掺杂TiO_(2)对磷酸铁锂废料循环再造的影响研究  

The Effect of Doping TiO_(2) on the Recycling of Lithium Iron Phosphate Waste

作　　者：廖贻鹏 王勇 罗佳[2] 周萍 LIAO Yipeng;WANG Yong;LUO Jia;ZHOU Ping(Zhuzhou Smelting Group Co.,Ltd.Technical Center,Zhuzhou 412007,China;China Machinery International Engineering Design&Research Institute Co.,Ltd.,Changsha 410007,China)

机构地区：[1]株洲冶炼集团股份有限公司技术中心,湖南株洲412007 [2]中机国际工程设计研究院有限责任公司,湖南长沙410007

出　　处：《湖南有色金属》2025年第1期67-71,89,共6页Hunan Nonferrous Metals

摘　　要：文章以某品牌公司提供的磷酸铁锂废粉开展全流程循环再造,并通过掺杂TiO_(2)改善其电化学性能。结果表明,经过循环再造得到了峰型尖锐、完整橄榄石结构的LFP材料,掺杂TiO_(2)提高了磷酸铁锂的电化学性能,掺杂TiO_(2)为1%时样品在0.1C、1C时比容量分别为154.59mAh/g和146.64mAh/g;1C循环充放电400次,容量保持率为91.4%,倍率性能和循环性能进一步表明改善了LFP的电子导电性、降低了材料的内部阻抗、稳定了材料结构和提高了LFP的倍率性能,同时也说明低成本、高附加值和全组分回收的绿色循环再造工艺是可行的。In this paper,the lithium iron phosphate(LFP)waste powder provided by a brand company was recycled in the whole process,and its electrochemical performance was improved by TiO_(2) doping.The results showed that the LFP material with sharp peaks and complete olivine structure is obtained after recycling,and TiO_(2),doping improves the electrochemical performance of LiFePO_(4),and the specific capacities of the sample at 0.1C and 1C with 1% TiO_(2) doping are 154.59 mAh/g and 146.64 mAh/g,respectively;and the capacity retention rate of the LFP material is 91.4%after 400 times of 1C cycling charging/discharging.The improvement of magnification performance and cycling performance further indicate that the electronic conductivity of LFP has been improved,the internal impedance of the material has been lowered,the material structure has been stabilized,and the multiplicity performance of LFP has been improved by doping TiO_(2),and it also indicates that the green recycling process with low cost,high value-added,and full-component recovery is feasible.

关 键 词：磷酸铁锂电池 正极材料 循环再造 掺杂TiO_(2) 电化学性能 

分 类 号：TG146.26[一般工业技术—材料科学与工程]