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Electro-synthesis of the Precursor of Nano-sized Li_4Ti_5O_( 12) and Its Sol-gel

Zhu Chuan-gao

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Abstract

0.120 g Li slice was put into an ethanol and acetyl-acetone solution and the precursor Li_4Ti_5(OEt)_ 24-n(acac)_n of the nano-oxide powder Li_4Ti_5O_ 12 was prepared by electrochemical dissolution of titanium for 6 h with a current of 0.2 A. The product was characterized by FT IR, XRD and TEM. Experimental results showed temperature between 35～40 ℃ and adding 0.040～0.045 mol/L Bu_4NBr as conductive additive can enhance the current efficiency to 90%. The precursor of 0.2 mol/L was hydrolyzed at 40 ℃ and pH=8.5, and the yield was 89%. The xerogel powder made from the precursor has a narrow size distribution of 10～15 nm.

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What this paper is about

0.120 g Li slice was put into an ethanol and acetyl-acetone solution and the precursor Li_4Ti_5(OEt)_ 24-n(acac)_n of the nano-oxide powder Li_4Ti_5O_ 12 was prepared by electrochemical dissolution of titanium for 6 h with a current of 0.2 A. The product was characterized by FT IR, XRD and TEM. Experimental results showed temperature between 35～40 ℃ and adding 0.040～0.045 mol/L Bu_4NBr as conductive additive can enhance the current efficiency to 90%. The precursor of 0.2 mol/L was hydrolyzed at 40 ℃ and pH=8.5, and the yield was 89%. The xerogel powder made from the precursor has a narrow size distribution of 10～15 nm.

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Available abstract

0.120 g Li slice was put into an ethanol and acetyl-acetone solution and the precursor Li_4Ti_5(OEt)_ 24-n(acac)_n of the nano-oxide powder Li_4Ti_5O_ 12 was prepared by electrochemical dissolution of titanium for 6 h with a current of 0.2 A. The product was characterized by FT IR, XRD and TEM. Experimental results showed temperature between 35～40 ℃ and adding 0.040～0.045 mol/L Bu_4NBr as conductive additive can enhance the current efficiency to 90%. The precursor of 0.2 mol/L was hydrolyzed at 40 ℃ and pH=8.5, and the yield was 89%. The xerogel powder made from the precursor has a narrow size distribution of 10～15 nm.

Key concepts: Acetone, Hydrolysis, Yield (engineering), Nano-, Dissolution, Electrochemistry, Nuclear chemistry, Chemistry

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Electro-synthesis of the Precursor of Nano-sized Li_4Ti_5O_( 12) and Its Sol-gel — Research Paper | ScholarLens