Curved graphitic nanosheets with single-atom Zn − N4 defects within closed-pores assisting sodium ion nucleation for high-efficiency sodium storage - Shuocong Duan; Dandan Wang; Chi Chen; Tong Xiao; Run Ren; Linan Wang; Wenjie Zhang; Yunfeng Chao; Jianhua Zhu; Xinwei Cui (Chemical Engineering Journal, 2026)