Modulating electronic structure via N-doping and built-in electric field in CoO@Co9S8 heterostructure for enabling bidirectional sulfur redox in high-performance LiS batteries - Henan Jia; Wenjun Zhang; Jiayi Luo; Mingwei Liu; Taotao Guo; Fuling Tang; Mao-Cheng Liu; Yaotian Yan; Junlei Qi (Chemical Engineering Journal, 2026)