Journal•ISSN: 2045-9831
Nanomaterials and Energy
Thomas Telford Ltd.
About: Nanomaterials and Energy is an academic journal published by Thomas Telford Ltd.. The journal publishes majorly in the area(s): Thin film & Nanoparticle. It has an ISSN identifier of 2045-9831. Over the lifetime, 250 publications have been published receiving 1208 citations.
Topics: Thin film, Nanoparticle, Chemistry, Engineering, Band gap
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TL;DR: In this paper, the authors considered hydrogen as an environmentally friendly alternative to conventional fossil fuels and considered as a renewable energy carrier for meeting the ever-increasing energy demand, although hydrogen is...
Abstract: Hydrogen is an environmentally friendly alternative to conventional fossil fuels and is considered as a renewable energy carrier for meeting the ever-increasing energy demand. Although hydrogen is ...
50 citations
TL;DR: Among doped zirconia and ceria, 8 mol% yttria-stabilized and 9 −11 mol% scandia -stabilised zircons exhibit the highest conductivity as discussed by the authors.
Abstract: Zirconia and ceria possess fluorite-type structure and conduct electricity by means of oxide ion transport through the lattice. On doping, vacancies created at the oxygen site make way for the neighbouring oxygen atoms to ‘hop’ in the direction of electric field. Among doped zirconia, 8 mol% yttria-stabilized zirconia and 9–11 mol% scandia-stabilized zirconia exhibit the highest conductivity. Ceria electrolytes require lower operational temperature (~600–800°C) compared to that of zirconia electrolytes (800–1000°C). With improvement in the processing and fabrication techniques, researchers have developed thinner electrolytes to minimize ohmic polarization and enhance the ionic conductivity enabling operation at lower temperatures (~400–600°C). But such electrolytes are required to be supported on electrodes (anode or cathode) and in later times heterostructured bi-, tri- and multi-layered electrolyte films have been constructed. Since the last decade, development of submicron grain size electrolytes and u...
48 citations
TL;DR: In this paper, the authors proposed an ionic conductivity of 0·1 S/cm for solid oxide fuel cells (SOFCs) and showed that reducing the operating temperature leads to an increase in electrolyte ohmic resistance losses as ionic transport is governed by thermal activation.
Abstract: Solid oxide fuel cells (SOFCs) generate electricity at very high efficiency with low to negligible emissions, making them as an attractive option for power generation. Though conventional SOFCs operate at 1000°C or more, current research is focused on reducing the operation to intermediate temperatures (300–600°C) without compromising the power density in order to develop economic and cost effective fuel cell systems for commercialization. Since electrolyte material significantly affects the operating temperature, one of the critical challenges is to design and develop electrolytes with an ionic conductivity of 0·1 S/cm. Reduction in operating temperature leads to an increase in electrolyte ohmic resistance losses as ionic transport is governed by thermal activation. Since 1960s fluorite structured cerium oxide-based electrolytes have been studied for engineering the ionic conductivity. Researchers have used various structural and technological modifications through doping, grain size reduction, developme...
47 citations
TL;DR: In this article, ZnFe2O4 nanoparticles were synthesized by using solution gelation and self-combustion technique and were structurally analyzed by X-ray diffraction.
Abstract: Zinc ferrite (ZnFe2O4) nanoparticles were synthesised by using solution gelation and the self-combustion technique. The resulting zinc ferrite nanoparticles were structurally analysed by X-ray diff...
44 citations
TL;DR: In this paper, a review summarises the fundamentals of electrical energy storage in capacitors and batteries, discusses the similarities and differences of the two classes of devices and addresses the potential impact of the current research.
Abstract: With the anticipated increase in renewable wind and solar energy, efficient storage of electrical energy for balancing energy generation and demand on various time scales is becoming increasingly important. This review summarises the fundamentals of electrical energy storage in capacitors and batteries, discusses the similarities and differences of the two classes of devices and addresses the potential impact of the current research. A number of new materials and device structures that are anticipated to play roles in new devices are reviewed in greater detail. Topics covered are carbon nanotubes (CNTs), graphene, nanostructured transition metal oxides, silicon-based devices, ionic liquids (ILs), ion-conductive polymers and asymmetric supercapacitors.
40 citations