Aqueous ion-exchange cell

An ion-exchange battery, water system technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of high price, high consumption, limited lithium reserves, etc., and achieve the effect of low production cost, high power density, and rich content

Inactive Publication Date: 2016-02-10
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The demand for electronic products in modern society is greater, and the lithium battery energy storage system as the main power source consumes a large amount of lithium source reserves. Lithium reserves in the earth are limited and expensive

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0028] The preparation process of the positive / negative pole of the present invention and LiMn 2 o 4 -NaTi 2 (PO4) 3 The assembly steps of the / C battery system are as follows:

[0029] (1) LiMn 2 o 4 Preparation of positive electrode

[0030] With Li 2 CO 3 and MnCO 3 As raw materials, nano-scale spinel-type LiMn was prepared by high-temperature solid-phase synthesis. 2 o 4 . (Reference HaishengTao, ShuqiongZhang, YingyingCheng, XuemeiZhang, Nanosci.Nanotechnol.Lett.7, 555-559(2015))

[0031] (2)NaTi 2 (PO 4 ) 3 and NaTi 2 (PO 4 ) 3 Preparation of / C negative electrode

[0032] with C 4 h 4 o 5 Na (sodium hydrogen tartrate), TiO 2 , (NH 4 ) 2 HPO 4 As a raw material, the precursor was obtained by sol-gel method, and then NaTi was prepared by calcination 2 (PO 4 ) 3 .

[0033] with C 4 h 4 o 5 Na (sodium hydrogen tartrate), TiO 2 , (NH 4 ) 2 HPO 4 and (CH 2 Oh) 2 As a raw material, the precursor was obtained by sol-gel method, and then NaT...

Embodiment 1

[0037] The active material, the conductive agent and the binder are evenly mixed, coated on the current collector, dried, and pressed into positive and negative electrode films respectively. A full battery is assembled using glass fiber as a separator and an aqueous solution containing sodium and lithium ions as an electrolyte.

[0038] The cathode material is commercially available LiMn 2 o 4 (Qingdao Xinzheng Lithium Industry Co., Ltd.), the proportion of slurry is according to LiMn 2 o 4: Conductive carbon black: binder (the binder is polyvinylidene fluoride, referred to as PVDF) = 80:10:10 mass ratio is fully mixed, then evenly coated on the carbon paper current collector, dried and pressed into a positive electrode .

[0039] The negative electrode material is NaTi 2 (PO 4 ) 3 , the negative electrode slurry is composed of NaTi 2 (PO 4 ) 3 : Conductive carbon black: binder = 75:15:10 mass ratio mixed, then evenly coated on the carbon paper current collector, dri...

Embodiment 2

[0043] Prepare positive / negative electrode material according to the method for embodiment 1, positive electrode material adopts commercially available LiMn 2 o 4 , the proportion of slurry is according to LiMn 2 o 4 : conductive carbon black: binder = 80:10:10 mass ratio fully mixed, then evenly coated on the carbon paper current collector, dried and pressed to form a positive electrode.

[0044] The negative electrode material is NaTi 2 (PO 4 ) 3 / C, the composition of negative electrode slurry is NaTi 2 (PO 4 ) 3 / C: conductive carbon black: binder = 80:10:10 mass ratio mixed, then evenly coated on the carbon paper collector, dried and pressed to form a negative electrode. In this embodiment, the actual capacity of the positive electrode material is 85mAh / g, the negative electrode is 95mAh / g, and the coating amount of the positive electrode is 10mg / cm 2 , negative electrode 7mg / cm 2 , with glass fiber as the diaphragm, 0.5mol / LNa 2 SO 4 and 0.5mol / LLi 2 SO 4 m...

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Abstract

The invention discloses an aqueous ion-exchange cell, which comprises a positive film, a negative film, a diaphragm and an electrolyte, wherein the negative film comprises a negative active material, a conductive material and an adhesive; the negative active material is NaTi<2>(PO<4>)<3>; and the negative active material accounts for 65%-85% of the total weight of the negative film. Compared with the prior art, the aqueous ion-exchange cell has the advantages of high power density, high energy density and long cycle lifetime, and is green and safe; the used electrolyte is a saline solution which is safe, nontoxic and cheap and contains sodium and lithium; the problems that a conventional organic electrolyte is flammable and combustible, and pollutes the environmentare solved; the targets of environmental protection and safety are achieved; the raw material cost is reduced; and the aqueous ion-exchange cell is a sustainable cell system.

Description

technical field [0001] The invention relates to an ion exchange battery, which belongs to the field of secondary batteries. Background technique [0002] With the implementation of the sustainable development strategy in the world, the development and utilization of new energy is particularly important. Chemical batteries play a key role in the storage and conversion of new energy. Although traditional lithium-ion batteries have high energy density, organic electrolytes are poor in safety and high in cost, which limits their application in large-scale energy storage devices. [0003] The present invention develops an exchange ion water battery system. The principle of the battery is: during charging and discharging, one metal ion is extracted / intercalated from the positive electrode material, and another metal ion is inserted / extracted from the negative electrode material. The electrolyte is a mixed aqueous electrolyte composed of the above two metal ions. [0004] Modern...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/36H01M4/58
CPCH01M4/5825H01M10/36Y02E60/10
Inventor 童祥陶海升甘露侯丁
Owner ANHUI NORMAL UNIV
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