Interface engineering for sulfide solid-state batteries with TiNb2O7 anodes, vacancy defect-optimized silicon-carbon composites, and Ti-doped cathode surface supplements to compensate anode irreversible capacity losses
Key advances include solid-state interface engineering with fibrillated PTFE intermediate layers enabling TiNb2O7 oxide anodes, dual-binder SEBS slurry systems for mechanically robust sulfide separators, and silver nanoparticles in polymer electrolyte layers suppressing dendrite penetration. Silicon anode manufacturing advances through controlled vacancy defect engineering via dual alkaline-gaseous activation, continuous transport reactor CVD with optimized thermal control, and dual-particle systems with silicon coating bridges. Cathode synthesis innovation progresses via Ti-doped lithium carbonate surface supplements, trivalent Fe-doping reducing Mn dissolution by 5× in spinel LNMO, and optimized sintering protocols achieving high Ni oxidation ratios in NCM811.
