期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 10, 期 7, 页码 3559-3372出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1ta08046f
关键词
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资金
- National Natural Science Foundation of China [NSFC 91834301, 91534102]
- Anhui Provincial Science and Technology Department Foundation [201903a05020021]
- Fundamental Research Funds for the Central Universities of China [JZ2021HGTA0175]
This study presents a positive bias driven exfoliation strategy to efficiently recycle spent LiCoO2 into ultra-thin CoOOH nanosheets for oxygen evolution reaction electrocatalysis. The method offers a general route to exfoliate layered materials with strong interlayer chemical bonding and proposes an effective route to re-utilize the spent electrode materials.
Exfoliation of bulk materials is an efficient approach for the fabrication of two-dimensional nanomaterials. However, the application of the method is mostly limited to the delamination of materials with weak interlayer interactions such as van der Waals forces. On the other hand, the massive consumption of layered cathode materials, e.g., LiCoO2, in portable electronic devices highlights the urgent necessity of developing effective strategies to recycle the spent electrode materials. In this work, based on a positive bias driven exfoliation strategy, we report for the first time the synergistic action of phase conversion and lattice expansion that leads to the exfoliation of spent LiCoO2 with robust Li-O interplanar bonding into ultra-thin CoOOH nanosheets, which are well adapted for oxygen evolution reaction (OER) electrocatalysis. This work not only offers a general route to exfoliate layered materials with strong interlayer chemical bonding, but also proposes an effective route to re-utilize the spent electrode materials.
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