CIC ENERGIGUNE

Moreda Araba / Moreda de Álava, Spain

CIC ENERGIGUNE

Moreda Araba / Moreda de Álava, Spain
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Palomares V.,University of the Basque Country | Casas-Cabanas M.,CIC ENERGIGUNE | Castillo-Martinez E.,CIC ENERGIGUNE | Han M.H.,CIC ENERGIGUNE | Rojo T.,University of the Basque Country
Energy and Environmental Science | Year: 2013

This work presents an up-to-date information on Na-based battery materials. On the one hand, it explores the feasibility of two novel energy storage systems: Na-aqueous batteries and Na-O2 technology. On the other hand, it summarises new advances on non-aqueous Na-ion systems. Although all of them can be placed under the umbrella of Na-based systems, aqueous and oxygen-based batteries are arising technologies with increasing significance in energy storage research, while non-aqueous sodium-ion technology has become one of the most important research lines in this field. These systems meet different requirements of energy storage: Na-aqueous batteries will have a determining role as a low cost and safer technology; Na-O2 systems can be the key technology to overcome the need for high energy density storage devices; and non-aqueous Na-ion batteries have application in the field of stationary energy storage. © 2013 The Royal Society of Chemistry.


Hueso K.B.,University of the Basque Country | Armand M.,CIC ENERGIGUNE | Rojo T.,University of the Basque Country
Energy and Environmental Science | Year: 2013

The progress in the research and development of high temperature sodium batteries suggests that all-solid-state batteries with inorganic or polymer solid electrolytes are promising power sources for a wide range of applications due to their high thermal stability, reliability, long-cycle life and versatile geometries. The electrolytes play a fundamental role in terms of current (power) density, the time stability, and the safety of batteries and, as a result, their continuous improvement and innovation are indeed critical to success. In fact, inorganic solid electrolytes pave the way for improving the cost-effective development of rechargeable sodium batteries. This review describes a state-of-the-art overview of most of the Na+ conductors for use as electrolytes in sodium/sulphur and ZEBRA batteries. The emphasis of this article is on inorganic solid electrolytes, especially, ceramic and glass-ceramic electrolytes as promising alternatives applicable to all solid-state batteries. As part of a continuous effort to find new materials that operate at room temperature and moderate temperatures, NASICON electrolytes will also be considered. Polymer electrolytes based on poly(ethylene oxide) (PEO) are also very suitable for all solid-state batteries. Hence, the review focuses on ion transport based on the observed conductivity, electrolyte preparation, safety and environmental impact. © 2013 The Royal Society of Chemistry.


Layered transition metal oxides (LTMOs) have a long tradition of success as effective electrode materials for power storage applications. However, the growing demand for improved technologies has motivated a strong interest in developing new generations of this class of materials. First-principles calculations, in particular density functional theory (DFT), have become an important tool to gain atomic-level understanding and speed up the search of new materials in general. An important structural ingredient of LTMOs is the weak van der Waals (vdW) forces that hold layers together. Unfortunately, conventional DFT approaches have serious shortcomings to treat these dispersion interactions. This is an uneasy position for the role of DFT in describing such layered-type structural materials. Recent exciting developments in DFT allow us now to tackle this problem head on. Here we have employed newly developed vdW-inclusive methods based on improved nonlocal density functionals to thoroughly explore the role of vdW forces in key thermodynamic and kinetic properties of alkali (Li, Na, and K) and alkaline-earth (Mg, Ca, and Sr) ion insertion into α-V2O5. We find that vdW forces help to stabilize inserted ions and, therefore, increase average voltages compared to the values obtained with conventional non-vdW-inclusive DFT methods. Added to this, activation energies for ion diffusion significantly increase as a consequence of a proper account for vdW interactions. These results highlight the relevance of vdW forces to ion intercalation and dynamics in LTMOs in general. © 2014 American Chemical Society.


Patent
Cic Energigune | Date: 2016-04-20

The present invention relates to a sodium-ion battery comprising a positive electrode compartment comprising a positive electrode, said positive electrode comprising a Na-insertion compound; a negative electrode compartment comprising a negative electrode, said negative electrode comprising metallic sodium; and an electrolyte composition comprising a solid sodium-ion conductive ceramic electrolyte and a catholyte comprising a metallic salt with formula MY, wherein M is a cation selected from an alkali metal and an alkali-earth metal; and Y is an anion selected from [R^(1)SO_(2)NSO_(2)R^(2)], CF_(3)SO_(3)^(-), C(CN)_(3)^(-), B(C_(2)O_(4))_(2)^(-) and BF_(2)(C_(2)O_(4))^(-), wherein R_(1) and R_(2) are independently selected from fluorine or a fluoroalkyl group. The device is able to operate below the melting point of the anode component.


The present invention describes a hierarchical graphitized carbon foam comprising an interconnected macroporous structure with an ordered mesoporous wall structure, a process for its preparation, as well as to a process for the synthesis of a variety of bimodal porous organic polymer and/or inorganic metal oxide materials


The present invention relates to lithium salts of formula Li_(2)SO_(4), Li_(3)PO_(4) and Li_(4)SiO_(4) in which a fraction of the oxygen from the polyanionic framework is replaced by nitrogen, and which are also associated with a transition metal, its use as electrode materials and a electrochemical generator comprising said lithium salts as material of the positive electrode.


Patent
Cic Energigune | Date: 2015-10-28

The present invention refers to an electrochemical cell comprising: a) an electrolyte composition comprising a sterically hindered glyme, and b) a negative electrode comprising graphite as active material, as well as to an energy storage device comprising said electrochemical cell.


Patent
Cic Energigune | Date: 2013-01-21

A nanoparticulate organic hybrid material comprising inorganic nanoparticles covalently grafted with at least one anion of an organic sodium or lithium salt is provided. In addition, a process for preparing the nanoparticulate organic hybrid material and its use in the preparation of electrolytes suitable for lithium and sodium secondary batteries are provided.


The present invention describes a process for preparing a flexible hierarchical graphitized carbon foam comprising an interconnected macroporous structure with an ordered mesoporous wall structure, as well as to a process for the synthesis of highly graphitized hierarchical carbon foams.


Patent
Cic Energigune | Date: 2014-01-22

The present invention relates to a nanoparticle organic hybrid material comprising inorganic nanoparticles covalently grafted with at least one anion of an organic sodium or lithium salt, process for its preparation and its use in the preparation of electrolytes suitable for lithium and sodium secondary batteries.

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