In situ visualization of sodium transport and conversion reactions of FeS                         2                          nanotubes made by morphology engineering

Libing Yao; Weiwei Xia; Hongtao Zhang; Hui Dong; Huolin L. Xin; Peng Gao; Ran Cai; Chongyang Zhu; Yi Wu; Meng Nie; Shuangying Lei; Litao Sun; Feng Xu

doi:10.1016/j.nanoen.2019.03.080

In situ visualization of sodium transport and conversion reactions of FeS ₂ nanotubes made by morphology engineering

Libing Yao, Weiwei Xia, Hongtao Zhang, Hui Dong, Huolin L. Xin^*, Peng Gao, Ran Cai, Chongyang Zhu, Yi Wu, Meng Nie, Shuangying Lei, Litao Sun, Feng Xu

^*Corresponding author for this work

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

51 Citations (Scopus)

Abstract

Iron disulfide (FeS ₂ ), existing in nature as pyrite, holds great promise as a conversion-type anode material for sodium-ion batteries (SIBs), owing to its low cost and high theoretical capacity. However, the large volume expansion and the sluggish electrode reaction kinetics during conversion reactions impede its large-scale practical application in SIBs. Here, we demonstrate the utilization of morphological engineering to achieve poly-crystalline FeS ₂ nanotubes (NTs) consisting of tiny FeS ₂ crystallites. In situ transmission electron microscopy observations reveal that 1D shape can afford straight pathways for Na transport to expedite reaction kinetics, and poly-crystalline structure can buffer large volume expansion and structural strain. Furthermore, high-resolution imaging and electron diffraction were utilized to track phase evolution associated with conversion reactions in real time. We have identified an intercalation-conversion reaction mechanism from the FeS ₂ phase to the Na ₂ S + Fe phases via the intermediate NaFeS ₂ phase upon initial sodiation. Impressively, a reversible and symmetric conversion reaction between NaFeS ₂ phase and Na ₂ S + Fe phases is established during subsequent sodiation−desodiation cycles. Notably, this is the first report of FeS ₂ NTs investigated for secondary battery electrode material. This work not only provides valuable insights into sodium storage mechanism of FeS ₂ material, but also corroborates the pivotal role of morphology engineering in optimizing the microstructure of electrode materials for advanced SIBs.

Original language	English
Pages (from-to)	424-431
Number of pages	8
Journal	Nano Energy
Volume	60
DOIs	https://doi.org/10.1016/j.nanoen.2019.03.080
Publication status	Published - Jun 2019
Externally published	Yes

Keywords

FeS nanotubes
In situ transmission electron microscopy
Ionic transport
Morphology engineering
Sodium-ion battery

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.nanoen.2019.03.080

Cite this

Yao, L., Xia, W., Zhang, H., Dong, H., Xin, H. L., Gao, P., Cai, R., Zhu, C., Wu, Y., Nie, M., Lei, S., Sun, L., & Xu, F. (2019). In situ visualization of sodium transport and conversion reactions of FeS ₂ nanotubes made by morphology engineering Nano Energy, 60, 424-431. https://doi.org/10.1016/j.nanoen.2019.03.080

@article{1a5d7b615bb7469f85a540e5ae608b88,

title = " In situ visualization of sodium transport and conversion reactions of FeS 2 nanotubes made by morphology engineering ",

abstract = " Iron disulfide (FeS 2 ), existing in nature as pyrite, holds great promise as a conversion-type anode material for sodium-ion batteries (SIBs), owing to its low cost and high theoretical capacity. However, the large volume expansion and the sluggish electrode reaction kinetics during conversion reactions impede its large-scale practical application in SIBs. Here, we demonstrate the utilization of morphological engineering to achieve poly-crystalline FeS 2 nanotubes (NTs) consisting of tiny FeS 2 crystallites. In situ transmission electron microscopy observations reveal that 1D shape can afford straight pathways for Na transport to expedite reaction kinetics, and poly-crystalline structure can buffer large volume expansion and structural strain. Furthermore, high-resolution imaging and electron diffraction were utilized to track phase evolution associated with conversion reactions in real time. We have identified an intercalation-conversion reaction mechanism from the FeS 2 phase to the Na 2 S + Fe phases via the intermediate NaFeS 2 phase upon initial sodiation. Impressively, a reversible and symmetric conversion reaction between NaFeS 2 phase and Na 2 S + Fe phases is established during subsequent sodiation−desodiation cycles. Notably, this is the first report of FeS 2 NTs investigated for secondary battery electrode material. This work not only provides valuable insights into sodium storage mechanism of FeS 2 material, but also corroborates the pivotal role of morphology engineering in optimizing the microstructure of electrode materials for advanced SIBs.",

keywords = "FeS nanotubes, In situ transmission electron microscopy, Ionic transport, Morphology engineering, Sodium-ion battery",

author = "Libing Yao and Weiwei Xia and Hongtao Zhang and Hui Dong and Xin, \{Huolin L.\} and Peng Gao and Ran Cai and Chongyang Zhu and Yi Wu and Meng Nie and Shuangying Lei and Litao Sun and Feng Xu",

