Process for preparing electrode material of multi-element doped sodium-ion battery by use of sodium jarosite

A sodium-ion battery, jarosite technology, applied in battery electrodes, circuits, electrical components and other directions, can solve problems such as multi-component impurity, increase preparation cost, etc., achieve low cost, improve performance, and good performance of electrode materials.

Inactive Publication Date: 2015-05-20
SHAANXI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

Multivariate doping furthe...

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  • Process for preparing electrode material of multi-element doped sodium-ion battery by use of sodium jarosite
  • Process for preparing electrode material of multi-element doped sodium-ion battery by use of sodium jarosite

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Embodiment Construction

[0013] The present invention uses zinc hydrometallurgy waste slag-jarosite to prepare a process for multi-element doped sodium-ion battery electrode materials, comprising:

[0014] (1) Add sulfuric acid solution to the jarosite and stir until the jarosite dissolves. After the solution is evaporated to dryness at 80°C, the solid product is pre-calcined at 200°C for 6 hours to obtain anhydrous ferric sulfate and sodium sulfate mixture;

[0015] (2) In the mixture, after adding anhydrous sodium sulfate and a carbon forming agent (see Table 1 for the formula), mix in a planetary ball mill (spherical tank and balls are stainless steel) for 12 hours to obtain a precursor;

[0016] (3) Calcining the precursor at 360-400° C. for 20 hours under a nitrogen protective atmosphere to obtain an electrode material.

[0017] Using the electrode material as the positive electrode and sodium as the counter electrode to assemble a battery, it was subjected to cycle charge and discharge tests. A...

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Abstract

The invention discloses a process for preparing an electrode material of a multi-element doped sodium-ion battery by use of sodium jarosite. The process is characterized by comprising the steps of adding a sulfuric acid solution into sodium jarosite, stirring until the sodium jarosite is dissolved, evaporating the solution, presintering, uniformly mixing the acquired product with anhydrous sodium sulfate and carbon forming agent, calcining again to obtain the electrode material of the multi-element doped sodium-ion battery. According to the process, industrial waste residues are adopted to prepare the electrode material with high additional value, the cost is low, the performance is good, and the process is simple and has good economical and environment benefits.

Description

technical field [0001] The invention relates to a preparation method of an electrode material for a sodium ion battery, in particular to a method for preparing a multi-element doped sodium ion electrode material by utilizing the waste slag-jarosite discharged from a zinc smelter. Background technique [0002] At present, the research on high-performance lithium-ion batteries and their electrode materials is a hot spot in the fields of electrochemistry, material chemistry, physics, etc., and the properties of sodium ions and lithium ions, which are both the main group I of the periodic table of elements, have many similarities. At this point, sodium ions are fully capable of constructing a widely used secondary battery like lithium-ion batteries. Moreover, compared with lithium-ion batteries, sodium-ion batteries have lower raw material costs than lithium-ion batteries, and the half-cell potential (E 0Na+ / Na=E 0Li+ / Li+0.3V) is higher than that of lithium-ion batteries, an...

Claims

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Application Information

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IPC IPC(8): H01M4/505H01M4/525
CPCY02E60/10
Inventor 谭宏斌马小玲侯小强董洪峰郭从盛
Owner SHAANXI UNIV OF TECH
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