Details der Publikation - Effects of physical properties of N-doped carbon on carbon/N-doped carbon/sulfur composite cathodes

Effects of physical properties of N-doped carbon on carbon/N-doped carbon/sulfur composite cathodes

Abstract Non-polar porous carbon/doped polar carbon composite hosts have been proved effective for sulfur in lithium–sulfur (Li–S) battery. Pores in carbon can adsorb sulfur and $ Li_{2} $S, and nitrogen–doped surface shows a stronger affinity for polysulfides through additional chemisorptions. However, how the physical properties of doped carbon, e.g., surface area and porosity, affect the performance of the non-polar carbon/doped polar carbon composite hosts is unknown. Herein, we reported the cotton-derived carbon/porous 1-ethyl-3-methylimidazolium dicyanamide (Emim-dca) derived N-doped carbon, named C/PNC, and the cotton-derived carbon/imporous Emim-dca derived N-doped carbon, named C/NC. The surface area and porosity of the doped polar carbon in C/PNC and C/NC are controlled. The higher surface area of N-doped carbon makes more surface of cotton-derived carbon coated and more sulfur located on the surface of composite hosts. The micro-mesopores in the N-doped carbon can restrain sulfur but shows slow reactive kinetics at a higher current rate. The C/PNC cathode showed a higher discharge capacity of 1100 mAh $ g^{−1} $ than that of 1027 mAh $ g^{−1} $ for the C/NC cathode at 0.1 C and a lower capacity of 208.1 mAh $ g^{−1} $ than that of 349.2 mAh $ g^{−1} $ for C/NC cathode at 2 C..

Medienart:	E-Artikel

Erscheinungsjahr:	2021
Erschienen:	2021

Enthalten in:	Zur Gesamtaufnahme - volume:27
Enthalten in:	Ionics - 27(2021), 8 vom: 26. Mai, Seite 3271-3279

Sprache:	Englisch

Beteiligte Personen:	Cheng, Juanjuan [VerfasserIn] Wang, Zhijin [VerfasserIn] Song, Hongjia [VerfasserIn] Zhong, Xiangli [VerfasserIn] Wang, Jinbin [VerfasserIn]

Links:	Volltext [lizenzpflichtig]

BKL:	33.30$jAtomphysik$jMolekülphysik 35.10$jPhysikalische Chemie: Allgemeines
Themen:	Carbon cathode Lithium–sulfur battery N-doped carbon Non-polar/polar composite host

Anmerkungen:	© The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2021

doi:	10.1007/s11581-021-04097-8

funding:
Förderinstitution / Projekttitel:

PPN (Katalog-ID):	OLC2126762181

Internformat


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520			\|a Abstract Non-polar porous carbon/doped polar carbon composite hosts have been proved effective for sulfur in lithium–sulfur (Li–S) battery. Pores in carbon can adsorb sulfur and $ Li_{2} $S, and nitrogen–doped surface shows a stronger affinity for polysulfides through additional chemisorptions. However, how the physical properties of doped carbon, e.g., surface area and porosity, affect the performance of the non-polar carbon/doped polar carbon composite hosts is unknown. Herein, we reported the cotton-derived carbon/porous 1-ethyl-3-methylimidazolium dicyanamide (Emim-dca) derived N-doped carbon, named C/PNC, and the cotton-derived carbon/imporous Emim-dca derived N-doped carbon, named C/NC. The surface area and porosity of the doped polar carbon in C/PNC and C/NC are controlled. The higher surface area of N-doped carbon makes more surface of cotton-derived carbon coated and more sulfur located on the surface of composite hosts. The micro-mesopores in the N-doped carbon can restrain sulfur but shows slow reactive kinetics at a higher current rate. The C/PNC cathode showed a higher discharge capacity of 1100 mAh $ g^{−1} $ than that of 1027 mAh $ g^{−1} $ for the C/NC cathode at 0.1 C and a lower capacity of 208.1 mAh $ g^{−1} $ than that of 349.2 mAh $ g^{−1} $ for C/NC cathode at 2 C.
650		4	\|a Lithium–sulfur battery
650		4	\|a Carbon cathode
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650		4	\|a Non-polar/polar composite host
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Effects of physical properties of N-doped carbon on carbon/N-doped carbon/sulfur composite cathodes

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