Scholarlink

<p>High-capacitance and high-rate performance supercapacitors with long cycling life play an important role in the constructing of efficient energy storage systems. In this study, petroleum asphalt was converted into hierarchically porous carbon (HPC) through a template-directing-coupled in situ activation method. Benefiting from the high specific surface area (2619.49 m<sup>2</sup>&#xa0;g<sup>−1</sup>) and interconnected, hierarchical porous structure, HPC exhibited significantly improved capacitive behavior compared to counterparts guided only by template-directing or derived from chemical activation or commercial materials. In the aqueous electrolyte, the capacitance retention of the supercapacitor exceeded 99% after 30,000 cycles, while in the organic electrolyte, the capacitance loss was no more than 5% after 50,000 cycles. This study demonstrates that KOH activation combined with MgO templates can serve as an efficient route for preparing high-performance porous carbon for supercapacitors.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

One-step preparation of hierarchically porous carbon from petroleum asphalt for high-performance supercapacitors

  • 期刊论文

  • 发表日期：

    2025年6月27日

查看全文
  • Yuqi Cao,
  • Shengping Li,
  • Chuanlei Qi,
  • Haipeng Song,
  • Yuting Cao,
  • Zhuo Chen,
  • Zhimin Yu,
  • Hang Yang,
  • Chongzhi Huang,
  • Jingman Lu,
  • Yindong Liu,
  • Luhai Wang

摘要

High-capacitance and high-rate performance supercapacitors with long cycling life play an important role in the constructing of efficient energy storage systems. In this study, petroleum asphalt was converted into hierarchically porous carbon (HPC) through a template-directing-coupled in situ activation method. Benefiting from the high specific surface area (2619.49 m2 g−1) and interconnected, hierarchical porous structure, HPC exhibited significantly improved capacitive behavior compared to counterparts guided only by template-directing or derived from chemical activation or commercial materials. In the aqueous electrolyte, the capacitance retention of the supercapacitor exceeded 99% after 30,000 cycles, while in the organic electrolyte, the capacitance loss was no more than 5% after 50,000 cycles. This study demonstrates that KOH activation combined with MgO templates can serve as an efficient route for preparing high-performance porous carbon for supercapacitors.