Department of Materials Science Fudan University Shanghai 200433 China;
China Electric Power Research Institute Beijing 100192 China;
Department of Materials Science Fudan University Shanghai 200433 China;
Department of Materials Science Fudan University Shanghai 200433 China;
State Grid Anhui Electric Power Institute Hefei 230022 China;
China Electric Power Research Institute Beijing 100192 China;
China Electric Power Research Institute Beijing 100192 China;
Department of Materials Science Fudan University Shanghai 200433 China;
Ti_(0.87)O_(2)nanosheets; polypropylene(PP); freeze-drying; surface functionalization; hot-pressing; dielectric constant;