The energy efficiency of KAIST’s piezoelectric nanogenerator has increased by almost 40 times, one step closer toward the commercialization of flexible energy harvesters that can supply power infinitely to wearable, implantable electronic devices
NANOGENERATORS are innovative self-powered energy harvesters that convert kinetic energy created from vibrational and mechanical sources into electrical power, removing the need of external circuits or batteries for electronic devices. This innovation is vital in realizing sustainable energy generation in isolated, inaccessible, or indoor environments and even in the human body.
Nanogenerators, a flexible and lightweight energy harvester on a plastic substrate, can scavenge energy from the extremely tiny movements of natural resources and human body such as wind, water flow, heartbeats, and diaphragm and respiration activities to generate electrical signals. The generators are not only self-powered, flexible devices but also can provide permanent power sources to implantable biomedical devices, including cardiac pacemakers and deep brain stimulators.
However, poor energy efficiency and a complex fabrication process have posed challenges to the commercialization of nanogenerators. Keon Jae Lee, Associate Professor of Materials Science and Engineering at KAIST, and his colleagues have recently proposed a solution by developing a robust technique to transfer a high-quality piezoelectric thin film from bulk sapphire substrates to plastic substrates using laser lift-off (LLO).
Applying the inorganic-based laser lift-off (LLO) process, the research team produced a large-area PZT thin film nanogenerators on flexible substrates (2 cm x 2 cm).
“We were able to convert a high-output performance of ~250 V from the slight mechanical deformation of a single thin plastic substrate. Such output power is just enough to turn on 100 LED lights,” Keon Jae Lee explained.
The self-powered nanogenerators can also work with finger and foot motions. For example, under the irregular and slight bending motions of a human finger, the measured current signals had a high electric power of ~8.7 ?A. In addition, the piezoelectric nanogenerator has world-record power conversion efficiency, almost 40 times higher than previously reported similar research results, solving the drawbacks related to the fabrication complexity and low energy efficiency.
Lee further commented,
“Building on this concept, it is highly expected that tiny mechanical motions, including human body movements of muscle contraction and relaxation, can be readily converted into electrical energy and, furthermore, acted as eternal power sources.”
The research team is currently studying a method to build three-dimensional stacking of flexible piezoelectric thin films to enhance output power, as well as conducting a clinical experiment with a flexible nanogenerator.
The Latest on: Flexible energy harvesters
via Google News
The Latest on: Flexible energy harvesters
- An Iron-Based Generator That Uses Waste Heat to Power Small Electrical Deviceson May 11, 2020 at 7:24 pm
Researchers have discovered a way to convert heat energy into electricity by using a material mostly composed of iron.
- Flexible Thin Film and Printed Battery Market to Reach $11.03 Bn, Globally, By 2027 at 30.9% CAGR: Allied Market Researchon May 6, 2020 at 8:05 am
Allied Market Research published a report titled, “Flexible Thin Film and Printed Battery Market By Chargeability (Rechargeable, Non-Rechargeable) and.
- Flexible Thin Film and Printed Battery Market to Reach $11.03 Bn, Globally, By 2027 at 30.9% CAGR: Allied Market Researchon May 6, 2020 at 7:46 am
Advancement in IoT, increase in demand for smart electronic products, and rise in government concerns for flexible electronics drive the growth of the global flexible thin film and printed battery ...
- Powercast and Liquid X Announce Printed Electronics Venture to Enable Durable, Washable e-Textiles that Seal in Wireless Charging Electronicson May 5, 2020 at 5:45 am
Powercast Corporation, the leader in radio-frequency (RF)-based long-range over-the-air wireless power technology, and Liquid X, an advanced manufacturer of functional metallic inks with ...
- A flexible piezoresistive pressure sensor with zero standby power consumptionon May 1, 2020 at 1:25 am
(Nanowerk News) Flexible pressure sensors have been widely used in various applications, such as humanoid robots, wearable electronics and energy harvesting. Piezoresistive pressure sensors, which ...
- Novel Material Eyed to Create Flexible Thermoelectric Generator for Wearableson April 24, 2020 at 2:02 am
One of the ways to do this is through the harvesting of body heat, which can be a good source of natural energy. The team who created a soft and stretchable thermoelectric generator that can be used ...
- Flexible Thin Film and Printed Battery Marketon April 23, 2020 at 1:10 pm
"Flexible Thin Film and Printed Battery Market, by Chargeability (Rechargeable and Non-Rechargeable), by Application (Consumer Electronics, Energy Harvesting, Pharmaceutical & Medical Devices ...
- Researchers develop flags that generate energy from wind and sunon February 11, 2019 at 4:15 am
The novel wind and solar energy-harvesting flags have been developed using flexible piezoelectric strips and flexible photovoltaic cells. Piezoelectric strips allow the flag to generate power through ...
via Bing News