High Energy Storage Performance of PZO/PTO Multilayers via Interface Engineering

Authors：Zhang, Yuanyuan^*; Chen, Qianqian; Qi, Ruijuan; Shen, Hao; Sui, Fengrui; Yang, Jing; Bai, Wei; Tang, Xiaodong^*; Chen, Xuefeng; Fu, Zhengqian; Wang, Genshui; Zhang, Shujun

Source：ACS applied materials & interfaces, 2023.

DOI：10.1021/acsami.2c21202

• multilayer
• energy storage
• antiferroelectric
• interface engineering
• PZO
• PTO

Antiferroelectric thin-film capacitors with ultralow remanent polarization and fast discharge speed have attracted extensive attention for energy storage applications. A multilayer heterostructure is considered to be an efficient approach to enhance the breakdown strength and improve the functionality. Here, we report a high-performance multilayer heterostructure (PbZrO3/PbTiO3)n with a maximum recoverable energy storage density of 36.4 J/cm3 due to its high electric breakdown strength (2.9 MV/cm) through the heterostructure strategy. The positive effect of interfacial blockage and the negative effect of local strain defects competitively affect the breakdown strength, showing an inflection point at n = 3. The atomic-scale characterizations reveal the underlying microstructure mechanism of the interplay between the heterointerface dislocations and the decreased energy storage performance. This work offers the potential of well-designed multilayers with high energy storage performance through heterostructure engineering.

• Institution
  中国科学院