Abstract This paper presented an effective method that utilized scrap rubber as the precursor to prepare porous activated carbons by the pyrolysis and KOH activation processes. Adjusting the activation temperature can tailor the textural characteristics of the resulting activated carbon, thus tuning the energy storage performance of the activated carbon, including methane storage behavior and electrochemical performance. The as-obtained carbon materials possessed hierarchical porous structure, and the methane adsorption data were analyzed by Langmuir, Langmuir-Freundlich and D-A models, respectively, among which the D-A model fitted the data best. The greatest storage capacity (110.39 mg/g, D-A model) was obtained for the sample AC-750 due to its highest SSA and abundant micropores. Furthermore, the hierarchical porous activated carbon electrode exhibited good rate performance (capacitance retention rate at above 86% as the charge/discharge current density increased by 40 times).

中文翻译：

---

从废橡胶转化的分层多孔碳用于甲烷储存和超级电容器电极

摘要 本文提出了一种以废橡胶为前驱体，通过热解和KOH活化工艺制备多孔活性炭的有效方法。调节活化温度可以调整所得活性炭的质构特性，从而调节活性炭的储能性能，包括甲烷储存行为和电化学性能。所得碳材料具有分级多孔结构，甲烷吸附数据分别采用Langmuir、Langmuir-Freundlich和DA模型进行分析，其中DA模型拟合数据最好。由于其最高的 SSA 和丰富的微孔，样品 AC-750 获得了最大的存储容量（110.39 mg/g，DA 模型）。此外，