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Sodium ion battery positive pole material and preparation method thereof

A technology of sodium ion battery and positive electrode material, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problem of unoptimistic cycle performance of positive electrode materials of sodium ion battery, and achieve improved cycle performance, reduced raw material cost, and low price. Effect

Inactive Publication Date: 2015-04-08
DONGGUAN MCNAIR NEW POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the cycle performance of cathode materials for sodium-ion batteries is still not optimistic and cannot meet the actual needs.

Method used

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  • Sodium ion battery positive pole material and preparation method thereof
  • Sodium ion battery positive pole material and preparation method thereof
  • Sodium ion battery positive pole material and preparation method thereof

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Experimental program
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Embodiment 1

[0030] A kind of positive electrode material of sodium ion battery provided by the present embodiment, this positive electrode material is NaFeO 2 and NaNi 0.5 Ti 0.5 o 2 A solid solution whose composition is 0.2NaFeO 2 -0.8NaNi 0.5 Ti 0.5 o 2 .

[0031] Its preparation method is:

[0032] Include the following steps:

[0033] The first step, take by weighing respectively sodium-containing compound anhydrous sodium carbonate (Na 2 CO 3 ), nickel source nickel oxide (NiO), iron source ferric oxide (Fe 2 o 3 ) and titanium source anatase titanium dioxide (TiO 2 ), so that the molar ratio of sodium atom, iron atom, nickel atom and titanium atom is 1:0.2:0.4:0.4, that is, weigh 10.6g anhydrous sodium carbonate, 1.5g nickel oxide, 6.4g ferric oxide and 3.2g Anatase titanium dioxide; Then the anhydrous sodium carbonate, nickel oxide, ferric oxide and titanium dioxide that have been weighed are all placed in the agate ball mill jar, and then 14g agate balls are taken and...

Embodiment 2

[0039] A kind of positive electrode material of sodium ion battery provided by the present embodiment, this positive electrode material is NaFeO 2 and NaNi 0.5 Ti 0.5 o 2 A solid solution whose composition is 0.4NaFeO 2 -0.6NaNi 0.5 Ti 0.5 o 2 .

[0040] Its preparation method is:

[0041] Include the following steps:

[0042] The first step, take by weighing respectively sodium-containing compound sodium bicarbonate (NaHCO 3 ), nickel source nickel hydroxide (Ni(OH) 2 ), iron source ferroferric oxide (Fe 3 o 4 ) and titanium source rutile titanium dioxide (TiO 2 ), so that the molar ratio of sodium atom, iron atom, nickel atom and titanium atom is 1:0.4:0.3:0.3, that is, weigh 8.4g sodium bicarbonate, 3.72g nickel hydroxide, 6.96g ferric oxide and 2.4g Rutile titanium dioxide; then the sodium bicarbonate, nickel hydroxide, ferric oxide and titanium dioxide that have been weighed are all placed in the agate ball mill jar, and then 20g of agate balls are taken and ...

Embodiment 3

[0046] A kind of positive electrode material of sodium ion battery provided by the present embodiment, this positive electrode material is NaFeO 2 and NaNi 0.5 Ti 0.5 o 2 A solid solution whose composition is 0.6NaFeO 2 -0.4NaNi 0.5 Ti 0.5 o 2 .

[0047] Its preparation method is:

[0048] Include the following steps:

[0049] The first step, take respectively sodium-containing compound sodium oxalate (Na 2 C 2 o 4 ), nickel source anhydrous nickel carbonate (NiCO 3 ), iron source ferrous oxide (FeO) and titanium source anatase titanium dioxide (TiO 2 ), so that the molar ratio of sodium atom, iron atom, nickel atom and titanium atom is 1:0.6:0.2:0.2, that is, weigh 13.4g sodium oxalate, 7.08g anhydrous nickel carbonate, 1.44g ferrous oxide and 1.6g sharp Ilmenite-type titanium dioxide; then the weighed sodium oxalate, anhydrous nickel carbonate, ferrous oxide and titanium dioxide are all placed in the agate ball mill jar, and then 16g of agate balls are placed th...

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Abstract

The invention belongs to the technical field of sodium ion batteries and in particular relates to a sodium ion battery positive pole material. The positive pole material is a solid solution of NaFeO2 and NaNiyTi(1-y)O2 and has the composition of xNaFeO2-(1-x)NaNiyTi(1-y)O2, wherein x is equal to 0.2 to 0.6, and y is equal to 0.2 to 0.8. Compared with the prior art, the sodium ion battery positive pole material disclosed by the invention has the advantages that the solid solution of NaFeO2 and NaNiyTi(1-y)O2 serves as a positive pole material, a transition metal Ti is introduced into the solid solution, and the cycle performance of the sodium ion battery adopting the positive pole material can be greatly improved under the condition that the discharge capacity of the battery is not obviously reduced.

Description

technical field [0001] The invention belongs to the technical field of sodium ion batteries, and in particular relates to a sodium ion battery cathode material capable of improving the cycle life of the sodium ion battery and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of electronic equipment, electric tools and low-power electric vehicles, research on energy storage materials with high energy efficiency, abundant resources and environmental friendliness is an inevitable pursuit of human society to achieve sustainable development. In order to meet the large-scale market demand, it is far from enough to measure battery materials only by energy density, charge-discharge rate and other properties. The manufacturing cost and energy consumption of batteries, whether they cause pollution to the environment, and the recycling rate of resources will also become important indicators for evaluating battery materials. At pres...

Claims

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Application Information

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IPC IPC(8): H01M4/525H01M4/1397
CPCH01M4/1397H01M4/525H01M10/054Y02E60/10
Inventor 阮艳莉黄云辉张新河李中延郑新宇
Owner DONGGUAN MCNAIR NEW POWER