Synthesis of nitrogen-doped oxygen-deficient TiO2-x/reduced graphene oxide/sulfur microspheres via spray drying process for lithium-sulfur batteries

Guifeng Chen, Junhua Li, Ning Liu, Yan Zhao, Junguang Tao, Gulnur Kalimuldina, Zhumabay Bakenov, Yongguang Zhang

Research output: Contribution to journalArticle

Abstract

Improving sulfur redox kinetics and cycling stability of lithium-sulfur (Li-S) batteries through controlling inherent dissolution of polysulfides and following shuttle effect is pivotal for further progress of this promising electrochemical system. In this work, three-dimensional porous microspheres composed of nanosized sulfur particles, nitrogen-doped oxygen-deficient TiO2-x nanorods and reduced graphene oxide (N-TiO2-x/RGO/S) were synthesized as sulfur host material for the first time in spray-drying process. The microspheres construction with void spaces mitigated volumetric expansion upon charge/discharge cycling and improved sulfur utilization. Furthermore, the N-TiO2-x nanorods enhanced the conductivity of the material and exhibited strong capability for adsorption and the migration of lithium polysulfides, which was demonstrated by the density functional theory (DFT) calculations. Due to such advantages, the N-TiO2-x/RGO/S cathode delivered excellent rate capability and stable cycle performance at 1.0 C over 300 cycles with a specific capacity about 700 mAh g−1. This novel design and preparation strategy also contributes to the materials engineering and structural design towards remarkable improvement of electrochemical performance of energy storage systems.

Original languageEnglish
Article number134968
JournalElectrochimica Acta
Volume326
DOIs
Publication statusPublished - Dec 5 2019

Fingerprint

Spray drying
Graphite
Microspheres
Sulfur
Graphene
Nitrogen
Oxygen
Polysulfides
Oxides
Nanorods
Structural design
Lithium
Energy storage
Density functional theory
Dissolution
Cathodes
Adsorption
Kinetics
Lithium sulfur batteries
sulfur monoxide

Keywords

  • Lithium-sulfur batteries
  • Nitrogen doped TiO
  • Oxygen-deficient TiO
  • Reduced graphene oxide

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

Cite this

Synthesis of nitrogen-doped oxygen-deficient TiO2-x/reduced graphene oxide/sulfur microspheres via spray drying process for lithium-sulfur batteries. / Chen, Guifeng; Li, Junhua; Liu, Ning; Zhao, Yan; Tao, Junguang; Kalimuldina, Gulnur; Bakenov, Zhumabay; Zhang, Yongguang.

In: Electrochimica Acta, Vol. 326, 134968, 05.12.2019.

Research output: Contribution to journalArticle

Chen, Guifeng ; Li, Junhua ; Liu, Ning ; Zhao, Yan ; Tao, Junguang ; Kalimuldina, Gulnur ; Bakenov, Zhumabay ; Zhang, Yongguang. / Synthesis of nitrogen-doped oxygen-deficient TiO2-x/reduced graphene oxide/sulfur microspheres via spray drying process for lithium-sulfur batteries. In: Electrochimica Acta. 2019 ; Vol. 326.
@article{641a1c843adc476a85f39fa261f24875,
title = "Synthesis of nitrogen-doped oxygen-deficient TiO2-x/reduced graphene oxide/sulfur microspheres via spray drying process for lithium-sulfur batteries",
abstract = "Improving sulfur redox kinetics and cycling stability of lithium-sulfur (Li-S) batteries through controlling inherent dissolution of polysulfides and following shuttle effect is pivotal for further progress of this promising electrochemical system. In this work, three-dimensional porous microspheres composed of nanosized sulfur particles, nitrogen-doped oxygen-deficient TiO2-x nanorods and reduced graphene oxide (N-TiO2-x/RGO/S) were synthesized as sulfur host material for the first time in spray-drying process. The microspheres construction with void spaces mitigated volumetric expansion upon charge/discharge cycling and improved sulfur utilization. Furthermore, the N-TiO2-x nanorods enhanced the conductivity of the material and exhibited strong capability for adsorption and the migration of lithium polysulfides, which was demonstrated by the density functional theory (DFT) calculations. Due to such advantages, the N-TiO2-x/RGO/S cathode delivered excellent rate capability and stable cycle performance at 1.0 C over 300 cycles with a specific capacity about 700 mAh g−1. This novel design and preparation strategy also contributes to the materials engineering and structural design towards remarkable improvement of electrochemical performance of energy storage systems.",
keywords = "Lithium-sulfur batteries, Nitrogen doped TiO, Oxygen-deficient TiO, Reduced graphene oxide",
author = "Guifeng Chen and Junhua Li and Ning Liu and Yan Zhao and Junguang Tao and Gulnur Kalimuldina and Zhumabay Bakenov and Yongguang Zhang",
year = "2019",
month = "12",
day = "5",
doi = "10.1016/j.electacta.2019.134968",
language = "English",
volume = "326",
journal = "Electrochimica Acta",
issn = "0013-4686",
publisher = "Elsevier",

