Journal article

Publication year: 2016

Pages: 8889-8896

Journal: Journal of Materials Chemistry C Materials for optical and electronic devices

Volume number: 4

Issue number: 38

ISSN: 2050-7526

eISSN: 2050-7534

Open access status: Hybrid

DOI Link: https://doi.org/10.1039/c6tc02731h

Publisher: Royal Society of Chemistry

Abstract: 
The synthesis and characterization of cubic mesostructured lithium ferrite (alpha-LiFe5O8) with 20 nm diameter pores and nanocrystalline walls is reported. The material is prepared in the form of thin films by sol-gel dip-coating using a poly(isobutylene)-block-poly(ethylene oxide) amphiphilic diblock copolymer as the porogen. Electron microscopy, X-ray scattering and diffraction, time-of-flight secondary ion mass spectrometry, Raman and X-ray photoelectron spectroscopy all show that alpha-LiFe5O8 can be templated to produce high-quality films that are chemically and phase-pure and thermally stable to over 600 degrees C. Magnetometry measurements indicate ferrimagnetic behavior below 300 K, with the coercivity exhibiting a T-1/2 dependence. This novel mesoporous spinel material - when used as an electrode in secondary battery cells - can reversibly store charge via topotactic Li insertion, which allows for the intriguing possibility of tuning the magnetization at room temperature in a facile and controlled manner. The general approach is simple and should be applicable to a variety of other magnetic materials that are capable of reacting electrochemically with Li to produce reduced phases.

Harvard Citation style: Reitz, C., Suchomski, C., Wang, D., Hahn, H. and Brezesinski, T. (2016) In situ tuning of magnetization via topotactic lithium insertion in ordered mesoporous lithium ferrite thin films, Journal of Materials Chemistry C Materials for optical and electronic devices, 4(38), pp. 8889-8896. https://doi.org/10.1039/c6tc02731h

APA Citation style: Reitz, C., Suchomski, C., Wang, D., Hahn, H., & Brezesinski, T. (2016). In situ tuning of magnetization via topotactic lithium insertion in ordered mesoporous lithium ferrite thin films. Journal of Materials Chemistry C Materials for optical and electronic devices. 4(38), 8889-8896. https://doi.org/10.1039/c6tc02731h