Modification of separator by glassy metal-organic framework with isotropic and grain-boundary-free characteristics enables reversible lithium plating/stripping in lithium metal batteries
Year: 2026
Type: article
Abstract: Although lithium metal batteries (LMBs) are regarded as the promising next generation high-energy rechargeable storage devices, the issue of lithium dendrites growth of lithium metal anodes (LMAs) significantly impedes the practical application of LMBs. In this study, we propose a glassy MOF, namely gZIF-62, as a highly appealing candidate for the modification of commercial polypropylene (PP) separator. The gZIF-62/PP composite separator can effectively decrease the lithium nucleation overpotential and increase the lithium ion transference number, leading to smooth and dense surface morphology of lithium deposits and reversible lithium plating/stripping behaviors of LMAs. With the employment of gZIF-62/PP separator, the Li|Cu half cell can run stably with a high average coulombic efficiency (CE) of 92.76% during 120 cycles, while the Li|Li symmetric cell could maintain a relatively small and very stable voltage polarization of about 23.73 mV without short-circuit case for a 650 h cycling, at a current density of 0.5 mA cm-2 with a capacity of 0.5 mAh cm-2. Moreover, the Li|LFP full cell with a LFP mass loading of about 2.0 mg cm-2 exhibits an enhanced cycling performance with a capacity retention of 74.42% and an average CE of 99.84% during 1000 cycles at 1 C. In addition, the gZIF-62/PP separator based cell presents better rate capability than the crystalline-ZIF-62(cZIF-62)/PP separator based cell. The boosted electrochemical performance of LMBs with the use of gZIF-62/PP separator can be attributed to the intrinsic characteristics in terms of isotropy and lack of grain boundaries belonging to the gZIF-62 material.
Source: Journal of Alloys and Compounds
Authors: Ying Luo, Xingyu Li, Liying Liu, Xi Ke, Yantong Xu, Zhicong Shi
Institutions: Guangdong University of Technology, Sun Yat-sen University
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,660
OpenAlex ID: W7127048607