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High-safety iron-based phosphate sodium ion total battery and preparation method thereof

An iron-based sodium phosphate, high-safety technology, applied in the field of sodium ion full batteries and their preparation, to achieve the effects of improving stability, eliminating hidden dangers of battery bursting, and excellent high and low temperature performance

Active Publication Date: 2022-04-12
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of both positive and negative electrodes as battery materials has not been reported yet

Method used

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  • High-safety iron-based phosphate sodium ion total battery and preparation method thereof
  • High-safety iron-based phosphate sodium ion total battery and preparation method thereof
  • High-safety iron-based phosphate sodium ion total battery and preparation method thereof

Examples

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Effect test

Embodiment 1

[0027] A high-safety iron-based phosphate sodium-ion full battery. The negative electrode material of the full battery is ferric metaphosphate or ferrous phosphite or a mixture of the two with carbon materials, and the positive electrode material is high-valence Ferric phosphate salt. Its preparation method is as follows:

[0028] Dissolve 0.4 g of P123 in a beaker with 100 ml of deionized water, then ultrasonically stir in an ultrasonic machine until it is completely dissolved, then add 0.5 mM ferric sulfate hydrate (ferric iron salt) into the solution and ultrasonically stir for 10 minutes, A clear and transparent solution was obtained, and the solution A was prepared by stirring continuously in an ice-water bath for 1 h. Take another 47 mg GO powder (1 time of conductive polymer pyrrole) and ultrasonically disperse it in a beaker with 100 ml of deionized water, then take 0.7mM phytic acid and disperse it in the beaker, stir ultrasonically for 10 minutes to form a transpare...

Embodiment 2

[0032] A high-safety iron-based phosphate sodium-ion full battery. The negative electrode material of the full battery is ferric metaphosphate or ferrous phosphite or a mixture of the two with carbon materials, and the positive electrode material is high-valence Ferric phosphate salt. Its preparation method is as follows:

[0033] In 20 mL of deionized water, put 0.2 g of P123, ultrasonically stirred and dissolved to form a clear and transparent solution, then 1 mM ferric sulfate hydrate raw material was added to the above solution, ultrasonically stirred for a period of time, and magnetic stirring was performed to obtain solution A. Dissolve 0.2 g of P123 in 44 ml of deionized water with ultrasonic stirring, add 2.5 mM aniline to dissolve evenly, and then disperse 1 mM phytic acid in it until completely dissolved to obtain solution B. With stirring, solution A was dispersed in the solution of step B, transferred to a 250 ml round bottom flask, and stirred magnetically in an ...

Embodiment 3

[0037] A high-safety iron-based phosphate sodium-ion full battery. The negative electrode material of the full battery is ferric metaphosphate or ferrous phosphite or a mixture of the two with carbon materials, and the positive electrode material is high-valence Ferric phosphate salt. Its preparation method is as follows:

[0038] Weigh out 10 mM FeSO 4 ·7H 2 O and 15 mM HPO 3 , the two substances were added to 100 mL of water to dissolve them completely; another 1 mM aniline was dissolved in FeSO 4 ·7H 2 In the aqueous solution of O, ultrasonically stir and dissolve evenly; another 0.3 g of ammonium persulfate is dissolved in H 3 PO3 In the aqueous solution, it was dissolved evenly by ultrasonic stirring. Then, under high-speed stirring, the H 3 PO 3 The mixed solution of ammonium persulfate was slowly added dropwise to aniline and FeSO 4 ·7H 2 in a mixed solution of O. A light green precipitate is produced in the container; the solution is filtered, and the precip...

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Abstract

The invention discloses a high-safety iron-based phosphate sodium ion total battery and a preparation method thereof, a negative electrode material of the total battery is metaphosphate divalent ferric salt or phosphorous acid divalent ferric salt or a mixture of the metaphosphate divalent ferric salt and the phosphorous acid divalent ferric salt with a carbon material, and the actual reversible reaction of a negative electrode of the total battery is Fe2O3 + 6Na + + 6e-2Fe + 3Na2O; the positive electrode material of the total battery is high-valence ferric iron phosphate, and the reversible reaction of the positive electrode is NaFePO4 Na (1-x) FePO4 < + x > Na < + + x > e <->, after the material is prepared into a total battery, the charging and discharging mechanism of the positive electrode and the negative electrode of the total battery is realized by virtue of valence change of iron. The positive electrode material and the negative electrode material adopted by the invention have high safety and are environment-friendly, and low-valence phosphate radicals have good biological compatibility; and meanwhile, the battery has relatively high energy density and excellent high and low temperature performance, and has relatively high commercial value and application prospect.

Description

technical field [0001] The invention relates to a sodium ion full battery and a preparation method thereof, in particular to a high-safety iron-based phosphate sodium ion full battery and a preparation method thereof. Background technique [0002] So far, sodium-ion batteries have not achieved a breakthrough in industrialization. One of the bottlenecks is the lack of suitable practical positive and negative electrode materials. Safety is an important factor restricting the development and application of ion batteries. Battery safety includes not only the dangers caused by explosion and fire, but also biological safety, such as the harm caused by recycling or discarding waste batteries to organisms and the environment. [0003] In general, the total energy stored in a lithium-ion battery is inversely proportional to its safety. As the battery capacity increases, the volume of the battery also increases, and its heat dissipation performance deteriorates, which greatly increas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/054H01M10/058
CPCY02E60/10Y02P70/50
Inventor 张文惠马彬徐鹏冯成杰岳鹿关荣锋
Owner YANCHENG INST OF TECH
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