Fluorine-induced dual defects in NiP_(2) anode with robust sodium storage performance
作者机构：College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen 518060China College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China Hefei National Laboratory for Physical Sciences at the MicroscaleDepartment of Materials Science and EngineeringCAS Key Laboratory of Materials for Energy ConversionUniversity of Science and Technology of ChinaHefei 230026China
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2022年第15卷第3期
页 面：2147-2156页
核心收录：
基 金：the National Natural Science Foundation of China(Nos.22005201 and 22005292) the Natural Science Foundation of Guangdong(No.2020A1515010840) Shenzhen Government’s Plan of Science and Technology(Nos.JCYJ20200109105803806 and RCYX20200714114535052)
主 题：NiP_(2) electronic structure modulation F doping P vacancies dual defects sodium-ion batteries
摘 要：Metal phosphides have shown great application potential as anode for sodium-ion batteries(NIBs)owing to high theoretical capacity,suitable operation voltage and abundant ***,the application of NiP_(2) anode is severely impeded by low practical capacity and fast capacity decay due to the huge volume variation and low reactivity of internal phosphorus(P)component towards Na^(+).Herein,electronic structure modulation of NiP_(2) via heteroatoms doping and introducing vacancies defects to enhance Na+adsorption sites and diffusion kinetics is successfully *** as-synthesized three-dimensional(3D)bicontinuous carbon matrix decorated with well-dispersed fluorine(F)-doped NiP_(2) nanoparticles(F-NiP_(2)@carbon nanosheets)delivers a high reversible capacity(585 mAh·g^(−1) at 0.1 A·g^(−1))and excellent long cycling stability(244 mAh·g^(−1) over 1,000 cycles at 2 A·g^(−1))when tested as anode in *** functional theory(DFT)calculations reveal that F doping in NiP_(2) induces the formation of P vacancies with increased Na+adsorption energy and accelerates the alloying of internal P *** F-NiP_(2)@carbon nanosheets//Na_(3)V_(2)(PO_(4))_(3) full cell is evaluated showing stable long cycling *** heteroatoms doping-induced dual defects strategy opens up a new way of metal phosphides for sodium storage.
维普期刊数据库