Controlling the Effective Surface Area and Pore Size Distribution of sp2 Carbon Materials and Their Impact on the Capacitance Performance of These Materials
Controlling the Effective Surface Area and Pore Size Distribution of sp2 Carbon Materials and Their Impact on the Capacitance Performance of These Materials
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DOI：
10.1021/ja402552h
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发表时间：
2013-04-17
影响因子：
15
通讯作者：
Chen, Yongsheng
中科院分区：
文献类型：
--
作者：
Zhang, Long;Yang, Xi;Chen, Yongsheng
采用一种简便、低成本的方法，大规模合成了一系列具有不同比表面积和可控孔径分布的sp（2）碳材料。通过采用不同的碳源和制备方法控制了这些炭材料的SSA和PSD。研究了不同的总有效比表面积（E-SSA）和比表面积（PSD）对电容性能的影响，结果表明E-SSA和PSD对电容性能的影响最大。此外，对E-SSA和PSD对电容性能的影响进行了理论建模，其结果与实验结果一致。在此基础上，提出了一种基于狭缝/圆柱NL-DFT方法的sp（2）碳材料比电容估算的通用模型，为预测此类材料的电容性能提供了一种简单可靠的方法，从而加快了高性能超级电容器及其他表面积相关器件材料的设计和筛选。
A series of sp(2) carbon materials with different specific surface area (SSA) and controlled pore size distribution (PSD) were synthesized at large scale through a facile and low-cost method. The SSA and PSD of these carbon materials were controlled by using different carbon sources and preparation methods. With different total and effective SSA (E-SSA) and PSD, the impacts on their capacitance performance were investigated thoroughly, which demonstrated that both E-SSA and PSD played the most important roles in their capacitance performance. Furthermore, theoretical modeling was performed, and the results are in agreement with the experimental results for the influence of E-SSA and PSD on their capacitance performance. Based on these, a general model using the slit/cylindrical NL-DFT approach is proposed for the estimation of the specific capacitance of sp(2) carbon materials, which offers a simple but reliable method to predict the capacitance performance of these materials, thus speeding up the design and screening of the materials for high-performance supercapacitor and other surface area related devices.