简 历：王根水，中国科学院上海硅酸盐研究所研究员、博士生导师，中国科学院无机功能材料与器件重点实验室副主任，入选中国科学院“百人计划”。主要从事铁电压电材料与器件研究：包括铁电、反铁电、热释电、无铅压电陶瓷及磁电复合材料与器件等。承担了国家自然科学基金委、科技部等及中国科学院、上海市等30余项科研项目。发表SCI 论文300余篇，授权中国发明专利50余项。获得柳大纲优秀青年科技奖，担任《无机材料学报》副主编、上海市红外与遥感学会副理事长。
摘 要：Lead-free ferroelectric ceramics were widely investigated in recent years due to environment requirements. Among all lead-free ferroelectric ceramics system, bismuth sodium titanate (Bi0.5Na0.5)TiO3(BNT) were investigated as an alternative lead-free candidate for energy storage and conversion applications, in view of its high remanent polarization, high break down electric field, high mechanical strength, high Curie temperature (Tc), and relatively low density. Some additive such as BiAlO3, BaTiO3, NaNbO3 and Ba(Nb,Ni)O3 were added in BNT system to improve the performance for energy storage and conversion application. The energy storage properties were investigated with temperature, electric field and frequency. Two kind of energy storage work mode were proposed in BNT ceramics component. For poled BNT ceramics, very good energy conversion performance can be obtained, such as excellent pyro-electric effect and huge force-electric effect are observed, especially, the NBT ferroelectric ceramics could be fully depolarized by compression and generate a giant power output (300 MW/kg). This power output is mainly attributed to polar-nonpolar phase transition under high pressure. These results show BNT ceramic is very potential for energy storage and conversion applications.