Electric field-assisted positively charged nanofiltration membranes for efficient Mg2+/Li+ separation - Chun-Xu Zhang; Yan-Yan Chen; Ren-Jie Fan; Yu-Xuan Sun; Xiaohu Wang; Fujun Xiong; Yong Wang; Mei-Ling Liu; Shi-Peng Sun; Weihong Xing (Desalination, 2026)