Fast ion conductor modified double-polymer (PVDF and PEO) matrix electrolyte for solid lithium-ion batteries

Title data

Yi, Shuhong ; Xu, Tinghua ; Li, Li ; Gao, Mengmeng ; Du, Kai ; Zhao, Huiling ; Bai, Ying:
Fast ion conductor modified double-polymer (PVDF and PEO) matrix electrolyte for solid lithium-ion batteries.
In: Solid State Ionics. Vol. 355 (2020) . - 115419.
ISSN 0167-2738
DOI: https://doi.org/10.1016/j.ssi.2020.115419

Official URL:

Abstract in another language

Organic-inorganic composite solid state electrolytes (SSEs), as one of the most attractive candidates for next generation SSEs, combines the both advantages of flexibility (from organic polymer) and structure rigidity (from robust inorganic constituent). In this work, a high performance three-dimensional (3D) crosslinked electrolyte with polymer poly(vinylidene fluoride) (PVDF) and polyethylene oxide (PEO) matrices is further modified by dispersing submicron fast ion conductor Li1.4Al0.4Ti1.6(PO4)3 (LATP). The optimal 3D composite SSE PVDF@10PEO-5LATP-5LiPF6 (PPLL) shows high ionic conductivities of 5.24 × 10−4 S cm−1 at 25 °C and above 10−3 S cm−1 at 50 °C. Galvanostatic cycling test demonstrates that PPLL contributes to electrochemical performances, with high capacity retention of 93.95 after 500 cycles for LiFePO4 cathode. Further investigations indicate its more benefits including excellent flexibility and superior safety. Intensive explorations imply that the interaction between dual-matrix degrades the respective crystallization through generating weak bonding, and the recombination with LATP further enhances ionic conductivity as well as structural stability of composite electrolyte via strengthening interface reaction, and reducing the organic crystallinity. This composite SSE with high conductivity and stability may be applied in next generation energy storage devices, particularly in all-solid-state secondary batteries.

Further data

Item Type:	Article in a journal
Refereed:	Yes
Keywords:	Composite solid state electrolytes (SSEs); Dual-matrix; Fast ion conductor LiAlTi(PO)(LATP); Ionic conductivity; All-solid-state batteries
Institutions of the University:	Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry Research Institutions > Central research institutes > Bayerisches Zentrum für Batterietechnik - BayBatt
Result of work at the UBT:	No
DDC Subjects:	500 Science > 500 Natural sciences 500 Science > 540 Chemistry 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited:	27 Nov 2023 11:46
Last Modified:	27 Nov 2023 11:46
URI:	https://eref.uni-bayreuth.de/id/eprint/87868