In-situ preparation of sodium vanadium fluorophosphate from sodiumized vanadium slag leaching solution and its performance study

CHU Chengyu; WEN Jing; JIANG Tao; YANG Jinchao

doi:10.7513/j.issn.1004-7638.2025.05.016

Volume 46 Issue 5

Oct. 2025

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CHU Chengyu, WEN Jing, JIANG Tao, YANG Jinchao. In-situ preparation of sodium vanadium fluorophosphate from sodiumized vanadium slag leaching solution and its performance study[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(5): 154-162. doi: 10.7513/j.issn.1004-7638.2025.05.016

Citation:

CHU Chengyu, WEN Jing, JIANG Tao, YANG Jinchao. In-situ preparation of sodium vanadium fluorophosphate from sodiumized vanadium slag leaching solution and its performance study[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(5): 154-162. doi: 10.7513/j.issn.1004-7638.2025.05.016

Citation:

CHU Chengyu, WEN Jing, JIANG Tao, YANG Jinchao. In-situ preparation of sodium vanadium fluorophosphate from sodiumized vanadium slag leaching solution and its performance study[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(5): 154-162. doi: 10.7513/j.issn.1004-7638.2025.05.016

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In-situ preparation of sodium vanadium fluorophosphate from sodiumized vanadium slag leaching solution and its performance study

doi: 10.7513/j.issn.1004-7638.2025.05.016

CHU Chengyu^1
,,
WEN Jing^{1, 2},
JIANG Tao^{1, 2
,
,},
YANG Jinchao¹

1.
School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China
2.
Key Laboratory of Ecological Metallurgy of Polymetallic Symbiotic Minerals, Ministry of Education, Northeastern University, Shenyang 110819, Liaoning, China

More Information

Received Date: 2025-04-15
Accepted Date: 2025-05-16
Rev Recd Date: 2025-05-13
Publish Date: 2025-10-30

Abstract

Abstract

To address the dilemma of high-cost in using vanadium sources for the traditional preparation of sodium vanadium fluorophosphate (NVOPF), a novel solvothermal synthesis process was proposed. This method utilizes sodium-treated vanadium slag leaching solution as a substitute for high-purity vanadium sources, and successfully realized the direct conversion from metallurgical by-products to battery materials. In addition, the effects of the dosage of reducing agent citric acid (C₆H₈O₇), solution pH, and synthesis temperature on vanadium conversion rate and material properties were investigated. The experimental results showed that with the increase of the dosage of reducing agent, pH, and temperature, the vanadium conversion rate showed a trend of first increasing and then decreasing. Under the conditions of pH value of solution of 6, molar ratio of citric acid to vanadium of 1.5, and solvothermal temperature of 180 °C, the synthesized NVOPF material exhibited a regular cubic block structure with vanadium in the +4 oxidation state (V⁴⁺) and the initial discharge capacity at a 0.2C rate was 68 mAh/g, demonstrating good structural stability and a third-cycle Coulombic efficiency of 96%. However, there is still a certain gap between the high-rate performance and actual capacity of the material and the theoretical value, which is primarily affected by the impurities in the leaching solution. This study provides a new solution for the high value added utilization of vanadium slag and the preparation of low-cost cathode materials for sodium-ion battery.
- sodium vanadium slag water leaching solution,
- solvothermal preparation,
- sodium vanadium fluorophosphate,
- electrochemical performance

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References(20)

References

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