Physical and Electrochemical Characterization of Palm Kernel Shell Biochar (PKSB) as SupercapacitorWan Azlina Wan Ab Karim Ghani, Praveen Shawn Fernandez, Mohamad Qayyum Halele, Shafreeza Sobri and Jasronita JasniMATEC Web of Conferences, 62 (2016) 04003DOI: https://doi.org/10.1051/matecconf/20166204003