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Published on: November 10, 2014
Natural hematite-derived NiFe2O4 as a separator modification material for improved Li-S battery performance
Lei Zhang1, Jiawen Cui1, Haoxian Zhu1
1Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China. sunli@cugb.edu.cn.
Researchers developed a new separator for lithium-sulfur batteries using nickel iron oxide (NiFe2O4) from natural hematite. This NFO@PP separator effectively suppresses polysulfide shuttling, enhancing battery performance and longevity for cost-effective energy storage.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Polysulfide shuttling is a major limitation in lithium-sulfur (Li-S) battery performance.
- Developing effective strategies to mitigate this issue is crucial for advancing Li-S battery technology.
Purpose of the Study:
- To address the polysulfide shuttling problem in Li-S batteries.
- To develop a cost-effective and high-performance separator using abundant natural materials.
Main Methods:
- Coating natural hematite-derived nickel iron oxide (NiFe2O4) onto a polypropylene (PP) separator, creating NFO@PP.
- Evaluating the electrochemical performance of Li-S cells with the NFO@PP separator.
Main Results:
- The NFO@PP separator effectively blocked polysulfide shuttling, demonstrating strong adsorption and catalytic capabilities.
- The NFO@PP cell achieved a high initial capacity of 1258.1 mA h g⁻¹ at 0.1C and maintained 809.6 mA h g⁻¹ at 2C.
- Remarkable cycling stability was observed, with 612.1 mA h g⁻¹ retained after 1000 cycles at 0.5C.
Conclusions:
- Nickel iron oxide derived from natural hematite is a promising material for enhancing Li-S battery separators.
- The NFO@PP separator offers a viable pathway towards developing more cost-effective and high-performance energy storage devices.
