# Retraction: Superior electrochemical performances of highly porous bismuth oxyhalide/lemon peel derived activated carbon electrode materials for solid state asymmetric and symmetric supercapattery devices

## TL;DR

This retraction notice announces the withdrawal of a paper about using bismuth oxyhalide and lemon peel-derived carbon in supercapattery devices.

## Contribution

The paper is being retracted, indicating the findings or claims presented are no longer considered valid.

## Key findings

- The paper's claims about electrochemical performance are being retracted.
- The use of lemon peel-derived activated carbon in the study is no longer supported.

## Abstract

Retraction of ‘Superior electrochemical performances of highly porous bismuth oxyhalide/lemon peel derived activated carbon electrode materials for solid state asymmetric and symmetric supercapattery devices’ by Junaid Khan et al., RSC Adv., 2025, 15, 49565–49583, https://doi.org/10.1039/D5RA07844J.