Digestion method of titanium oxide in sodium battery positive electrode material and titanium content detection method

BaTiO3 is generated by mixing and sintering barium carbonate and titanium dioxide in sodium electropositive electrode material, and dissolved in hydrochloric acid. A standard curve is established in combination with ICP technology, which solves the cumbersome and accuracy of titanium element extraction and detection, and achieves efficient and low-cost titanium element detection.

CN118980565BActive Publication Date: 2025-08-26TIANJIN ZHONGDIAN NEW ENERGY RES INST CO LTD
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Patent Information

Application Number
CN202410996617.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-07-24
Publication Date
2025-08-26
Estimated Expiration
2044-07-24

AI Technical Summary

Technical Problem

The extraction and detection of titanium elements in the prior art in sodium-electrode materials has problems such as cumbersome operational procedures, long analysis cycles, poor precision, high cost and high safety risks. Especially when using sulfuric acid and strong alkaline substances, interfering elements are easily introduced, which affects the accuracy of detection.

Method used

The titanium dioxide in barium carbonate and sodium electropositive electrode material is mixed and sintered to produce BaTiO3 and dissolve it in hydrochloric acid. Combined with ICP technology, the titanium element content is detected by establishing a standard curve, avoiding the use of sulfuric acid and strong alkali, reducing experimental costs and safety risks.

Benefits of technology

It realizes efficient conversion and accurate detection of titanium elements, improves detection efficiency and accuracy, reduces experimental costs and safety risks, and simplifies experimental equipment requirements.

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Abstract

The present invention provides a method for digesting titanium oxides in sodium cathode materials and a method for detecting titanium content, which comprises the following steps: uniformly mixing the sodium cathode material with barium carbonate to obtain a pre-sintered material; sintering the pre-sintered material in a heating box to obtain a digestion sample 1; dissolving the digestion sample 1 with an acid solution to obtain a digestion sample 2; sintering at a temperature of 500 to 800° C. and for a sintering time of 1 to 2 hours; diluting and fixing the digestion sample 2, and detecting the titanium content therein using an ICP technique and a standard curve method. In the present invention, barium carbonate is mixed with the titanium oxides in the sodium cathode material and sintered to perform a melting reaction, which not only achieves effective conversion of the titanium oxides, but also facilitates subsequent digestion and titanium extraction, thereby increasing the yield of the titanium element; and by avoiding the use of sulfuric acid and a strong sodium-containing base, the efficiency and accuracy of detecting the titanium content using the ICP technique are improved; compared with traditional technologies, the present method significantly reduces the requirements for experimental containers, thereby improving the economic efficiency and safety of the experiment.
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