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Boosting the Power Output of a Cement-Based Triboelectric Nanogenerator by Enhancing Dielectric Polarization with Highly Dispersed Carbon Black Nanoparticles toward Large-Scale Energy Harvesting from Human Footsteps
journal contribution
posted on 2022-03-25, 15:07 authored by Saman Kuntharin, Viyada Harnchana, Annop Klamchuen, Kitiphat Sinthiptharakoon, Prasit Thongbai, Vittaya Amornkitbamrung, Prinya ChindaprasirtA strategy
to enhance the energy conversion performance of a cement-based
triboelectric nanogenerator (TENG) has been proposed for large-scale
energy harvesting from human footsteps. A cement-carbon black (CB)
composite is fabricated by incorporating CB nanoparticles with a hydroxyethyl
cellulose (HEC) admixture and used as a triboelectric material for
TENG. The fabricated cement-CB@HEC TENG exhibits a 13-fold enhancement
of the electrical output with the highest power density of 2.38 W/m2. The tremendous improvement is ascribed to a good dispersion
of conductive CB nanoparticles in the cement matrix, which is key
for achieving a high dielectric constant that is required to intensify
the triboelectric charge density of TENG. Moreover, it was found that
the addition of the HEC admixture plays a crucial role in not only
providing a good dispersion of CB for generating dielectric polarization
but also facilitating the development of a microstructure and crystallization
of cement hydration products to reduce the formation of air voids
and micropores. These factors synergistically contribute to the improved
dielectric constant and compressive strength of the cement-CB@HEC
composite. This remarkable strategy presents great prospects for the
development of smart cement materials for realizing applications in
large-scale energy harvesting toward sustainable, clean, and renewable
energy sources.
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Keywords
scale energy harvestingrenewable energy sourcesimproved dielectric constanthigh dielectric constantgenerating dielectric polarizationfactors synergistically contributeenhancing dielectric polarizationenergy conversion performancetriboelectric charge densitybased triboelectric nanogeneratorhighest power densityincorporating cb nanoparticlesconductive cb nanoparticlessmart cement materialscement hydration productshec teng exhibitshec admixture playstriboelectric materialpower outputcement matrixtremendous improvementrealizing applicationshydroxyethyl cellulosehuman footstepsgood dispersionfold enhancementelectrical outputcrucial rolecompressive strengthcarbon blackalso facilitatingair voids38 w