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Layer-Stacking Activated Carbon Derived from Sunflower Stalk as Electrode Materials for High-Performance Supercapacitors
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-08-01 00:00:00 , DOI: 10.1021/acssuschemeng.8b01334 Xiaodong Wang 1 , Sining Yun 1 , Wen Fang 1 , Chen Zhang 1 , Xu Liang 2 , Zhibin Lei 2 , Zonghuai Liu 2
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-08-01 00:00:00 , DOI: 10.1021/acssuschemeng.8b01334 Xiaodong Wang 1 , Sining Yun 1 , Wen Fang 1 , Chen Zhang 1 , Xu Liang 2 , Zhibin Lei 2 , Zonghuai Liu 2
Affiliation
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Recently, interest in the use of carbonaceous materials derived from sustainable biomass wastes for supercapacitors (SCs) has grown. The sustainable sunflower stalk is selected as the raw material for preparing activated carbon (AC), using a simple hydrothermal carbonization (HTC) combining an effective activation method. The as-prepared AC sample possesses a unique mesoporous layer-stacking structure which has an unexpected surface area up to 1505 m2 g–1 as well as a pore size of 3.6 nm on average. As an electrode material for SCs, the AC demonstrates high electrochemical storage capacity, with the excellent capacitances of 365 and 263 F g–1 measured by three-electrode and symmetrical SCs systems, respectively. An outstanding capacitance retention rate and a good stability value maintained after 15 000 cycles are close to 81 and 95%, respectively, which are obtained at a current density of 20 A g–1. Further, the symmetrical SCs exhibits an energy density as high as 35.7 Wh kg–1 under the condition of a power density up to 989 W kg–1. The electrochemical performances of AC derived from sunflower stalk are much higher than that reported in pervious literatures for other biomass. This work provides a clear, simple, and feasible synthetic path and strategy for converting sustainable waste biomass to activated carbons and also demonstrates that the biomass-derived carbon materials have the potential of high electrochemical performance in the field of energy storage, using different natural waste biomass types as raw materials.
中文翻译：
向日葵茎的层积活性炭作为高性能超级电容器的电极材料
近来，对于将来自可持续生物质废物的碳质材料用于超级电容器（SC）的兴趣日益增长。使用简单的水热碳化（HTC）结合有效的活化方法，选择可持续的向日葵秸秆作为制备活性炭（AC）的原料。所制备的AC样品具有独特的介孔层堆叠结构，其意外表面积高达1505 m 2 g –1，平均孔径为3.6 nm。作为SC的电极材料，AC具有很高的电化学存储容量，并具有365和263 F g –1的出色电容分别通过三电极和对称SC系统进行测量。在15,000次循环后，出色的电容保持率和良好的稳定性值分别接近81％和95％，这是在20 A g –1的电流密度下获得的。此外，对称的SC表现出的能量密度高达35.7瓦千克-1的功率密度高达989的条件下，w ^千克-1。葵花梗衍生的AC的电化学性能远高于其他生物质文献的报道。这项工作为将可持续的废物生物质转化为活性炭提供了清晰，简单和可行的合成途径和策略，还证明了生物质衍生的碳材料在使用不同的自然废物的储能领域中具有高电化学性能的潜力。以生物质为原料。
更新日期：2018-08-01
中文翻译：
向日葵茎的层积活性炭作为高性能超级电容器的电极材料
近来，对于将来自可持续生物质废物的碳质材料用于超级电容器（SC）的兴趣日益增长。使用简单的水热碳化（HTC）结合有效的活化方法，选择可持续的向日葵秸秆作为制备活性炭（AC）的原料。所制备的AC样品具有独特的介孔层堆叠结构，其意外表面积高达1505 m 2 g –1，平均孔径为3.6 nm。作为SC的电极材料，AC具有很高的电化学存储容量，并具有365和263 F g –1的出色电容分别通过三电极和对称SC系统进行测量。在15,000次循环后，出色的电容保持率和良好的稳定性值分别接近81％和95％，这是在20 A g –1的电流密度下获得的。此外，对称的SC表现出的能量密度高达35.7瓦千克-1的功率密度高达989的条件下，w ^千克-1。葵花梗衍生的AC的电化学性能远高于其他生物质文献的报道。这项工作为将可持续的废物生物质转化为活性炭提供了清晰，简单和可行的合成途径和策略，还证明了生物质衍生的碳材料在使用不同的自然废物的储能领域中具有高电化学性能的潜力。以生物质为原料。
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