scholarly journals Organolead Halide Perovskites Beyond Solar Cells: Self-Powered Devices and Associated Progress and Challenges

2021 ◽  
Author(s):  
Avi Mathur ◽  
Hua Fan ◽  
Vivek Maheshwari
Keyword(s):  
Solar Cells ◽  
Energy Harvesting ◽  
Lithium Ion Batteries ◽  
Electronic Devices ◽  
Lithium Ion ◽  
Halide Perovskites ◽  
Self Powered ◽  
Organolead Halide

Conventional electronic devices powered by lithium-ion batteries or supercapacitors face a challenge in offering long-term and self-sustaining operations. Self-powered devices based on emerging energy harvesting technologies can help achieve the...

Optimization of B2O3 coating process for NCA cathodes to achieve long-term stability for application in lithium ion batteries

Energy ◽  
2021 ◽  
Vol 222 ◽  
pp. 119913
Author(s):  
Jiasheng Chen ◽  
Xuan Liang Wang ◽  
En Mei Jin ◽  
Seung-Guen Moon ◽  
Sang Mun Jeong
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Coating Process ◽  
Term Stability ◽  
Long Term Stability

scholarly journals Advances in the Applications of Graphene-Based Nanocomposites in Clean Energy Materials

Crystals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 47
Author(s):  
Yiqiu Xiang ◽  
Ling Xin ◽  
Jiwei Hu ◽  
Caifang Li ◽  
Jimei Qi ◽  
...  
Keyword(s):  
Solar Cells ◽  
Fuel Cells ◽  
Lithium Ion Batteries ◽  
Electrode Materials ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Clean Energy ◽  
Proton Exchange ◽  
Energy Storage And Conversion ◽  
Thermoelectric Conversion

Extensive use of fossil fuels can lead to energy depletion and serious environmental pollution. Therefore, it is necessary to solve these problems by developing clean energy. Graphene materials own the advantages of high electrocatalytic activity, high conductivity, excellent mechanical strength, strong flexibility, large specific surface area and light weight, thus giving the potential to store electric charge, ions or hydrogen. Graphene-based nanocomposites have become new research hotspots in the field of energy storage and conversion, such as in fuel cells, lithium-ion batteries, solar cells and thermoelectric conversion. Graphene as a catalyst carrier of hydrogen fuel cells has been further modified to obtain higher and more uniform metal dispersion, hence improving the electrocatalyst activity. Moreover, it can complement the network of electroactive materials to buffer the change of electrode volume and prevent the breakage and aggregation of electrode materials, and graphene oxide is also used as a cheap and sustainable proton exchange membrane. In lithium-ion batteries, substituting heteroatoms for carbon atoms in graphene composite electrodes can produce defects on the graphitized surface which have a good reversible specific capacity and increased energy and power densities. In solar cells, the performance of the interface and junction is enhanced by using a few layers of graphene-based composites and more electron-hole pairs are collected; therefore, the conversion efficiency is increased. Graphene has a high Seebeck coefficient, and therefore, it is a potential thermoelectric material. In this paper, we review the latest progress in the synthesis, characterization, evaluation and properties of graphene-based composites and their practical applications in fuel cells, lithium-ion batteries, solar cells and thermoelectric conversion.

High-rate and long-term cycle stability of lithium-ion batteries enabled by boron-doping TiO2 nanofiber anodes

2019 ◽  
Vol 833 ◽  
pp. 573-579 ◽  
Author(s):  
Ling Li ◽  
Jing Zhang ◽  
Youlan Zou ◽  
Wenjuan Jiang ◽  
Weixin Lei ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Boron Doping ◽  
High Rate ◽  
Cycle Stability ◽  
Tio2 Nanofiber

Energy Harvesting With Piezoelectric Nanobrushes: Analysis and Design Principles

2009 ◽  
Author(s):  
Carmel Majidi ◽  
Mikko Haataja ◽  
David J. Srolovitz
Keyword(s):  
Energy Harvesting ◽  
Design Space ◽  
Electronic Devices ◽  
Wearable Electronics ◽  
Nanostructured Surface ◽  
Elastic Rod ◽  
Analysis And Design ◽  
Rod Theory ◽  
Piezoelectric Energy ◽  
Self Powered

The development of self-powered electronic devices is essential for emerging technologies such as wireless sensor networks, wearable electronics, and microrobotics. Of particular interest is the rapidly growing field of piezoelectric energy harvesting (PEH), in which mechanical strains are converted to electricity. Recently, PEH has been demonstrated by brushing an array of piezoelectric nanowires against a nanostructured surface. The piezoelectric nanobrush generator can be limited to sub-micron dimensions and thus allows for a vast reduction in the size of self-powered devices. Moreover, energy harvesting is controlled through contact between the nanowire tips and nanostructured surface, which broadens the design space to a wealth of innovations in tribology. Here we propose design criteria based on principles of contact mechanics, elastic rod theory, and continuum piezoelasticity.

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