• Corpus ID: 173990773

Superlubricity-Based Electrostatic Microgenerators

  title={Superlubricity-Based Electrostatic Microgenerators},
  author={Xuanyu Huang1 and Li Lin1 and Quanshui Zheng1},
Although electrostatic microgenerators (ESMGs) have promised for nearly two decades extensive applications in wireless, self-powered microscale devices and sensors for security, personal health systems, communication, infrastructure and environmental monitoring, commercialized ESMGs are still scarce, mainly due to very low current densities and short product life for most applications. Here we demonstrate that a combination of structural superlubricity, a state of nearly zero friction and wear… 

Figures from this paper


Superlubricity in centimetres-long double-walled carbon nanotubes under ambient conditions.
It is shown that superlubricity can be realized in centimetres-long double-walled carbon nanotubes (DWCNTs) under ambient conditions, with an intershell friction lower than 1 nN that is independent of nanotube length.
Sliding-triboelectric nanogenerators based on in-plane charge-separation mechanism.
This paper demonstrated a newly designed TENG based on an in-plane charge separation process using the relative sliding between two contacting surfaces, providing a new mode of TENGs with diverse applications with high efficiency, easy fabrication, and suitability for many types of mechanical triggering.
Analytical modeling and optimization of electret-based microgenerators under sinusoidal excitations
Small scale electrostatic energy harvesters or microgenerators have attracted much interest due to their compatibility with micro-electro-mechanical-system (MEMS) fabrication processes and the
Structural superlubricity and ultralow friction across the length scales
The phenomenon of ultralow friction between sliding incommensurate crystal surfaces—structural superlubricity—is examined, and the challenges and opportunities involved in its extension to the macroscale are assessed.
Robust triboelectric nanogenerator based on rolling electrification and electrostatic induction at an instantaneous energy conversion efficiency of ∼ 55%.
An instantaneous energy conversion efficiency of up to 55% was demonstrated and the high durability of the device was confirmed, presenting a substantial advancement of the triboelectric nanogenerators toward large-scope energy harvesting and self-powered systems.
Macroscale superlubricity enabled by graphene nanoscroll formation
Simulations showed that sliding of the graphene patches around the tiny nanodiamond particles led to nanoscrolls with reduced contact area that slide easily against the amorphous diamondlike carbon surface, contributing to superlubricity at engineering scale.
Observation of microscale superlubricity in graphite.
It is shown how the grain structure of highly oriented pyrolitic graphite determines the probability of self-retraction, and the robustness of the phenomenon opens the way for practical applications of superlubricity in micromechanical systems.
Robust microscale superlubricity in graphite/hexagonal boron nitride layered heterojunctions
Robust structural superlubricity is experimentally realized in microscale monocrystalline graphite/hBN heterojunctions and the friction anisotropy upon crystal reorientation is orders of magnitude smaller than that of homogeneous graphite contacts.
A high-performance micro electret power generator based on microball bearings
In this paper, a high-performance micro electret power generator fabricated by simple bulk micromachining technology is presented. It has microballs as movable bearings for harvesting changing
Liquid‐Metal Electrode for High‐Performance Triboelectric Nanogenerator at an Instantaneous Energy Conversion Efficiency of 70.6%
Harvesting ambient mechanical energy is a key technology for realizing self‐powered electronics, which has tremendous applications in wireless sensing networks, implantable devices, portable