Details
| Original language | English |
|---|---|
| Pages (from-to) | 6651-6658 |
| Number of pages | 8 |
| Journal | Journal of Materials Chemistry A |
| Volume | 7 |
| Issue number | 12 |
| Early online date | 20 Feb 2019 |
| Publication status | Published - 28 Mar 2019 |
| Externally published | Yes |
Abstract
Quantitatively elucidating the reaction kinetics of Li-sulfur (Li-S) batteries is always crucial in optimizing cathode structures but challenging as well. Herein, we study and compare the reaction mechanism and kinetics of Li-S batteries via operando X-ray diffraction (XRD) and quantitative analysis based on several cathode structures. Operando XRD indicates that β-S 8 has different nucleation orientations on MnO 2 and carbon surfaces due to the different surface free energies. The quantitative analysis reveals that polysulfides encapsulated in MnO 2 nanosheets result in fast Li 2S and β-S 8 nucleation in the discharge and charge processes, respectively. It also shows that open-hollow S@MnO 2 exhibits faster S consumption and higher sulfur utilization than the solid core-shell S@MnO 2 and carbon black/S. Our work provides deep insight into the reaction mechanism and kinetics of Li-S batteries and indicates that the cathode structures and host materials play critical roles in enhancing the reaction kinetics.
ASJC Scopus subject areas
- Chemistry(all)
- General Chemistry
- Energy(all)
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
- General Materials Science
Sustainable Development Goals
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In: Journal of Materials Chemistry A, Vol. 7, No. 12, 28.03.2019, p. 6651-6658.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Elucidating the reaction kinetics of lithium-sulfur batteries by operando XRD based on an open-hollow S@MnO2 cathode
AU - Huang, Shaozhuan
AU - Liu, Lixiang
AU - Wang, Ye
AU - Shang, Yang
AU - Zhang, Lin
AU - Wang, Jiawei
AU - Zheng, Yun
AU - Schmidt, Oliver G.
AU - Yang, Hui Ying
N1 - Funding Information: This research is supported by the National Research Foundation, Prime Minister's Office, Singapore under its NRF-ANR Joint Grant Call (NRF-ANR Award No. NRF2015-NRF-ANR000-CEENEMA).
PY - 2019/3/28
Y1 - 2019/3/28
N2 - Quantitatively elucidating the reaction kinetics of Li-sulfur (Li-S) batteries is always crucial in optimizing cathode structures but challenging as well. Herein, we study and compare the reaction mechanism and kinetics of Li-S batteries via operando X-ray diffraction (XRD) and quantitative analysis based on several cathode structures. Operando XRD indicates that β-S 8 has different nucleation orientations on MnO 2 and carbon surfaces due to the different surface free energies. The quantitative analysis reveals that polysulfides encapsulated in MnO 2 nanosheets result in fast Li 2S and β-S 8 nucleation in the discharge and charge processes, respectively. It also shows that open-hollow S@MnO 2 exhibits faster S consumption and higher sulfur utilization than the solid core-shell S@MnO 2 and carbon black/S. Our work provides deep insight into the reaction mechanism and kinetics of Li-S batteries and indicates that the cathode structures and host materials play critical roles in enhancing the reaction kinetics.
AB - Quantitatively elucidating the reaction kinetics of Li-sulfur (Li-S) batteries is always crucial in optimizing cathode structures but challenging as well. Herein, we study and compare the reaction mechanism and kinetics of Li-S batteries via operando X-ray diffraction (XRD) and quantitative analysis based on several cathode structures. Operando XRD indicates that β-S 8 has different nucleation orientations on MnO 2 and carbon surfaces due to the different surface free energies. The quantitative analysis reveals that polysulfides encapsulated in MnO 2 nanosheets result in fast Li 2S and β-S 8 nucleation in the discharge and charge processes, respectively. It also shows that open-hollow S@MnO 2 exhibits faster S consumption and higher sulfur utilization than the solid core-shell S@MnO 2 and carbon black/S. Our work provides deep insight into the reaction mechanism and kinetics of Li-S batteries and indicates that the cathode structures and host materials play critical roles in enhancing the reaction kinetics.
UR - https://publons.com/publon/20111924/
UR - http://www.scopus.com/inward/record.url?scp=85063137143&partnerID=8YFLogxK
U2 - 10.1039/c9ta00199a
DO - 10.1039/c9ta00199a
M3 - Article
VL - 7
SP - 6651
EP - 6658
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
SN - 2050-7488
IS - 12
ER -