}

TY - JOUR

T1 - Synthesis of nitrogen-doped oxygen-deficient TiO2-x/reduced graphene oxide/sulfur microspheres via spray drying process for lithium-sulfur batteries

AU - Chen, Guifeng

AU - Li, Junhua

AU - Liu, Ning

AU - Zhao, Yan

AU - Tao, Junguang

AU - Kalimuldina, Gulnur

AU - Bakenov, Zhumabay

AU - Zhang, Yongguang

PY - 2019/12/5

Y1 - 2019/12/5

N2 - Improving sulfur redox kinetics and cycling stability of lithium-sulfur (Li-S) batteries through controlling inherent dissolution of polysulfides and following shuttle effect is pivotal for further progress of this promising electrochemical system. In this work, three-dimensional porous microspheres composed of nanosized sulfur particles, nitrogen-doped oxygen-deficient TiO2-x nanorods and reduced graphene oxide (N-TiO2-x/RGO/S) were synthesized as sulfur host material for the first time in spray-drying process. The microspheres construction with void spaces mitigated volumetric expansion upon charge/discharge cycling and improved sulfur utilization. Furthermore, the N-TiO2-x nanorods enhanced the conductivity of the material and exhibited strong capability for adsorption and the migration of lithium polysulfides, which was demonstrated by the density functional theory (DFT) calculations. Due to such advantages, the N-TiO2-x/RGO/S cathode delivered excellent rate capability and stable cycle performance at 1.0 C over 300 cycles with a specific capacity about 700 mAh g−1. This novel design and preparation strategy also contributes to the materials engineering and structural design towards remarkable improvement of electrochemical performance of energy storage systems.

AB - Improving sulfur redox kinetics and cycling stability of lithium-sulfur (Li-S) batteries through controlling inherent dissolution of polysulfides and following shuttle effect is pivotal for further progress of this promising electrochemical system. In this work, three-dimensional porous microspheres composed of nanosized sulfur particles, nitrogen-doped oxygen-deficient TiO2-x nanorods and reduced graphene oxide (N-TiO2-x/RGO/S) were synthesized as sulfur host material for the first time in spray-drying process. The microspheres construction with void spaces mitigated volumetric expansion upon charge/discharge cycling and improved sulfur utilization. Furthermore, the N-TiO2-x nanorods enhanced the conductivity of the material and exhibited strong capability for adsorption and the migration of lithium polysulfides, which was demonstrated by the density functional theory (DFT) calculations. Due to such advantages, the N-TiO2-x/RGO/S cathode delivered excellent rate capability and stable cycle performance at 1.0 C over 300 cycles with a specific capacity about 700 mAh g−1. This novel design and preparation strategy also contributes to the materials engineering and structural design towards remarkable improvement of electrochemical performance of energy storage systems.

KW - Lithium-sulfur batteries

KW - Nitrogen doped TiO

KW - Oxygen-deficient TiO

KW - Reduced graphene oxide

UR - http://www.scopus.com/inward/record.url?scp=85072867445&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85072867445&partnerID=8YFLogxK

U2 - 10.1016/j.electacta.2019.134968

DO - 10.1016/j.electacta.2019.134968

M3 - Article

AN - SCOPUS:85072867445

VL - 326

JO - Electrochimica Acta

JF - Electrochimica Acta

SN - 0013-4686

M1 - 134968

ER -