An overview and prospective on Al and Al-ion battery technologies

Aluminum batteries are considered compelling electrochemical energy storage systems because of the natural abundance of aluminum, the high charge storage capacity of aluminum of 2980 mA h g−1/8046 mA h cm−3, and the sufficiently low redox potential of Al3+/Al. Several electrochemical storage technologies based on aluminum have been proposed so far. This review classifies the types of reported Al-batteries into two main groups: aqueous (Al-ion, and Al-air) and non-aqueous (aluminum graphite dual-ion, Al-organic dual-ion, Al-ion, and Al-sulfur). Specific focus is given to Al electrolyte chemistry based on chloroaluminate melts, deep eutectic solvents, polymers, and “chlorine-free” formulations

Metallic Nanoparticles and Proton Conductivity: Improving Proton Conductivity of BaCe 0.9 Y 0.1 O 3−δ Using a Catalytic Approach

International audienc

Metallic Nanoparticles and Proton Conductivity: Improving Proton Conductivity of BaCe0.9Y0.1O3- and La0.75Sr0.25Cr0.5Mn0.5O3- by Ni-doping

International audienc

Metallic Nanoparticles and Proton Conductivity: Improving Proton Conductivity of BaCe_0.9Y_0.1O_3−δ Using a Catalytic Approach

In this work, we have used nickel nanoparticles to improve proton conductivity of the electrolyte BaCe_0.9Y_0.1O_3−δ (BCY). Ni nanoparticles were dissolved into the compounds as their oxidized form (BaCe_{0.9–<i>x</i>}Y_0.1Ni_<i>x</i>O_3−δ) and precipitated upon heating under a reducing atmosphere. Below 700 °C, proton conductivity is enhanced under a reducing atmosphere. An increase of 1 order of magnitude, with respect to BCY, was observed for BaCe_0.7Y_0.1Ni_0.2O_3−δ (1.7 × 10^–2 S/cm at 500 °C). This phenomenon is more pronounced for the compounds containing more nickel on the surface, which can facilitate the dissociation of hydrogen and the incorporation of protons in the structure. Under reducing atmosphere, nickel doping enhances both bulk and grain boundaries conductivities and the blocking effect appear at lower temperature