Study on Efficient Electrode from Electronic waste renewed carbon material for sodium battery applications

2021 ◽  
Vol 9 (2) ◽  
pp. 105024
Author(s):  
P. Arjunan ◽  
M. Kouthaman ◽  
K. Kannan ◽  
K. Diwakar ◽  
V. Priyanka ◽  
...  
2017 ◽  
Vol 10 (4) ◽  
pp. 63-67
Author(s):  
A.V. Stepanov ◽  
◽  
P.I. Zolkin ◽  
U.Sh. Gamzaeva ◽  
◽  
...  

2020 ◽  
Vol 245 ◽  
pp. 116861
Author(s):  
Anastasia Gaydukova ◽  
Vladimir Kolesnikov ◽  
Alyona Stoyanova ◽  
Artem Kolesnikov

Author(s):  
Liisa Hakola ◽  
Elina Jansson ◽  
Romain Futsch ◽  
Tuomas Happonen ◽  
Victor Thenot ◽  
...  

AbstractSustainability in electronics has a growing importance due to, e.g. increasing electronic waste, and global and European sustainability goals. Printing technologies and use of paper as a substrate enable manufacturing of sustainable electronic devices for emerging applications, such as the multi-layer anti-counterfeit label presented in this paper. This device consisted of electrochromic display (ECD) element, NFC (near field communication) tag and circuitry, all fully roll-to-roll (R2R) printed and assembled on plastic-free paper substrate, thus leading to a sustainable and recyclable device. Our setup uses harvested energy from HF field of a smartphone or reader, to switch an electrochromic display after rectification to prove authenticity of a product. Our novelty is in upscaling the manufacturing process to be fully printable and R2R processable in high-throughput conditions simulating industrial environment, i.e. in pilot scale. The printing workflow consisted of 11 R2R printed layers, all done in sufficient quality and registration. The printed antennas showed sheet resistance values of 32.9±1.9 mΩ/sq. The final yield was almost 1500 fully printed devices, and in R2R assembly over 1400 labels were integrated with 96.5% yield. All the assembled tags were readable with mobile phone NFC reader. The optical contrast (ΔE*) measured for the ECDs was over 15 for all the printed displays, a progressive switching time with a colour change visible in less than 5 s. The smart tag is ITO-free, plastic-free, fully printed in R2R and has a good stability over 50 cycles and reversible colour change from light to dark blue.


Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3722
Author(s):  
Joanna Willner ◽  
Agnieszka Fornalczyk ◽  
Magdalena Jablonska-Czapla ◽  
Katarzyna Grygoyc ◽  
Marzena Rachwal

The article draws attention to the problem of the presence of metals: germanium (Ge), tellurium (Te), thallium (Tl), and others (Cd, Ba, Co, Mn, Cr, Cu, Ni, Pb, Sr, and Zn) in selected waste of electrical and electronic equipment (WEEE). As a result of the growing demand for new technologies, the global consumption of TECs has also been increasing. Thus, the amount of metals in circulation, of which the impacts on the environment have not yet been fully understood, is constantly increasing. Due to the low content of these metals in WEEE, they are usually ignored during e-waste analyses. The main aim of this study was to determine the distribution of Ge, Te, and Tl (and other elements) in ground sieve fractions (1.0, 0.5, 0.2, and 0.1 mm) of selected electronic components (solar lamps, solar cell, LED TV screens, LCD screens, photoresistors, photodiodes, phototransistors) and to determine the possible tendency of the concentrations of these metals in fractions. This problem is particularly important because WEEE recycling processes (crushing, grinding, and even collection and transport operations) can lead to dispersion and migration of TCE pollutants into the environment. The quantitative composition of e-waste was identified and confirmed by ICP-MS, ICP-OES and SEM-EDS, and XRD analyses. It was found that Ge, Te, and Tl are concentrated in the finest fractions of ground e-waste, together with Cd and Cr, which may favor the migration of these pollutants in the form of dust during storage and processing of e-waste.


Author(s):  
qiqi li ◽  
Tao Wang ◽  
yuan zeng ◽  
yun fan ◽  
Shejun Chen ◽  
...  

The present study investigated legacy and novel brominated flame retardants (BFRs) in atmospheric PM2.5 associated with various urban source sectors in a city and electronic waste (e-waste) recycling facilities in...


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