Titanium lithium silicate, preparation method thereof and use of the same serving as electrode material of lithium battery

A technology of lithium titanosilicate and electrode materials, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of no performance data, etc., and achieve the effect of good cycle charge and discharge, good repeatability, and simple preparation

Inactive Publication Date: 2012-08-01
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Kuznicki et al. synthesized a new type of titanosilicate ETS-14 in their patent, which has lithium ion exchange properties and claims that it can be used as a cathode material for lithium ion batteries, but there is no specific performance data [S.M.Kuznicki, J.S.Curran, X.Yang , ETS-14crystalline titanium silicate molecular sieves, manufacture and use thereof, [P]US Patent 5882624, 1999.]

Method used

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  • Titanium lithium silicate, preparation method thereof and use of the same serving as electrode material of lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Add 1.75 grams of butyl titanate, 6 milliliters of H 2 o 2 , 0.8 grams of NaOH, after stirring for half an hour, add 0.8 grams of tetrabutylammonium bromide and 1.2 grams of silicon dioxide, stir for 2-3 hours, transfer to a polytetrafluoroethylene autoclave for packaging, and heat at 180 ° C After 10 days, it was cooled, filtered, and dried to obtain a white precursor, which was identified as JDF-L1 (also known as AM-1) by X-ray powder diffraction.

[0023] (2) Add 0.5 g of titanosilicate JDF-L1 and 5.0 g of lithium oxalate into a round bottom flask, then add 150 ml of distilled water, heat and stir in an oil bath at 100°C for 24 hours, filter, and add the solid substance to the round bottom flask In the bottom flask, add 5.0 g of lithium oxalate and 150 ml of distilled water, and heat and stir in an oil bath at 100° C. for 24 hours. After repeating this for 2 more times, the product was filtered and dried to obtain the product L1-JDF-L1.

[0024] (3) Grind and ...

Embodiment 2

[0026] (1) Dissolve 27.0 grams of sodium silicate and 14.76 grams of sodium hydroxide in 40 milliliters of water, then add 40.30 grams of titanium trichloride solution (15wt% TiCl 3 Dissolved in 10wt% hydrochloric acid), stirred evenly, transferred to a reaction kettle, crystallized at 230°C for 4 days, cooled, filtered, and dried to obtain a white precursor, which was identified as AM-4 by X-ray powder diffraction.

[0027] (2) Add 0.5 g of titanosilicate AM-4 and 5.0 g of lithium acetate into a round bottom flask, then add 200 ml of distilled water, heat and stir in an oil bath at 100°C for 24 hours, filter, and add the solid matter to the round bottom flask In the bottom flask, add 5.0 g of lithium acetate and 200 ml of distilled water, and heat and stir in an oil bath at 100° C. for 24 hours. After repeating this for 2 more times, it was filtered and dried to obtain the product Li-AM-4.

[0028] (3) Grind and mix the product, graphite, and binder disodium carboxymethylcel...

Embodiment 3

[0030] (1) Dissolving 8.0 grams of citric acid in 100 milliliters of ethylene glycol, then adding 0.672 grams of butyl titanate in ethylene glycol (30 milliliters) solution, stirring for 3 hours, adding 0.822 grams of ethyl orthosilicate, After stirring for 1 hour, a solution of 0.913 g of barium acetate in ethylene glycol (30 mL) was added, and a transparent sol was obtained after stirring for 2 hours. The sol was aged at 150 °C for 2 days to obtain a resinous solid. The resinous solid was placed in a muffle furnace and calcined at 900°C for 12 hours to obtain a white precursor, which was identified as fresnoite by X-ray powder diffraction.

[0031] (2) Add 0.5 g of titanosilicate fresnoite and 5.0 g of lithium acetate into a round bottom flask, then add 200 ml of distilled water, heat and stir in an oil bath at 100°C for 24 hours, filter, and add the solid matter into the round bottom flask 5.0 g of lithium acetate and 200 ml of distilled water were added, and heated and st...

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Abstract

The invention provides titanium lithium silicate serving as an electrode material of a lithium battery. The titanium lithium silicate serving as the electrode material of the lithium battery is manufactured through the exchange of a metal titanium silicate precursor with a two-dimensional layered structure or a three-dimensional framework structure with lithium ions. The titanium lithium silicate can be used for preparing a negative electrode material of the lithium ion battery. The titanium lithium silicate material provided by the invention has a low discharge plateau, high electric capacitance, good cyclic charge-discharge performance, and the like when serving as the negative electrode material of the lithium ion battery. The invention provides a preparation method of the titanium lithium silicate electrode material, and the titanium lithium silicate electrode material provided by the invention is simple to easy to prepare, has high repeatability and is a superior electrode material. The invention discloses the preparation method of the titanium lithium silicate.

Description

Technical field: [0001] The invention belongs to the field of lithium battery electrode materials, and in particular relates to a novel titanium silicate lithium battery electrode material. technical background: [0002] Lithium-ion battery is a rechargeable battery. It mainly relies on lithium ions to move between the positive electrode and the negative electrode during charging and discharging, and completes the charging and discharging of the battery through the process of lithium intercalation-delithiation. As a high-performance secondary green battery, lithium-ion battery has been widely used in various portable electronic products and communication tools. Due to its superior performance, lithium-ion battery has also become a potential power battery, and its research has always attracted people's attention. [0003] The electrodes of lithium-ion batteries generally use materials containing lithium [see: J.-M.Tarascon, M.Armand, Issues and challenges facing rechargeable ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58
CPCY02E60/12Y02E60/10
Inventor 杜红宾胡宇翔刘美玭
Owner NANJING UNIV
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