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Updated: Sep 13, 2025

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
Multishelled Hollow Spherical High Entropy Oxide as a Separator Modification Layer toward Stable Lithium-Metal
1Key Laboratory of Automobile Materials, Ministry of Education, and School of Materials Science and Engineering, Jilin University, Changchun 130022, China.
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Lithium-metal batteries (LMBs) have received widespread publicity because of their preeminent energy density. However, lithium-metal anodes (LMAs) face abysmal problems including dendrite growth and violent interfacial side reactions, which sorely hinder further progress of LMBs. Here, a well-designed (CoZnNiMnFe)3O4 high entropy oxide with a multishelled hollow spherical shape (HHEO) is first developed as a functionalized layer to modify a commercial polypropylene (PP) separator (named as HHEO-PP). Based on high ionic conductivity and excellent electrolyte wettability, the HHEO-PP separator achieves fast Li+ diffusion and homogenized Li+ flux. Therefore, half cells and symmetric cells based on HHEO-PP obtain high Coulombic efficiency (CE) and long lifespan. Li||LiFePO4 (Li||LFP) full cell including HHEO-PP stably circulates 1000 cycles with a CE of 99% at 2 C. These findings strongly testify the sterling performance of HHEO-PP and expand the path for high entropy oxide functionalized separators for other alkali metal batteries.
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