Iron Oxides/Hydroxides TRIZ Cases

An iron-coated Ni-Al core-shell precursor suppresses surface aluminum richness and raises lithium-ion battery discharge capacity without cobalt.

Selective removal of copper and iron plus controlled aluminum content enables recycled cathodes to match typical Li-ion battery performance.

High-purity γ-FeOOH in a lithium-sulfur cathode adsorbs polysulfides, improving discharge capacity and extending battery life.

Hydrothermal treatment of complexed iron and cobalt salts yields 5-50 μm cobalt ferrite particles with narrow size distribution at lower energy input.

Controlled AMO surface acidity boosts battery capacity and cycle life while avoiding electrolyte decomposition, gas generation, and component damage.

Electron-withdrawing groups tune metal oxide nanoparticle acidity to boost lithium uptake and cyclability without triggering electrolyte breakdown.

Controlled acidity on metal oxide cathodes boosts lithium battery capacity and cycle life without triggering electrolyte decomposition or component damage.

Controlled surface acidity on metal oxide nanoparticles boosts battery capacity and cycle life while limiting electrolyte breakdown and gas generation.

Controlled AMO surface acidity boosts battery capacity and cycle life while avoiding electrolyte decomposition and component degradation.

Controlled surface acidity on acidified metal oxide cathodes boosts lithium battery capacity and cycle life without triggering degradation or gas generation.

Oxygen-vacancy disordered rock salt cathodes avoid fluorination hazards while improving lithium conductivity, capacity, and scalability.

Controlled ferrite particle size and sphericity improve hole filling, storage stability, magnetic permeability, and low-loss curing.

Staged pH adjustment, alkaline leaching, and carbonation recover goethite and aluminum hydroxide from NCM solution while avoiding hazardous slag.

A three-zone chlorination process separates vanadium and iron from ore while recycling CO2 to CO, cutting emissions and improving recovery.

Poor phase homogeneity and uncontrolled grain growth are addressed through molecular sol-gel mixing and controlled combustion in this multiphase nanocomposite.

Microwave irradiation creates nanostructured high entropy oxides with more active surface area for stable, reproducible cortisol sensing.

A cuprous borate precipitate is filtered, pulverized, and oxidized to produce copper oxide nanoparticles with controlled size and high yield.