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An effective interaction in polypyrrole/nickel phosphide (PPy/Ni 2 P) for high-performance supercapacitor
Journal of Solid State Electrochemistry ( IF 2.6 ) Pub Date : 2019-11-21 , DOI: 10.1007/s10008-019-04443-x
Shuling Liu , Yan Chen , Jing Ren , Yueyan Wang , Wei Wei

Polypyrrole/nickel phosphide (PPy/Ni2P) composites were synthesized through a facile two-step method. The results show that when there is 30% Ni2P in PPy/Ni2P (active material 3 mg), the prepared composites possess uniform morphology, which composed of large quantities of broccoli-like PPy microstructures (average dimension of about 200 nm) and Ni2P spherical particles (average diameters of 250 nm). It achieves a higher specific capacity for 476.5 F g−1 at a current density of 1 A g−1 in a three-electrode system, even after 3000 cycles the capacity maintained 89%. The excellent electrochemical performance of PPy/Ni2P composites may be due to the good dispersion and uniform morphology of Ni2P nanoparticles. In addition, the synergistic effect between PPy and Ni2P nanoparticles also dramatically improves the electrochemical properties of the composites.

The as-prepared PPy/Ni2P electrodes exhibit higher specific capacitance, smaller charge-transfer resistance, and superior cycle stability.



中文翻译:

聚吡咯/磷化镍(PPy / Ni 2 P)中的有效相互作用可形成高性能超级电容器

通过简便的两步法合成了聚吡咯/磷化镍(PPy / Ni 2 P)复合材料。结果表明,当PPy / Ni 2 P(活性物质3 mg)中Ni 2 P含量为30%时,制备的复合材料具有均匀的形貌,其由大量的西兰花状PPy微观结构组成(平均尺寸约为200 nm)。 )和Ni 2 P球形颗粒(平均直径250 nm)。在三电极系统中,在1 A g -1的电流密度下,即使达到476.5 F g -1,其比容量也更高,即使经过3000次循环,容量仍保持89%。PPy / Ni 2的优异电化学性能P复合材料可能是由于Ni 2 P纳米颗粒具有良好的分散性和均匀的形貌。此外,PPy和Ni 2 P纳米颗粒之间的协同作用还显着改善了复合材料的电化学性能。

所制备的PPy / Ni 2 P电极具有较高的比电容,较小的电荷转移电阻和优异的循环稳定性。

更新日期:2019-11-21
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