What are the practical limits for the specific surface area and capacitance of bulk sp(2) carbon materials?
What are the practical limits for the specific surface area and capacitance of bulk sp(2) carbon materials?
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大块 sp(2) 碳材料的比表面积和电容的实际限制是什么？
DOI：
10.1007/s11426-015-5474-y
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
Zh
中科院分区：
文献类型：
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作者：
Lu Yanhong;Lu Yanhong;Long Guankui;Zhang Long;Zhang Tengfei;Zhang Mingtao;Zhang Fan;Yang Yang;Ma Yanfeng;Chen Yongsheng;Lu Yanhong;Long Guankui;Zhang Long;Zhang Tengfei;Zhang Mingtao;Zhang Fan;Yang Yang;Ma Yanfeng;Chen Yongsheng;Lu Yanhong;Long Guankui;Zh
通过实验和理论研究，探讨了sp2碳材料的比表面积和电容性能的实际极限。我们发现比表面积的极限为3500-3700 m2 g −1，并在此基础上预测了各种电解质体系的相应最佳电容。提出了一种使用电解质离子的有效离子直径的模型，并用于计算理论电容。实验电容与有效比表面积的各种sp2碳材料的线性关系，得到所有研究的离子液体，有机和水电解质体系。此外，所有测试的sp2碳材料在这些电解质体系中的理论和实验电容之间的良好的协议，观察表明该模型可以广泛应用于各种碳材料的超级电容器的评估。
The possible practical limits for the specific surface area and capacitance performance of bulk sp2carbon materials were investigated experimentally and theoretically using a variety of carbon materials. We find the limit for the specific surface area to be 3500–3700 m2g−1, and based on this, the corresponding best capacitance was predicted for various electrolyte systems. A model using an effective ionic diameter for the electrolyte ions was proposed and used to calculate the theoretical capacitance. A linear dependence of experimental capacitance versus effective specific surface area of various sp2carbon materials was obtained for all studied ionic liquid, organic and aqueous electrolyte systems. Furthermore, excellent agreement between the theoretical and experimental capacitance was observed for all the tested sp2carbon materials in these electrolyte systems, indicating that this model can be applied widely in the evaluation of various carbon materials for supercapacitors.