Synthesis by solid route and physicochemical characterizations of blends of calcium orthophosphate powders and mesoporous silicon particles.

The purpose of the study was to investigate the synthesis of economic calcium phosphate powders from recycled oyster shells, using a ball milling method. The oyster shell powder and a calcium pyrophosphate powder were used as starting materials and ball milled, then heat treated at 1,050°C for 5 h to produce calcium phosphate powders through a solid-state reaction. Electrochemically synthesized mesoporous silicon microparticles were then added to the prepared phosphate powders by mechanical mixer.

Nb and Cu co-doped (La,Sr)(Co,Fe)O: a stable electrode for solid oxide cells.

Solid oxide cells (SOCs) are electrochemical devices that convert the chemical energy of a fuel into electricity. With regard to electrodes, the development of materials with mixed conduction properties is a key issue for improving the performance of SOCs at high temperatures. New Cu and Nb co-doping La Sr Fe Co O (LSCF) materials were studied as electrode materials on yttria-stabilized zirconia (YSZ) supports.

P2-NaMnAlO and NaMnO Blend as Cathode Materials for Sodium-Ion Batteries Using a Natural β-MnO Precursor.

Sodium-ion batteries (NIBs) are promising candidates for specific stationary applications considering their low-cost and cost-effective energetic property compared to lithium-ion batteries (LIBs). Additional cost cutbacks are achievable by employing natural materials as active cathode materials for NIBs. In this work, we report the use of natural pyrolusite (β-MnO) as a precursor for the synthesis of a NaMnO blend (a mixture of layered P2-NaMnAlO without any doping technique combined with a post-spinel NaMnO without any high-pressure synthesis).

Towards valorizing natural coals in sodium-ion batteries: impact of coal rank on energy storage.

Coal samples of different ranks were investigated through various compositional, morphological/structural, and textural experiments prior to their electrochemical implementation in Na-ion half-cells. The purity of coals proved insignificant while distinctions in the flake size, pore width, pore distribution, I/I ratio, crystallite parameters (L and L) along with adjacent parameters, such as the R-empirical parameter, i.e.