MOF-graphene composite with long order-disorder process for high-performance lithium ion batteries

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

Publikation: Konferencebidrag uden forlag/tidsskriftKonferenceabstrakt til konferenceFormidling

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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 potential electrode material for lithium-ion batteries (LIBs). However, the impact of lithiation/delithiation on structures of MOFs have been investigated to very limited extent. In this presentation, we report our initial advances in understanding the relationship between the structure of MOFs and the electrochemical performances. We prepared Al-MOF and combined it with graphene sheets by a facile self-assembly process. Compared with pristine MOFs, the composite showed a prolonged orderdisorder transition and greatly enhanced electrochemical performances. During the lithiation/delithiation process, the bulk MOFs crystal particles were transformed into fine amorphous powders, which were protected by the graphene sheets from detaching
from the electrical current collector. The enhancement of the electrochemical
performances is ascribed to the effect of the synergy between the order-disorder
transition in MOF particles and the addition of graphene sheets. The order-disorder transition remarkably increased the capacity of the composite from 60 to 400 mAh g-1 at a current density of 100 mA g-1 after 100 cycles. At the current density of 1000 mA g-1, the composite experienced an order-disorder transition (activation process) in the first 500 cycles and then the capacity exhibited a decay of 0.02% per cycle in the subsequent 500 cycles, suggesting its high cycling stability. This work implies that the order-disorder engineering concept can be used to improve both the capacity and the cycling stability of anode materials with great volume changes.
OriginalsprogEngelsk
Publikationsdato2019
Antal sider1
StatusUdgivet - 2019
Begivenhed4th International Conference on Nanoenergy and Nanosystems 2019 - Beijing, Kina
Varighed: 15 jun. 201917 jun. 2019

Konference

Konference4th International Conference on Nanoenergy and Nanosystems 2019
LandKina
ByBeijing
Periode15/06/201917/06/2019

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Order disorder transitions
Graphite
Metals
Composite materials
Current density
Lithium-ion batteries
Powders
Self assembly
Anodes
Porosity
Chemical activation
Crystals
Electrodes

Citer dette

Gao, C., Wang, P., Kær, S. K., Zhang, Y., & Yue, Y. (2019). MOF-graphene composite with long order-disorder process for high-performance lithium ion batteries. Abstract fra 4th International Conference on Nanoenergy and Nanosystems 2019 , Beijing, Kina.
Gao, Chengwei ; Wang, Peixing ; Kær, Søren Knudsen ; Zhang, Yanfei ; Yue, Yuanzheng. / MOF-graphene composite with long order-disorder process for high-performance lithium ion batteries. Abstract fra 4th International Conference on Nanoenergy and Nanosystems 2019 , Beijing, Kina.1 s.
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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 potential electrode material for lithium-ion batteries (LIBs). However, the impact of lithiation/delithiation on structures of MOFs have been investigated to very limited extent. In this presentation, we report our initial advances in understanding the relationship between the structure of MOFs and the electrochemical performances. We prepared Al-MOF and combined it with graphene sheets by a facile self-assembly process. Compared with pristine MOFs, the composite showed a prolonged orderdisorder transition and greatly enhanced electrochemical performances. During the lithiation/delithiation process, the bulk MOFs crystal particles were transformed into fine amorphous powders, which were protected by the graphene sheets from detachingfrom the electrical current collector. The enhancement of the electrochemicalperformances is ascribed to the effect of the synergy between the order-disordertransition in MOF particles and the addition of graphene sheets. The order-disorder transition remarkably increased the capacity of the composite from 60 to 400 mAh g-1 at a current density of 100 mA g-1 after 100 cycles. At the current density of 1000 mA g-1, the composite experienced an order-disorder transition (activation process) in the first 500 cycles and then the capacity exhibited a decay of 0.02{\%} per cycle in the subsequent 500 cycles, suggesting its high cycling stability. This work implies that the order-disorder engineering concept can be used to improve both the capacity and the cycling stability of anode materials with great volume changes.",
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note = "4th International Conference on Nanoenergy and Nanosystems 2019 ; Conference date: 15-06-2019 Through 17-06-2019",

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MOF-graphene composite with long order-disorder process for high-performance lithium ion batteries. / Gao, Chengwei; Wang, Peixing; Kær, Søren Knudsen; Zhang, Yanfei; Yue, Yuanzheng.

