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Relaxor ferroelectrics (RFEs) are being actively investigated for energy‐storage applications due to their large electric‐field‐induced polarization with slim hysteresis and fast energy charging–discharging capability. Here, a novel nanograin engineering approach based upon high kinetic energy deposition is reported, for mechanically inducing the RFE behavior in a normal ferroelectric Pb(Zr0.52Ti0.48...
High Energy Density Capacitors
In article number 2302554, Long‐Qing Chen, Shashank Priya, Dae‐Yong Jeong, Jungho Ryu, and co‐workers reveal a giant energy storage density of over 120 J cm−3 with an ultrahigh breakdown strength of 540 MV m−1 (equivalent to the breakdown strength of ferroelectric polymers) in a nanograin engineered PZT thick film. The nano‐grain architecture composite microstructure...