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MnO2/rGO/CNTs Framework as a Sulfur Host for High-Performance Li-S Batteries.
Molecules. 2020 Apr 23; 25(8)M

Abstract

Lithium-sulfur batteries are very promising next-generation energy storage batteries due to their high theoretical specific capacity. However, the shuttle effect of lithium-sulfur batteries is one of the important bottlenecks that limits its rapid development. Herein, physical and chemical dual adsorption of lithium polysulfides are achieved by designing a novel framework structure consisting of MnO2, reduced graphene oxide (rGO), and carbon nanotubes (CNTs). The framework-structure composite of MnO2/rGO/CNTs is prepared by a simple hydrothermal method. The framework exhibits a uniform and abundant mesoporous structure (concentrating in ~12 nm). MnO2 is an α phase structure and the α-MnO2 also has a significant effect on the adsorption of lithium polysulfides. The rGO and CNTs provide a good physical adsorption interaction and good electronic conductivity for the dissolved polysulfides. As a result, the MnO2/rGO/CNTs/S cathode delivered a high initial capacity of 1201 mAh g-1 at 0.2 C. The average capacities were 916 mAh g-1, 736 mAh g-1, and 547 mAh g-1 at the current densities of 0.5 C, 1 C, and 2 C, respectively. In addition, when tested at 0.5 C, the MnO2/rGO/CNTs/S exhibited a high initial capacity of 1010 mAh g-1 and achieved 780 mAh g-1 after 200 cycles, with a low capacity decay rate of 0.11% per cycle. This framework-structure composite provides a simple way to improve the electrochemical performance of Li-S batteries.

Authors+Show Affiliations

College of Material Science and Engineering, Liaoning Technical University, Fuxin 123000, China.College of Material Science and Engineering, Liaoning Technical University, Fuxin 123000, China.College of Material Science and Engineering, Liaoning Technical University, Fuxin 123000, China.College of Mechanical Engineering, Liaoning Technical University, Fuxin 123000, China.College of Material Science and Engineering, Liaoning Technical University, Fuxin 123000, China.College of Mining, Liaoning Technical University, Fuxin 123000, China.College of Material Science and Engineering, Liaoning Technical University, Fuxin 123000, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32340399

Citation

Dong, Wei, et al. "MnO2/rGO/CNTs Framework as a Sulfur Host for High-Performance Li-S Batteries." Molecules (Basel, Switzerland), vol. 25, no. 8, 2020.
Dong W, Meng L, Hong X, et al. MnO2/rGO/CNTs Framework as a Sulfur Host for High-Performance Li-S Batteries. Molecules. 2020;25(8).
Dong, W., Meng, L., Hong, X., Liu, S., Shen, D., Xia, Y., & Yang, S. (2020). MnO2/rGO/CNTs Framework as a Sulfur Host for High-Performance Li-S Batteries. Molecules (Basel, Switzerland), 25(8). https://doi.org/10.3390/molecules25081989
Dong W, et al. MnO2/rGO/CNTs Framework as a Sulfur Host for High-Performance Li-S Batteries. Molecules. 2020 Apr 23;25(8) PubMed PMID: 32340399.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - MnO2/rGO/CNTs Framework as a Sulfur Host for High-Performance Li-S Batteries. AU - Dong,Wei, AU - Meng,Lingqiang, AU - Hong,Xiaodong, AU - Liu,Sizhe, AU - Shen,Ding, AU - Xia,Yingkai, AU - Yang,Shaobin, Y1 - 2020/04/23/ PY - 2020/03/30/received PY - 2020/04/17/revised PY - 2020/04/22/accepted PY - 2020/4/29/entrez PY - 2020/4/29/pubmed PY - 2020/4/29/medline KW - carbon nanotubes KW - cathode material KW - composites KW - lithium sulfur battery KW - α-MnO2 JF - Molecules (Basel, Switzerland) JO - Molecules VL - 25 IS - 8 N2 - Lithium-sulfur batteries are very promising next-generation energy storage batteries due to their high theoretical specific capacity. However, the shuttle effect of lithium-sulfur batteries is one of the important bottlenecks that limits its rapid development. Herein, physical and chemical dual adsorption of lithium polysulfides are achieved by designing a novel framework structure consisting of MnO2, reduced graphene oxide (rGO), and carbon nanotubes (CNTs). The framework-structure composite of MnO2/rGO/CNTs is prepared by a simple hydrothermal method. The framework exhibits a uniform and abundant mesoporous structure (concentrating in ~12 nm). MnO2 is an α phase structure and the α-MnO2 also has a significant effect on the adsorption of lithium polysulfides. The rGO and CNTs provide a good physical adsorption interaction and good electronic conductivity for the dissolved polysulfides. As a result, the MnO2/rGO/CNTs/S cathode delivered a high initial capacity of 1201 mAh g-1 at 0.2 C. The average capacities were 916 mAh g-1, 736 mAh g-1, and 547 mAh g-1 at the current densities of 0.5 C, 1 C, and 2 C, respectively. In addition, when tested at 0.5 C, the MnO2/rGO/CNTs/S exhibited a high initial capacity of 1010 mAh g-1 and achieved 780 mAh g-1 after 200 cycles, with a low capacity decay rate of 0.11% per cycle. This framework-structure composite provides a simple way to improve the electrochemical performance of Li-S batteries. SN - 1420-3049 UR - https://www.unboundmedicine.com/medline/citation/32340399/MnO2/rGO/CNTs_Framework_as_a_Sulfur_Host_for_High_Performance_Li_S_Batteries_ L2 - https://www.mdpi.com/resolver?pii=molecules25081989 DB - PRIME DP - Unbound Medicine ER -
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