Preparation and Electrochemical Performance of Na_2-xLi_xFePO₄F/C Composite Cathode Materials with Different Lithium/Sodium Ratios.

ABSTRACT: With their advantages of abundant raw material reserves, safety, and low toxicity and cost, sodium-ion batteries (SIBs) have gained increasing attention in recent years. Thanks to a high theoretical specific capacity (124 mAh g^-1), a high operating voltage (about 3.2 V), and a very stable three-dimensional layered structure, sodium ferric fluorophosphate (Na₂FePO₄F, NFPF) has emerged as a strong candidate to be used as a cathode material for SIBs. However, applications are currently limited due to the low electronic conductivity and slow ion diffusion rate of NFPF, which result in a low actual specific capacity and a high rate performance. In this study, the authors used a high-temperature solid-phase technique to produce Na_2-xLi_xFePO<

SUBMITTER: Wang L 

PROVIDER: S-EPMC10821228 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature