Pinghua Zhang , Yangyang Li , Jian Xiao , Wenzhu Ouyang , Ligang Zhang , Dejin zhang , Guizhi Wang , Lin Liu , Youpeng Zuo , Chunsheng Wang , Chong Chen , Yunpeng Zhao
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引用次数: 0
Abstract
The capacitance performance of a co-doped carbon-based supercapacitor derived from Ginkgo nuts was significantly enhanced by optimizing the mesoporous structure through high-temperature pyrolysis combined with KOH activation. The precisely engineered GBHHPC-750-4 is characterized by a hyper-crosslinked 3D hierarchical porous structure, with an exceptionally high specific surface area of 3163.9 m2/g, a substantial mesopore proportion (Vmeso/Vt = 74.1 %), a broad pore size range of 2–10 nm, and elevated levels of heteroatom doping (3.4 at.% N, 8.3 at.% O, 1.6 at.% P). The symmetric supercapacitor based on the GBHHPC-750-4 electrode exhibits a peak specific capacitance of 256 F/g at 1 A/g, achieves an energy density of 118.2 Wh kg−1, maintains an impressive rate capability of 63.6 % across a wide current range (0.5–20 A/g) and demonstrates a prolonged cycle lifespan with 88.0 % capacitance retention after 5000 cycles in 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMIMBF4) electrolyte, emphasizing the substantial potential of the optimized mesoporous carbon material for energy storage applications.
通过高温热解结合KOH活化优化介孔结构,银杏碳基共掺杂超级电容器的电容性能得到了显著提高。精确设计的GBHHPC-750-4具有超交联三维层次多孔结构,具有3163.9 m2/g的超高比表面积,可观的介孔比例(Vmeso/Vt = 74.1%), 2-10 nm的宽孔径范围,高水平的杂原子掺杂(3.4 at。% N, 8.3 at。% O, 1.6 at。基于GBHHPC-750-4电极的对称超级电容器在1 a /g时的峰值比电容为256 F/g,能量密度为118.2 Wh kg-1,在宽电流范围(0.5-20 a /g)内保持了令人印象深刻的63.6%的倍率能力,并且在1-乙基-3-甲基咪唑双(三氟甲基磺酰基)亚胺(EMIMBF4)电解液中循环5000次后,显示出延长的循环寿命,58.0%的电容保留率。强调优化后的介孔碳材料在储能应用方面的巨大潜力。
期刊介绍:
The Journal of Colloid and Interface Science publishes original research findings on the fundamental principles of colloid and interface science, as well as innovative applications in various fields. The criteria for publication include impact, quality, novelty, and originality.
Emphasis:
The journal emphasizes fundamental scientific innovation within the following categories:
A.Colloidal Materials and Nanomaterials
B.Soft Colloidal and Self-Assembly Systems
C.Adsorption, Catalysis, and Electrochemistry
D.Interfacial Processes, Capillarity, and Wetting
E.Biomaterials and Nanomedicine
F.Energy Conversion and Storage, and Environmental Technologies