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*

*Corresponding author

Research output: Contribution to journalJournal articleResearchpeer-review

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.
Original languageEnglish
Article number104032
JournalNano Energy
Volume65
Number of pages9
ISSN2211-2855
DOIs
Publication statusPublished - Nov 2019

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

Keywords

  • Lithium ion batteries
  • Anodes
  • Metal-organic frameworks
  • Graphene
  • Order-disorder transition

Cite this

@article{855de67c31c0455c944fa538571fc504,
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",
year = "2019",
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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.

In: Nano Energy, Vol. 65, 104032, 11.2019.

Research output: Contribution to journalJournal articleResearchpeer-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

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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

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