Ultrahigh rate binder-free Na3V2(PO4)3/carbon cathode for sodium-ion battery

Le Yang; Wei Wang; Mingxiang Hu; Jiaojing Shao; Ruitao Lv

doi:10.1016/j.jechem.2017.08.021

Ultrahigh rate binder-free Na₃V₂(PO₄)₃/carbon cathode for sodium-ion battery

Le Yang, Wei Wang, Mingxiang Hu, Jiaojing Shao^*, Ruitao Lv

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

39 Citations (Scopus)

Abstract

Sodium ion batteries (SIBs) are very promising for large-scale energy storage in virtue of its high energy density, abundant sodium resources and low environmental impact, etc. However, it is still a big challenge to develop high-performance and durable cathode materials for SIBs. Among different candidate materials, Na₃V₂(PO₄)₃ has attracted great attentions due to its high theoretical capacity (117 mAh/g), stable framework structure and excellent ionic conductivity. However, Na₃V₂(PO₄)₃ delivers inferior rate capability and cycling stability due to its poor electronic conductivity. In this work, free-standing Na₃V₂(PO₄)₃/carbon nanofiber membranes are synthesized by an electrospinning-sintering route. The sample could deliver excellent cycling capability with specific capacity of 112 mAh/g at 1 C after 250 cycles and ultrahigh rate capability with 76.9 mAh/g even at 100 C, which is superior to many state-of-the-art SIB cathode materials. This can be attributed to the hierarchically distributed Na₃V₂(PO₄)₃ crystals in carbon nanofiber network, which possesses outstanding electronic/ionic conductivity and thus leads to an ultrahigh rate capability.

Original language	English
Pages (from-to)	1439-1445
Number of pages	7
Journal	Journal of Energy Chemistry
Volume	27
Issue number	5
DOIs	https://doi.org/10.1016/j.jechem.2017.08.021
Publication status	Published - Sept 2018
Externally published	Yes

Keywords

Carbon nanofiber
Electrospinning
Free-standing cathode
NaV(PO)
Sodium-ion battery

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10.1016/j.jechem.2017.08.021

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title = "Ultrahigh rate binder-free Na3V2(PO4)3/carbon cathode for sodium-ion battery",

abstract = "Sodium ion batteries (SIBs) are very promising for large-scale energy storage in virtue of its high energy density, abundant sodium resources and low environmental impact, etc. However, it is still a big challenge to develop high-performance and durable cathode materials for SIBs. Among different candidate materials, Na3V2(PO4)3 has attracted great attentions due to its high theoretical capacity (117 mAh/g), stable framework structure and excellent ionic conductivity. However, Na3V2(PO4)3 delivers inferior rate capability and cycling stability due to its poor electronic conductivity. In this work, free-standing Na3V2(PO4)3/carbon nanofiber membranes are synthesized by an electrospinning-sintering route. The sample could deliver excellent cycling capability with specific capacity of 112 mAh/g at 1 C after 250 cycles and ultrahigh rate capability with 76.9 mAh/g even at 100 C, which is superior to many state-of-the-art SIB cathode materials. This can be attributed to the hierarchically distributed Na3V2(PO4)3 crystals in carbon nanofiber network, which possesses outstanding electronic/ionic conductivity and thus leads to an ultrahigh rate capability.",

keywords = "Carbon nanofiber, Electrospinning, Free-standing cathode, NaV(PO), Sodium-ion battery",

author = "Le Yang and Wei Wang and Mingxiang Hu and Jiaojing Shao and Ruitao Lv",

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year = "2018",

month = sep,

doi = "10.1016/j.jechem.2017.08.021",

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T1 - Ultrahigh rate binder-free Na3V2(PO4)3/carbon cathode for sodium-ion battery

AU - Yang, Le

AU - Wang, Wei

AU - Hu, Mingxiang

AU - Shao, Jiaojing

AU - Lv, Ruitao

PY - 2018/9

Y1 - 2018/9

N2 - Sodium ion batteries (SIBs) are very promising for large-scale energy storage in virtue of its high energy density, abundant sodium resources and low environmental impact, etc. However, it is still a big challenge to develop high-performance and durable cathode materials for SIBs. Among different candidate materials, Na3V2(PO4)3 has attracted great attentions due to its high theoretical capacity (117 mAh/g), stable framework structure and excellent ionic conductivity. However, Na3V2(PO4)3 delivers inferior rate capability and cycling stability due to its poor electronic conductivity. In this work, free-standing Na3V2(PO4)3/carbon nanofiber membranes are synthesized by an electrospinning-sintering route. The sample could deliver excellent cycling capability with specific capacity of 112 mAh/g at 1 C after 250 cycles and ultrahigh rate capability with 76.9 mAh/g even at 100 C, which is superior to many state-of-the-art SIB cathode materials. This can be attributed to the hierarchically distributed Na3V2(PO4)3 crystals in carbon nanofiber network, which possesses outstanding electronic/ionic conductivity and thus leads to an ultrahigh rate capability.

AB - Sodium ion batteries (SIBs) are very promising for large-scale energy storage in virtue of its high energy density, abundant sodium resources and low environmental impact, etc. However, it is still a big challenge to develop high-performance and durable cathode materials for SIBs. Among different candidate materials, Na3V2(PO4)3 has attracted great attentions due to its high theoretical capacity (117 mAh/g), stable framework structure and excellent ionic conductivity. However, Na3V2(PO4)3 delivers inferior rate capability and cycling stability due to its poor electronic conductivity. In this work, free-standing Na3V2(PO4)3/carbon nanofiber membranes are synthesized by an electrospinning-sintering route. The sample could deliver excellent cycling capability with specific capacity of 112 mAh/g at 1 C after 250 cycles and ultrahigh rate capability with 76.9 mAh/g even at 100 C, which is superior to many state-of-the-art SIB cathode materials. This can be attributed to the hierarchically distributed Na3V2(PO4)3 crystals in carbon nanofiber network, which possesses outstanding electronic/ionic conductivity and thus leads to an ultrahigh rate capability.

KW - Carbon nanofiber

KW - Electrospinning

KW - Free-standing cathode

KW - NaV(PO)

KW - Sodium-ion battery

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Ultrahigh rate binder-free Na₃V₂(PO₄)₃/carbon cathode for sodium-ion battery

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