2019. Abstract fra 4th International Conference on Nanoenergy and Nanosystems 2019 , Beijing, Kina.

Publikation: Konferencebidrag uden forlag/tidsskriftKonferenceabstrakt til konferenceFormidling

TY - ABST

T1 - MOF-graphene composite with long order-disorder process for high-performance lithium ion batteries

AU - Gao, Chengwei

AU - Wang, Peixing

AU - Kær, Søren Knudsen

AU - Zhang, Yanfei

AU - Yue, Yuanzheng

PY - 2019

Y1 - 2019

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 potential electrode material for lithium-ion batteries (LIBs). However, the impact of lithiation/delithiation on structures of MOFs have been investigated to very limited extent. In this presentation, we report our initial advances in understanding the relationship between the structure of MOFs and the electrochemical performances. We prepared Al-MOF and combined it with graphene sheets by a facile self-assembly process. Compared with pristine MOFs, the composite showed a prolonged orderdisorder transition and greatly enhanced electrochemical performances. During the lithiation/delithiation process, the bulk MOFs crystal particles were transformed into fine amorphous powders, which were protected by the graphene sheets from detachingfrom the electrical current collector. The enhancement of the electrochemicalperformances is ascribed to the effect of the synergy between the order-disordertransition in MOF particles and the addition of graphene sheets. The order-disorder transition remarkably increased the capacity of the composite from 60 to 400 mAh g-1 at a current density of 100 mA g-1 after 100 cycles. At the current density of 1000 mA g-1, the composite experienced an order-disorder transition (activation process) in the first 500 cycles and then the capacity exhibited a decay of 0.02% per cycle in the subsequent 500 cycles, suggesting its high cycling stability. This work implies that the order-disorder engineering concept can be used to improve both the capacity and the cycling stability of anode materials with great volume changes.

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 potential electrode material for lithium-ion batteries (LIBs). However, the impact of lithiation/delithiation on structures of MOFs have been investigated to very limited extent. In this presentation, we report our initial advances in understanding the relationship between the structure of MOFs and the electrochemical performances. We prepared Al-MOF and combined it with graphene sheets by a facile self-assembly process. Compared with pristine MOFs, the composite showed a prolonged orderdisorder transition and greatly enhanced electrochemical performances. During the lithiation/delithiation process, the bulk MOFs crystal particles were transformed into fine amorphous powders, which were protected by the graphene sheets from detachingfrom the electrical current collector. The enhancement of the electrochemicalperformances is ascribed to the effect of the synergy between the order-disordertransition in MOF particles and the addition of graphene sheets. The order-disorder transition remarkably increased the capacity of the composite from 60 to 400 mAh g-1 at a current density of 100 mA g-1 after 100 cycles. At the current density of 1000 mA g-1, the composite experienced an order-disorder transition (activation process) in the first 500 cycles and then the capacity exhibited a decay of 0.02% per cycle in the subsequent 500 cycles, suggesting its high cycling stability. This work implies that the order-disorder engineering concept can be used to improve both the capacity and the cycling stability of anode materials with great volume changes.

KW - Lithium ion batteries

KW - Anode

KW - Metal-organic Framework

KW - Order-Disorder Transition

M3 - Conference abstract for conference

ER -

Gao C, Wang P, Kær SK, Zhang Y, Yue Y. MOF-graphene composite with long order-disorder process for high-performance lithium ion batteries. 2019. Abstract fra 4th International Conference on Nanoenergy and Nanosystems 2019 , Beijing, Kina.