Nanoarchitectonics of hierarchical porous biochars from heavy bio-oil by coupling calcium salts assisted template carbonization and K2CO3 activation for high-performance supercapacitors - Haonan Zhu; Yansheng Wu; Haoran Chen; Hong Zhang; Xin Guo; Xun Hu; Shu Zhang; Wenran Gao (Biomass and Bioenergy, 2024)