Influence of electrolyte concentration on the electrochemical characteristics of LaGaO3 perovskite oxide as novel anode material for Ni/MH batteries

Electronic, transport and optical properties in perovskite compound LaGaO3

“…All optical properties are calculated and illustrated in details, showing that our materiel is a good absorber at ultraviolet, and the reflectivity don't exceed 20% in the entire range of wavelength. From the transport properties we notice that LaGaO 3 is P-type materials with electrical conductivity varied from 0 (Ω.m.s) −1 at 0 K to 10×10 20 (Ω.m.s) −1 at 800 K.…”

“…The origin can be ascribed to oxygen vacancies [14], structural relaxation [15], polar discontinuity [16], intermixing at the interface [17] and cation nonstoichiometric [18]. Furthermore, the perovskite LaGaO 3 has a lot of scientific interest these last years because of its application in various field such as solid oxide fuel cells (SOFCs) [19], anode for rechargeable batteries [20] and also can be used as a substrate material for the epitaxial growth of high temperature superconducting thin films [21]. The LaGaO 3 perovskite oxide is crystallizes in orthorhombic structure with Pnma space group and transforms to rhombohedral symmetry at 145°C [22], the valence state of La and Ga is retain at (+3) in oxide, so when we doped LaGaO 3 [23] with cations that have a lower valence such as Mg or Ca, the concentration of oxygen vacancy can be substantially increased.…”

Influence of Nanomaterials and Other Factors on Biohydrogen Production Rates in Microbial Electrolysis Cells—A Review

“…The rate of bio-hydrogen production in the MEC is influenced by several main factors that affect the efficiency of the performance of the MEC, which are the shape and type of the MEC (double-chamber or single-chamber), the type of materials from which the electrodes are made (anode and cathode) and the raw materials or substrate used to produce bio hydrogen ( Figure 2 ) [ 16 , 17 ].…”

“…The anode used in the manufacture of MEC should be characterized by a large surface area, good biocompatibility to help in the formation of the bacterial biofilm, good ability to resist corrosion, high electrical conductivity, good chemical and physical stability, non-toxicity, environmentally friendly status, availability and cheap cost [ 16 ].…”

“…The transition metal compounds of the first row of the periodic table may be excellent substitutes for platinum (Pt) in the manufacture of cathodes in MEC because of their high catalytic capacity and stability of chemical and physical properties, as well as that they are abundant in nature [ 39 ]. Nickel and stainless steel are materials that have been widely used so far as cathodes in MEC due to their excellent catalytic ability, abundant availability in nature, stable chemical and physical properties and low cost [ 16 , 40 ].…”