Chemically anchored liquid-PEO based block copolymer electrolytes for solid-state lithium-ion batteries

Solid-state electrolytes are being considered the keystone element for the development of safer all-solid-state lithium-ion batteries. While poly(ethylene oxide) (PEO) solid-state polymer electrolytes are known to support a Li super(+) flux, satisfying conductivities are reached only above the melti...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2014, Vol.2 (30), p.11839-11846
Main Authors: Rolland, J, Brassinne, J, Bourgeois, J-P, Poggi, E, Vlad, A, Gohy, J-F
Format: Article
Language:English
Subjects:
Construction
Crystallites
Electrolytes
Ionic conductivity
Lithium
Lithium batteries
Lithium-ion batteries
Rendering
Sustainability
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Summary:Solid-state electrolytes are being considered the keystone element for the development of safer all-solid-state lithium-ion batteries. While poly(ethylene oxide) (PEO) solid-state polymer electrolytes are known to support a Li super(+) flux, satisfying conductivities are reached only above the melting point of the PEO crystallites (>65 degree C) rendering PEO unpractical. Herein, by means of block-copolymer engineering, we design a mechanically clamped liquid-PEO electrolyte that combines the high ionic conductivity of a low molecular mass PEO while retaining the dimensional integrity of a solid material. Attractive ionic conductivities of about 0.01 mS cm super(-1) are attained at room temperature without compromising mechanical properties. The electrolyte shows a wide electrochemical stability window and help in building a stable interface with lithium metal. Competitive performances are attained when integrating the developed materials into operational/functional prototype batteries highlighting the provided potential.
ISSN:2050-7488
2050-7496
DOI:10.1039/c4ta02327g