铁钼氧化物电极材料的制备及在锂离子电池中的应用
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摘要
以六水合氯化铁、磷钼酸、氧化石墨烯和富马酸为原料,采用水热法合成Fe_2(MoO_4)_3纳米材料,并将其用作锂离子电池负极材料.探讨不同煅烧温度对样品形貌和锂电性能的影响,利用SEM、XRD和EDS等分析技术对样品的形貌和结构进行表征,并对其进行电化学性能测试.结果表明:Fe_2(MoO_4)_3纳米材料是颗粒状的结构,在煅烧温度为550 ~oC时,制备的样品具有良好的电化学性能,当电流密度为100 mA·g~(-1),首次放电比容量为1 343.5 mAh·g~(-1),循环充放电50次时,放电比容量仍达915 mAh·g~(-1),表现出良好的循环性能和倍率性能.Fe_2(MoO_4)_3负极的首次不可逆容量损失,主要与电解液的分解和SEI膜的形成有关.
Fe_2(MoO_4)_3 nanomaterials were synthesized by hydrothermal method using six hydrated ferric chloride, phosphomo molybdic acid, graphene oxide and fumaric acid as raw materials, and used as anode materials for lithium ion batteries. To investigate the effect of different calcination temperature on the morphology and electrochemical performance, the morphology and structure of the samples were characterized by SEM, XRD and EDS, and the electrochemical properties of the samples were tested. The results show that Fe_2(MoO_4)_3 nanomaterials are granular structures. When the calcining temperature is 550 ℃, the prepared samples have good electrochemical performance; when the current density is 100 mA·g~(-1), the initial discharge specific capacity is 1 343.5 mAh·g~(-1) and after 50 cycles of charging and discharging, the discharge specific capacity is still 915 mAh·g~(-1), which shows good cycling performance and rate performance. The initial irreversible capacity loss of the Fe_2(MoO_4)_3 anode is mainly related to the decomposition of the electrolyte and the formation of the SEI membrane.
Fe_2(MoO_4)_3 nanomaterials were synthesized by hydrothermal method using six hydrated ferric chloride, phosphomo molybdic acid, graphene oxide and fumaric acid as raw materials, and used as anode materials for lithium ion batteries. To investigate the effect of different calcination temperature on the morphology and electrochemical performance, the morphology and structure of the samples were characterized by SEM, XRD and EDS, and the electrochemical properties of the samples were tested. The results show that Fe_2(MoO_4)_3 nanomaterials are granular structures. When the calcining temperature is 550 ℃, the prepared samples have good electrochemical performance; when the current density is 100 mA·g~(-1), the initial discharge specific capacity is 1 343.5 mAh·g~(-1) and after 50 cycles of charging and discharging, the discharge specific capacity is still 915 mAh·g~(-1), which shows good cycling performance and rate performance. The initial irreversible capacity loss of the Fe_2(MoO_4)_3 anode is mainly related to the decomposition of the electrolyte and the formation of the SEI membrane.
引文
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[2]李为立.溶胶凝胶法制备膜支撑凝胶聚合物电解质及其性能研究[J].江苏科技大学学报(自然科学版),2008,22(1):43-47.DOI:10.3969/j.issn.1673-4807.2008.01.010.LI Weili.Novel membrane supporting hybrid gel electrolyte prepared with in-situ sol-gel method[J].Journal of Jiangsu University of Science and Technology(Natural Science Edition),2008,22(1):43-47.DOI:10.3969/j.issn.1673-4807.2008.01.010.(in Chinese)
[3]邢玉金,汤继俊,李斌彤,等.离子型聚合物Poly(MMA-co-maleic Li)的合成及其对基于PEO凝胶聚合物电解质性能影响研究[J].江苏科技大学学报(自然科学版),2013,27(4):337-341.DOI:10.3969/j.issn.1673-4807.2013.04.007.XING Yujin,TANG Jijun,LI Bintong,et al.Study of synthesis ionomer(Poly(MMA-co-maleic acid lithium))and its impact on the properties of PEO-based gel polymer electrolyte[J].Journal of Jiangsu University of Science and Technology(Natural Science Edition),2013,27(4):337-341.DOI:10.3969/j.issn.1673-4807.2013.04.007.(in Chinese)
[4]郑浩,李琳,高虹,等.三维花状Fe2(Mo O4)3微米球的水热制备及电化学性能[J].无机化学学报,2014,30(12):2761-2766.DOI:10.11862/CJIC.2014.374.
[5]CAI D,WANG C,SHI C,et al.Facile synthesis of Nand S co-doped graphene sheets as anode materials for high-performance lithium-ion batteries[J].Journal of Alloys&Compounds,2017,731:235-242.
[6]WU D,SHEN R,YANG R,et al.Mixed molybdenum oxides with superior performances as an advanced anode material for lithium-ion batteries[J].Scientific Reports,2017,7:44697.DOI:10.1038/srep44697.
[7]XIA Q,WANG P,TAN Q.Facile synthesis of MoO3@carbon fibers for high reversible lithium storage[J].Materials Letters,2017,215:221-224.DOI:10.1016/j.matlet.2017.12.058.
[8]谭玉明,侯清麟,陈宪宏,等.不同硫源对锂离子电池负极材料Sb2S3的影响[J].湖南工业大学学报,2017,31(3):58-62.DOI:10.3969/j.issn.1673-9833.2017.03.010.TAN Yuming,HOU Qinglin,CHEN Xianhong,et al.Aresearch on the effects of different sulfur sources on Sb2S3as anode material forlithium ion batteries[J].Journal of Hunan University of Technology,2017,31(3):58-62.DOI:10.3969/j.issn.1673-9833.2017.03.010.(in Chinese)
[9]WANG N,YUAN H,NULI Y,et al.Prelithiation activates Fe2(MoO4)3cathode for rechargeable hybrid Mg2+/Li+batteries[J].Acs Appl Mater Interfaces,2017,9(44):38455-38466.DOI:10.1021/acsami.7b10705.
[10]NGUYEN V T,LIU Y L,HAKIM S A,et al.Synthesis and electrochemical properties of doped tin Fe2(MoO4)3as cathode material for sodium-ion batteries[J].International Journal of Electrochemical Science,2017,12(4):3088-3098.
[11]ZHENG H,WANG S,WANG J,et al.3DFe2(MoO4)3microspheres with nanosheet constituents as high-capacity anode materials for lithium-ion batteries[J].Journal of Nanoparticle Research,2015,17(11):449.DOI:10.1007/s11051-015-3254-4.
[12]NIU Y,XU M.Reduced graphene oxide and Fe2(MoO4)composite for sodium-ion batteries cathode with improved performance[J].Journal of Alloys&Compounds,2016,674:392-398.DOI:10.1016/j.jallcom.2016.02.223.
[13]ARFAOUI A,MHAMDI A,JLIDI D,et al.Physical and ethanol sensing properties of sprayed Fe2(Mo O4)3thin films[J].Journal of Alloys&Compounds,2017,719:392-400.DOI:10.1016/j.jallcom.2017.05.202.
[14]ZHANG D,ZHANG L,ZHANG W,et al.Morphology-dependent electrocatalytic performance of Fe2(MoO4)3for electro-oxidation of methanol in alkaline medium[J].Journal of Materiomics,2017,3(2):135-143.DOI:info:doi/10.1016/j.jmat.2017.03.002.