Double-shelled Co3O4/C nanocages enabling polysulfides adsorption for high-performance lithium-sulfur batteries

Lei Zhou, Hao Li, Xiaochao Wu, Yue Zhang, Dmitri L. Danilov, Rüdiger A. Eichel, Peter H.L. Notten (Corresponding author)

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Rechargeable lithium-sulfur (Li-S) batteries, which originate from the merits of extraordinary theoretical specific energy density, abundant resources, and eco-friendly character, have received ever-growing attention. However, their practical applications are seriously hampered because of the poor conductive property of the sulfur and the discharging products, severe dissolution and migration of lithium polysulfide intermediates, and huge volumetric variation of sulfur particles upon cycling. Here, double-shelled Co3O4 and carbon (Co3O4/C) hollow nanocages as sulfur host materials are reported. The double-shelled structures can significantly boost the adsorption of soluble polysulfides and the electrical conductivity of sulfur cathodes. Consequently, the prepared S@Co3O4/C cathodes achieve considerable capacity enhancement and excellent rate capability, combining the durable cycling life at 1 C for 500 cycles, in which the overall capacity fading remains as low as 0.083% per cycle. Upper-plateau (QH) and lower-plateau (QL) capacities, static adsorption of polysulfides, and X-ray photoelectron spectroscopy (XPS) analyses unveil the underlying nature of the chemical interactions between polysulfide species and the sulfur host. The present results will favor the design and screening of prospective host materials to boost future Li-S batteries.

Originele taal-2Engels
Pagina's (van-tot)8153-8162
Aantal pagina's10
TijdschriftACS Applied Energy Materials
Volume2
Nummer van het tijdschrift11
DOI's
StatusGepubliceerd - 25 nov 2019

Vingerafdruk

Polysulfides
Sulfur
Carbon
Adsorption
Cathodes
Lithium
Screening
Dissolution
X ray photoelectron spectroscopy
Lithium sulfur batteries
polysulfide

Citeer dit

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title = "Double-shelled Co3O4/C nanocages enabling polysulfides adsorption for high-performance lithium-sulfur batteries",
abstract = "Rechargeable lithium-sulfur (Li-S) batteries, which originate from the merits of extraordinary theoretical specific energy density, abundant resources, and eco-friendly character, have received ever-growing attention. However, their practical applications are seriously hampered because of the poor conductive property of the sulfur and the discharging products, severe dissolution and migration of lithium polysulfide intermediates, and huge volumetric variation of sulfur particles upon cycling. Here, double-shelled Co3O4 and carbon (Co3O4/C) hollow nanocages as sulfur host materials are reported. The double-shelled structures can significantly boost the adsorption of soluble polysulfides and the electrical conductivity of sulfur cathodes. Consequently, the prepared S@Co3O4/C cathodes achieve considerable capacity enhancement and excellent rate capability, combining the durable cycling life at 1 C for 500 cycles, in which the overall capacity fading remains as low as 0.083{\%} per cycle. Upper-plateau (QH) and lower-plateau (QL) capacities, static adsorption of polysulfides, and X-ray photoelectron spectroscopy (XPS) analyses unveil the underlying nature of the chemical interactions between polysulfide species and the sulfur host. The present results will favor the design and screening of prospective host materials to boost future Li-S batteries.",
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Double-shelled Co3O4/C nanocages enabling polysulfides adsorption for high-performance lithium-sulfur batteries. / Zhou, Lei; Li, Hao; Wu, Xiaochao; Zhang, Yue; Danilov, Dmitri L.; Eichel, Rüdiger A.; Notten, Peter H.L. (Corresponding author).

In: ACS Applied Energy Materials, Vol. 2, Nr. 11, 25.11.2019, blz. 8153-8162.

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

TY - JOUR

T1 - Double-shelled Co3O4/C nanocages enabling polysulfides adsorption for high-performance lithium-sulfur batteries

AU - Zhou, Lei

AU - Li, Hao

AU - Wu, Xiaochao

AU - Zhang, Yue

AU - Danilov, Dmitri L.

AU - Eichel, Rüdiger A.

AU - Notten, Peter H.L.

PY - 2019/11/25

Y1 - 2019/11/25

N2 - Rechargeable lithium-sulfur (Li-S) batteries, which originate from the merits of extraordinary theoretical specific energy density, abundant resources, and eco-friendly character, have received ever-growing attention. However, their practical applications are seriously hampered because of the poor conductive property of the sulfur and the discharging products, severe dissolution and migration of lithium polysulfide intermediates, and huge volumetric variation of sulfur particles upon cycling. Here, double-shelled Co3O4 and carbon (Co3O4/C) hollow nanocages as sulfur host materials are reported. The double-shelled structures can significantly boost the adsorption of soluble polysulfides and the electrical conductivity of sulfur cathodes. Consequently, the prepared S@Co3O4/C cathodes achieve considerable capacity enhancement and excellent rate capability, combining the durable cycling life at 1 C for 500 cycles, in which the overall capacity fading remains as low as 0.083% per cycle. Upper-plateau (QH) and lower-plateau (QL) capacities, static adsorption of polysulfides, and X-ray photoelectron spectroscopy (XPS) analyses unveil the underlying nature of the chemical interactions between polysulfide species and the sulfur host. The present results will favor the design and screening of prospective host materials to boost future Li-S batteries.

AB - Rechargeable lithium-sulfur (Li-S) batteries, which originate from the merits of extraordinary theoretical specific energy density, abundant resources, and eco-friendly character, have received ever-growing attention. However, their practical applications are seriously hampered because of the poor conductive property of the sulfur and the discharging products, severe dissolution and migration of lithium polysulfide intermediates, and huge volumetric variation of sulfur particles upon cycling. Here, double-shelled Co3O4 and carbon (Co3O4/C) hollow nanocages as sulfur host materials are reported. The double-shelled structures can significantly boost the adsorption of soluble polysulfides and the electrical conductivity of sulfur cathodes. Consequently, the prepared S@Co3O4/C cathodes achieve considerable capacity enhancement and excellent rate capability, combining the durable cycling life at 1 C for 500 cycles, in which the overall capacity fading remains as low as 0.083% per cycle. Upper-plateau (QH) and lower-plateau (QL) capacities, static adsorption of polysulfides, and X-ray photoelectron spectroscopy (XPS) analyses unveil the underlying nature of the chemical interactions between polysulfide species and the sulfur host. The present results will favor the design and screening of prospective host materials to boost future Li-S batteries.

KW - chemical adsorption

KW - double-shelled structure

KW - lithium-sulfur batteries

KW - metal oxides

KW - polysulfides

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