A Four‐Electron Sulfur Electrode Hosting a Cu2+/Cu+ Redox Charge Carrier. - Wu, Xianyong; Markir, Aaron; Ma, Lu; Xu, Yunkai; Jiang, Heng; Leonard, Daniel P.; Shin, Woochul; Wu, Tianpin; Lu, Jun; Ji, Xiulei (Angewandte Chemie International Edition, 2019)