P. López-Aranguren

CIC Energigune

The increasing demand for safe, highly efficient, and cost-effective energy storage systems has accelerated the development of solid-state batteries (SSBs) with lithium metal (LiM) anodes. This technology offers remarkable advantages over conventional lithium-ion batteries with liquid electrolytes; from improved safety with non-flammable electrolyt...

Halides are potential electrolytes for Li metal solid state batteries owing to their combination of high ionic conductivity, ductility and electrochemical stability against oxidation. However, their reactivity with the Li metal electrode may result in the formation of secondary compounds hindering their practical utility in terms of cycling perform...

Li6PS5Cl (LPSCl) argyrodites offer high room temperature ionic conductivity (>1 mS cm⁻¹) and are among the most promising solid electrolytes. However, their chemical instability against Li metal compromises the long‐term cyclability. Using PEO‐LiTFSI as an interlayer or as a matrix for composite electrolytes is a promising strategy to address this...

Li7La3Zr2O12 garnets are among the most promising materials for solid‐state electrolytes thanks to their high electrochemical stability and ionic conductivity. However, they are unstable in air and easily undergo a Li⁺/H⁺ exchange reaction, forming a lithiophobic and poorly Li‐conducting surface layer composed of LiOH and Li2CO3 upon further reacti...

The replacement of conventional lithium‐ion batteries with solid‐state batteries is currently under investigation by many players both from academia and industry. Sulfide‐based electrolytes are among the materials that are regarded as most promising, especially for application in the transport sector. The performance of anode, cathode, and solid el...

The development of next-generation batteries relies on addressing critical challenges such as the formation of a robust and stable solid electrolyte interphase (SEI) as well as mitigating lithium dendrite propagation.

Despite the high ionic conductivity and attractive mechanical properties of sulfide-based solid-state batteries, this chemistry still faces key challenges to encompass fast rate and long cycling performance, mainly arising from dynamic and complex solid–solid interfaces. This work provides a comprehensive assessment of the cell performance-determin...

Sulfide electrolytes, including the argyrodite family (Li6PS5X, X = Cl, Br, I), exhibit high ionic conductivities and transference numbers and are regarded as promising electrolytes for all-solid-state lithium batteries. Although high ionic conductivity is a necessary requirement for feasible battery operation, other parameters are equally importan...

Enhancing the reversible Li growth efficiency in "Li-free" solid-state batteries is key for the deployment of this technology. Here, we demonstrate a nanoscale material design path that enables the reversible cycling of a lithium-free solid-state battery, using Li7La3Zr2O12 (LLZO) electrolyte. By means of nanometric Ag-Cu bilayers, directly sputter...

The development of solid electrolytes has made significant progress in the last decade. Among the most promising materials, sulfide-based electrolytes show high ionic conductivities and low densities, and their precursors are abundant. For industrially relevant battery cells, sulfide electrolytes need to be processed to form thin electrolyte sheets...

Self-standing carbon fiber electrodes hold promise for solid-state battery technology owing to their networked structures improving interparticle connectivity, robustness contributing to mechanical integrity, and surface sites confining Li dendrites. We here evaluate carbonized 3D electrospun fibers filled with polymer electrolytes as anodes in sol...

Self-standing carbon fiber electrodes hold promise for solid-state battery technology owing to their networked structures improving interparticle connectivity, robustness contributing to mechanical integrity, and surface sites confining Li dendrites. We here evaluate carbonized 3D electrospun fibers filled with polymer electrolytes as anodes in sol...

Heat treatment of LLZO garnets can effectively remove lithium hydroxide and carbonate layers from its surface, increase the Li dynamics in the structure and improve the processing of composite polymer electrolytes for solid-state batteries.

LAGP solid electrolyte was successfully 3D printed by stereolithography, producing a corrugated shape, which reduced the area specific resistance and improved the durability during cycling.

Solid-state batteries represent a promising technology in the field of high-energy-density and safe storage systems. Improving the understanding of how defects form within these cells would greatly facilitate future development, which would be best served by applying nondestructive analytical tools capable of characterization of the key components...

Solid-state lithium metal batteries (SSLMBs) are considered an auspicious technology to develop high energy density and safe energy storage devices. The double layer polymer electrolyte (DLPE) is a rational approach for engineering high-performance SSLMBs addressing electrolyte requirements with specifically designed polymers at the positive electr...

Enabling the fast charge and discharge of Li-metal solid-state batteries paves the way towards their deployment in electro-mobility applications, which require high-energy and power with safety guaranteed. Solid-state batteries using polyethylene oxide as the polymer matrix are appealing candidates although currently limited to relatively slow rate...

Anode-free batteries (AFB) have attracted increasing interest in recent times because they allow the elimination of the conventional anode from the cell, exploiting lithium inventory from a lithiated cathode. This implies a much simpler, cost-effective, and sustainable approach. The AFB configuration with liquid electrolytes is being explored widel...

Solid-state Lithium-metal batteries based on polymer electrolytes hold the most promising prospect to face energy density and safety issues encountered by conventional Li-ion batteries. The use of two different polymers, one for the cathode and another one as electrolyte, brings a sufficient energy gap and chemical stability allowing compatibility...

The development of a promising Li metal solid-state battery (SSB) is currently hindered by the instability of Li metal during electrodeposition; which is the main cause of dendrite growth and cell failure at elevated currents. The replacement of Li metal anode by spinel Li4Ti5O12 (LTO) in SSBs would avoid such problems, endowing the battery with it...

