Ag nanoparticles decorated perovskite La0.85Sr0.15MnO3 as electrode materials for supercapacitors

Ag nanoparticles decorated La0.85Sr0.15MnO3 was designed and used as electrode for supercapacitors firstly. Ag nanoparticles not only facilitate to accelerate charge transfer but also contribute a small amount of pseudocapacitance. It shows a high specific capacitance of 186 F·g−1 at 1 A·g−1 and excellent cycling performance. When assembled asymmetric supercapacitor, it possesses maximum energy density of 20.6 Wh·kg−1 at power density of 1700 W·kg−1 within the wide potential window of 1.7 V, as well as 13.4 Wh·kg−1 at 8500 W·kg−1. This work could prompt the development and application of high conductivity nanoparticles modified perovskite in supercapacitors.