note = "Publisher Copyright: {\textcopyright} 2019",

year = "2019",

month = jun,

doi = "10.1016/j.nanoen.2019.03.080",

language = "English",

volume = "60",

pages = "424--431",

journal = "Nano Energy",

issn = "2211-2855",

publisher = "Elsevier B.V.",

}

Yao, L, Xia, W, Zhang, H, Dong, H, Xin, HL, Gao, P, Cai, R, Zhu, C, Wu, Y, Nie, M, Lei, S, Sun, L & Xu, F 2019, ' In situ visualization of sodium transport and conversion reactions of FeS ₂ nanotubes made by morphology engineering ', Nano Energy, vol. 60, pp. 424-431. https://doi.org/10.1016/j.nanoen.2019.03.080

In situ visualization of sodium transport and conversion reactions of FeS ₂ nanotubes made by morphology engineering . / Yao, Libing; Xia, Weiwei; Zhang, Hongtao et al.
In: Nano Energy, Vol. 60, 06.2019, p. 424-431.

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

TY - JOUR

T1 - In situ visualization of sodium transport and conversion reactions of FeS 2 nanotubes made by morphology engineering

AU - Yao, Libing

AU - Xia, Weiwei

AU - Zhang, Hongtao

AU - Dong, Hui

AU - Xin, Huolin L.

AU - Gao, Peng

AU - Cai, Ran

AU - Zhu, Chongyang

AU - Wu, Yi

AU - Nie, Meng

AU - Lei, Shuangying

AU - Sun, Litao

AU - Xu, Feng

PY - 2019/6

Y1 - 2019/6

N2 - Iron disulfide (FeS 2 ), existing in nature as pyrite, holds great promise as a conversion-type anode material for sodium-ion batteries (SIBs), owing to its low cost and high theoretical capacity. However, the large volume expansion and the sluggish electrode reaction kinetics during conversion reactions impede its large-scale practical application in SIBs. Here, we demonstrate the utilization of morphological engineering to achieve poly-crystalline FeS 2 nanotubes (NTs) consisting of tiny FeS 2 crystallites. In situ transmission electron microscopy observations reveal that 1D shape can afford straight pathways for Na transport to expedite reaction kinetics, and poly-crystalline structure can buffer large volume expansion and structural strain. Furthermore, high-resolution imaging and electron diffraction were utilized to track phase evolution associated with conversion reactions in real time. We have identified an intercalation-conversion reaction mechanism from the FeS 2 phase to the Na 2 S + Fe phases via the intermediate NaFeS 2 phase upon initial sodiation. Impressively, a reversible and symmetric conversion reaction between NaFeS 2 phase and Na 2 S + Fe phases is established during subsequent sodiation−desodiation cycles. Notably, this is the first report of FeS 2 NTs investigated for secondary battery electrode material. This work not only provides valuable insights into sodium storage mechanism of FeS 2 material, but also corroborates the pivotal role of morphology engineering in optimizing the microstructure of electrode materials for advanced SIBs.

AB - Iron disulfide (FeS 2 ), existing in nature as pyrite, holds great promise as a conversion-type anode material for sodium-ion batteries (SIBs), owing to its low cost and high theoretical capacity. However, the large volume expansion and the sluggish electrode reaction kinetics during conversion reactions impede its large-scale practical application in SIBs. Here, we demonstrate the utilization of morphological engineering to achieve poly-crystalline FeS 2 nanotubes (NTs) consisting of tiny FeS 2 crystallites. In situ transmission electron microscopy observations reveal that 1D shape can afford straight pathways for Na transport to expedite reaction kinetics, and poly-crystalline structure can buffer large volume expansion and structural strain. Furthermore, high-resolution imaging and electron diffraction were utilized to track phase evolution associated with conversion reactions in real time. We have identified an intercalation-conversion reaction mechanism from the FeS 2 phase to the Na 2 S + Fe phases via the intermediate NaFeS 2 phase upon initial sodiation. Impressively, a reversible and symmetric conversion reaction between NaFeS 2 phase and Na 2 S + Fe phases is established during subsequent sodiation−desodiation cycles. Notably, this is the first report of FeS 2 NTs investigated for secondary battery electrode material. This work not only provides valuable insights into sodium storage mechanism of FeS 2 material, but also corroborates the pivotal role of morphology engineering in optimizing the microstructure of electrode materials for advanced SIBs.

KW - FeS nanotubes

KW - In situ transmission electron microscopy

KW - Ionic transport

KW - Morphology engineering

KW - Sodium-ion battery

UR - https://www.scopus.com/pages/publications/85063499151

U2 - 10.1016/j.nanoen.2019.03.080

DO - 10.1016/j.nanoen.2019.03.080

M3 - Article

AN - SCOPUS:85063499151

SN - 2211-2855

VL - 60

SP - 424

EP - 431

JO - Nano Energy

JF - Nano Energy

ER -