微型多孔材料
石英晶体微天平
超级电容器
零电荷点
纳米孔
碳纤维
电化学
化学工程
吸附
材料科学
电容
微观结构
电极
化学
纳米技术
复合材料
物理化学
工程类
复合数
作者
Huan Yin,Hui Shao,Barbara Daffos,Pierre‐Louis Taberna,Patrice Simon
标识
DOI:10.1016/j.elecom.2022.107258
摘要
The electrochemical quartz crystal microbalance (EQCM) technique has been used to study the charge mechanisms in two TiC-derived nanoporous carbons (CDC), synthesized at 800 ℃ and 1100 ℃. These two carbons have a similar pore size and porous volume, but the CDC prepared at 1100 °C shows a more graphitic microstructure. The EQCM study revealed that the charge storage mechanism in the CDC-800 is mainly controlled by a counter-ion adsorption process, while an expanded ion-exchange process was observed for the CDC-1100. Combined with the potential of zero charge (PZC), these measurements suggest a strong interaction between the anions and graphitic carbon. For the first time, we provide experimental evidence that the local carbon structure affects the charge storage mechanism of the electrical double-layer capacitance in high surface area porous carbons.
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