The high demand and market monopoly of lithium iron phosphate batteries lead to the increasing price of raw materials.Herein,in this work,LiFePO4/C powder was prepared by iron phosphate process with the rusty red and spent Li foil as raw materials,and its electrochemical Li-storage performance was tested.The results showed that LiFePO4/C powder was composed of particles with a size range of 110～400nm.After 350 cycles at 1.0C,the corresponding reversible specific capacity and capacity retention were 129.7mAh/g and 98.0%,respectively,which were comparable to those of commercial LiFePO4 cathode materials.Obviously,these results reduced the preparation cost of LiFePO4,which was beneficial for the circular economy and sustainable development.
[1] 佚名.磷酸铁竞争愈发激烈产能“挤兑”下招标形式崛起[EB/OL].农化时代,2023-01-17[2023-02-27].https://mp.weixin.qq.com/s/PyYqUIVofe5VvUtiqKNjTw.
[2] Sun X,Ouyang M,Hao H.Surging lithium price will not impede the electric vehicle boom[J].Joule,2022,6:1738-1742.
[3] 张化冰.废钢铁之殇——“新常态”下的中国废钢铁产业[J].资源再生,2015(6):46-49.
[4] Hou H Y,Li D D,Liu X X,et al.Recovery of waste Li foils from spent experimental Li-anode coin cells for LiFePO4/C cathode[J].Sustainable Materials and Technologies,2018,17:e00064.
[5] Lan J,Hou H Y,Yu X H,et al.Insights into the role of Li2FeP2O7 phase in LiFePO4/C composite cathode[J].Ionics,2022,28:5059-5069.
[6] Lan J,Hou H Y,Huang B X,et al.The positive role of vitamin C in spindle-like LiFePO4/C cathode derived from two wastes[J].Ionics,2022,28:1583-1593.
[7] Wu J,Dathar G K P,Sun C W,et al.In situ Raman spectroscopy of LiFePO4:size and morphology dependence during charge and self-discharge[J].Nanotechnology,2013,24:424009-424017.
[8] Cui X L,Tuo K Y,Dong H,et al.Modification of phosphorus-doped carbon coating enhances the electrochemical performance of LiFe0.8Mn0.2PO4 cathode material[J].Journal of Alloys and Compounds,2021,885:160946-160958.
[9] Dedryvère R,Maccario M,Croguennec L,et al.X-ray photoelectron spectroscopy investigations of carbon-coated LixFePO4 materials[J].Chemistry of Materials,2008,20:7164-7170.
[10] Wang Y,Luo S H,Yan S,et al.Carbothermal reduction of LiFePO4/C composite cathodes using acid-washed iron red as raw material through carboxylic acid pyrolysis reducing gas participation strategies[J].Electrochimica Acta,2020,363:137159.
[11] 张艳敏.新型核壳结构LiFePO4/C锂离子电池正极材料的制备及其电化学性能研究[C].太原:太原理工大学,2012.
[12] Xu D W,Chu X D,He Y B,et al.Enhanced performance of interconnected LiFePO4/C microspheres with excellent multiple conductive network and subtle mesoporous structure[J].Electrochimica Acta,2015,152:398-407.
[13] 郑宇,王杜,刘勇奇,等.锂电池LiFePO4正极材料性能改善方法综[J].有色金属(冶炼部分),2020(7):76-80.
基金资助
国家自然科学基金(52263010)
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