TiO<sub>2</sub>纳米片/聚偏氟乙烯-六氟丙烯基聚合物固态电解质电化学性能研究

doi:10.11896/cldb.25070067

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Abstract Polymer-based solid-state electrolytes are often limited by high interfacial resistance between heterogeneous phases and the local aggregation of inorganic fillers, both of which severely suppress ionic conductivity and restrict their practical application in solid-state lithium metal batte-ries. To overcome these obstacles, we propose a facile and economical strategy to synthesize titanium dioxide nanosheets (TO-NS) as functional fillers. These nanosheets effectively alleviate polarization effects within both the bulk and interfacial regions of the electrolyte, while simultaneously providing continuous Li⁺ transport pathways that enhance ionic conductivity. Incorporation of TO-NS into a poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) matrix yielded composite solid-state electrolytes, which were systematically characterized to elucidate the influence and mechanism of the nanosheets on electrochemical behavior. The strong interaction between TO-NS and the PVDF-HFP host polymer was found to facilitate rapid lithium-ion migration, leading to outstanding electrochemical performance. The optimized composite electrolyte achieved an ionic conductivity of 7.75 × 10^-4 S·cm^-1. A Li‖Li symmetric cell assembled with this electrolyte exhibited stable cycling for over 1 300 h at 0.2 mA·cm^-2 without noticeable interfacial degradation. Furthermore, a LiFePO₄‖PVDF-HFP/LiTFSI/1% TO-NS‖Li full cell maintained a high discharge capacity of 140.6 mAh·g^-1 after 200 cycles, with a coulombic efficiency of 99.9% and a capacity retention of 89.2%. These results underscore the potential of TO-NS-modified polymer electrolytes as high-performance candidates for next-generation solid-state lithium batteries.

Key words： solid polymer electrolyte titanium dioxide nanosheet poly(vinylidene fluoride-co-hexafluoropropylene) electrochemical perfor-mance

Published: 25 July 2026 Online: 2026-08-12

CLC number:

O632

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	Articles by authors
	YAN Kai
	SHENG Dawei
	ZHANG Enze
	WANG Yongbin
	LI Shaodong
	DUAN Haisong
	LI Lixin

Cite this article:

YAN Kai,SHENG Dawei,ZHANG Enze, et al. A Study on the Electrochemical Performance of TiO₂ Nanosheet/PVDF-HFP Solid Polymer Electrolytes[J]. Materials Reports, 2026, 40(14): 25070067-8.

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https://www.mater-rep.com/EN/10.11896/cldb.25070067 OR https://www.mater-rep.com/EN/Y2026/V40/I14/25070067

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