Toluene-Mediated Morphology Tuning of Diblock Copolymer-Templated Porous Si/Ge/K/C Thin Films for Li-Ion Batteries

Christian L. Weindl; Kexin Wu; Christian E. Fajman; Zhuijun Xu; Tianle Zheng; Ting Tian; Constantin Harder; Benedikt Sochor; Stephan V. Roth; Thomas F. Fässler; Peter Müller-Buschbaum

doi:10.1002/aesr.202300096

Toluene-Mediated Morphology Tuning of Diblock Copolymer-Templated Porous Si/Ge/K/C Thin Films for Li-Ion Batteries

Christian L. Weindl, Kexin Wu, Christian E. Fajman, Zhuijun Xu, Tianle Zheng, Ting Tian, Constantin Harder, Benedikt Sochor, Stephan V. Roth, Thomas F. Fässler, Peter Müller-Buschbaum

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

3 Scopus citations

Abstract

Amphiphilic diblock copolymer poly(styrene-b-ethylene oxide) templating in combination with sol–gel chemistry is utilized to synthesize porous mixed silicon/germanium/potassium/carbon (Si/Ge/K/C) thin films. As a Si/Ge source, the dissolvable Zintl phase K₁₂Si₁₂Ge₅ is used. The toluene-mediated morphological changes in the porous mixed Si/Ge/K/C thin films are studied with scanning electron microscopy and grazing incidence small/wide-angle X-Ray scattering. A dichloromethane solvent vapor annealing step is applied to study the additional morphological transformation inside the films. Since Ge and Si are promising anode materials in Li-ion batteries, CR2032 half-cells are manufactured with the porous mixed Si/Ge/K/C thin films and characterized by cyclic voltammograms, cycling, and impedance spectroscopy.

Original language	English
Article number	2300096
Journal	Advanced Energy and Sustainability Research
Volume	4
Issue number	10
DOIs	https://doi.org/10.1002/aesr.202300096
State	Published - Oct 2023

Keywords

Li-ion batteries
Si/Ge/K/C
diblock copolymers
porous films
solvent vapor annealing

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10.1002/aesr.202300096

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Weindl, C. L., Wu, K., Fajman, C. E., Xu, Z., Zheng, T., Tian, T., Harder, C., Sochor, B., Roth, S. V., Fässler, T. F., & Müller-Buschbaum, P. (2023). Toluene-Mediated Morphology Tuning of Diblock Copolymer-Templated Porous Si/Ge/K/C Thin Films for Li-Ion Batteries. Advanced Energy and Sustainability Research, 4(10), Article 2300096. https://doi.org/10.1002/aesr.202300096

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title = "Toluene-Mediated Morphology Tuning of Diblock Copolymer-Templated Porous Si/Ge/K/C Thin Films for Li-Ion Batteries",

abstract = "Amphiphilic diblock copolymer poly(styrene-b-ethylene oxide) templating in combination with sol–gel chemistry is utilized to synthesize porous mixed silicon/germanium/potassium/carbon (Si/Ge/K/C) thin films. As a Si/Ge source, the dissolvable Zintl phase K12Si12Ge5 is used. The toluene-mediated morphological changes in the porous mixed Si/Ge/K/C thin films are studied with scanning electron microscopy and grazing incidence small/wide-angle X-Ray scattering. A dichloromethane solvent vapor annealing step is applied to study the additional morphological transformation inside the films. Since Ge and Si are promising anode materials in Li-ion batteries, CR2032 half-cells are manufactured with the porous mixed Si/Ge/K/C thin films and characterized by cyclic voltammograms, cycling, and impedance spectroscopy.",

keywords = "Li-ion batteries, Si/Ge/K/C, diblock copolymers, porous films, solvent vapor annealing",

author = "Weindl, {Christian L.} and Kexin Wu and Fajman, {Christian E.} and Zhuijun Xu and Tianle Zheng and Ting Tian and Constantin Harder and Benedikt Sochor and Roth, {Stephan V.} and F{\"a}ssler, {Thomas F.} and Peter M{\"u}ller-Buschbaum",

note = "Publisher Copyright: {\textcopyright} 2023 The Authors. Advanced Energy and Sustainability Research published by Wiley-VCH GmbH.",

year = "2023",

month = oct,

doi = "10.1002/aesr.202300096",

language = "English",

volume = "4",

journal = "Advanced Energy and Sustainability Research",

issn = "2699-9412",

publisher = "Wiley-VCH Verlag",

number = "10",

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T1 - Toluene-Mediated Morphology Tuning of Diblock Copolymer-Templated Porous Si/Ge/K/C Thin Films for Li-Ion Batteries

AU - Weindl, Christian L.

AU - Wu, Kexin

AU - Fajman, Christian E.

AU - Xu, Zhuijun

AU - Zheng, Tianle

AU - Tian, Ting

AU - Harder, Constantin

AU - Sochor, Benedikt

AU - Roth, Stephan V.

AU - Fässler, Thomas F.

AU - Müller-Buschbaum, Peter

PY - 2023/10

Y1 - 2023/10

N2 - Amphiphilic diblock copolymer poly(styrene-b-ethylene oxide) templating in combination with sol–gel chemistry is utilized to synthesize porous mixed silicon/germanium/potassium/carbon (Si/Ge/K/C) thin films. As a Si/Ge source, the dissolvable Zintl phase K12Si12Ge5 is used. The toluene-mediated morphological changes in the porous mixed Si/Ge/K/C thin films are studied with scanning electron microscopy and grazing incidence small/wide-angle X-Ray scattering. A dichloromethane solvent vapor annealing step is applied to study the additional morphological transformation inside the films. Since Ge and Si are promising anode materials in Li-ion batteries, CR2032 half-cells are manufactured with the porous mixed Si/Ge/K/C thin films and characterized by cyclic voltammograms, cycling, and impedance spectroscopy.

AB - Amphiphilic diblock copolymer poly(styrene-b-ethylene oxide) templating in combination with sol–gel chemistry is utilized to synthesize porous mixed silicon/germanium/potassium/carbon (Si/Ge/K/C) thin films. As a Si/Ge source, the dissolvable Zintl phase K12Si12Ge5 is used. The toluene-mediated morphological changes in the porous mixed Si/Ge/K/C thin films are studied with scanning electron microscopy and grazing incidence small/wide-angle X-Ray scattering. A dichloromethane solvent vapor annealing step is applied to study the additional morphological transformation inside the films. Since Ge and Si are promising anode materials in Li-ion batteries, CR2032 half-cells are manufactured with the porous mixed Si/Ge/K/C thin films and characterized by cyclic voltammograms, cycling, and impedance spectroscopy.

KW - Li-ion batteries

KW - Si/Ge/K/C

KW - diblock copolymers

KW - porous films

KW - solvent vapor annealing

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U2 - 10.1002/aesr.202300096

DO - 10.1002/aesr.202300096

M3 - Article

AN - SCOPUS:85169308778

SN - 2699-9412

VL - 4

JO - Advanced Energy and Sustainability Research

JF - Advanced Energy and Sustainability Research

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M1 - 2300096

ER -

Toluene-Mediated Morphology Tuning of Diblock Copolymer-Templated Porous Si/Ge/K/C Thin Films for Li-Ion Batteries

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