超级电容器
电容
生物炭
环境友好型
复合数
化学工程
材料科学
氧化钴
储能
电解质
分离器(采油)
纳米技术
氧化物
化学
电极
复合材料
冶金
热解
物理
生态学
功率(物理)
热力学
物理化学
量子力学
工程类
生物
作者
Akhil Pradiprao Khedulkar,Yu Wang,Van Dien Dang,Bidhan Pandit,Ruey‐an Doong
标识
DOI:10.1016/j.est.2023.110302
摘要
In this study, we present a novel composite material known as Cobalt oxide/orange peel-derived biochar (CoNF@OBC), which exhibits a distinctive flower-like structure and showcases exceptional potential for high-performance supercapacitors. The CoNF@OBC composite is created by employing Co(OH)2 as a supporting material. The inherent hierarchical and porous structure of CoNF@OBC facilitates efficient flow and dispersion of ions and electrons within the electrolyte. This structural advantage results in shorter diffusion pathways and enhanced conductivity, rendering CoNF@OBC highly suitable for energy storage applications. Remarkably, CoNF@OBC demonstrates an ultra-high specific capacitance of 563 F g−1 at a current density of 1 A g−1, with an outstanding capacitance retention of 96 % even after undergoing 10,000 charge-discharge cycles. When integrated into a device, CoNF@OBC yields a specific capacitance of 124 F g−1. Furthermore, the Ragone plot for the symmetric device reveals an energy density ranging from 10 to 41 Wh kg−1, accompanied by power densities spanning from 811 to 5143 W kg−1. This remarkable performance highlights the extensive potential of CoNF@OBC in practical applications, supported by its long-term cyclic stability of 92 % after 10,000 charge-discharge cycles. This study underscores the sustainability aspect of utilizing agricultural waste, such as orange peels, as eco-friendly carbon sources. By combining these waste materials with various metal hydroxides for eco-friendly supercapacitor electrodes, promoting sustainable energy storage solutions.
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