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Authors = Neha Chawla ORCID = 0000-0002-0765-984X

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19 pages, 2238 KiB  
Review
Sodium Batteries: A Review on Sodium-Sulfur and Sodium-Air Batteries
by Neha Chawla and Meer Safa
Electronics 2019, 8(10), 1201; https://doi.org/10.3390/electronics8101201 - 22 Oct 2019
Cited by 44 | Viewed by 20090
Abstract
Lithium-ion batteries are currently used for various applications since they are lightweight, stable, and flexible. With the increased demand for portable electronics and electric vehicles, it has become necessary to develop newer, smaller, and lighter batteries with increased cycle life, high energy density, [...] Read more.
Lithium-ion batteries are currently used for various applications since they are lightweight, stable, and flexible. With the increased demand for portable electronics and electric vehicles, it has become necessary to develop newer, smaller, and lighter batteries with increased cycle life, high energy density, and overall better battery performance. Since the sources of lithium are limited and also because of the high cost of the metal, it is necessary to find alternatives. Sodium batteries have shown great potential, and hence several researchers are working on improving the battery performance of the various sodium batteries. This paper is a brief review of the current research in sodium-sulfur and sodium-air batteries. Full article
(This article belongs to the Special Issue Advanced Renewable Energy Technologies)
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25 pages, 5688 KiB  
Review
Recent Advances in Non-Flammable Electrolytes for Safer Lithium-Ion Batteries
by Neha Chawla, Neelam Bharti and Shailendra Singh
Batteries 2019, 5(1), 19; https://doi.org/10.3390/batteries5010019 - 1 Feb 2019
Cited by 141 | Viewed by 33373
Abstract
Lithium-ion batteries are the most commonly used source of power for modern electronic devices. However, their safety became a topic of concern after reports of the devices catching fire due to battery failure. Making safer batteries is of utmost importance, and several researchers [...] Read more.
Lithium-ion batteries are the most commonly used source of power for modern electronic devices. However, their safety became a topic of concern after reports of the devices catching fire due to battery failure. Making safer batteries is of utmost importance, and several researchers are trying to modify various aspects in the battery to make it safer without affecting the performance of the battery. Electrolytes are one of the most important parts of the battery since they are responsible for the conduction of ions between the electrodes. In this paper, we discuss the different non-flammable electrolytes that were developed recently for safer lithium-ion battery applications. Full article
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14 pages, 3733 KiB  
Article
Mechanism of Ionic Impedance Growth for Palladium-Containing CNT Electrodes in Lithium-Oxygen Battery Electrodes and Its Contribution to Battery Failure
by Neha Chawla, Amir Chamaani, Meer Safa, Marcus Herndon and Bilal El-Zahab
Batteries 2019, 5(1), 15; https://doi.org/10.3390/batteries5010015 - 23 Jan 2019
Cited by 9 | Viewed by 9002
Abstract
The electrochemical oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) and on CNT (carbon nanotube) cathode with a palladium catalyst, palladium-coated CNT (PC-CNT), and palladium-filled CNT (PF-CNT) are assessed in an ether-based electrolyte solution in order to fabricate a lithium-oxygen battery with [...] Read more.
The electrochemical oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) and on CNT (carbon nanotube) cathode with a palladium catalyst, palladium-coated CNT (PC-CNT), and palladium-filled CNT (PF-CNT) are assessed in an ether-based electrolyte solution in order to fabricate a lithium-oxygen battery with high specific energy. The electrochemical properties of the CNT cathodes were studied using electrochemical impedance spectroscopy (EIS). Palladium-filled cathodes displayed better performance as compared to the palladium-coated ones due to the shielding of the catalysts. The mechanism of the improvement was associated to the reduction of the rate of resistances growth in the batteries, especially the ionic resistances in the electrolyte and electrodes. The scanning electron microscopy (SEM) and spectroscopy were used to analyze the products of the reaction that were adsorbed on the electrode surface of the battery, which was fabricated using palladium-coated and palladium-filled CNTs as cathodes and an ether-based electrolyte. Full article
(This article belongs to the Special Issue Recent Advances in Post-Lithium Ion Batteries)
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