A novel cord-shaped supercapacitor with high stretchability

2019 ◽  
Vol 89 (19-20) ◽  
pp. 4265-4271
Author(s):  
Wenqi Nie ◽  
Shu Zhang ◽  
Xin Ding ◽  
Jiyong Hu ◽  
Xudong Yang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Power Density ◽  
Three Dimensional ◽  
Storage Device ◽  
High Porosity ◽  
Energy Storage Device ◽  
High Capacitance ◽  
Capacitive Performance ◽  
Integration Technology

Cord-shaped stretchable supercapacitors have received much attention due to their high stretchability and three-dimensional flexibility. For coaxial supercapacitors, lower capacitive performance and the inextensibility of the separation layer have been the important factors hindering further developments. In this work, we developed an integration technology to fabricate multiple yarn-electrodes by a layer-to-layer braiding. Between the inner and outer electrodes there is a braided elastic separator by braiding multiple spandex yarns. The braided separator features not only a reliable separation of the inner and outer electrodes, but also a high stretchability and high porosity. The cord-shaped supercapacitor shows an excellent capacitive performance of 60.1 mF/cm2 with energy density of 5.4 μWh/cm2, power density of 0.52 mW/cm2 and extremely high capacitance retention of 99.8% under the strain of 100%, demonstrating the application value of this stretchable energy storage device.

Comparative supercapacitance performance of CuO nanostructures for energy storage device applications

RSC Advances ◽  
2015 ◽  
Vol 5 (26) ◽  
pp. 20545-20553 ◽  
Author(s):  
V. Senthilkumar ◽  
Yong Soo Kim ◽  
S. Chandrasekaran ◽  
Balasubramaniyan Rajagopalan ◽  
Eui Jung Kim ◽  
...  
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Specific Capacitance ◽  
Power Density ◽  
Storage Device ◽  
Energy Storage Device ◽  
Ni Foam ◽  
Sem Images ◽  
Device Applications

(a)–(c) FE-SEM images of CuO nanoplates on Ni foam, flower-shaped CuO and bud-shaped CuO. (d) Specific capacitance and (d) and (e) Ragone plots of power density vs. energy density according to CuO electrodes in an asymmetrical device.

Constructed Ag NW@Bi/Al core–shell nano-architectures for high-performance flexible and transparent energy storage device

Nanoscale ◽  
2020 ◽  
Vol 12 (37) ◽  
pp. 19308-19316
Author(s):  
Xin He ◽  
Junyan Liu ◽  
Sirou Zhao ◽  
Yu Zhong ◽  
Bohua Chen ◽  
...  
Keyword(s):  
Energy Storage ◽  
Power Density ◽  
High Performance ◽  
Negative Electrode ◽  
Electrochemical Stability ◽  
Storage Device ◽  
Core Shell ◽  
Energy Storage Device ◽  
High Transparency ◽  
Hierarchical Nanostructure

We developed an Ag NW@Bi/Al 1D hierarchical nanostructure as a negative electrode for flexible and transparent energy storage device (FTESD), which endows high transparency, improved energy/power density and electrochemical stability.

Polyaniline-based carbon nanospheres and redox mediator doped robust gel films lead to high performance foldable solid-state supercapacitors

2017 ◽  
Vol 41 (17) ◽  
pp. 9024-9032 ◽  
Author(s):  
Enke Feng ◽  
Hui Peng ◽  
Zhiguo Zhang ◽  
Jindan Li ◽  
Ziqiang Lei
Keyword(s):  
Energy Storage ◽  
Solid State ◽  
Energy Density ◽  
High Performance ◽  
High Energy ◽  
High Energy Density ◽  
Storage Device ◽  
Energy Storage Device ◽  
Carbon Nanospheres ◽  
Device Applications

As-fabricated foldable solid-state supercapacitors are suitable for highly fold-tolerant high-energy-density energy storage device applications.

Experimental Evaluation of a Buoyancy Driven Energy Storage Device

2013 ◽  
Vol 816-817 ◽  
pp. 887-891 ◽  
Author(s):  
Abdul Hai Alami ◽  
Huma Bilal
Keyword(s):  
Experimental Study ◽  
Energy Storage ◽  
Energy Density ◽  
Current System ◽  
Theoretical Background ◽  
Maintenance Cost ◽  
Energy Sources ◽  
Storage Device ◽  
Energy Storage Device ◽  
Storage Devices

An experimental study on buoyancy driven-storage device is presented in the paper. The proposed device is forced to descend into a tank filled with a certain fluid the tension of a nylon wire that allows it to remain stationary at the bottom of the tank until the energy is needed. It is then released to reach the surface of the fluid liberating energy during that process. This paper also briefly presents the theoretical background and compares it with the experimental results. The application of this research is related to energy storage by non-conventional energy sources during off-peak timings. The experiments performed, have confirmed the validity of the approach and efficiency of the current system exceeds more than 40%. Other advantages like compact storage setups, higher energy density retrieval, longer life and low maintenance cost has made it more authentic than chemical storage devices.

scholarly journals Mathematical and Computer Modeling of Piezoelectric Generator for Energy Harvesting Devices

2019 ◽  
pp. 1-14
Author(s):  
A. N. Soloviev ◽  
D. A. Ermakov
Keyword(s):  
Energy Storage ◽  
Energy Harvesting ◽  
Computer Modeling ◽  
Numerical Experiments ◽  
Three Dimensional ◽  
Inertial Mass ◽  
Storage Device ◽  
Energy Storage Device ◽  
Piezoelectric Generator ◽  
Energy Harvesting Devices

The paper deals with modeling a Piezoelectric Generator (PEG) that includes piezoactive elements, inertial mass, plate and rack. The PEG under consideration can be an element of the energy storage device in the capacity of the source of energy provided from vibrations of elements of structures and machines.The main objective of the paper is to gain the PEG efficiency by finding the optimal geometric parameters for finding the highest output potential.The elastic and piezoceramic media are modeled within the framework of the linear theory of electroelasticity. As a research tool, CAE package ACELAN is used in which three-dimensional and axisymmetric device models are built. The numerical experiments performed a modal and harmonic analysis that enabled us to identify the most effective operating frequencies.

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