Scholarlink

<p>The scientific communities in both academia and industry are devoted to increasing energy density of supercapacitor devices, including investigating the relationship between carbon structure and capacitance of various activated carbon (AC) materials. However, most reported capacitance values are measured solely at the material level, which are difficult to directly translate into achievable energy densities for practical supercapacitor devices. In this work, we assemble supercapacitor pouch cells to reveal the insight relationships between the capacitance and porosity of AC materials and the optimal amount of electrolyte at the device level. Concurrently, a guidance on the required amount of electrolyte is provided, indicating that both the specific capacitance and porosity of AC materials collectively determine the energy density of a practical device (<i>E</i><sub>device</sub>). Furthermore, we develop a computational <i>E</i>-tool for directly predicting <i>E</i><sub>device</sub> at an early stage of material-level electrochemical testing. Finally, we propose a new descriptor (η) that incorporates both the capacitance and porosity parameters of AC materials, which displays a linear relationship with <i>E</i><sub>device</sub>. This study provides a reliable <i>E</i>-tool and η for accelerating the development of advanced charge storage mechanisms and carbon materials for practical supercapacitor devices.</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

Integrated Performance Metrics of Porous Carbon Toward Practical Supercapacitor Devices

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年1月26日

查看全文
  • Yuting Song,
  • Sicheng Fan,
  • Zerui Yan,
  • Dafu Tang,
  • Xiang Gao,
  • Jiawei Guo,
  • Yunlong Zhao,
  • Qiulong Wei

摘要

The scientific communities in both academia and industry are devoted to increasing energy density of supercapacitor devices, including investigating the relationship between carbon structure and capacitance of various activated carbon (AC) materials. However, most reported capacitance values are measured solely at the material level, which are difficult to directly translate into achievable energy densities for practical supercapacitor devices. In this work, we assemble supercapacitor pouch cells to reveal the insight relationships between the capacitance and porosity of AC materials and the optimal amount of electrolyte at the device level. Concurrently, a guidance on the required amount of electrolyte is provided, indicating that both the specific capacitance and porosity of AC materials collectively determine the energy density of a practical device (Edevice). Furthermore, we develop a computational E-tool for directly predicting Edevice at an early stage of material-level electrochemical testing. Finally, we propose a new descriptor (η) that incorporates both the capacitance and porosity parameters of AC materials, which displays a linear relationship with Edevice. This study provides a reliable E-tool and η for accelerating the development of advanced charge storage mechanisms and carbon materials for practical supercapacitor devices.