First Author:Haipeng Wang

Correspondence Author:Gang Zhang, Hong-bin Sun

Co author:Li, Hong

Journal:Solid State Ionics

Volume:386

Impact Factor:3.0

DOI number:10.1016/j.ssi.2022.116056

Affiliation of Author(s):Department of Chemistry, Northeastern University

Teaching and Research Group:物理化学

Place of Publication:NETHERLANDS

Abstract:LiFePO4 is the widely accepted high-performance cathode material for lithium-ion batteries with good economy and safety. Carbon encapsulation is the ordinary way to overcome its weakness of poor conductivity. In this work, nitrogen-doped carbon coating was created by growing FeNi-ZIF-8 on the lithium iron phosphate surface and then calcining at high temperature. This network structure of nitrogen-doped carbon surrounding the lithium iron phosphate is rich in both sp2-C and defectives, which promote the ions and electron conductivity throughout nanoparticles to enhance the rate performance and cycling stability of the lithium iron phosphate cathode. The results show that the synthesized LFP@NC(FeNi) composites provide a capacity of 166.6 mAh g 1 at 0.1C and 72.9 mAh g 1 at 10C, respectively. The capacity retention rate of 500 cycles at 5C is about 94.2%. The high-rate performance and cycle stability fulfill the requirements of rechargeable lithium batteries.

Key Words:LFP, (Fe Ni) doped ZIF-8, MOFs derived nitrogen-doped carbon,sp2-C rich and defective carbon coating,High-rate-performance cathode,lithium storage

Document Code:WOS:000901030400004

Discipline:Natural Science

First-Level Discipline:Chemistry

Page Number:116056

ISSN No.:0167-2738

Translation or Not:no