From Na2FePO4F/CNT to NaKFePO4F/CNT as advanced cathode material for K-ion batteries

被引：3

作者：

Bodart, Jerome ^{[1
]}

Eshraghi, Nicolas ^{[1
,2
]}

Sougrati, Moulay Tahar ^{[3
,4
]}

Boschini, Frederic ^{[1
]}

Lippens, Pierre-Emmanuel ^{[3
,4
]}

Vertruyen, Benedicte ^{[1
]}

Mahmoud, Abdelfattah ^{[1
]}

机构：

[1] Univ Liege, Dept Chem, CESAM Res Unit, GREENMAT, B-4000 Liege, Belgium

[2] AIT Austrian Inst Technol GmbH, Ctr Low Emiss Transport, Battery Technol, Giefinggasse 2, A-1210 Vienna, Austria

[3] UM, Inst Charles Gerhardt Montpellier, CNRS, UMR 5253,ENSCM, 1919 route Mende, F-34293 Montpellier 5, France

[4] CNRS, RS2E, Amiens, France

来源：

JOURNAL OF POWER SOURCES | 2023年 / 555卷

关键词：

Phosphate -based cathode; Spray; -drying; K -ion batteries; Na-ion batteries; CARBON-COATED NA2FEPO4F; ELECTROCHEMICAL PERFORMANCE; ELECTRODE PERFORMANCE; SODIUM; NANOTUBES; COMPOSITE; PHOSPHATE; SPHERES;

D O I：

10.1016/j.jpowsour.2022.232410

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The Na2FePO4F/CNT composite investigated in this work was prepared by an optimized and easily scalable spray-drying process, resulting in an excellent initial discharge specific capacity of 123 mAh/g at C/15 when cycled against sodium. This NFPF/CNT composite was able to intercalate potassium ions reversibly with a promising specific capacity of 80 mAh/g after optimization of the electrolyte composition. Electrochemical desodiation was the key factor to reach outstanding performance as a cathode material in K-ion batteries, with the NaKFePO4F/CNT composite leading to a stable capacity of 114 mAh/g at C/15 rate (99% of the theoretical capacity), one of the highest capacity values reported for K-ion technology.

引用

页数：9

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