Progress, Outlook, and Challenges in Lead-Free Energy-Storage Ferroelectrics

Zixiong Sun, Zhuo Wang, Ye Tian, Ge Wang, Wen Wang, Mengdie Yang, Xiaoying Wang, Fanghui Zhang, Yongping Pu

Research output: Contribution to journalArticlepeer-review


Abstract For energy-storage materials, dielectric capacitors exhibit higher power density than fuel cells, Li ion batteries, and super capacitors, giving them potentional for application in hybrid electric vehicles, high-speed trains, and even spaceplanes. However, their low energy-storage density (ESD) has limited their commercialization, which has therefore fallen behind the other three named systems to some extent. Because of this, a key factor in the development of dielectric/ferroelectric capacitors is an increase in ESD. Optimizing electrical breakdown strength and dielectric constant are regarded as two promising ways to achieve this. Five-state dielectric energy-storage materials are introduced and their respective merits and demerits are summarized. Enormous efforts, including the modification of preparation techniques, have been made to improve energy-storage performances in the past two decades; the significance of interface engineering is discussed in this context. Energy-storage density, efficiency, thermal stability with polarization fatigue, and mechanical fatigue are all optimized, demonstrating promising potential for practical applications.
Original languageEnglish
JournalAdvanced Electronic Materials
Issue number1
Publication statusPublished - 4 Dec 2019


  • energy storage
  • ferroelectrics
  • interface engineering


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