Engineered interfaces in hybrid ceramic-polymer electrolytes for use in all-solid-state li batteries

Parameswara Rao Chinnam; Stephanie L. Wunder

doi:10.1021/acsenergylett.6b00609

Engineered interfaces in hybrid ceramic-polymer electrolytes for use in all-solid-state li batteries

Parameswara Rao Chinnam
, Stephanie L. Wunder

Research output: Contribution to journal › Article › peer-review

82 Scopus citations

Abstract

Composites of inorganic lithium ion conducting glass ceramics (LICGCs) and organic polymers may provide the best combination of properties for safe solid separators in lithium or lithium ion batteries to replace the currently used volatile liquid electrolytes. A key problem for their use is the high interfacial resistance that develops between the two, increasing the total cell impedance. Here we show that the application of a thin conformal SiO₂ coating onto a LICGC followed by silanization with (CH₃CH₂O)₃-Si-(OCH₂CH₂)-OCH₃ in the presence of LiTFSI results in good adhesion between the SiO₂ and the LICGC, a low resistance interface, and good wetting of Li⁰. Further, the crosslinked polymer formed on the surface of the silanated SiO₂ interface formed from excess (CH₃CH₂O)₃-Si-(OCH₂CH₂)-OCH₃ prevents corrosion of the LICGC by Li⁰ metal. The use of SiO₂ as a "glue" enables compatibilization of inorganic ceramics with other polymers and introduction of interfacial pendant anions.

Original language	English
Pages (from-to)	134-138
Number of pages	5
Journal	ACS Energy Letters
Volume	2
Issue number	1
DOIs	https://doi.org/10.1021/acsenergylett.6b00609
State	Published - Jan 13 2017
Externally published	Yes

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title = "Engineered interfaces in hybrid ceramic-polymer electrolytes for use in all-solid-state li batteries",

abstract = "Composites of inorganic lithium ion conducting glass ceramics (LICGCs) and organic polymers may provide the best combination of properties for safe solid separators in lithium or lithium ion batteries to replace the currently used volatile liquid electrolytes. A key problem for their use is the high interfacial resistance that develops between the two, increasing the total cell impedance. Here we show that the application of a thin conformal SiO2 coating onto a LICGC followed by silanization with (CH3CH2O)3-Si-(OCH2CH2)-OCH3 in the presence of LiTFSI results in good adhesion between the SiO2 and the LICGC, a low resistance interface, and good wetting of Li0. Further, the crosslinked polymer formed on the surface of the silanated SiO2 interface formed from excess (CH3CH2O)3-Si-(OCH2CH2)-OCH3 prevents corrosion of the LICGC by Li0 metal. The use of SiO2 as a {"}glue{"} enables compatibilization of inorganic ceramics with other polymers and introduction of interfacial pendant anions.",

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AU - Chinnam, Parameswara Rao

AU - Wunder, Stephanie L.

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N2 - Composites of inorganic lithium ion conducting glass ceramics (LICGCs) and organic polymers may provide the best combination of properties for safe solid separators in lithium or lithium ion batteries to replace the currently used volatile liquid electrolytes. A key problem for their use is the high interfacial resistance that develops between the two, increasing the total cell impedance. Here we show that the application of a thin conformal SiO2 coating onto a LICGC followed by silanization with (CH3CH2O)3-Si-(OCH2CH2)-OCH3 in the presence of LiTFSI results in good adhesion between the SiO2 and the LICGC, a low resistance interface, and good wetting of Li0. Further, the crosslinked polymer formed on the surface of the silanated SiO2 interface formed from excess (CH3CH2O)3-Si-(OCH2CH2)-OCH3 prevents corrosion of the LICGC by Li0 metal. The use of SiO2 as a "glue" enables compatibilization of inorganic ceramics with other polymers and introduction of interfacial pendant anions.

AB - Composites of inorganic lithium ion conducting glass ceramics (LICGCs) and organic polymers may provide the best combination of properties for safe solid separators in lithium or lithium ion batteries to replace the currently used volatile liquid electrolytes. A key problem for their use is the high interfacial resistance that develops between the two, increasing the total cell impedance. Here we show that the application of a thin conformal SiO2 coating onto a LICGC followed by silanization with (CH3CH2O)3-Si-(OCH2CH2)-OCH3 in the presence of LiTFSI results in good adhesion between the SiO2 and the LICGC, a low resistance interface, and good wetting of Li0. Further, the crosslinked polymer formed on the surface of the silanated SiO2 interface formed from excess (CH3CH2O)3-Si-(OCH2CH2)-OCH3 prevents corrosion of the LICGC by Li0 metal. The use of SiO2 as a "glue" enables compatibilization of inorganic ceramics with other polymers and introduction of interfacial pendant anions.

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Engineered interfaces in hybrid ceramic-polymer electrolytes for use in all-solid-state li batteries

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