TY - JOUR AU - Yang, Xiaojun AU - Xu, Kaibing AU - Zou, Rujia AU - Hu, Junqing PY - 2015/10/15 Y2 - 2024/03/29 TI - A Hybrid Electrode of Co3O4@PPy Core/Shell Nanosheet Arrays for High-Performance Supercapacitors JF - Nano-Micro Letters JA - Nano-Micro Lett VL - 8 IS - 2 SE - Articles DO - 10.1007/s40820-015-0069-x UR - https://nmlett.org/index.php/nml/article/view/399 SP - 143-150 AB - <p>Herein, combining solverthermal route and electrodeposition, we grew unique hybrid nanosheet arrays consisting of Co<sub>3</sub>O<sub>4</sub> nanosheet as a core, PPy as a shell. Benefiting from the PPy as conducting polymer improving an electron transport rate as well as synergistic effects from such a core/shell structure, a hybrid electrode made of the Co<sub>3</sub>O<sub>4</sub>@PPy core/shell nanosheet arrays exhibits a large areal capacitance of 2.11&nbsp;F&nbsp;cm<sup>−2</sup> at the current density of 2&nbsp;mA&nbsp;cm<sup>−2</sup>, a ~4-fold enhancement compared with the pristine Co<sub>3</sub>O<sub>4</sub> electrode; furthermore, this hybrid electrode also displays good rate capability (~65&nbsp;% retention of the initial capacitance from 2 to 20&nbsp;mA&nbsp;cm<sup>−2</sup>) and superior cycling performance (~85.5&nbsp;% capacitance retention after 5000 cycles). In addition, the equivalent series resistance value of the Co<sub>3</sub>O<sub>4</sub>@PPy hybrid electrode (0.238&nbsp;Ω) is significantly lower than that of the pristine Co<sub>3</sub>O<sub>4</sub> electrode (0.319&nbsp;Ω). These results imply that the Co<sub>3</sub>O<sub>4</sub>@PPy hybrid composites have a potential for fabricating next-generation energy storage and conversion devices.</p> ER -