Synthesis of Two-Dimensional Sr-Doped LaNiO3 Nanosheets with Improved Electrochemical Performance for Energy Storage

Designing a novel, efficient, and cost-effective nanostructure with the advantage of robust morphology and outstanding conductivity is highly promising for the electrode materials of high-performance electrochemical storage device. In this paper, a series of honeycombed perovskite-type Sr-doped LaNiO3 nanosheets with abundant porous structure were successfully synthesized by accurately controlling the Sr-doped content. The study showed that the optimal LSNO-0.4 (La0.6Sr0.4NiO3-delta) electrode exhibited excellent electrochemical performance, which showed a high capacity of 115.88 mAh g(-1) at 0.6 A g(-1). Furthermore, a hybrid supercapacitor device (LSNO//AC) based on LSNO-0.4 composites and activated carbon (AC) showed a high energy density of 17.94 W h kg(-1), a high power density of 1600 W kg(-1), and an outstanding long-term stability with 104.4% capacity retention after 16,000 cycles, showing an excellent electrochemical performance and a promising application as an electrode for energy storage.

Automated summary

A series of honeycombed perovskite-type Sr-doped LaNiO3 nanosheets were successfully synthesized with abundant porous structure, showing excellent electrochemical performance and high cycling stability. This novel electrode material exhibits promising potential for energy storage applications.