Subramani Kaipannan, Shunmugasundaram Shanmugam, Duraisamy Velu, Ilavarasi Rajaji, Murugesan Senthil Kumar Sakkarapalayam, Sathish Marappan
Electrochemical Power Sources Division (ECPS), CSIR-Central Electrochemical Research Institute, Karaikudi, Tamil Nadu 630 003, India.
Nanotechnology Division, Department of Electronics and Communication Engineering, Periyar Maniammai Institute of Science & Technology, Vallam, Thanjavur, Tamil Nadu 613 403, India.
J Colloid Interface Sci. 2022 Jan 15;606(Pt 1):286-297. doi: 10.1016/j.jcis.2021.08.002. Epub 2021 Aug 4.
Porous carbon (PC) based materials is a proficient impetus for upgrading supercapacitor thanks to its traits of high surface area, meso, micropores, and replication morphology. Mainly, single and dual heteroatom doping in PC material is one of the amazing strategies for enhancing the supercapacitor activity due to the interaction of carbon and heteroatom material along with the excessive contribution of by functional groups. Here, we have synthesized nitrogen (N) and boron (B) dual doped PC (NBPC) with the assistance of Santa Barbara Amorphous (SBA-15) silica material and afterward investigated their doping impact of the heteroatom which is investigated for supercapacitor application. Among all, NBPC material delivered a high specific capacitance of 375 F/g at 2 A/g current density in 1 M HSO electrolyte with excellent rate capability and capacitance retention. Such an attractive property of NBPC is a reflection of its high specific surface area (809 m/g) rendered by N and B functional groups. In addition, the introduction of dual redox additive materials to the electrolyte synergistically enhanced the specific capacity of the symmetric supercapacitor cell. An unprecedented high specific capacity of 929 C/g at 3 A/g current density is observed and a 56% of initial specific capacity was retained when current density increased to 20 A/g. The fabricated symmetric cell using NBPC electrode in 1 M HSO + 0.01 M ammonium metavanadate + Ferrous (II) sulfate dual redox additive electrolyte delivered an energy density of 48.4 W h/kg which is five folds higher than the bare electrolyte (10.1 W h/kg). Similarly, the NBPC electrode delivered a power density of 15 kW/kg in the redox additive electrolyte which is three folds higher than the bare electrolyte (5 kW/kg).
基于多孔碳（PC）的材料因其高比表面积、中孔、微孔和复制形态等特性，是提升超级电容器性能的有效推动力。主要而言，PC材料中的单杂原子和双杂原子掺杂是增强超级电容器活性的惊人策略之一，这归因于碳与杂原子材料之间的相互作用以及官能团的额外贡献。在此，我们借助圣巴巴拉无定形（SBA - 15）二氧化硅材料合成了氮（N）和硼（B）双掺杂PC（NBPC），随后研究了其杂原子的掺杂影响，并将其用于超级电容器应用。其中，NBPC材料在1 M HSO电解液中，2 A/g电流密度下展现出375 F/g的高比电容，具有出色的倍率性能和电容保持率。NBPC这种吸引人的特性反映了其由N和B官能团赋予的高比表面积（809 m/g）。此外，向电解液中引入双氧化还原添加剂材料协同增强了对称超级电容器电池的比容量。在3 A/g电流密度下观察到前所未有的929 C/g的高比容量，当电流密度增加到20 A/g时，仍保留了56%的初始比容量。使用NBPC电极在1 M HSO + 0.01 M偏钒酸铵 + 硫酸亚铁双氧化还原添加剂电解液中制备的对称电池，其能量密度为48.4 W h/kg，比纯电解液（10.1 W h/kg）高出五倍。同样，NBPC电极在氧化还原添加剂电解液中的功率密度为15 kW/kg，比纯电解液（5 kW/kg）高出三倍。
