and the charge retention rate reaches 49.7%, which is so far the highest intrinsic charge density obtained in the open air. Thus, the ionic chimerism strategy provides an effective way to suppress the charge escaping in the open air and gives a great expandable avenue for the material challenges of TENG's practical deployment.

Highly Tribo-Positive Nylon-11 Film Fabricated by Multiscale Structural Regulation through a Roll-to-Roll Processing

“…To the best of our knowledge, many researchers have explored and maximized transferred charge density of triboelectric materials by optimizing the processing methodology. , As investigated in our previous work, ,− the processing and molding techniques have great effect on the crystal structure and surface state of the polymer film, which directly affect the generation, accumulation, and retainment of triboelectric charges during the film friction process. The dramatically growing application of TENG in fields such as self-powered sensors, ocean wave energy harvesting, and human–machine interaction has created an urgent need for flexible positive triboelectric materials.…”

Contact-electro-catalysis under natural and industrial conditions: mechanisms, strategies, and challenges

“…For example, a triboelectric nanogenerator (TENG) gathers mechanical energy generated by various frictional motions on various interfaces by utilizing the triboelectric effect. 5,6 Due to their use of a wide selection of materials, small size, environmental sustainability, and high power density, TENGs can collect energy from a wide range of environmental sources for power generation. Therefore, they can be applied to self-powered sensors, which is a popular research topic in the Internet of Things.…”