Thin-film electrodes were prepared using a one-step drop-casting strategy without polymer binder and carbon black. The electrodes exhibit a thin-layer structure, which is an intriguing architecture for lithium-ion battery applications. A high reversible capacity (335.3 and 311.6 mAh g−1 for ZIF-8 and ZIF-67, respectively), good rate performance, and exceptionally cycling stability (about 95.5% initial capacity was retained after 100 cycles at a high current rate of 5 C) were observed in this study. Such an excellent electrochemical performance of the film electrodes is attributed to the thin-layer architecture, which provides easy access for Li+ ions to permeate the whole electrodes because of the shortened diffusion paths, and also to the unique property of the MOFs without the collapse of its structure.
Bibliographical noteFunding Information:
This project is sponsored by the Shanghai University of Engineering Science Innovation Fund for Graduate Students (16KY0404) and the National Natural Science Foundation of China (11602134), and supported by the Shanghai Municipal Education Commission (High-energy Beam Intelligent Processing and Green Manufacturing) and the University of Minnesota Initiative for Renewable Energy and the Environment (IREE). Parts of this work were carried out in the Characterization Facility, University of Minnesota, which receives partial support from the NSF through the MRSEC program.
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