锂离子电池LiFePO4/Li3V2(PO4)3复合正极材料的制备及性能研究

doi:10.3976/j.issn.1002-4026.2020.05.008

山东科学 ›› 2020, Vol. 33 ›› Issue (5): 67-72.doi: 10.3976/j.issn.1002-4026.2020.05.008

锂离子电池LiFePO₄/Li₃V₂(PO₄)₃复合正极材料的制备及性能研究

秦显忠^a,b,蔡飞鹏^a,b，王波^a,b，蒋波^a,b，姜桂林^a,b

齐鲁工业大学（山东省科学院），a.山东省科学院能源研究所；b.能源与动力工程学院，山东济南 250014

收稿日期:2020-03-06 出版日期:2020-10-08 发布日期:2020-09-27
作者简介:秦显忠（1988—），女，助理研究员，研究方向为电池材料。Tel:13583198590,E-mail: qinxz@sderi.cn
基金资助:
山东省重点研究发展计划（2017CXGC0502，2019GGX103038）；山东省科学院国际科技合作项目（2019GHPY17）

Preparation and properties of LiFePO₄/Li₃V₂ (PO₄)₃ composite cathode material for lithium-ion batteries

QIN Xian-zhong^a,b, CAI Fei-peng^a,b, WANG Bo^a,b , JIANG Bo^a，b, JIANG Gui-lin^a,b

a.Energy Institute; b. School of Energy and Power Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China

Received:2020-03-06 Online:2020-10-08 Published:2020-09-27

摘要/Abstract

摘要： 为了提高LiFePO₄正极材料的离子导电性，采用液相共沉淀法与碳热还原法制备一系列质量配比的LiFePO₄/Li₃V₂(PO₄)₃复合材料，通过X-射线衍射、扫描电镜、恒流充放电测试仪等分析测试手段测试样品。研究发现，m(LiFePO₄):m(Li₃V₂(PO₄)₃)=6:4时复合材料形貌较为规则且结晶度较高，在0.1C，1.0C，2.0C，5.0C，10.0C倍率下放电比容量可达148，136，130.5 ，121.5，112.3 mA·h·g-1，1C倍率下循环100次容量保持率仍可达98.5%，有效地解决了LiFePO₄离子电导率低的问题，推动了该复合正极材料在动力型锂离子电池中的应用。

关键词: 锂离子电池, 正极材料, 液相共沉淀法, 倍率性能, 循环性能

Abstract: LiFePO₄/Li₃V₂(PO₄)₃composite cathode materials with a series of mass ratios were synthesized using the liquid-phase co-precipitation method and carbon thermal-reduction process to improve the electronic conductivity of LiFePO₄cathodes. X-ray diffraction, scanning electron microscopy, constant-current charge and discharge testing, and other analytical methods were used to analyze the phase composition, morphology, and electrochemical performance of the composites. When the mass ratio of LiFePO₄ and Li₃V₂(PO₄)₃ was 6:4, the composite exhibited regular morphology, higher crystallinity, and the best electrochemical performance: the discharge capacity was 148, 130.5, 121.5,and 112.3 mA·h·g-1 at rates of 0.1C, 1.0C, 2.0C, 5.0C, and 10.0C, respectively, and the capacity remained above 98.5% after 100 cycles at 1C. This effectively solves the problem of low conductivity of the LiFePO₄ material and will accelerate its application in power lithium-ion batteries.

Key words: lithium-ion batteries, cathode material, liquid-phase co-precipitation, rate capability, cycle life

中图分类号:

TM912

秦显忠, 蔡飞鹏, 王波, 蒋波, 姜桂林. 锂离子电池LiFePO₄/Li₃V₂(PO₄)₃复合正极材料的制备及性能研究[J]. 山东科学, 2020, 33(5): 67-72.

QIN Xian-zhong, CAI Fei-peng, WANG Bo , JIANG Bo, JIANG Gui-lin. Preparation and properties of LiFePO₄/Li₃V₂ (PO₄)₃ composite cathode material for lithium-ion batteries[J]. Shandong Science, 2020, 33(5): 67-72.

