# Pitch-Based Activated Carbon Fibers: Activation Influences and Supercapacitor Applications

## TL;DR

This review discusses how pitch-based activated carbon fibers can be used in supercapacitors, focusing on how porosity affects their performance.

## Contribution

The paper highlights the need for alternative techniques to activation for pore introduction and standardized performance reporting.

## Key findings

- Pitch-based carbon fibers are primarily modified through activation to introduce porosity.
- Porosity significantly enhances the performance of these fibers in supercapacitors.
- Standardized protocols for performance reporting are needed for better future comparisons.

## Abstract

Pitch-based activated carbon fibers, recognized for their excellent electrical conductivity, mechanical strength and durability, offer a compelling electrode alternative in the development of next-generation supercapacitors. In this review, we provide insight into the critical role of porosity in enhancing pitch-based carbon fiber performance in supercapacitors, with a focus on the processes and enhancements employed for pore introduction. The background and theoretical underpinnings for the necessity of porosity are briefly introduced, providing a rationale for the optimization of pore distribution. Moreover, the practical outcomes of these treatments are explored in supercapacitor applications, demonstrating the energy storage capabilities of pitch-based activated carbon fibers. In preparing this review, we surveyed the literature and found that pore introduction onto pitch-based carbon fibers is achieved almost solely through activation, which invites future research into alternative techniques. Additionally, it is apparent that future comparisons will benefit from the establishment of a standardized protocol for the reporting of supercapacitor performance.