Rational synthesis of marcacite FeS2 hollow microspheres for high-rate and long-life sodium ion battery anode

Wu, Xiang; Zhao, Hanqing; Xu, Junmin; Wang, Ye; Dai, Shuge; Xu, Tingting; Liu, Shengman; Zhang, Sen; Wang, Xinchang; Li, Xinjian

doi:10.1016/j.jallcom.2020.154173

Cited by 43 publications

(17 citation statements)

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“…There has been various attempts to obtain phase-pure marcasite nanoparticles for battery electrode applications. [14][15][16][17] Nevertheless, these reports are not sufficient in order to understand the FeS 2 phase formation. The formation of marcasite occurs under laboratory conditions, as well as in nature, alongside the pyrite formation.…”

Section: Introductionmentioning

confidence: 99%

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Synthetic control over polymorph formation in the d-band semiconductor system FeS₂

Lefèvre

et al. 2021

Chem. Sci.

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Section: Introductionmentioning

confidence: 99%

“…Various efforts have been made for the hydrothermal synthesis of marcasite and pyrite in the past, most commonly resulting in nano-particles. 12,[14][15][16][17] Henceforth, some of the most fundamental properties of marcasite have never been measured on laboratory prepared high purity single crystal samples.…”

Section: Introductionmentioning

confidence: 99%

Synthetic control over polymorph formation in the d-band semiconductor system FeS₂

Lefèvre

et al. 2021

Chem. Sci.

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“…This mineral is anisotropic 9,10 and decomposes more easily than pyrite by surface attack 11 . Some potential applications have been proposed for lithium and sodium batteries 12,13 .…”

Section: Introductionmentioning

confidence: 99%

Surfaces, Interfaces and Crystal Growth of Marcasite FeS2

Arrouvel

2021

Mat. Res.

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Marcasite mineral is a metastable iron sulphide, α-FeS 2 , less known and less abundant than pyrite β-FeS 2. Their chemical compositions are similar, formed by S 2 2dimers and Fe 2+ species, but the marcasite crystal structure is orthorhombic while pyrite is cubic. The thermodynamic stability of a range of selected surfaces and their kinetic growth are analysed with molecular mechanics simulations implemented in METADISE code. The most stable surface of marcasite corresponds to the (101) surface having the lowest surface energy (marcasite 101 γ = 1.06 Jm-2) and the most favoured kinetic growth rate is expected for the [010] direction (the attachment energy of (010) surface is 0.20 |eV|/at). Mirror twinning is another characteristic of the mineral contributing to a distinctive crystal growth forming different shapes such as striated needles or pseudo-pentagonal flowers. Similarities, differences and overgrowth between the two dimorphs are highlighted.

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“…Various efforts have been made for the hydrothermal synthesis of marcasite and pyrite in the past, most commonly resulting in nano-particles. 12,[14][15][16][17] . Henceforth, some of the most fundamental properties of marcasite have never been measured on laboratory prepared high purity single crystal samples.…”

Section: Introductionmentioning

confidence: 99%

Synthetic control over polymorph formation in the d-band semiconductor system FeS$_2$

Ma,

Lefèvre,

et al. 2021

Preprint

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Pyrite, also known as fool's gold is the thermodynamic stable polymorph of FeS 2 . It is widely considered as a promising d-band semiconductor for various applications due to its intriguing physical properties. Marcasite is the other naturally occurring polymorph of FeS 2 . Measurements on natural crystals have shown that it has similarly promising electronic, mechanical, and optical properties as pyrite. However, it has been only scarcely investigated so far, because the laboratory-based synthesis of phase-pure samples or high quality marcasite single crystal has been a challenge until now. Here, we report the targeted phase formation via hydrothermal synthesis of marcasite and pyrite. The formation condition and phase purity of the FeS 2 polymorphs are systematically studied in the form of a comprehensive synthesis map. We, furthermore, report on a detailed analysis of marcasite single crystal growth by a space-separated hydrothermal synthesis. We observe that single phase product of marcasite forms only on the surface under the invovlement of H 2 S and sulphur vapor. The availability of high-quality crystals of marcasite allows us to measure the fundamental physical properties, including an allowed direct optical bandgap of 0.76 eV, temperature independent diamagnetism, an electronic transport gap of 0.11 eV, and a room-temperature carrier concentration of 4.14 × 10 18 cm −3 . X-ray absorption/emission spectroscopy are employed to measure the band gap of the two FeS 2 phases. We find marcasite has a band gap of 0.73 eV, while pyrite has a band gap of 0.87 eV. Our results indicate that marcasite -that is now synthetically available in a straightforward fashion -is as equally promising as pyrite as candidate for various semiconductor applications based on earth abundant elements.

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Rational synthesis of marcacite FeS2 hollow microspheres for high-rate and long-life sodium ion battery anode

Cited by 43 publications

References 43 publications

Synthetic control over polymorph formation in the d-band semiconductor system FeS₂

Synthetic control over polymorph formation in the d-band semiconductor system FeS₂

Surfaces, Interfaces and Crystal Growth of Marcasite FeS2

Synthetic control over polymorph formation in the d-band semiconductor system FeS$_2$

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Rational synthesis of marcacite FeS2 hollow microspheres for high-rate and long-life sodium ion battery anode

Cited by 43 publications

References 43 publications

Synthetic control over polymorph formation in the d-band semiconductor system FeS2

Synthetic control over polymorph formation in the d-band semiconductor system FeS2

Surfaces, Interfaces and Crystal Growth of Marcasite FeS2

Synthetic control over polymorph formation in the d-band semiconductor system FeS$_2$

Contact Info

Product

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Synthetic control over polymorph formation in the d-band semiconductor system FeS₂

Synthetic control over polymorph formation in the d-band semiconductor system FeS₂