参考文献 17

1	LI Q, FUNG K Y, XU L D, et al. Process synthesis: selective recovery of lithium from lithium-ion battery cathode materials[J]. Industrial & Engineering Chemistry Research, 2019, 58(8): 3118-3130. DOI:10.1021/acs.iecr.8b04899.
2	LI F L, SI Y B, LI Z J, et al. Intermolecular cyclic polysulfide as cathode materials for rechargeable lithium batteries [J]. Journal of Materials Chemistry A,2020,1(8):87-90. DOI: 10.1039/C9TA10611A.
3	LIANG Q, YUE H F, WANG S F, et al. Recycling and crystal regeneration of commercial used LiFePO4 cathode materials [J]. Electrochemical Acta,2020,330: 456-460.DOI:10.1016/j.electacta.2019.135323.
4	WANG X F,FENG Z J,HOU X L, et al. Fluorine doped carbon coating of LiFePO4 as a cathode material for lithium-ion batteries[J]. Chemical Engineering Journal, 2020,379: 623-625.DOI:10.1016/j.cej.2019.122371.
5	SUN Q F,LI X L,ZHANG H Z,et al.Resynthesizing LiFePO4/C materials from the recycled cathode via a green full-solid route[J]. Journal of Alloys and Compounds,2020,818: 153292-153298. DOI: 10.1016/j.jallcom.2019.153292.
6	NI Q, BAI Y, YANG Z, et al. Wet-chemical coordination synthesized Li3V2(PO4)3/C for Li-ion battery cathodes [J]. Journal of alloys and compounds,2017,729: 49-56.DOI:10.1016/j.jallcom.2017.09.106.
7	YAN J, YUAN W, XIE H, et al. Preparation and electrochemical performance of Na-doped Li3V2(PO4)3/C cathode material [J].Journal of Solid State Electrochemistry, 2012,16(10): 3201-3206.DOI:10.1007/s10008-012-1764-x.
8	WANG H, LI L F, WANG S L, et al. Fabrication of metal-doped hierarchical trimodal porous Li3V2(PO4)3/C composites with enhanced electrochemical performances for lithium-ion batteries[J]. Metallurgical & Materials Transactions,2019,50(3):1468-1479.DOI:10.1007/s11661-018-5075-4.
9	WANG B Y,YAO L, WANG Y , et al. Synthesis of porous bowl-like LiFePO4/C composite with ultrahigh rate capability[J]. International Journal of Electrochemical Science,2017,12(4):2692-2703. DOI:10.20964/2017.04.23.
10	GAO C, LIU H, LIU G B, et al. High-rate performance of xLiFePO4·y Li3V2(PO4)3/C composite cathode materials synthesized via polyol process[J].Materials Science & Engineering B, 2016,178(4):272-276.DOI:10.1016/j.mseb.2012.11.016.
11	NAN W Z,YAN S J,PENG S K, et al. Synthesis and performance of LiFePO4-C/grapheme composite[J]. Journal of Materials Engineering,2018,46(4):43-50.DOI:10.11868/j.issn.1001-4381.2017.000826.
12	ZHANG L L, SUN H B, YANG X L, et al. Natural graphite enhanced the electrochemical performance of Li3V2(PO4)3 cathode material for lithium ion batteries[J]. Journal of Solid State Electro-chemistry, 2016,20(20):311-315. DOI: 10.1007/s10008-010-1255-x.
13	MENG X D, HAN B, WANG Y F, et al. Effects of samarium doping on the electrochemical performance of LiFePO4/C cathode material for lithium-ion batteries[J],Ceramics International,2016,41:2863-2868.DOI:10.1016/j. ceramint.2014.10.108.
14	ZHONG S K, WANG Y, WU L ，et al. Synthesis and electrochemical properties of Ti-doped Li3V2(PO4)3/C cathode materials[J].Rare Metals, 2015,34(8): 586-592. DOI: 10.1007/s12598-014-0276-5.
15	LIU L Y, XIAO X, GUO J F, et al. Nanocomposite LiFePO4·Li3V2(PO4)3/C synthesized by freeze-drying assisted sol-gel method and its magnetic and electrochemical properties[J]. Science China Materials, 2017:1-9.DOI: 10.1007/s40843-017-9114-0.
16	YANG G,JIANG C Y,HE X M,et al.Preparation of Li3V2(PO4)3/LiFePO4 composite cathode material for lithium ion batteries[J].Ionics, 2013,19(9):1247-1252. DOI:107/s11581-013-0856-7.
17	XIAO P H,HENKELMAN G.Kinetic monte carlo study of Li intercalation in LiFePO4[J].ACS Nano, 2018,12(1):844-851.DOI:10.1021/acsnano.7b08278.

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锂离子电池LiFePO₄/Li₃V₂(PO₄)₃复合正极材料的制备及性能研究

Preparation and properties of LiFePO₄/Li₃V₂ (PO₄)₃ composite cathode material for lithium-ion batteries

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