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Highly Electrochemically-Reversible Mesoporous Na2FePO4F/C as Cathode Material for High-Performance Sodium-Ion Batteries

Journal Article


Abstract


  • As promising cathode materials, iron-based phosphate compounds have attracted wide attention for sodium-ion batteries due to their low cost and safety. Among them, sodium iron fluorophosphate (Na2FePO4F) is widely noted due to its layered structure and high operating voltage compared with NaFePO4. Here, a mesoporous Na2FePO4F@C (M-NFPF@C) composite derived from mesoporous FePO4 is synthesized through a facile ball-milling combined calcination method. Benefiting from the mesoporous structure and highly conductive carbon, the M-NFPF@C material exhibits a high reversible capacity of 114 mAh gāˆ’1 at 0.1 C, excellent rate capability (42 mAh gāˆ’1 at 10 C), and good cycling performance (55% retention after 600 cycles at 5 C). The high plateau capacity obtained (>90% of total capacity) not only shows high electrochemical reversibility of the as-prepared M-NFPF@C but also provides high energy density, which mainly originates from its mesoporous structure derived from the mesoporous FePO4 precursor. The M-NFPF@C serves as a promising cathode material with high performance and low cost for sodium-ion batteries.

Publication Date


  • 2019

Published In


Citation


  • Zhang, J., Zhou, X., Wang, Y., Qian, J., Zhong, F., Feng, X., . . . Cao, Y. (2019). Highly Electrochemically-Reversible Mesoporous Na2FePO4F/C as Cathode Material for High-Performance Sodium-Ion Batteries. Small, 15(46). doi:10.1002/smll.201903723

Scopus Eid


  • 2-s2.0-85073991176

Web Of Science Accession Number


Volume


  • 15

Issue


  • 46

Abstract


  • As promising cathode materials, iron-based phosphate compounds have attracted wide attention for sodium-ion batteries due to their low cost and safety. Among them, sodium iron fluorophosphate (Na2FePO4F) is widely noted due to its layered structure and high operating voltage compared with NaFePO4. Here, a mesoporous Na2FePO4F@C (M-NFPF@C) composite derived from mesoporous FePO4 is synthesized through a facile ball-milling combined calcination method. Benefiting from the mesoporous structure and highly conductive carbon, the M-NFPF@C material exhibits a high reversible capacity of 114 mAh gāˆ’1 at 0.1 C, excellent rate capability (42 mAh gāˆ’1 at 10 C), and good cycling performance (55% retention after 600 cycles at 5 C). The high plateau capacity obtained (>90% of total capacity) not only shows high electrochemical reversibility of the as-prepared M-NFPF@C but also provides high energy density, which mainly originates from its mesoporous structure derived from the mesoporous FePO4 precursor. The M-NFPF@C serves as a promising cathode material with high performance and low cost for sodium-ion batteries.

Publication Date


  • 2019

Published In


Citation


  • Zhang, J., Zhou, X., Wang, Y., Qian, J., Zhong, F., Feng, X., . . . Cao, Y. (2019). Highly Electrochemically-Reversible Mesoporous Na2FePO4F/C as Cathode Material for High-Performance Sodium-Ion Batteries. Small, 15(46). doi:10.1002/smll.201903723

Scopus Eid


  • 2-s2.0-85073991176

Web Of Science Accession Number


Volume


  • 15

Issue


  • 46