Advancing Supercapacitors with Coconut Rachis Activated Carbon: A Sustainable Electrode MaterialDevu Bindhu, Chandrasekharan Omanaamma Sreekala, Izan Izwan Misnon and Rajan JoseE3S Web Conf., 621 (2025) 03020DOI: https://doi.org/10.1051/e3sconf/202562103020