Three-electron reversible redox for a high-energy fluorophosphate cathode: Na3V2O2(PO4)2F. Issue 27 (18th March 2019)

• Record Type: Journal Article
• Authors: Peng, Manhua; Zhang, Dongtang; Wang, Xiayan; Xia, Dingguo; Sun, Yugang; Guo, Guangsheng
• Is Part Of: Chemical communications. Volume 55:Issue 27(2019)
• Page Start: 3979
• Page End: 3982
• Publication Date: 2019-03-18
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c9cc00504h
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : Na3 V2 O2 (PO4 )2 F crystallising in space group I 4/ mmm shows three-electron reversible redox behavior. Abstract : A three-electron structural reaction for Na3 V2 O2 (PO4 )2 F (Na3 VOPF) in space group I 4/ mmm shows a priori stabilisation in terms of long-life in the voltage range of 2.0–4.5 V, with embedding of more than one sodium ion to generate Na5 VOPF upon discharge to 1.0 V in the first cycle, thereby increasing the specific capacity from ∼170 mA h g −1 . The capacity of the crystals was 180 mA h g −1 after 20 cycles. The results provide a probable route to improve fluorophosphate cathode performance.