Nanoarchitectonics with synergistic optimization among various structural types in walnut green peel derived carbon materials for high-performance symmetric supercapacitors - Xiaoxue Liu; Hao Wu; Jun Zhang; Jinfeng Zheng; Duoliang Shan; Xiaoyang Cheng; Lingyan Li; Yilei Jing (Biomass and Bioenergy, 2026)