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Titanic oxide negative electrode material used as sodium-ion battery and preparation method of thereof

A sodium-ion battery and negative electrode material technology, which is applied in the field of energy storage materials and chemical power sources, can solve the problems of specific capacity and cycle stability to be improved, and achieve the effect of abundant raw materials, spacious ion transmission channels, and good electrochemical performance

Inactive Publication Date: 2014-10-08
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such as Na 2 Ti 3 o 7 (P.Senguttuvan.G.Rousse, V.Seznec, J.M.Taraascon, M.R.Palacin, Chem.Mater.23(2011)4109.) and NaTi 2 (PO 4 ) 3 (P.Senguttuvan.G.Rousse, M.E.Arroyo y de Dompablo, H.Vezin, J.M.Taraascon, M.R.Palacin, J.Am.Chem.Soc.135(2013) 3897.) compound, its specific capacity and cycle stability are needs improvement

Method used

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  • Titanic oxide negative electrode material used as sodium-ion battery and preparation method of thereof
  • Titanic oxide negative electrode material used as sodium-ion battery and preparation method of thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Mix 20ml of ethanol with 5ml of concentrated hydrochloric acid, and then add 0.002mol of NbCl 5 0.02 mol of tetrabutyl titanate was added under stirring, and then the solution was heated and dried under stirring. The dried product was heated up to 500° C. at a heating rate of 3° C. / min in an air atmosphere, and kept at a temperature of 5 hours to obtain the product niobium-doped titanium oxide.

Embodiment 2

[0023] Mix 30ml of ethylene glycol with 1ml of concentrated hydrochloric acid, and then add 0.004mol of NbCl 5 0.02 mol of tetrabutyl titanate was added under stirring, and then the solution was heated and dried under stirring. The dried product was heated up to 700° C. at a rate of 10° C. / min in an oxygen atmosphere, and kept at a temperature of 3 hours to obtain a product niobium-doped titanium oxide.

Embodiment 3

[0025] Mix 15ml of cyclohexane with 2ml of concentrated hydrochloric acid, and then add 0.0001mol of InCl 3 0.02 mol of tetrabutyl titanate was added under stirring, and then the solution was heated and dried under stirring. The dried product was heated to 400° C. at a heating rate of 2° C. / min under an argon atmosphere, and kept for 10 hours to obtain the product indium-doped titanium oxide.

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Abstract

The invention relates to a titanic oxide negative electrode material used as a sodium-ion battery and a preparation method of the material. According to the titanic oxide negative electrode material, part of titanium is replaced by using doped ions, so that an ion transmission channel is expanded. The negative electrode material contains MxTi<1-x>Oy, wherein x is greater than 0 and less than 0.25, y is greater than 1.5 and less than 2.25, and M is selected from one or several out of Mn, Fe, Co, Ni, Cu, Zn, Mo, Nb, In, Sn, Bi, B or Zr. Compared with the prior art, the doped titanic oxide negative electrode material prepared by the method provided by the invention is good in electro-chemical properties such as relatively good circulation property, relatively high reversible specific capacity and good capability of removing sodium and embedding sodium; the titanic oxide negative electrode material is abundant in raw materials, low in cost and simple in preparation process; the titanic oxide negative electrode material is expected to become a sodium-ion battery negative electrode material.

Description

technical field [0001] The invention belongs to the technical field of energy storage materials and chemical power sources, and in particular relates to a titanium oxide negative electrode material that can be used as a sodium ion battery and a preparation method thereof. Background technique [0002] Since its commercialization in 1991, lithium-ion batteries have experienced great progress in both research and application, and have developed into a relatively mature energy storage power source. Although lithium-ion batteries have been widely used in portable devices due to their advantages of high energy density and long life, however, with the large-scale application of lithium-ion batteries, the shortage of lithium resources has become increasingly prominent. In this case, people began to turn their attention to sodium, which is more abundant in resources, and there has been more and more research on sodium-ion batteries recently. [0003] Sodium element and lithium belo...

Claims

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Application Information

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IPC IPC(8): H01M4/131H01M4/1391H01M4/485
CPCY02E60/122H01M4/131H01M4/1391H01M4/485H01M10/054Y02E60/10
Inventor 王保峰杜国栋王俊生赵飞黄振国
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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