Silver decorated lanthanum calcium manganate for electrochemical supercapacitor
01 Jul 2021-Vol. 8, Iss: 7, pp 075502
About: The article was published on 2021-07-01 and is currently open access. It has received 5 citations till now. The article focuses on the topics: Manganate & Lanthanum.
Citations
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TL;DR: In this article, a two-step electrodeposition based on the inspiring design of coaxial cables was used to produce perovskite transition metal oxides for supercapacitor electrodes.
17 citations
TL;DR: In this article , a two-step electrodeposition based on the inspiring design of coaxial cables was used to produce perovskite transition metal oxides for supercapacitor electrodes.
17 citations
TL;DR: In this paper , a review of perovskite-based electrode materials with controllable properties and structural advantages has been presented in the field of electrochemical energy storage, focusing on the controllability and structural properties.
Abstract: In recent years, electrode materials of perovskite structure with controllable properties and structural advantages have been widely studied in the field of electrochemical energy storage. In this review, the research...
5 citations
TL;DR: In this paper , a high-sensitivity thermistor La0.7Na0.2MnO3 film with a perovskite structure was fabricated and studied, and the results showed that the film displayed excellent adaptation and clear interfaces with the SrTiO3 substrate.
Abstract: A high-sensitivity thermistor La0.7Na0.3− xK xMnO3 ( x = 0.2) film with a perovskite structure was fabricated and studied. The results show that the film displayed excellent adaptation and clear interfaces with the SrTiO3 substrate. Under the combination of Jahn–Teller effect and double exchange mechanism, the temperature coefficient of resistivity ( TCR) of the La0.7Na0.1K0.2MnO3 film reached 10.86% K−1 at 296.98 K. Compared with the conventional VO2 and nickel–manganite-based film materials, the La0.7Na0.1K0.2MnO3 film with high TCR values at room temperature exhibited tunable metal–insulation transition temperature and more sensitive thermal properties. Consequently, the La0.7Na0.1K0.2MnO3 film can substantially improve the detection sensitivity of uncooled infrared bolometers as thermistor materials.
References
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TL;DR: CMG materials are made from 1-atom thick sheets of carbon, functionalized as needed, and here their performance in an ultracapacitor cell is demonstrated, illustrating the exciting potential for high performance, electrical energy storage devices based on this new class of carbon material.
Abstract: The surface area of a single graphene sheet is 2630 m2/g, substantially higher than values derived from BET surface area measurements of activated carbons used in current electrochemical double layer capacitors. Our group has pioneered a new carbon material that we call chemically modified graphene (CMG). CMG materials are made from 1-atom thick sheets of carbon, functionalized as needed, and here we demonstrate in an ultracapacitor cell their performance. Specific capacitances of 135 and 99 F/g in aqueous and organic electrolytes, respectively, have been measured. In addition, high electrical conductivity gives these materials consistently good performance over a wide range of voltage scan rates. These encouraging results illustrate the exciting potential for high performance, electrical energy storage devices based on this new class of carbon material.
7,505 citations
TL;DR: It is shown that perovskite absorbers can function at the highest efficiencies in simplified device architectures, without the need for complex nanostructures.
Abstract: Many different photovoltaic technologies are being developed for large-scale solar energy conversion. The wafer-based first-generation photovoltaic devices have been followed by thin-film solid semiconductor absorber layers sandwiched between two charge-selective contacts and nanostructured (or mesostructured) solar cells that rely on a distributed heterojunction to generate charge and to transport positive and negative charges in spatially separated phases. Although many materials have been used in nanostructured devices, the goal of attaining high-efficiency thin-film solar cells in such a way has yet to be achieved. Organometal halide perovskites have recently emerged as a promising material for high-efficiency nanostructured devices. Here we show that nanostructuring is not necessary to achieve high efficiencies with this material: a simple planar heterojunction solar cell incorporating vapour-deposited perovskite as the absorbing layer can have solar-to-electrical power conversion efficiencies of over 15 per cent (as measured under simulated full sunlight). This demonstrates that perovskite absorbers can function at the highest efficiencies in simplified device architectures, without the need for complex nanostructures.
7,018 citations
TL;DR: This tutorial review provides a brief summary of recent research progress on carbon-based electrode materials forsupercapacitors, as well as the importance of electrolytes in the development of supercapacitor technology.
Abstract: This tutorial review provides a brief summary of recent research progress on carbon-based electrode materials for supercapacitors, as well as the importance of electrolytes in the development of supercapacitor technology. The basic principles of supercapacitors, the characteristics and performances of various nanostructured carbon-based electrode materials are discussed. Aqueous and non-aqueous electrolyte solutions used in supercapacitors are compared. The trend on future development of high-power and high-energy supercapacitors is analyzed.
6,057 citations
TL;DR: This Review introduces several typical energy storage systems, including thermal, mechanical, electromagnetic, hydrogen, and electrochemical energy storage, and the current status of high-performance hydrogen storage materials for on-board applications and electrochemicals for lithium-ion batteries and supercapacitors.
Abstract: [Liu, Chang; Li, Feng; Ma, Lai-Peng; Cheng, Hui-Ming] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China.;Cheng, HM (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China;cheng@imr.ac.cn
4,105 citations
TL;DR: It is shown that even when some metrics seem to support energy densities for ECs approaching or even exceeding that of batteries, actual device performance may be rather mediocre.
Abstract: A dramatic expansion of research in the area of electrochemical energy storage (EES) during the past decade has been driven by the demand for EES in handheld electronic devices, transportation, and storage of renewable energy for the power grid (1-3). However, the outstanding properties reported for new electrode materials may not necessarily be applicable to performance of electrochemical capacitors (ECs). These devices, also called supercapacitors or ultra-capacitors (4), store charge with ions from solution at charged porous electrodes. Unlike batteries, which store large amounts of energy but deliver it slowly, ECs can deliver energy faster (develop high power), but only for a short time. However, recent work has claimed energy densities for ECs approaching (5) or even exceeding that of batteries. We show that even when some metrics seem to support these claims, actual device performance may be rather mediocre. We will focus here on ECs, but these considerations also apply to lithium (Li)--ion batteries.
2,065 citations