Lead-free ceramic energy storage overcomes high energy storage density/ high breakdown strength (voltage resistance) trade-off

https://www.eurekalert.org/news-releases/1126217

"A/B-site multi-ion co-doping modifies barium titanate-based ceramics... A-site doping induces simultaneous cubic, tetragonal, rhombohedral nanoclusters facilitating polarization under electric field/ quick return to neutral state (less energy loss)... B-site tantalum ion doping induces crystal lattice contraction increasing grain boundary activation energy, blocking charge carriers/ enabling higher voltages... 15.3 J/cm^3 recoverable energy density... high-performance pulse power capacitors"