Details
| Original language | English |
|---|---|
| Article number | 2002462 |
| Journal | Advanced functional materials |
| Volume | 30 |
| Issue number | 32 |
| Publication status | Published - 7 Aug 2020 |
Abstract
Several critical issues, such as the shuttling effect and the sluggish reaction kinetics, exist in the design of high-performance lithium–sulfur (Li-S) batteries. Here, it is reported that nitrogen doping can simultaneously and significantly improve both the immobilization and catalyzation effects of Co 9S 8 nanoparticles in Li-S batteries. Combining the theoretical calculations with experimental investigations, it is revealed that nitrogen atoms can increase the binding energies between LiPSs and Co 9S 8, and as well as alleviate the sluggish kinetics of Li-S chemistry in the Li 2S 6 cathode. The same effects are also observed when adding N-Co 9S 8 nanoparticles into the commercial Li 2S cathode (which has various intrinsic advantages, but unfortunately a high overpotential). A remarkable improvement in the battery performances in both cases is observed. The work brings heteroatom-doped Co 9S 8 to the attention of designing high-performance Li-S batteries. A fundamental understanding of the inhibition of LiPSs shuttle and the catalytic effect of Li 2S in the newly developed system may encourage more effort along this interesting direction.
Keywords
- adsorption, catalysis, Li-S batteries, lithium polysulfides, N-CoS nanoparticles, N-Co S nanoparticles
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Condensed Matter Physics
- Chemistry(all)
- General Chemistry
- Materials Science(all)
- General Materials Science
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In: Advanced functional materials, Vol. 30, No. 32, 2002462, 07.08.2020.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Nitrogen Doping Improves the Immobilization and Catalytic Effects of Co9S8 in Li-S Batteries
AU - Liu, Yuping
AU - Ma, Shuangying
AU - Liu, Lifeng
AU - Koch, Julian
AU - Rosebrock, Marina
AU - Li, Taoran
AU - Bettels, Frederik
AU - He, Tao
AU - Pfnür, Herbert
AU - Bigall, Nadja C.
AU - Feldhoff, Armin
AU - Ding, Fei
AU - Zhang, Lin
N1 - Funding Information: The authors are thankful to the funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement Nos. 714429 and 715770), and the financial support from the German Federal Ministry of Education and Research (BMBF) within the framework of the program NanoMatFutur (support code 03X5525). Dr. S.M. is grateful to Prof. Andreas Koehn for the financial support and the support by the State of Baden-W?rttemberg through bwHPC.
PY - 2020/8/7
Y1 - 2020/8/7
N2 - Several critical issues, such as the shuttling effect and the sluggish reaction kinetics, exist in the design of high-performance lithium–sulfur (Li-S) batteries. Here, it is reported that nitrogen doping can simultaneously and significantly improve both the immobilization and catalyzation effects of Co 9S 8 nanoparticles in Li-S batteries. Combining the theoretical calculations with experimental investigations, it is revealed that nitrogen atoms can increase the binding energies between LiPSs and Co 9S 8, and as well as alleviate the sluggish kinetics of Li-S chemistry in the Li 2S 6 cathode. The same effects are also observed when adding N-Co 9S 8 nanoparticles into the commercial Li 2S cathode (which has various intrinsic advantages, but unfortunately a high overpotential). A remarkable improvement in the battery performances in both cases is observed. The work brings heteroatom-doped Co 9S 8 to the attention of designing high-performance Li-S batteries. A fundamental understanding of the inhibition of LiPSs shuttle and the catalytic effect of Li 2S in the newly developed system may encourage more effort along this interesting direction.
AB - Several critical issues, such as the shuttling effect and the sluggish reaction kinetics, exist in the design of high-performance lithium–sulfur (Li-S) batteries. Here, it is reported that nitrogen doping can simultaneously and significantly improve both the immobilization and catalyzation effects of Co 9S 8 nanoparticles in Li-S batteries. Combining the theoretical calculations with experimental investigations, it is revealed that nitrogen atoms can increase the binding energies between LiPSs and Co 9S 8, and as well as alleviate the sluggish kinetics of Li-S chemistry in the Li 2S 6 cathode. The same effects are also observed when adding N-Co 9S 8 nanoparticles into the commercial Li 2S cathode (which has various intrinsic advantages, but unfortunately a high overpotential). A remarkable improvement in the battery performances in both cases is observed. The work brings heteroatom-doped Co 9S 8 to the attention of designing high-performance Li-S batteries. A fundamental understanding of the inhibition of LiPSs shuttle and the catalytic effect of Li 2S in the newly developed system may encourage more effort along this interesting direction.
KW - adsorption
KW - catalysis
KW - Li-S batteries
KW - lithium polysulfides
KW - N-CoS nanoparticles
KW - N-Co S nanoparticles
UR - http://www.scopus.com/inward/record.url?scp=85087204557&partnerID=8YFLogxK
U2 - 10.1002/adfm.202002462
DO - 10.1002/adfm.202002462
M3 - Article
VL - 30
JO - Advanced functional materials
JF - Advanced functional materials
SN - 1616-301X
IS - 32
M1 - 2002462
ER -