The invention relates to a method for forming a Li-ion battery cell comprising a cathode material, an anode material, a separator and an electrolyte, the electrolyte comprising a mixture of a polyethylene oxide and an oxide of formula LivLasZnOn, characterised in that it comprises the following successive cycling steps: (a) at least two successive...

Using a new class of (BH4)- substituted argyrodite Li6PS5Z0.83(BH4)0.17, (Z = Cl, I) solid electrolyte, Li-metal solid-state batteries operating at room temperature have been developed. The cells were made by combining the modified argyrodite with an In-Li anode and two types of cathode: an oxide, Li x MO2 (M = ⅓ Ni, ⅓ Mn, ⅓ Co; so called NMC) and...

Using a new class of (BH4)- substituted argyrodite Li6PS5Z0.83(BH4)0.17, (Z = Cl, I) solid electrolyte, Li-metal solid-state batteries operating at room temperature have been developed. The cells were made by combining the modified argyrodite with an In-Li anode and two types of cathode: an oxide, LixMO2 (M = 1/3Ni, 1/3Mn, 1/3Co; so called NMC) and...

Solid State Batteries (SSBs) are the best candidates to overcome the safety and energy density drawbacks of conventional Li-ion. However, this technology is still relatively nascent in development and needs to offer competitive energy density so as to meet current demands of devices, especially those related to emerging electric vehicles. This work...

Un composé de formule Li7-xPS6-xXx-z(BH4)z dans lequel : X est choisi dans le groupe consistant en Cl, Br, I, F et CN 0 inf x=2 0 inf z=0,50. Ce composé peut être utilisé comme électrolyte solide d'un élément électrochimique lithium-ion.

Aluminum oxide (Al2O3) is a well‐known electrolyte filler for stabilizing Li‐metal (Li°) anode in all‐solid‐state Liº‐based batteries. However, its strong interaction with lithium polysulfides (PS) hinders the direct application of Al2O3‐added electrolytes in all‐solid‐state lithium‐sulfur batteries (ASSLSBs). Herein, the role of Al2O3 in ASSLSBs b...

This study reports on solid-state batteries operating at 120 °C prepared with metal hydride MH nanocomposites xMgH2+(1-x)TiH2 used as active materials for the positive electrode, metallic Li as the negative electrode and LiBH4 as the solid electrolyte. The molar content x of the MH nanocomposites ranged from 0.2 to 0.8. The electrochemical properti...

A metal hydride is used for the first time as anode in a complete all-solid-state battery with sulfur as cathode and LiBH4 as solid electrolyte. The hydride is a nanocomposite made of MgH2 and TiH2 counterparts. The battery exhibits a high reversible capacity of 910 mAh g⁻¹ with discharge plateaus at 1.8 V and 1.4 V. Moreover, the capacity remains...

The present work focuses on the development of a new eco-efficient chemical method for the polymerization of aziridine to hyperbranched polyethyleneimine (PEI) into mesoporous silica by using compressed CO2 as a solvent, reaction medium and catalyst. PEI was in situ grafted into MCM-41 and silica gel substrates, with pore diameters of 3.8 and 9.0 n...

We present here the results of a combined experimental-molecular simulations approach concerning the capacity for CO2 adsorption of aminosilica hybrid products synthesized using supercritical fluids. Two porous supports were examined for amine functionalization, an ordered mesoporous silica (MCM-41) and a disordered silica gel (SG40). The textural...

The overall objective of the present study was to modulate the surface characteristics of aerogel-like submicron and nanometric particles by coating them with polyethyleneimine (PEI) to suit specific biological applications. A new process for the covalent grafting of low-molecular weight PEI chains has been described, based on the use of compressed...

The current work builds on previous works on grafting of organosilanes on mesoporous silica supports using a supercritical CO2 anhydrous method, and it extends them by examining the capacity of supercritically prepared aminosilica hybrid products for CO2 adsorption and its separation from mixtures with other gases. The CO2 adsorption capacity under...

The present work focuses on the development of a new eco-efficient method, based on the use of compressed CO2 as a solvent, reaction medium and catalyst, for the in situ polymerization of ethyleneimine inside mesoporous silica.

Calcium based CO2 solid sorbents reveal a different efficiency of the carbonation/calcination cycle according to their origin, natural or synthetic, and the synthesis method. The objective of this research was to develop high-performance sorbents for CO2 capture at high temperature by using a supercritical method to precipitate CaCO3 precursors. Tw...

The present work examines the functionalization of silica supports via supercritical CO2 grafting of aminosilanes, which is an important step in the preparation of materials used as solid sorbents in CO2 capture. Four materials have been considered as solid supports: two commercially available silica gels (4.1 and 8.8 nm pore diameter), the mesopor...

doi: 10.1021/jp301947v

The internal surface of micro and nanoporous substrates can be modified in terms of charge, functionality or even reactivity or stability by means of bifunctional organic molecules able to self-assembly. This work investigates the impregnation with trialkoxysilanes of porous systems using supercritical carbon dioxide (scCO2) as a solvent, which com...

Trialcoxysilanes are bifunctional molecules widely used to obtain self-assembled coatings by the chemisorption route in liquid solvents. However, problems arise when the method is used for porous materials due to cross-linking of alkylsilanes in solution, which lead to multilayer deposition, non-uniform surface coverage and pore blocking. We prop...

In recent years social awareness and legal requirements have increased the concern about carbon dioxide capture, especially since the establishment of the reduction of their emission and the search for alternatives set by Kyoto's protocol and the IPCC reports. Traditionally industrial separation of CO2 is performed using aqueous amines. One of th...