Journal of the Taiwan Institute of Chemical Engineers ( IF 5.7 ) Pub Date : 2021-01-02 , DOI: 10.1016/j.jtice.2020.12.020 Maryam Ghasemi , Zohre Fahimi , Omran Moradlou , Mohammad Reza Sovizi
The potential window plays an important role in the performance of a supercapacitor and the gel polymer electrolyte (GPE) is the widespread interest in this context. GP electrolytes have high ionic conductivity, excellent electrochemical stability, and suitable ion transfer. So, in this work, the porous poly(acrylonitrile-polyhedral oligomeric silsesquioxane) (P(A-POS)) membrane electrolyte has been proposed for the metal oxide-based supercapacitors. The porous membrane was synthesized via the phase inversion process and after the liquid organic electrolyte uptake, it was used as GPE in Co3O4 nanoribbon/activated carbon asymmetric supercapacitor. The positive electrode based on Co3O4 nanoribbon (NR-Co3O4) offered a high specific capacitance of 2380.4 mF cm−2 at a current density of 2 mA cm−2 and the organic liquid electrolyte uptake of (P(A-POS)) membrane was 405%. The results indicated that the supercapacitor with NR-Co3O4 positive electrode and (P(A-POS)) porous membrane shows wide potential window of 4 V and low charge transfer resistance of 1.1 Ω in a solid-state asymmetric supercapacitor.
中文翻译:
用于宽电位窗的固态金属氧化物超级电容器的多孔凝胶聚合物电解质
潜在的窗口在超级电容器的性能中起着重要作用,而凝胶聚合物电解质(GPE)在这种情况下引起了广泛的关注。GP电解质具有高离子电导率,出色的电化学稳定性和合适的离子转移能力。因此,在这项工作中,已经提出了用于金属氧化物基超级电容器的多孔聚(丙烯腈-多面体低聚倍半硅氧烷)(P(A-POS))膜电解质。通过相转化法合成了多孔膜,吸收了液体有机电解质后,将其用作Co 3 O 4纳米带/活性炭不对称超级电容器中的GPE 。基于Co 3 O 4纳米带的正电极(NR-Co 3 O4)提供的2380.4 mF及其cm的高比电容-2在2毫安cm 2的电流密度-2和(P(A-POS))膜的有机液体电解质的吸收为405%。结果表明,在固态不对称超级电容器中,具有NR-Co 3 O 4正极和(P(A-POS))多孔膜的超级电容器显示4 V的宽电位窗口和1.1Ω的低电荷转移电阻。