School of Materials Science and Engineering , Shaanxi Normal University , 620 West Chang'an Street , Xi'an , Shaanxi 710119 , China.
ACS Appl Mater Interfaces. 2018 Mar 28;10(12):10087-10095. doi: 10.1021/acsami.7b19043. Epub 2018 Mar 14.
The development of compressible supercapacitor highly relies on the innovative design of electrode materials with both superior compression property and high capacitive performance. This work reports a highly compressible supercapacitor electrode which is prepared by growing electroactive NiCoS (NCS) nanosheets on the compressible carbon sponge (CS). The strong adhesion of the metallic conductive NCS nanosheets to the highly porous carbon scaffolds enable the CS-NCS composite electrode to exhibit an enhanced conductivity and ideal structural integrity during repeated compression-release cycles. Accordingly, the CS-NCS composite electrode delivers a specific capacitance of 1093 F g at 0.5 A g and remarkable rate performance with 91% capacitance retention in the range of 0.5-20 A g. Capacitance performance under the strain of 60% shows that the incorporation of NCS nanosheets in CS scaffolds leads to over five times enhancement in gravimetric capacitance and 17 times enhancement in volumetric capacitance. These performances enable the CS-NCS composite to be one of the promising candidates for potential applications in compressible electrochemical energy storage devices.
这篇文章报道了一种高度可压缩的超级电容器电极，它是通过在可压缩的碳海绵（CS）上生长电活性的 NiCoS（NCS）纳米片来制备的。金属导电 NCS 纳米片与高度多孔碳支架的强附着力使 CS-NCS 复合电极在反复的压缩-释放循环中表现出增强的导电性和理想的结构完整性。因此，CS-NCS 复合电极在 0.5 A g 的电流密度下具有 1093 F g 的比电容，并且在 0.5-20 A g 的范围内具有出色的倍率性能，电容保持率为 91%。在 60%应变下的电容性能表明，NCS 纳米片在 CS 支架中的掺入导致重量电容增加了五倍以上，体积电容增加了 17 倍。这些性能使 CS-NCS 复合材料成为可用于可压缩电化学储能器件的有前途的候选材料之一。
