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920398

Sigma-Aldrich

Lithium bis(trimethylsilyl)amide

99.9% trace metals basis

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Synonym(s):
LHMDS, LiHMDS, LiTMSA, Lithium hexamethyldisilazide, Hexamethyldisilazane lithium salt
Linear Formula:
[(CH3)3Si]2NLi
CAS Number:
4039-32-1
Molecular Weight:
167.33
MDL number:
MFCD00008261
UNSPSC Code:
12352111

Quality Level

200

Assay

99.9% trace metals basis

form

solid

density

0.860 g/mL at 25 °C (lit.)

application(s)

battery manufacturing

SMILES string

[Li]N([Si](C)(C)C)[Si](C)(C)C

InChI

1S/C6H18NSi2.Li/c1-8(2,3)7-9(4,5)6;/h1-6H3;/q-1;+1

InChI key

YNESATAKKCNGOF-UHFFFAOYSA-N

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General description

Lithium bis(trimethylsilyl)amide also known as lithium hexamethyldisilazide (LiHMDS) is a non-nucleophilic strong base. It exhibits ionic conductivity and is widely used as a lithium source and additive in electrolyte formulations for lithium-ion batteries.

Application

Lithium bis(trimethylsilyl)amide can be used:


  • As an electrolyte additive for non-aqueous lithium metal batteries. LiHMDS acts as a scavenger for hydrofluoric acid and forms an electrochemical robust cathode|electrolyte interphase (CEI) and suppresses the side reactions with the electrolyte solution.
  • As a lithium precursor for atomic layer deposition(ALD) of textured Li4Ti5O12 as anode material for Li-ion ultrafast charging thin-film batteries. It enables the controlled delivery of lithium atoms into the deposition process, leading to the growth of thin films with precise thickness and composition.
  • As a precursor to fabricate in situ lithiated quinone cathode as high-capacity organic electrode material for all-solid-state thin-film battery setup.

Pictograms

FlameCorrosion
GHS02,GHS05

Signal Word

Danger

Hazard Statements

H228,H251,H314

Hazard Classifications

Eye Dam. 1 - Flam. Sol. 1 - Self-heat. 1 - Skin Corr. 1B

Supplementary Hazards

EUH014

WGK

WGK 2

Flash Point(F)

62.6 °F

Flash Point(C)

17 °C

Certificates of Analysis (COA)

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Lithium Phosphate Thin Films Grown by Atomic Layer Deposition.
Hamalainen J, et al.
Journal of the Electrochemical Society, 159(3), A259-A259 (2012)
Atomic layer deposition of textured Li4Ti5O12: a high-power and long-cycle life anode for lithium-ion thin-film batteries
Jan Speulmanns, et al
Small, 17, 2102635-2102635 (2021)
Lithium hexamethyldisilazide as electrolyte additive for efficient cycling of high-voltage non-aqueous lithium metal batteries
Danfeng Zhang, et al.
Nature Communications, 13, 6966-6966 (2022)
Olesya Yarema et al.
Chemistry of materials : a publication of the American Chemical Society, 25(18), 3753-3757 (2014-04-22)
We report a simple, high-yield colloidal synthesis of copper indium selenide nanocrystals (CISe NCs) based on a silylamide-promoted approach. The silylamide anions increase the nucleation rate, which results in small-sized NCs exhibiting high luminescence and constant NC stoichiometry and crystal
Maksym Yarema et al.
ACS nano, 5(5), 3758-3765 (2011-04-20)
Here, we present a hot injection synthesis of colloidal Ag chalcogenide nanocrystals (Ag(2)Se, Ag(2)Te, and Ag(2)S) that resulted in exceptionally small nanocrystal sizes in the range between 2 and 4 nm. Ag chalcogenide nanocrystals exhibit band gap energies within the
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