Niobium oxide compositions and methods for using same

一种铌氧化物、组合物的技术，应用在铌氧化物组合物和使用其领域，能够解决降低蓄电池相对能量密度、低比容量等问题

Inactive Publication Date: 2013-05-01
BOARD OF RGT THE UNIV OF TEXAS SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the material has a low specific capacity (≈120 mAh / g) and the loss of 1.3 V relative to the carbon anode reduces the relative energy density of batteries using this titanium-based anode

Method used

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  • Niobium oxide compositions and methods for using same
  • Niobium oxide compositions and methods for using same
  • Niobium oxide compositions and methods for using same

Examples

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example

[0074] The following examples are provided to further illustrate certain embodiments of the invention. These are not intended to limit the invention to the components, compositions, systems, techniques or methods described in these examples. Unless indicated otherwise, parts are parts by weight, temperature is in °C or is at ambient temperature, and pressure is at or near atmospheric.

example 1

[0075] Example 1: Synthesis of TNO

[0076] TNO is prepared by sol-gel technique. Use Nb 2 o 5 (Alfa, 99.9%), hydrofluoric acid (40 / 70HF / H 2 O), Ti(OC 3 h 7 ) 4 , ammonia and citric acid monohydrate as starting materials. First, the Nb 2 o 5 Dissolve in hydrofluoric acid to form a clear solution. To remove F- ions from solution, ammonia is added to obtain white Nb(OH) 5 precipitation. After the precipitate was washed and dried, the Nb(OH) 5 Dissolve in citric acid to form a citrate Nb(V) solution. To this solution was added Ti(OC 3 h 7 ) 4 water-ethanol solution, while using ammonia to adjust the pH of the solution. This final mixture containing Nb(V) and Ti(IV) ions was stirred at 90°C to form a citrate gel. This gel was heated to 140°C to obtain the precursor. The precursor was then annealed at 900°C and at 1350°C to obtain the TNO product.

example 2

[0077] Example 2: Synthesis of DTNO

[0078] DTNO is prepared by conventional solid-state reactions. The stoichiometric amount of starting material Nb 2 o 5 (Alfa, 99.9%), Nb (Alfa, 99.9%) and TiO 2 (Alfa, 99.9%) is thoroughly ground and pressed into pellets. The pellet was wrapped in Ta foil, sealed in a vacuum quartz tube and annealed at 1100 °C for 24 hours.

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Abstract

The disclosure relates a niobium oxide useful in anodes of secondary lithium ion batteries. Such niobium oxide has formula LixM1−yNbyNb2O7, wherein 0≰x≰3, 0≰y≰1, and M represents Ti or Zr. The niobium oxide may be in the form of particles, which may be carbon coated. The disclosure also relates to an electrode composition containing at least one or more niobium oxides of formula LixM1−yNbyNb2O7. The disclosure further relates to electrodes, such as anodes, and batteries containing at least one or more niobium oxides of formula LixM1−yNbyNb2O7. Furthermore, the disclosure relates to methods of forming the above.

Description

[0001] priority statement [0002] This application claims under 35 U.S.C. § 119(e) to U.S. Provisional Priority to patent application Ser. No. 61 / 369,515, which is hereby incorporated by reference in its entirety. [0003] Statement of Government Interests [0004] This invention was made, at least in part, with funding from the United States Department of Energy through Grant No. 6805919MOD8 from the Lawrence Berkley National Laboratory. The US Government has certain rights in this invention. technical field [0005] The present invention relates to electrodes useful for secondary lithium ion batteries, particularly niobium oxide compositions in anodes, electrodes and secondary batteries containing said compositions, and methods of using them in electrodes and secondary batteries. Background technique [0006] Secondary (rechargeable) lithium-ion batteries are widely used in consumer electronic devices, such as cellular telephones and laptop computers, due in part to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M10/052C01G33/00
CPCH01M4/505Y02E60/122C01P2002/72H01M4/525C01P2002/77C01P2006/40C01G33/006C01G33/00H01M10/052C01P2004/03C01P2004/04H01M4/485Y02E60/10H01M4/13H01M10/0525
Inventor 约翰·B·古迪纳夫韩建涛
Owner BOARD OF RGT THE UNIV OF TEXAS SYST
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