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High rate, long cycle and wide temperature range aqueous sodium ion whole battery

A sodium ion, full battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of poor rate performance, unsatisfactory long cycle, short cycle life, etc., and achieve the effect of high rate performance

Active Publication Date: 2019-06-14
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a water-based sodium-ion full battery, which uses commercial nickel-based materials to replace Sodium-based vanadium phosphate cathode material to solve the problems of short cycle life, poor rate performance and inability to be used in a wide range of ambient temperatures in existing aqueous sodium-ion batteries

Method used

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  • High rate, long cycle and wide temperature range aqueous sodium ion whole battery
  • High rate, long cycle and wide temperature range aqueous sodium ion whole battery
  • High rate, long cycle and wide temperature range aqueous sodium ion whole battery

Examples

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Embodiment 1

[0023] This embodiment has described a kind of with nickel hydroxide as positive electrode, titanium sodium phosphate as negative electrode, sodium trifluoromethanesulfonate (CF 3 NaO 3 S) Aqueous sodium ion full battery in which the aqueous solution is the electrolyte.

[0024] The positive electrode is a commercial nickel-metal hydride battery as the positive electrode active material, washed with a large amount of deionized water until the solution becomes neutral, and then dried in a vacuum oven at 80°C for 12 hours as the positive electrode.

[0025] Negative electrode gets sodium titanium phosphate as negative electrode active material, conductive carbon black is conductive agent, polyvinylidene fluoride (PVDF) is binding agent, according to active material: conductive carbon: the mass ratio of binding agent=8:1:1, stir Mixed evenly, coated on titanium foil, and then dried in a vacuum oven at 80°C for 12 hours, as a negative electrode.

[0026] The electrolyte configur...

Embodiment 2

[0030] This embodiment has described a kind of with nickel hydroxide as positive pole, sodium titanium phosphate as negative pole, sodium sulfate (Na 2 SO 4 ) Aqueous solution is the aqueous sodium ion full battery of electrolytic solution.

[0031] The preparation of the positive electrode is the same as in Example 1.

[0032] Negative electrode gets titanium sodium phosphate as negative electrode active material, and acetylene black is conductive agent, and polytetrafluoroethylene (PTFE) emulsion is binding agent, according to active material: conductive carbon: the mass ratio of binding agent=8:1:1, stir Mix evenly, roll it into a thin film on a roller press, coat it on a titanium foil, then dry it in a vacuum oven at 100°C for 12 hours, and finally press it on a nickel foam as a negative electrode.

[0033] The electrolyte configuration uses sodium sulfate (Na 2 SO 4 ) is the electrolyte, Na 2 SO 4 The mass ratio to water is 0.14204:1.

[0034] Finally, the positive...

Embodiment 3

[0038] This embodiment has described a kind of with nickel hydroxide as positive pole, sodium vanadium titanium phosphate as negative pole, sodium perchlorate (NaClO 4 ) Aqueous solution is the aqueous sodium ion full battery of electrolytic solution.

[0039] The preparation of the positive electrode is the same as in Example 1.

[0040] Negative electrode gets sodium vanadium titanium phosphate as negative electrode active material, and acetylene black is conductive agent, and polytetrafluoroethylene (PTFE) emulsion is binding agent, according to active material: conductive carbon: the mass ratio of binding agent=8:1:1, Stir and mix evenly, roll it into a thin film on a roller press, coat it on a titanium foil, then dry it in a vacuum oven at 100°C for 12 hours, and finally press it on a titanium mesh as a negative electrode.

[0041] The electrolyte configuration uses sodium perchlorate (NaClO 4 ) as the electrolyte, NaClO 4 The mass ratio to water is 0.24488:1.

[0042...

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Abstract

The invention relates to a high rate, long cycle and wide temperature range aqueous sodium ion whole battery and belongs to the technical field of chemical power supply. Cathode and anode active substances of the aqueous sodium ion battery are inorganic materials. A cathode material is a commercial nickel base material. An anode material is sodium base phosphate. Electrolyte is sodium salt solution. When the battery works, anions carry out adsorption and desorption reaction at a cathode. Sodium ions carry out reversible de-intercalation at an anode. Through utilization of a double ion mixing mechanism, energy stored and converted. Compared with a conventional aqueous sodium ion whole battery, a battery system provided by the invention has the advantages that rate capability (rapid charge / discharge) is higher, cycle life is long, and the battery can work in a wider temperature range. The battery has potential application prospect in the field of large-scale energy storage.

Description

technical field [0001] The invention relates to a water system sodium ion full battery, which belongs to the field of chemical power sources. Background technique [0002] Large-scale energy storage is the technical basis for effectively utilizing natural energy and building a global energy internet. Among them, sodium-ion batteries have a similar working principle to lithium-ion batteries, and are rich in sodium resources and low in cost. They are considered to be one of the most promising electrochemical energy storage systems. However, for organic sodium-ion batteries, due to harsh assembly conditions, the production cost is high; the electrolyte is an organic flammable component, and there are potential safety issues, which limit the application of sodium-ion batteries. If the organic electrolyte is replaced by an aqueous solution, the safety problem of sodium-ion batteries can be solved, and a strict assembly environment is not required, which greatly reduces productio...

Claims

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Application Information

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IPC IPC(8): H01M10/36H01M4/36H01M4/58
CPCY02E60/10
Inventor 陶占良年庆舜刘建冯雅芝刘双陈军梁静李海霞
Owner NANKAI UNIV
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