Inorganic Chemicals Industry >
Study on surface potential of lithium iron phosphate based on kelvin probe technology
Received date: 2022-02-23
Online published: 2022-11-23
Based on the novel surface characterization technology，Kelvin probe force microscope（KPFM） was used to study the surface potential of lithium iron phosphate in order to further study the dynamic behavior of lithium ions on the surface of lithium iron phosphate.The results showed that the work function of lithium iron phosphate film was 5.38 eV at room temperature，and its work function was gradually decreased with the increase of external temperature，and when the temperature reached 80 ℃，the work function of lithium iron phosphate was 4.69 eV.It represented that lithium iron phosphate at high temperature had good electron mobility.In addition，ex situ Kelvin probe detection found that lithium iron phosphate had different surface work functions under different voltage equilibrium states.When it was charged to 4.3 V，the work function of lithium iron phosphate was 4.91 eV，and when it was discharged to 2.5 V，the work function of material was stable at 5.01 eV.It could be seen that the work function of lithium iron phosphate was very sensitive to the amount of lithium ion on the surface.This study was to explore the lithium ion dynamic behavior on the surface of lithium iron phosphate from a new perspective of work function.It was hoped to provide a reference for the study of lithium removal process of other energy storage materials.
Wenyu YANG , Zhiya LIN , Hong FU , Wenyue YAN , Jianping LIN , Guiqing GUAN . Study on surface potential of lithium iron phosphate based on kelvin probe technology[J]. Inorganic Chemicals Industry, 2022 , 54(11) : 65 -70 . DOI: 10.19964/j.issn.1006-4990.2022-0074
| 1 | 冯晓晗,孙杰,何健豪,等.磷酸铁锂正极材料改性研究进 展[J].储能科学与技术,2022,11(2):467-486. |
| 1 | FENG Xiaohan, SUN Jie, HE Jianhao, et al.Research progress in LiFePO4 cathode material modification[J].Energy Storage Science and Technology,2022,11(2):467-486. |
| 2 | 吴军,郑锋华,文春海,等.三相碳改性磷酸铁锂复合材料的制备及其电化学性能研究[J].矿冶工程,2021,41(3):138-142. |
| 2 | WU Jun, ZHENG Fenghua, WEN Chunhai, et al.Preparation and electrochemical performance of three-phase carbon modified lithi-um iron phosphate composite[J].Mining and Metallurgical Engineering,2021,41(3):138-142. |
| 3 | 张婷,林森,于建国.磷酸铁锂正极材料的制备及性能强化研究进展[J].无机盐工业,2021,53(6):31-40. |
| 3 | ZHANG Ting, LIN Sen, YU Jianguo.Research progress in synthesis and performance enhancement of LiFePO4 cathode materials[J].Inorganic Chemicals Industry,2021,53(6):31-40. |
| 4 | 王苑,阮丁山,曾勇,等.模板法制备磷酸铁锂纳米颗粒的研究[J].化工新型材料,2021,49(9):151-154，158. |
| 4 | WANG Yuan, RUAN Dingshan, ZENG Yong, et al.Study on preparation of LiFePO4 nanoparticle by template method[J].New Chemical Materials,2021,49(9):151-154，158. |
| 5 | 曹贺,闻雷,郭震强,等.炭材料在低温型磷酸铁锂材料中的应用分析及展望[J].新型炭材料,2022,37(1):46-58. |
| 5 | CAO He, WEN Lei, GUO Zhenqiang, et al.Application and prospects for using carbon materials to modify lithium iron phosphate materials used at low temperatures[J].New Carbon Materials,2022,37(1):46-58. |
| 6 | 孙锴,王鑫,邓腾,等.尿素辅助高性能LiFePO4正极材料的制备及电化学性能研究[J].化工新型材料,2020,48(4):54-59. |
| 6 | SUN Kai, WANG Xin, DENG Teng, et al.Preparation of LiFePO4 anode assisted by urea and its electrochemical property[J].New Chemical Materials,2020,48(4):54-59. |
| 7 | 吴星宇,阮丁山,毛林林,等.溶剂热法制备Mn掺杂LiFePO4正极材料及其电化学性能[J].无机化学学报,2021,37(8):1399-1406. |
| 7 | WU Xingyu, RUAN Dingshan, MAO Linlin, et al.Mn-doped LiFePO4 cathode material：Solvothermal preparation and electrochemical performance[J].Chinese Journal of Inorganic Chemistry,2021,37(8):1399-1406. |
| 8 | 肖资龙,张经济,张志杰,等.Al和Mg共掺杂LiFePO4/C正极材料的电化学性能研究[J].矿冶工程,2018,38(5):148-151，156. |
| 8 | XIAO Zilong, ZHANG Jingji, ZHANG Zhijie, et al.Electrochemical performances of LiFePO4/C via Al and Mg co-doping[J].Mining and Metallurgical Engineering,2018,38(5):148-151，156. |
| 9 | KOBAYASHI S, FISHER C A J, KATO T, et al.Atomic-scale observations of（010） LiFePO4 surfaces before and after chemical delithiation[J].Nano Letters,2016,16(9):5409-5414. |
| 10 | MASCARO A, WANG Zi, HOVINGTON P, et al.Measuring spatially resolved collective ionic transport on lithium battery cathodes using atomic force microscopy[J].Nano Letters,2017,17(7):4489-4496. |
| 11 | LI Xing, JIANG Fei, QU Ke, et al.First atomic-scale insight into degradation in lithium iron phosphate cathodes by transmission electron microscopy[J].The Journal of Physical Chemistry Letters,2020,11(12):4608-4617. |
| 12 | DROZHZHIN O A, SOBOLEV A V, SUMANOV V D, et al.Exploring the origin of the superior electrochemical performance of hydrothermally prepared Li-rich lithium iron phosphate Li 1+ δ Fe1- δ PO4 [J].The Journal of Physical Chemistry C,2020，124(1):126-134. |
| 13 | NAGPURE S C, BHUSHAN B, BABU S S.Surface potential measurement of aged Li-ion batteries using Kelvin probe microsco-py[J].Journal of Power Sources,2011,196(3):1508-1512. |
| 14 | XU Guigui, ZHONG Kehua, YANG Yanmin, et al.Insight into delithiation process on the LiFePO4（010） surface from a novel viewpoint of the work function[J].Solid State Ionics,2019,338: 25-30. |
/
| 〈 |
|
〉 |