Applications magnetic energy storage

Frey NA, Peng S, Cheng K, Sun S (2009) Magnetic nanoparticles synthesis, functionalization, and applications in bioimaging and magnetic energy storage. Chem Soc Rev 38 2532... 

In recent years, the growing numbers of publications are concerned with ultra-fine metal oxide structures because of their useful applications as bactericides, adsorbents, energy storage media, magnetic data storage, and ferrofluids and specifically as catalysts [6, 7]. 

Spinel-type cobalt oxide (C03O4) was selected as a model material because it is potentially useful for applications in catalysis, sensors, magnetic materials, and energy storage as electrodes in lithium-ion batteries. ... 

Metal nanopartieles have been shown to be important for catalysis, spectroscopy, optoelectronic devices, and magnetic data storage. Successful exploitation of metallic nanopartieles lies in the successful conjugation of their active surface structure. Thus, size and shape play a role in terms of variable surface energy. This becomes paradoxical when surface activity and stabilization are examined both surface activity and particle stabilization need to be controlled. Thus, proper support becomes inevitably a unique choice, which simultaneously can promote surface activity and provide stabilization to the metallic nanopartieles for innumerable applications. Proper support stabilizes metal nanopartieles of different sizes and shapes but not at the cost of surface activity. At this time, only a few achievements are promising. In an analogous fashion, metal oxides, generally transition metal oxides, are robust and are the future material of choice for supports. 

As previously mentioned, another class of fluoropolymers known to be readily soluble in CO2 are perfluoropolyethers (PFPEs) [1]. A unique class of fluoropolymers, PFPE polymers and copolymers have been established as high performance materials, exhibiting low surface energies and low moduli, as well as excellent thermal and chemical stabilities. PFPEs are primarily found in high-performance lubricant applications, e.g., for magnetic data storage media and as heat exchanger fluids. One of the main industrial processes for the production of PFPEs is photooxidation of fluoroolefins [41]. Currently, only TFE and HFP are used commercially in this process. Typically, HFP is photooxidized in bulk because of its very low reactivity, while TFE requires an inert diluent in order to prevent homopolymerization of the olefin. 

Practical applications for nonmetallic materials and composites in thermal or dielectric insulation and in the mechanical anchoring of superconductive cables and superconductive energy storage magnets, the construction of liquefied gas tanks and pipelines, and the manufacture of supports for space-based reflectors and telescopes. 

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