Thin film lithium batteries

Souquet, J.L.; Duclot, M.

doi:10.1016/s0167-2738(02)00076-0

Cited by 131 publications

(74 citation statements)

References 8 publications

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“…This is due to the high fractions (50%) of GeS 2 glass former in Li 2 GeS 3 . The Raman spectrum of the Li 4 GeS 4 thin film also shows three peaks at 340, 375, and 415 cm -1 , like the spectrum of the Li 2 GeS 3 thin film, and another broader peak of lower intensity at 460 cm -1 . The intensities of the peaks at 375 and 415 cm -1 are higher than those in the spectrum of the Li 2 GeS 3 thin film.…”

Section: Surface Morphology and Thickness Of The Thin Filmmentioning

confidence: 81%

Structural Properties of Lithium Thio-Germanate Thin Film Electrolytes Grown by Radio Frequency Sputtering

Seo

Martin

2011

Inorg. Chem.

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In this study, lithium thio-germanate thin film electrolytes have been successfully prepared by radio frequency (RF) magnetron sputtering deposition in Ar gas atmospheres. The targets for RF sputtering were prepared by milling and pressing appropriate amounts of the melt-quenched starting materials in the nLi2S + GeS2 (n = 1, 2, and 3) binary system. Approximately 1 μm thin films were grown on Ni coated Si (Ni/Si) substrates and pressed CsI pellets using 50 W power and 25 mtorr (3.3 Pa) Ar gas pressures to prepare samples for Raman and Infrared (IR) spectroscopy, respectively. To improve the adhesion between the silicon substrate and the thin film electrolyte, a sputtered Ni layer (120 nm) was used. The surface morphologies and thickness of the thin films were determined by field emission scanning electron microscopy (FE-SEM). The structural properties of the starting materials, target materials, and the grown thin films were examined by X-ray diffraction (XRD), Raman, and IR spectroscopy. Disciplines Materials Science and Engineering | Physical Chemistry CommentsReprinted with permission from Inorganic Chemistry 50 (2011) ABSTRACT: In this study, lithium thio-germanate thin film electrolytes have been successfully prepared by radio frequency (RF) magnetron sputtering deposition in Ar gas atmospheres. The targets for RF sputtering were prepared by milling and pressing appropriate amounts of the meltquenched starting materials in the nLi 2 S þ GeS 2 (n = 1, 2, and 3) binary system. Approximately 1 μm thin films were grown on Ni coated Si (Ni/Si) substrates and pressed CsI pellets using 50 W power and 25 mtorr (∼3.3 Pa) Ar gas pressures to prepare samples for Raman and Infrared (IR) spectroscopy, respectively. To improve the adhesion between the silicon substrate and the thin film electrolyte, a sputtered Ni layer (∼120 nm) was used. The surface morphologies and thickness of the thin films were determined by field emission scanning electron microscopy (FE-SEM). The structural properties of the starting materials, target materials, and the grown thin films were examined by X-ray diffraction (XRD), Raman, and IR spectroscopy.

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Section: Surface Morphology and Thickness Of The Thin Filmmentioning

confidence: 81%

Structural Properties of Lithium Thio-Germanate Thin Film Electrolytes Grown by Radio Frequency Sputtering

Seo

Martin

2011

Inorg. Chem.

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“…The most important reasons for selecting RFMS as the technique of choice are given here (Dudney et al, 1999;Souquet and Duclot, 2002). First, there is no need in the project to produce thick films.…”

Section: Radio Frequency (Rf) Sputteringmentioning

confidence: 99%

“…These types of batteries are of interest for applications such as non-volatile computer memory chips, smart cards, integrated circuits, and some medical applications (Albano et al, 2008;Souquet and Duclot, 2002). In a d d i t i o n , a s t h e i n c r e a s i n g t e n d e n c y o f m a n y a d v a n c e d t e c h n o l o g i e s i s t o w a r d s miniaturization, the future development of batteries is aiming at smaller dimensions with higher power densities.…”

Section: Introductionmentioning

confidence: 99%

“…In a d d i t i o n , a s t h e i n c r e a s i n g t e n d e n c y o f m a n y a d v a n c e d t e c h n o l o g i e s i s t o w a r d s miniaturization, the future development of batteries is aiming at smaller dimensions with higher power densities. The development of new technologies and miniaturization in the microelectronics industry has reduced the power and current requirements of small power electronic devices such as smart cards and other CMOS circuit applications (Albano et al, 2008;Souquet and Duclot, 2002). Therefore, developing improved solid-state thinfilm batteries will allow better compatibility with microelectronic processing and components.…”

Section: Introductionmentioning

confidence: 99%

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New Developments in Solid Electrolytes for Thin-Film Lithium Batteries

Seo¹,

Martin²

2012

Lithium Ion Batteries - New Developments

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“…These types of batteries are of interest for applications such as nonvolatile computer memory chips, smart cards, integrated circuits, and some medical applications. 2,3 Therefore, developing improved solid-state thin-film batteries will allow better compatibility with microelectronic processing and components. Until now LiCoO 2 or LiMn 2 O 4 cathode materials and graphite anodes are used commercially.…”

mentioning

confidence: 99%

Preparation and Characterization of Fast Ion Conducting Lithium Thio-Germanate Thin Films Grown by RF Magnetron Sputtering

Seo

Martin

2011

J. Electrochem. Soc.

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In this study, amorphous lithium thio-germanate thin films were prepared by radio frequency (RF) sputtering deposition in Ar atmospheres. For the first time, new high quality lithium germanium sulfide nLi 2 S þ GeS 2 thin films, n ¼ 1, 2, and 3, have been successfully made by RF sputtering and synthesized as new solid state electrolytes. Although these materials are unstable in air, the starting materials, target materials, and thin films made from them were thoroughly characterized by x-ray diffraction (XRD), Raman spectroscopy, SEM, x-ray photoelectron spectroscopy (XPS), and impedance spectroscopy using special setups to prevent contamination. These high quality thin films did not show any cracks and pits on the surface and the ionic conductivities of the thin films are 2-3 orders of magnitude higher than reported values for similar lithium containing oxide thin films. In this way, this work may provide a new way for developing new thin-film electrolytes for solid state lithium ion batteries.

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Thin film lithium batteries

Cited by 131 publications

References 8 publications

Structural Properties of Lithium Thio-Germanate Thin Film Electrolytes Grown by Radio Frequency Sputtering

Structural Properties of Lithium Thio-Germanate Thin Film Electrolytes Grown by Radio Frequency Sputtering

New Developments in Solid Electrolytes for Thin-Film Lithium Batteries

Preparation and Characterization of Fast Ion Conducting Lithium Thio-Germanate Thin Films Grown by RF Magnetron Sputtering

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