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Metal–organic framework for dendrite-free anodes in aqueous rechargeable zinc batteries
- Title
- Metal–organic framework for dendrite-free anodes in aqueous rechargeable zinc batteries
- Authors
- Kim E.; Choi I.; Nam K.W.
- Ewha Authors
- 남관우
- SCOPUS Author ID
- 남관우
![scopus](/images/layout/icon2.png)
- Issue Date
- 2022
- Journal Title
- Electrochimica Acta
- ISSN
- 0013-4686
- Citation
- Electrochimica Acta vol. 425
- Keywords
- Aqueous rechargeable zinc batteries; Composite protective layer (CPL); Metal-organic framework (MOF); PVDF-HFP copolymer; Zinc dendrites
- Publisher
- Elsevier Ltd
- Indexed
- SCIE; SCOPUS
![scopus](/images/layout/scopus2.gif)
- Document Type
- Article
- Abstract
- Aqueous rechargeable zinc batteries (ZBs) have many advantages, such as eco-friendliness, low cost, and high-rate performance. However, the Zn dendrite growth on the Zn metal anode of ZBs causes a short-circuit problem between the cathode and anode of the battery, resulting in the degradation of the cell performance. In this study, we employed a Zr-based metal–organic framework (Zr-MOF; UiO-66(Zr)-(COOH)2) with a poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) copolymer binder as a composite protective layer (CPL) to inhibit dendrite formation. The highly stable and porous metal–organic framework (MOF) in the CPL acted as a sieve allowing Znions to be uniformly deposited on the Zn anode. It effectively controlled the Zn dendrite formation during cycling. In addition, compared to a polyvinylidene fluoride (PVDF) homopolymer binder, the PVDF-HFP copolymer binder has a higher ionic conductivity and binding affinity with the Zr-MOF in the CPL, thus reducing the overpotential of the Zn symmetric cell and further improving its cyclability. As a result, the Zn symmetric cell, coated with the CPL composed of Zr-MOF and PVDF-HFP copolymer binder, exhibited stable operation for 2400 cycles at a high current density of 10 mA/cm2 without a short circuit. This result suggests that the combination of MOF materials and copolymer binders to design a CPL is efficient in suppressing Zn dendrites. © 2022
- DOI
- 10.1016/j.electacta.2022.140648
- Appears in Collections:
- 공과대학 > 화공신소재공학과 > Journal papers
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