Dual-Defect Engineering Strategy Enables High-Durability Rechargeable Magnesium-Metal Batteries

• DOI: 10.1007/s40820-024-01410-8
• Publication Date: 2024-04-29T16:02:17Z
• Authors: Fuyu Chen; Bai-Qing Zhao; Kaifeng Huang; Xiu-Fen Ma; Hong-Yi Li; Xie Zhang; Jiang Diao; Jili Yue; Guangsheng Huang; Jingfeng Wang; Fusheng Pan
• Keywords: Technology; Vanadium-based cathode; T; Rechargeable magnesium-metal batteries; Lamellar structure; High durability; Dual-defect engineering; 01 natural sciences; Article; 0104 chemical sciences

Abstract Rechargeable magnesium-metal batteries (RMMBs) are promising next-generation secondary batteries; however, their development is inhibited by the low capacity and short cycle lifespan of cathodes. Although various strategies have been devised to enhance Mg 2+ migration kinetics structural stability cathodes, they fail improve electronic conductivity, rendering cathodes incompatible with anodes. Herein, we propose a dual-defect engineering strategy, namely, incorporation pre-intercalation defect (P-Mg d ) oxygen (O ), simultaneously kinetics, stability, conductivity RMMBs. Using lamellar V 2 O 5 ·nH as demo cathode material, prepare comprising 0.07 ·1.4H nanobelts composited reduced graphene oxide (MVOH/rGO) P-Mg . The enlarges interlayer spacing, accelerates prevents collapse, while stabilizes structure increases conductivity. Consequently, MVOH/rGO exhibits high 197 mAh g −1 , developed foil//MVOH/rGO full cell demonstrates an incredible 850 cycles at 0.1 A capable powering light-emitting diode. proposed strategy provides new insights into developing high-durability, high-capacity advancing practical application RMMBs, other batteries.