Optimizing Nickel Doping in La0.7Sr0.3Ti0.15Fe0.85- xNixO3-δ Perovskite as a Potential Cathode Material for LT-SOFCAhmadani Darul Fikri, Markus Diantoro, Hartatiek, Della Puspita Rahmadhani, Ishmah Luthfiyah and NasikhudinE3S Web Conf., 695 (2026) 01009DOI: https://doi.org/10.1051/e3sconf/202669501009