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Novel Synthesis of 3D Mesoporous FePO4 from Electroflocculation of Iron Filings as a Precursor of High-Performance LiFePO4/C Cathode for Lithium-Ion Batteries
ACS Omega ( IF 3.7 ) Pub Date : 2023-03-29 , DOI: 10.1021/acsomega.2c07838
Jiawu Peng 1 , Xiaoting Hong 1 , Qiongxiang Zhou 1 , Kwan San Hui 2 , Bin Chen 3
ACS Omega ( IF 3.7 ) Pub Date : 2023-03-29 , DOI: 10.1021/acsomega.2c07838
Jiawu Peng 1 , Xiaoting Hong 1 , Qiongxiang Zhou 1 , Kwan San Hui 2 , Bin Chen 3
Affiliation
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This study presents an economic and environmentally friendly method for the synthesis of microspherical FePO4·2H2O precursors with secondary nanostructures by the electroflocculation of low-cost iron fillers in a hot solution. The morphology and crystalline shape of the precursors were adjusted by gradient co-precipitation of pH conditions. The effect of precursor structure and morphology on the electrochemical performance of the synthesized LiFePO4/C was investigated. Electrochemical analysis showed that the assembly of FePO4·2H2O submicron spherical particles from primary nanoparticles and nanorods resulted in LiFePO4/C exhibiting excellent multiplicity and cycling performance with first discharge capacities at 0.2C, 1C, 5C, and 10C of 162.8, 134.7, 85.5, and 47.7 mAh·g–1, respectively, and the capacity of LiFePO4/C was maintained at 85.5% after 300 cycles at 1C. The significant improvement in the electrochemical performance of LiFePO4/C was attributed to the enhanced Li+ diffusion rate and the crystallinity of LiFePO4/C. Thus, this work shows a new three-dimensional mesoporous FePO4 synthesized from the iron flake electroflocculation as a precursor for high-performance LiFePO4/C cathodes for lithium-ion batteries.
中文翻译：
从铁屑的电絮凝中新型合成 3D 介孔 FePO4 作为锂离子电池高性能 LiFePO4/C 阴极的前体
本研究提出了一种经济环保的方法，通过在热溶液中电絮凝低成本铁填料来合成具有二级纳米结构的微球 FePO 4 ·2H 2 O 前体。通过 pH 条件的梯度共沉淀来调整前体的形态和结晶形状。研究了前驱体结构和形貌对合成的LiFePO 4 /C电化学性能的影响。电化学分析表明，从初级纳米粒子和纳米棒组装FePO 4 ·2H 2 O亚微米球形粒子得到LiFePO 4/C表现出优异的多重性和循环性能，0.2C、1C、5C和10C的首次放电容量分别为162.8、134.7、85.5和47.7 mAh·g –1 ，LiFePO 4 /C的容量保持在1C 下 300 次循环后为 85.5%。LiFePO 4 /C电化学性能的显着改善归因于 Li +扩散速率的提高和 LiFePO 4 /C的结晶度。因此，这项工作展示了一种由铁片电絮凝合成的新型三维介孔 FePO 4作为锂离子电池高性能 LiFePO 4 /C 阴极的前体。
更新日期：2023-03-29
中文翻译：
从铁屑的电絮凝中新型合成 3D 介孔 FePO4 作为锂离子电池高性能 LiFePO4/C 阴极的前体
本研究提出了一种经济环保的方法，通过在热溶液中电絮凝低成本铁填料来合成具有二级纳米结构的微球 FePO 4 ·2H 2 O 前体。通过 pH 条件的梯度共沉淀来调整前体的形态和结晶形状。研究了前驱体结构和形貌对合成的LiFePO 4 /C电化学性能的影响。电化学分析表明，从初级纳米粒子和纳米棒组装FePO 4 ·2H 2 O亚微米球形粒子得到LiFePO 4/C表现出优异的多重性和循环性能，0.2C、1C、5C和10C的首次放电容量分别为162.8、134.7、85.5和47.7 mAh·g –1 ，LiFePO 4 /C的容量保持在1C 下 300 次循环后为 85.5%。LiFePO 4 /C电化学性能的显着改善归因于 Li +扩散速率的提高和 LiFePO 4 /C的结晶度。因此，这项工作展示了一种由铁片电絮凝合成的新型三维介孔 FePO 4作为锂离子电池高性能 LiFePO 4 /C 阴极的前体。
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