Solar driven electrochromic photoelectrochemical fuel cells for simultaneous energy conversion, storage and self-powered sensing

Nanoscale ◽  
2018 ◽  
Vol 10 (7) ◽  
pp. 3421-3428 ◽  
Author(s):  
Yanhu Wang ◽  
Lina Zhang ◽  
Kang Cui ◽  
Caixia Xu ◽  
Hao Li ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Energy Conversion ◽  
Efficient Energy ◽  
Highly Efficient ◽  
Energy Conversion And Storage ◽  
Self Powered ◽  
And Storage

One solar-driven electrochromic photoelectrochemical fuel cell (PFC) with highly efficient energy conversion and storage is easily constructed to achieve quantitative self-powered sensing.

Sun to fibers (S2F): massively scalable collection and transmission of concentrated solar light for efficient energy conversion and storage

2014 ◽  
Author(s):  
Juan J. Díaz León ◽  
Matthew P. Garrett ◽  
Junce Zhang ◽  
Katherine Han ◽  
R. Ernest Demaray ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Solar Light ◽  
Efficient Energy ◽  
Energy Conversion And Storage ◽  
And Storage

scholarly journals Carbon-based electrocatalysts for advanced energy conversion and storage

2015 ◽  
Vol 1 (7) ◽  
pp. e1500564 ◽  
Author(s):  
Jintao Zhang ◽  
Zhenhai Xia ◽  
Liming Dai
Keyword(s):  
Fuel Cells ◽  
Energy Conversion ◽  
Carbon Nanomaterials ◽  
Surface Characteristics ◽  
Reduction Reaction ◽  
Practical Significance ◽  
Metal Free ◽  
Energy Conversion And Storage ◽  
And Storage ◽  
Carbon Based

Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) play curial roles in electrochemical energy conversion and storage, including fuel cells and metal-air batteries. Having rich multidimensional nanoarchitectures [for example, zero-dimensional (0D) fullerenes, 1D carbon nanotubes, 2D graphene, and 3D graphite] with tunable electronic and surface characteristics, various carbon nanomaterials have been demonstrated to act as efficient metal-free electrocatalysts for ORR and OER in fuel cells and batteries. We present a critical review on the recent advances in carbon-based metal-free catalysts for fuel cells and metal-air batteries, and discuss the perspectives and challenges in this rapidly developing field of practical significance.

scholarly journals Facile Fabrication of Double-Layered Electrodes for a Self-Powered Energy Conversion and Storage System

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2380
Author(s):  
Seungju Jo ◽  
Nagabandi Jayababu ◽  
Daewon Kim
Keyword(s):  
Energy Conversion ◽  
Surface Area ◽  
Active Surface ◽  
Triboelectric Nanogenerator ◽  
Active Surface Area ◽  
Electrochemical Performances ◽  
Energy Conversion And Storage ◽  
Facile Fabrication ◽  
Self Powered ◽  
And Storage

An aluminum double-layered electrode (DE-Al) was successfully employed as two electrodes in a symmetrical supercapacitor (double-layered electrode symmetric SC (DE-SC)) and as a positive layer of a triboelectric nanogenerator (DE-TENG) with the aim of energy conversion and storage using a selfsame structured, self-powered flexible device. A facile water-assisted oxidation (WAO) process and metal sputtering after the WAO process can allow the electrodes to greatly improve the active surface area and the conductivity, leading to the enhancement of the electrochemical performances of a supercapacitor (SC). Particularly, this double-layered structure fabrication process is extremely less time-consuming and cost-effective. The electrochemical test of the proposed DE-Al was systematically conducted by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS), along with the in-depth characterizations of the surface. From these studies, the DE-Al offers exceptional electrochemical properties compared with other structures, which were utilized as the electrodes in the polyvinyl alcohol/phosphoric acid (PVA/H3PO4) gel electrolyte. The improved performance apparently evidenced from the electrochemical tests of fabricated SC resulted from the enhanced electrical conductivity and large active surface area. The specific capacitance and cycle-life stability of the DE-SC were investigated by using a GCD analysis. Additionally, the EIS curves before and after stability test (for 3500 cycles) were obtained to prove the long-term endurance of DE-SC. A vertical contact and the separation mode of the TENG were also fabricated by using the same DE-Al as a positive layer and polydimethylsiloxane (PDMS) as a negative layer. Finally, the fabricated SC and TENG were successfully combined using a bridge rectifier to convert and store the mechanical energy as electrical energy. This simple design and facile fabrication of a double-layered-electrode-based structure is promising for the development of an energy conversion and storage device.

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