Effects of liquid metal particles on performance of triboelectric nanogenerator with electrospun polyacrylonitrile fiber films

Expanding the portfolio of tribo-positive materials: Aniline formaldehyde condensates for high charge density triboelectric nanogenerators

“…It should be noted that the KPFM measurements reported were undertaken with the backside electrode of the AFR film grounded. After each set of cycles (10,20, 30 and so on), the backside electrode was grounded before the KPFM experiment was initiated. When the grounding was not provided, a typical increase of about 200 mV in the surface potential of the AFR film was observed in both cycled and uncycled state (see Fig.…”

“…The commonly reported vertical contact mode TENGs typically consist of a combination of dielectric/dielectric or dielectric/metal, with significant differences in their ability to donate (tribo-positive) or accept electrons (tribo-negative). For these TENG systems, the increase in the output power and surface charge density is achieved via: (i) judicious selection of tribomaterials [8], (ii) surface micro-/nano-structuring [9,10], surface chemistry modification [11], (iii) charge injection [6] or composites with high-polarization piezoelectric additives [5,7,12] and (iv) physical hybridization of multiple energy harvesting technologies [13]. Except for the judicious use of tribo-materials, the rest of the methods are reliant on expensive equipment and complicated processing steps including lithography etc.…”

Carbon-containing electrospun nanofibers for lithium–sulfur battery: Current status and future directions

“…The basic principle of electrospinning is based on the uniaxial elongation of electrospinning solution that consists of organic polymer and corresponding solvent. Organic polymers include polyacrylonitrile (PAN) [40,[59][60][61], poly(vinylidene fluoride) (PVDF) [62], poly (methyl methacrylate) (PMMA) [63][64][65], poly (vinyl pyrrolidone) (PVP) [63,65,66], poly (vinyl alcohol) (PVA) [67][68][69], polyimide (PI) [70], polytetrafluoroethylene (PTFE) [71], polystyrene (PS) [72] or mixtures of the above polymers. These organic polymers are generally dissolved in one or more solvents, such as N, N-dimethylformamide (DMF), dimethyl sulfoxide (DMSO), tetrahydrofuran (THF), ethanol (EtOH), mineral oil or water.…”

Comparison of applied torque and energy conversion efficiency between rotational triboelectric nanogenerator and electromagnetic generator

“…Compared with the traditional energy supply by using chemical battery, energy harvesting technology is a more effective way by converting ambient mechanical energy into electric power ( Gao et al., 2020 ; Guo et al., 2016 ; Shao et al., 2018b ; Xie et al., 2014 ; Xu et al., 2019 ). Nowadays, triboelectric nanogenerator (TENG) has attracted growing attention due to its simple structure( Wang et al., 2014 ; Ye et al., 2019 ; Zhang et al., 2019a , 2019b ), high power density, low cost, high flexibility ( Liu et al., 2020 ; Wang et al., 2020a ), and abundant selection of materials ( Li et al., 2020 ; Wang et al., 2020b ; Yan et al., 2020 ; Zheng et al., 2020 ). Derived from the second term in Maxwell's displacement current ( Akande and Lowell, 1985 ; Wang, 2017 ), the TENG has been widely used in micro/nanopower sources ( Seung et al., 2015 ; Tayyab et al., 2020 ; Xiong et al., 2019 ), self-powered sensing ( Jin et al., 2017 ; Khan et al., 2017 ; Wu et al., 2016 ), blue energy ( Shao et al., 2018a ; Wang et al., 2016 ), and high voltage sources ( Bui et al., 2019 ; Li et al., 2017 ; Xia et al., 2019 ) since its first invention in 2012 ( Fan et al., 2012 ).…”