Thermal Separation and Recycling of Lithium Iron Phosphate Cathode Waste AITranslate
Abstract AITranslate
Problems in the conventional recycling process of lithium iron phosphate cathode waste include huge resource consumption,tedious steps,and secondary pollution.Using absolute ethanol as the solvent,lithium iron phosphate cathode waste was thermally dissolved to achieve the non-destructive and effective separation of the active substance from the current collector,and the phase structure and electrochemical properties of the regenerated LiFePO_4 cathode material at different calcination temperatures were characterized.The results show that the regenerated LiFePO_4 cathode materials obtained by calcination at diffe-rent temperatures have a pure phase,and the cathode material obtained by pre-calcination at 450°C for 4 h followed by calcination at 650°C for 10 h shows the maximum diffraction intensity.The constant-current charge/discharge test results at room temperature in 2.5~4.3 V voltage range show that the cathode material calcined at 650°C for 10 h exhibits the maximum discharge specific capacity of 137.8 mA·h/g,a capacity retention rate of 92.8%after 100 cycles,and a Coulombic efficiency close to 99%.The electrochemical impedance spectroscopy of this cathode material also exhibits a minimum charge transfer impe-dance of 130Ω.The absolute ethanol thermal dissolution method also provides a new separation way for the recovery of similar materials.
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Basic Information:
DOI：
Chinese Library Classification Number:TF09[冶金工程—冶金物理化学]
Citation Information:
Problems in the conventional recycling process of lithium iron phosphate cathode waste include huge resource consumption,tedious steps,and secondary pollution.Using absolute ethanol as the solvent,lithium iron phosphate cathode waste was thermally dissolved to achieve the non-destructive and effective separation of the active substance from the current collector,and the phase structure and electrochemical properties of the regenerated LiFePO_4 cathode material at different calcination temperatures were characterized.The results show that the regenerated LiFePO_4 cathode materials obtained by calcination at diffe-rent temperatures have a pure phase,and the cathode material obtained by pre-calcination at 450°C for 4 h followed by calcination at 650°C for 10 h shows the maximum diffraction intensity.The constant-current charge/discharge test results at room temperature in 2.5~4.3 V voltage range show that the cathode material calcined at 650°C for 10 h exhibits the maximum discharge specific capacity of 137.8 mA·h/g,a capacity retention rate of 92.8%after 100 cycles,and a Coulombic efficiency close to 99%.The electrochemical impedance spectroscopy of this cathode material also exhibits a minimum charge transfer impe-dance of 130Ω.The absolute ethanol thermal dissolution method also provides a new separation way for the recovery of similar materials.
quote
| GB/T 7714-2015 | [1] ZHANG Yu-cai. Thermal Separation and Recycling of Lithium Iron Phosphate Cathode Waste[J]. Rare Metals and Cemented Carbides, 2023(3): 82-86. |
| MLA | [1] ZHANG Yu-cai. "Thermal Separation and Recycling of Lithium Iron Phosphate Cathode Waste." Rare Metals and Cemented Carbides, no. 3, 2023, pp. 82-86. |
| APA | [1] ZHANG Yu-cai. (2023). Thermal Separation and Recycling of Lithium Iron Phosphate Cathode Waste. Rare Metals and Cemented Carbides(3), 82-86. |
| IEEE | [1] ZHANG Yu-cai, "Thermal Separation and Recycling of Lithium Iron Phosphate Cathode Waste," Rare Metals and Cemented Carbides, no. 3, pp. 82-86, 2023. keywords: {lithium-ion battery;LiFePO4;cathode waste recovery;green solvent;cyclic voltammetry} |