Activated oil sands fluid coke for electrical double-layer capacitors
Activated oil sands fluid coke for electrical double-layer capacitors
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双电层电容器用活性油砂流焦
DOI：
10.1016/j.jpowsour.2014.07.171
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发表时间：
2014-12
影响因子：
9.2
通讯作者：
Shitang Tong
中科院分区：
文献类型：
--
作者：
Jocelyn E. Zuliani;Donald W. Kirk;Charles Q. Jia;Shitang Tong
电化学电容器是重要的储能器件，具有高功率密度、快速充电周期和高度可循环性。在这项研究中，活化流态焦表现出高表面积、改进的电容特性和高能量密度。液态焦是连续高温沥青提质产生的副产品，导致形成具有同心碳层的近球形颗粒。流化焦中残留的硫杂质可以提高其储能性能。活性焦样品具有高达 1960 m2g−1 的高比表面积，在 4 M KOH 电解质中表现出良好的电容性能，其重量电容和比电容分别为 228–257 F g−1 和 13–14 μF cm−2。这些结果与其他性能最佳的活性炭材料相当[1-3]。活化的流体焦炭在快速充电速率下保持高性能，在 7500 mA g−1 的电流密度下大于 160 F g−1。活化流化焦的高电容和有前景的倍率性能可能与其独特的层状结构以及化学结构中适度的硫含量有关。活性液态焦是利用有限用途副产品生产具有高表面积和有前景的储能特性的活性炭的独特机会。
Electrochemical capacitors are important energy storage devices that have high power density, rapid charging cycles and are highly cyclable. In this study, activated fluid coke has demonstrated high surface area, improved capacitive properties, and high energy density. Fluid coke is a by-product generated from continuous high temperature bitumen upgrading, resulting in the formation of nearly spherical particles with concentric carbon layers. The residual sulphur impurities in fluid coke may enhance its energy storage performance. The activated coke samples have high specific surface areas, up to 1960 m2g−1, and show promising capacitive performance, in 4 M KOH electrolyte, with high gravimetric and specific capacitances of 228–257 F g−1and 13–14 μF cm−2, respectively. These results are comparable to other top performing activated carbon materials [1–3]. The activated fluid coke maintains high performance at fast charging rates, greater than 160 F g−1at a current density of 7500 mA g−1. Activated fluid coke's high capacitance and promising rate performance are potentially associated with its unique layered, and the moderate sulphur content in the chemical structure. Activated fluid coke is a unique opportunity to use a limited use by-product to generate activated carbon that has a high surface area and promising energy storage properties.
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影响因子：
17.1
作者：
Chenguang Zhang;Zhiwei Peng;Jian Lin;Yu Zhu;G. Ruan;Chih-Chau Hwang;W. Lu;R. Hauge;J. Tour-J.-To
通讯作者：
Chenguang Zhang;Zhiwei Peng;Jian Lin;Yu Zhu;G. Ruan;Chih-Chau Hwang;W. Lu;R. Hauge;J. Tour-J.-To
影响因子：
38.3
作者：
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通讯作者：
Tao, Nongjian
影响因子：
13.6
作者：
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通讯作者：
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影响因子：
7.5
作者：
Robert DiPanfilo;N. Egiebor
通讯作者：
Robert DiPanfilo;N. Egiebor
影响因子：
10.9
作者：
Caguiat, Johnathon N.;Kirk, Donald W.;Jia, Charles Q.
通讯作者：
Jia, Charles Q.