Tomšík Elena, Boahene Stephen, Dragounová Kateřina Aubrechtová, Pfeifer Rene, Sharma Dhananjay Kumar, Szabó Ondrej, Walterová Zuzana, Potocký Štěpán, Kromka Alexander
Institute of Macromolecular Chemistry AS CR, Heyrovsky nam. 2, Prague 6, 162 00, Czech Republic.
Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, Prague 6, 162 00, Czech Republic.
Small Methods. 2025 Apr;9(4):e2401523. doi: 10.1002/smtd.202401523. Epub 2025 Jan 5.
Understanding how to tune the properties of electroactive materials is a key parameter for their applications in energy storage systems. This work presents a comprehensive study in tailoring polyaniline (PANI) suspensions by acid-assisted polymerization method and their subsequent deposition on boron-doped diamond (BDD) supports with low/high B concentrations. The porous or densely packed morphology of PANI is successfully controlled by varying the monomer-to-initiator ratio. The interaction between PANI and BDDs leads to the shift in oxidation and reduction potentials, and the high B doping resulted in the reduction of the oxidation potentials. Notably, the highest specific capacitance of 958 F g, which represents 90% of the theoretical capacitance, is recorded for the support with relatively low B content. Moreover, PANI obtained by slow kinetic has a stronger interaction with the B-doped diamond support, which is confirmed by electrochemical impedance spectroscopy. This study provides valuable insights for optimizing PANI suspension preparation methods and selecting appropriate boron doping concentrations in nanodiamond supports for composite electrodes in energy storage applications.
了解如何调节电活性材料的性能是其在储能系统中应用的关键参数。这项工作通过酸辅助聚合法对聚苯胺（PANI）悬浮液进行了全面研究，并随后将其沉积在具有低/高硼浓度的硼掺杂金刚石（BDD）载体上。通过改变单体与引发剂的比例，成功控制了聚苯胺的多孔或致密堆积形态。聚苯胺与硼掺杂金刚石之间的相互作用导致氧化和还原电位发生偏移，高硼掺杂导致氧化电位降低。值得注意的是，对于硼含量相对较低的载体，记录到的最高比电容为958 F g，占理论电容的90%。此外，通过慢动力学获得的聚苯胺与硼掺杂金刚石载体的相互作用更强，这通过电化学阻抗谱得到了证实。该研究为优化聚苯胺悬浮液制备方法以及为储能应用中的复合电极选择纳米金刚石载体中合适的硼掺杂浓度提供了有价值的见解。
