Lithium hydride

Manufactured by Merck Group

Lithium hydride is a chemical compound with the formula LiH. It is a white, crystalline solid that is a common source of hydride for chemical reactions. Lithium hydride is used as a reducing agent, desiccant, and in the synthesis of other lithium compounds.

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Lab products found in correlation

Lithium nitride, by Merck Group (1 mentions) Hand press, by PIKE Technologies (1 mentions) Xylene, by Carl Roth (1 mentions) Lithium aluminium hydride, by Merck Group (1 mentions) Diethyl carbonate, by Merck Group (1 mentions) 2 propanol, by Avantor (1 mentions) Methanol, by Merck Group (1 mentions) Potassium hydroxide, by Merck Group (1 mentions) Toluene, by Merck Group (1 mentions) Ethanol, by Carl Roth (1 mentions) Tetrahydrofuran, by Carl Roth (1 mentions)

Spelling variants of this product

Lithium aluminum hydride (13 citations) Lithium aluminium hydride (6 citations) Lithium aluminum hydride solution (3 citations) Lithium aluminum hydride (LiAlH4) (2 citations)

4 protocols using lithium hydride

Synthesis and Characterization of Li-Si Alloys

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Example 1

Lithium hydride (nominally 95% purity, 30 mesh powder from Sigma Aldrich) and silicon particles (nominally 5 μm particle size from Elkem) were mixed together for 5 minutes in a Spex 8000D mixer mill in a 4:1 molar ratio to form Mixture A. A typical x-ray diffraction (XRD) scan of Mixture A using copper k-alpha radiation is shown in FIG. 2. In FIG. 2, x-axis (210) is 2 theta (θ) (degrees), while intensity (arbitrary units (a.u.)) is shown on the y-axis (220). Mixture A was compressed into a pellet using a using a laboratory press and a steel pressing die set. The pressed pellet was heated to 560° C. in a muffle furnace for 60 minutes. Upon cooling to room temperature, the pellet was lightly ground to form Powder A using an agate mortar and pestle. The process resulted in a mixture of Li₁₃Si₄and Li₂₁Si₅. A typical XRD scan of Powder A using copper k-alpha radiation is shown in FIG. 3. In FIG. 3, x-axis (310) is 2 theta (θ) (degrees), while intensity (arbitrary units (a.u.)) is shown on the y-axis (320).

US10892481B2. Methods of pre-lithiating electroactive material and electrodes including pre-lithiated electroactive material (2021-01-12). GM GLOBAL TECHNOLOGY OPERATIONS LLC [US]. Inventors: Michael P. Balogh [US], Ion C. Halalay [US].

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Synthesis of Li12Si7 Composite Powder

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Example 2

Lithium hydride (nominally 95% purity, 30 mesh powder from Sigma Aldrich) and silicon particles (nominally 5 μm particle size from Elkem) were mixed together for 5 minutes in a Spex 8000D mixer mill in a 3:2 molar ratio to form Mixture B. Mixture B was compressed into a pellet using a using a laboratory press and a steel pressing die set. The pressed pellet was heated to 560° C. in a muffle furnace for 60 minutes. Upon cooling to room temperature, the pellet was lightly ground to form Powder B using an agate mortar and pestle. The process resulted in a mixture of Li₁₂Si₇and Si. A typical XRD scan of Powder B using copper k-alpha radiation is shown in FIG. 4. In FIG. 4, x-axis (410) is 2 theta (θ) (degrees), while intensity (arbitrary units (a.u.)) is shown on the y-axis (420).

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Synthesis of Li₂+ₓNH Compounds

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13 samples of Li_2+xNH (where x = 0, 0.167, 0.333, 0.500, 0.667, 0.833, 1.000, 1.167, 1.333, 1.500, 1.667, 1.833, 2.000) were synthesised by the solid state reaction of lithium imide with Lithium nitride–hydride according to the following reaction:
Lithium imide for the reaction was synthesised as for the Li_1+xNH_2−x samples (x = 1.000). Lithium nitride–hydride was synthesised by the reaction of lithium hydride (Sigma Aldrich, 95%) and Lithium nitride (Sigma Aldrich, >99.5%): The reactants were hand-ground and then milled according to the procedure outlined above. 0.5 g of the resultant mixture was pelletised using a hand press (Pike Technologies, 7 mm diameter), and placed into a nickel crucible in a quartz boiling tube, sealed with a Young's tap T-piece. The sample was heated to 500 °C at 2 °C min⁻¹ and dwelled for 12 hours.
Synthesis of the mixed Li_2+xNH samples from lithium imide and Lithium nitride–hydride was the same as for the other samples, except that the milling procedure used a rotation rate of 400 rpm, and the furnace temperature set point was 540 °C.

Makepeace J.W., Brittain J.M., Sukhwani Manghnani A., Murray C.A., Wood T.J, & David W.I. (2021). Compositional flexibility in Li–N–H materials: implications for ammonia catalysis and hydrogen storage. Physical Chemistry Chemical Physics, 23(28), 15091-15100.

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Synthesis of 1,18-Octadecanedioic Acid

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All chemicals were used as received without further purification. 1,18-octadecanedioic acid was purchased from Elevance Renewable Sciences Inc. Titanium(IV) n-butoxide (97 %), lithium aluminium hydride (95 %), lithium hydride (95 %), diethyl carbonate (≥ 99 %), potassium hydroxide (≥ 99 %) and m Ethanol (≥ 99.8 %) were purchased from Sigma Aldrich. Ethanol (≥ 99.8 %), xylene (isomeric mixture, ≥ 99 %) and tetrahydrofuran (≥ 99.5 %) were purchased from Carl Roth. 2-Propanol (≥ 99.7 %) was purchased from VWR and toluene (≥ 99.9 %) was purchased from Merck. N,O-Bis(trimethylsilyl)trifluoroacetamide (BSTFA) (98%) was purchased from abcr.

Häußler M., Eck M., Rothauer D, & Mecking S. (2021). Closed-loop recycling of polyethylene-like materials. Nature, 590(7846).

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