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Bottom-Up Synthesis of MoS2 /CNTs Hollow Polyhedron with 1T/2H Hybrid Phase for Superior Potassium-Ion Storage.
Small. 2020 Oct; 16(43):e2004178.S

Abstract

Enslaved to the large-size K-ions, the construction of suitable anode materials with superior and stable potassium-ion storage properties is a major challenge. 1T phase MoS2 possesses higher conductivity, bigger interlayer distance, and more electrochemically active sites than the 2H phase, which offers intriguing benefits for energy-related applications. In this work, the 1T/2H-phase hybrid MoS2 nanosheets are successfully anchored in the N-doped carbon nanotube hollow polyhedron (1T/2H-MoS2 /NCNHP) by a bottom-up solvothermal method. For the synthesized 1T/2H-MoS2 /NCNHP, the fewer-layer 1T/2H-MoS2 nanosheets are embedded in an N-doped carbon nanotube hollow polyhedron, with an enlarged interlayer spacing of 0.96 nm. When evaluated as anode material for potassium-ion batteries, the 1T/2H-MoS2 /NCNHP hybrid presents outstanding potassium storage performance. It delivers a high-specific capacity of 519.2 mAh g-1 at 50 mA g-1 and maintains 281.2 mAh g-1 at 1 A g-1 over 500 cycles. The good potassium-ion electrochemical performance is attributed to the rational structural design and the synergistic effect of the components. Moreover, the 1T-MoS2 nanosheet has excellent electrical conductivity and its enlarged interlayer spacing reduces the barrier for the embedding and stripping of K ions. Finally, the practical application of the 1T/2H-MoS2 /NCNHP electrode material is also evaluated by assembled K-ion full cells.

Authors+Show Affiliations

School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, P. R. China.School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, P. R. China.School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, P. R. China.School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, P. R. China.School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, P. R. China.School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, P. R. China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

33000901

Citation

Wu, Kuan, et al. "Bottom-Up Synthesis of MoS2 /CNTs Hollow Polyhedron With 1T/2H Hybrid Phase for Superior Potassium-Ion Storage." Small (Weinheim an Der Bergstrasse, Germany), vol. 16, no. 43, 2020, pp. e2004178.
Wu K, Cao X, Li M, et al. Bottom-Up Synthesis of MoS2 /CNTs Hollow Polyhedron with 1T/2H Hybrid Phase for Superior Potassium-Ion Storage. Small. 2020;16(43):e2004178.
Wu, K., Cao, X., Li, M., Lei, B., Zhan, J., & Wu, M. (2020). Bottom-Up Synthesis of MoS2 /CNTs Hollow Polyhedron with 1T/2H Hybrid Phase for Superior Potassium-Ion Storage. Small (Weinheim an Der Bergstrasse, Germany), 16(43), e2004178. https://doi.org/10.1002/smll.202004178
Wu K, et al. Bottom-Up Synthesis of MoS2 /CNTs Hollow Polyhedron With 1T/2H Hybrid Phase for Superior Potassium-Ion Storage. Small. 2020;16(43):e2004178. PubMed PMID: 33000901.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Bottom-Up Synthesis of MoS2 /CNTs Hollow Polyhedron with 1T/2H Hybrid Phase for Superior Potassium-Ion Storage. AU - Wu,Kuan, AU - Cao,Xu, AU - Li,Minyue, AU - Lei,Bo, AU - Zhan,Jing, AU - Wu,Minghong, Y1 - 2020/09/30/ PY - 2020/07/10/received PY - 2020/07/30/revised PY - 2020/10/2/pubmed PY - 2020/10/2/medline PY - 2020/10/1/entrez KW - 1T MoS2 KW - N-doped carbon nanotubes KW - full cells KW - hollow polyhedrons KW - potassium-ion storage SP - e2004178 EP - e2004178 JF - Small (Weinheim an der Bergstrasse, Germany) JO - Small VL - 16 IS - 43 N2 - Enslaved to the large-size K-ions, the construction of suitable anode materials with superior and stable potassium-ion storage properties is a major challenge. 1T phase MoS2 possesses higher conductivity, bigger interlayer distance, and more electrochemically active sites than the 2H phase, which offers intriguing benefits for energy-related applications. In this work, the 1T/2H-phase hybrid MoS2 nanosheets are successfully anchored in the N-doped carbon nanotube hollow polyhedron (1T/2H-MoS2 /NCNHP) by a bottom-up solvothermal method. For the synthesized 1T/2H-MoS2 /NCNHP, the fewer-layer 1T/2H-MoS2 nanosheets are embedded in an N-doped carbon nanotube hollow polyhedron, with an enlarged interlayer spacing of 0.96 nm. When evaluated as anode material for potassium-ion batteries, the 1T/2H-MoS2 /NCNHP hybrid presents outstanding potassium storage performance. It delivers a high-specific capacity of 519.2 mAh g-1 at 50 mA g-1 and maintains 281.2 mAh g-1 at 1 A g-1 over 500 cycles. The good potassium-ion electrochemical performance is attributed to the rational structural design and the synergistic effect of the components. Moreover, the 1T-MoS2 nanosheet has excellent electrical conductivity and its enlarged interlayer spacing reduces the barrier for the embedding and stripping of K ions. Finally, the practical application of the 1T/2H-MoS2 /NCNHP electrode material is also evaluated by assembled K-ion full cells. SN - 1613-6829 UR - https://www.unboundmedicine.com/medline/citation/33000901/Bottom_Up_Synthesis_of_MoS2_/CNTs_Hollow_Polyhedron_with_1T/2H_Hybrid_Phase_for_Superior_Potassium_Ion_Storage_ L2 - https://doi.org/10.1002/smll.202004178 DB - PRIME DP - Unbound Medicine ER -
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