TY - JOUR
T1 - Weaving 3D highly conductive hierarchically interconnected nanoporous web by threading MOF crystals onto multi walled carbon nanotubes for high performance Li–Se battery
AU - Li, Chao
AU - Wang, Yingying
AU - Li, Hongyan
AU - Liu, Jing
AU - Song, Jianping
AU - Fusaro, Luca
AU - Hu, Zhi Yi
AU - Chen, Yanxin
AU - Li, Yu
AU - Su, Bao Lian
N1 - Funding Information:
C. Li thanks the financial support from the China Scholarship Council (CSC) and a scholarship from the Laboratory of Inorganic Materials Chemistry , Université de Namur . The authors thank the support of bis(trifluoromethane)sulfonimide lithium salt from Solvey Company. This work was supported by the National Postdoctoral Program ( 2020M672782 ), National Natural Science Foundation of China (No. U1663225 ), Changjiang Scholars and Innovative Research Team in University (No. IRT_15R52 ), National 111 project from the Ministry of Science and Technology and the Ministry of Education of China and the National Key R&D Program of China (No. 2016YFA0202602 ).
Funding Information:
C. Li thanks the financial support from the China Scholarship Council (CSC) and a scholarship from the Laboratory of Inorganic Materials Chemistry, Université de Namur. The authors thank the support of bis(trifluoromethane)sulfonimide lithium salt from Solvey Company. This work was supported by the National Postdoctoral Program (2020M672782), National Natural Science Foundation of China (No. U1663225), Changjiang Scholars and Innovative Research Team in University (No. IRT_15R52), National 111 project from the Ministry of Science and Technology and the Ministry of Education of China and the National Key R&D Program of China (No. 2016YFA0202602).
Publisher Copyright:
© 2020 Science Press
PY - 2021/8
Y1 - 2021/8
N2 - Lithium–selenium (Li–Se) battery has attracted growing attention. Nevertheless, its practical application is still impeded by the shuttle effect of the formed polyselenides. Herein, we report in-situ hydrothermal weaving the three-dimensional (3D) highly conductive hierarchically interconnected nanoporous web by threading microporous metal organic framework MIL-68(Al) crystals onto multi-walled carbon nanotubes (MWCNTs). Such 3D hierarchically nanoporous web (3D MIL-68 (Al)@MWCNTs web) with a very high surface area, a large amount of micropores, electrical conductivity and elasticity strongly traps the soluble polyselenides during the electrochemical reaction and significantly facilitates lithium ion diffusion and electron transportation. Molecular dynamic calculation confirmed the strong affinity of MIL-68 (Al) for the adsorption of polyselenides, quite suitable for Li–Se battery. Their hexahedral channels (1.56 nm) are more efficient for the confinement of polyselenides and for the diffusion of electrolytes compared to their smaller triangular channels (0.63 nm). All these excellent characteristics of 3D MIL-68 (Al)@MWCNTs web with suitable confinement of a large amount of selenium and the conductive linkage between MIL-68(Al) host by MWCNTs result in a high capacity of 453 mAh/g at 0.2C with 99.5% coulombic efficiency after 200 cycles with significantly improved cycle stability and rate performance. The 3D MIL-68 (Al)@MWCNTs web presents a good performance in Li–Se battery in term of the specific capacity and cycling stability and also in terms of rate performance compared with all the metal–organic framework (MOF) based or MOF derived porous carbons used in Li–Se battery.
AB - Lithium–selenium (Li–Se) battery has attracted growing attention. Nevertheless, its practical application is still impeded by the shuttle effect of the formed polyselenides. Herein, we report in-situ hydrothermal weaving the three-dimensional (3D) highly conductive hierarchically interconnected nanoporous web by threading microporous metal organic framework MIL-68(Al) crystals onto multi-walled carbon nanotubes (MWCNTs). Such 3D hierarchically nanoporous web (3D MIL-68 (Al)@MWCNTs web) with a very high surface area, a large amount of micropores, electrical conductivity and elasticity strongly traps the soluble polyselenides during the electrochemical reaction and significantly facilitates lithium ion diffusion and electron transportation. Molecular dynamic calculation confirmed the strong affinity of MIL-68 (Al) for the adsorption of polyselenides, quite suitable for Li–Se battery. Their hexahedral channels (1.56 nm) are more efficient for the confinement of polyselenides and for the diffusion of electrolytes compared to their smaller triangular channels (0.63 nm). All these excellent characteristics of 3D MIL-68 (Al)@MWCNTs web with suitable confinement of a large amount of selenium and the conductive linkage between MIL-68(Al) host by MWCNTs result in a high capacity of 453 mAh/g at 0.2C with 99.5% coulombic efficiency after 200 cycles with significantly improved cycle stability and rate performance. The 3D MIL-68 (Al)@MWCNTs web presents a good performance in Li–Se battery in term of the specific capacity and cycling stability and also in terms of rate performance compared with all the metal–organic framework (MOF) based or MOF derived porous carbons used in Li–Se battery.
KW - 3D hierarchically nanoporous web
KW - Lithium selenium battery
KW - Metal–organic framework (MOF)
KW - Multi walled carbon nanotubes
KW - Selenium confinement
UR - http://www.scopus.com/inward/record.url?scp=85097464675&partnerID=8YFLogxK
U2 - 10.1016/j.jechem.2020.11.023
DO - 10.1016/j.jechem.2020.11.023
M3 - Article
AN - SCOPUS:85097464675
SN - 2095-4956
VL - 59
SP - 396
EP - 404
JO - Journal of Energy Chemistry
JF - Journal of Energy Chemistry
ER -