The disordering-enhanced performances of the Al-MOF/graphene composite anodes for lithium ion batteries

Chengwei Gao, Peixing Wang, Zhaoyang Wang, Søren Knudsen Kær, Yanfei Zhang, Yuanzheng Yue*

*Kontaktforfatter

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

The metal-organic frameworks (MOFs) have gained considerable attention owing to their unique structures with tunable three-dimensional porous frameworks and numerous applications. The large surface area and great porosity make MOFs a promising electrode material for lithium-ion batteries. In this work, the focus is placed on an unexplored key issue, i.e., the impact of lithiation/delithiation on the structure of MOFs as anode materials. To do so, Al-MOF (chemical formula: Al(OH)[O2C–C6H4–CO2]) particles are synthesized, and then uniformly covered by graphene to form the Al-MOF/graphene composite. It is found that the lithiation/delithiation induces a pronounced structural change in the Al-MOF particles, which manifests as an order-disorder transition. This transition leads to the more open channels, thereby benefiting the diffusion and storage of Li+ ions. Compared with pure Al-MOF, the Al-MOF/graphene composite exhibits significantly enhanced electrochemical performances. Its capacity increases continuously from 60 to 400 mAh g−1 at the current density of 100 mA g−1. This work indicates that both the lithiation/delithiation induced order-disorder transition in MOFs and the optimized wrapping of MOF by graphene are crucial for enhancing the capacity and the cycling stability of anode materials.
OriginalsprogEngelsk
Artikelnummer104032
TidsskriftNano Energy
Vol/bind65
Antal sider9
ISSN2211-2855
DOI
StatusUdgivet - nov. 2019

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Graphene
Anodes
Metals
Composite materials
Order disorder transitions
Lithium-ion batteries
Organic chemicals
Current density
Porosity
Ions
Electrodes

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title = "The disordering-enhanced performances of the Al-MOF/graphene composite anodes for lithium ion batteries",
abstract = "The metal-organic frameworks (MOFs) have gained considerable attention owing to their unique structures with tunable three-dimensional porous frameworks and numerous applications. The large surface area and great porosity make MOFs a promising electrode material for lithium-ion batteries. In this work, the focus is placed on an unexplored key issue, i.e., the impact of lithiation/delithiation on the structure of MOFs as anode materials. To do so, Al-MOF (chemical formula: Al(OH)[O2C–C6H4–CO2]) particles are synthesized, and then uniformly covered by graphene to form the Al-MOF/graphene composite. It is found that the lithiation/delithiation induces a pronounced structural change in the Al-MOF particles, which manifests as an order-disorder transition. This transition leads to the more open channels, thereby benefiting the diffusion and storage of Li+ ions. Compared with pure Al-MOF, the Al-MOF/graphene composite exhibits significantly enhanced electrochemical performances. Its capacity increases continuously from 60 to 400 mAh g−1 at the current density of 100 mA g−1. This work indicates that both the lithiation/delithiation induced order-disorder transition in MOFs and the optimized wrapping of MOF by graphene are crucial for enhancing the capacity and the cycling stability of anode materials.",
keywords = "Lithium ion batteries, Anodes, Metal-organic frameworks, Graphene, Order-disorder transition",
author = "Chengwei Gao and Peixing Wang and Zhaoyang Wang and K{\ae}r, {S{\o}ren Knudsen} and Yanfei Zhang and Yuanzheng Yue",
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The disordering-enhanced performances of the Al-MOF/graphene composite anodes for lithium ion batteries. / Gao, Chengwei; Wang, Peixing; Wang, Zhaoyang; Kær, Søren Knudsen; Zhang, Yanfei; Yue, Yuanzheng.

I: Nano Energy, Bind 65, 104032, 11.2019.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - The disordering-enhanced performances of the Al-MOF/graphene composite anodes for lithium ion batteries

AU - Gao, Chengwei

AU - Wang, Peixing

AU - Wang, Zhaoyang

AU - Kær, Søren Knudsen

AU - Zhang, Yanfei

AU - Yue, Yuanzheng

PY - 2019/11

Y1 - 2019/11

N2 - The metal-organic frameworks (MOFs) have gained considerable attention owing to their unique structures with tunable three-dimensional porous frameworks and numerous applications. The large surface area and great porosity make MOFs a promising electrode material for lithium-ion batteries. In this work, the focus is placed on an unexplored key issue, i.e., the impact of lithiation/delithiation on the structure of MOFs as anode materials. To do so, Al-MOF (chemical formula: Al(OH)[O2C–C6H4–CO2]) particles are synthesized, and then uniformly covered by graphene to form the Al-MOF/graphene composite. It is found that the lithiation/delithiation induces a pronounced structural change in the Al-MOF particles, which manifests as an order-disorder transition. This transition leads to the more open channels, thereby benefiting the diffusion and storage of Li+ ions. Compared with pure Al-MOF, the Al-MOF/graphene composite exhibits significantly enhanced electrochemical performances. Its capacity increases continuously from 60 to 400 mAh g−1 at the current density of 100 mA g−1. This work indicates that both the lithiation/delithiation induced order-disorder transition in MOFs and the optimized wrapping of MOF by graphene are crucial for enhancing the capacity and the cycling stability of anode materials.

AB - The metal-organic frameworks (MOFs) have gained considerable attention owing to their unique structures with tunable three-dimensional porous frameworks and numerous applications. The large surface area and great porosity make MOFs a promising electrode material for lithium-ion batteries. In this work, the focus is placed on an unexplored key issue, i.e., the impact of lithiation/delithiation on the structure of MOFs as anode materials. To do so, Al-MOF (chemical formula: Al(OH)[O2C–C6H4–CO2]) particles are synthesized, and then uniformly covered by graphene to form the Al-MOF/graphene composite. It is found that the lithiation/delithiation induces a pronounced structural change in the Al-MOF particles, which manifests as an order-disorder transition. This transition leads to the more open channels, thereby benefiting the diffusion and storage of Li+ ions. Compared with pure Al-MOF, the Al-MOF/graphene composite exhibits significantly enhanced electrochemical performances. Its capacity increases continuously from 60 to 400 mAh g−1 at the current density of 100 mA g−1. This work indicates that both the lithiation/delithiation induced order-disorder transition in MOFs and the optimized wrapping of MOF by graphene are crucial for enhancing the capacity and the cycling stability of anode materials.

KW - Lithium ion batteries

KW - Anodes

KW - Metal-organic frameworks

KW - Graphene

KW - Order-disorder transition

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DO - 10.1016/j.nanoen.2019.104032

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VL - 65

JO - Nano Energy

JF - Nano Energy

SN - 2211-2855

M1 - 104032

ER -