Reversible High-Voltage N-Redox Chemistry in Metal–Organic Frameworks for High-Rate Anion-Intercalation Batteries

• DOI: 10.1021/acsaem.8b01428
• Publication Date: 2018-11-29T20:11:45Z
• Authors: Xiaobing Lou; Fushan Geng; Bei Hu; Chao Li; Ming Shen; Bingwen Hu
• Keywords: 01 natural sciences; 0104 chemical sciences

Because of the capacity limitation in traditional transition-metal oxide cathodes, design novel cathodes is vital for performance enhancement lithium-ion batteries. In this work, we propose a new anion-intercalation strategy metal–organic frameworks that can be used as high-voltage A pcu-topology [Zn4O2(DAnT)3(DMF)4]·(DMF)6 MOF synthesized with enriched nitrogen active sites and porous cage structure. When applied cathode LiPF6 based electrolyte, reaches theoretical ∼60 mAh g–1 at current density 100 mA within high working voltage 2.5–4.0 V versus Li/Li+. Even 1000 (∼16C), half still obtained. The reversible conversion N/N+ adsorption/desorption PF6– were also examined by series ex situ characterizations including XPS, XRD, FTIR, which clearly validates our permits good electrochemical relatively potential.