A NiCo₂S₄@PPy series with sheet stacking structure and suitable pore size distribution is successfully synthesized through a one‐step vulcanization process and polymerization process. Interestingly, the abundant sites and large electroactive surface area of NiCo₂S₄@PPy stacking structure are formed via the “etching effect” of S²⁻ ions and ultrasonic oscillation effect, which render the morphology of NiCo₂S₄@PPy with a lamellar feature. In contrast, polypyrrole (PPy) with good conductivity provides favorable electron transport pathways for electrolyte ions. The as‐prepared sheet stacking structure NiCo₂S₄@PPy (NCSP‐3) electrode delivers good electrochemical properties with the highest specific capacitance of 1606.6 F g⁻¹ at 1 A g⁻¹ and excellent rate performance of 77.4% at high discharge rate of 10 A g⁻¹. Furthermore, the NCSP‐3 electrode exhibits remarkable cycling stability, where the ultimate specific capacitance has no attenuation (retained at around 100%) compared with its incipient value after 20 000 cycles even at 20 A g⁻¹. These promising results can be put down to the unique structure and synergetic effect of NiCo₂S₄ and PPy, which ensure good conductivity, more redox reactions, as well as large specific surface area. This work has guiding significance for the general and low‐cost route design of high‐performance electrode materials for supercapacitor applications.

中文翻译：

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用于水超级电容器的片状堆叠结构NiCo2S4 @ PPy的快速合成，具有增强的速率能力和循环性能

甲镍钴₂小号₄ @PPy串联片堆叠结构和适宜的孔径分布是通过一步法硫化工艺和聚合工艺成功合成。有趣的是，通过S ^2-离子的“蚀刻效应”和超声振荡效应形成了NiCo ₂ S ₄ @PPy堆积结构的大量位点和较大的电活性表面积，从而使NiCo ₂ S ₄ @PPy的形貌呈现出一定的形状。层状特征。相反，具有良好电导率的聚吡咯（PPy）为电解质离子提供了良好的电子传输途径。准备好的板材堆叠结构NiCo ₂ S ₄@PPy（NCSP-3）电极提供与1606.6 F G的最高比电容良好的电化学性质^-1 1 A G ^-1，并以10甲克高放电率的77.4％优良率性能^-1。此外，NCSP-3电极具有出色的循环稳定性，即使在20 A g ^{-1的条件下，}与20000次循环后的初始值相比，最终比电容也没有衰减（保持在100％左右）。这些有希望的结果可以归结为NiCo ₂ S ₄的独特结构和协同作用和PPy，可确保良好的导电性，更多的氧化还原反应以及较大的比表面积。这项工作对于用于超级电容器应用的高性能电极材料的常规和低成本路线设计具有指导意义。