BRACAMONTE MARÍA VICTORIA
Capítulos de libros
Título:
Graphene in Lithium‐Ion/Lithium‐Sulfur Batteries
Autor/es:
LUQUE, GUILLERMINA L.; PARA, MARIA LAURA; PRIMO, E.N.; BRACAMONTE, M. V; OTERO, MANUEL; ROJAS, MARIA DEL CARMEN; GARCIA SORIANO, FRANCISCO; LENER, GERMAN; CALDERON, ANDREA; CHUNWEN SUN
Libro:
Advanced Battery Materials
Editorial:
Scrivener Publishing LLC
Referencias:
Año: 2019; p. 399 - 449
Resumen:
In order to deal with the energy demand of the increasing global population, the use of sustainable sources of energy has become mandatory to attenuate the environmental problems that come along with the use of fossil sources of energy. However, one of the problems of renewable energy sources, such as wind or sun, is that they are intermittent. So, in order to make the best use of them, we need good energy storage systems able to capture, manage and store energy at a large scale and low cost. If we are also capable of replacing the gasoline powered trans-portation with electric vehicles, the greenhouse emissions would be significantly reduced. As well, it is necessary a change in the energetic matrix for stationary devices to solve the transport cost and the greenhouse emission provokes for the use of natural gas. Considering this, the major promises to accomplish the needs of high gravimetric, volumetric and power density is given by lithium batteries. In the past decades and up to nowadays, they have become the energy source of almost all electronic portable devices and made possible a huge number of tech-nological applications. Graphene based materials, due to their unique properties, have become of great interest to be used in different components of the battery: anode, cathode and separator. As part of the electrodes, used adequately, graphene materials improve the electron and ionic mobility providing not only higher elec-trical conductivity, but also higher capacity. Due to the rich carbon chemistry, graphene can be easily functionalized with different groups leading to changes in its properties. In this sense, the nano-sized dimension and elevated specific sur-face area makes it a perfect candidate for improving conductivity, connectivity and lithium-ion transport in both cathode and anode active materials. Functionalized graphene is also used in the modification of separators of lithium-sulfur batteries for the suppression of the ?polysulfide shuttle mechanism? due to its interaction/repulsion with the charged intermediate polysulfide species. This chapter pres-ents a critical overview of the state-of-art in the optimization and application of graphene derived materials for anodes, cathodes and separators in lithium batter-ies. Besides a thorough description of novel designs and general discussion of the attained electrochemical performances, this chapter also aims to discuss desired properties and current drawbacks for massive industrial application in lithium batteries.
