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Li_2Fe_(0.5)Mn_(0.5)SiO_4的制备及电化学性能

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Abstract:

以醋酸锂、醋酸锰、纳米二氧化硅和硝酸铁为原料、柠檬酸为络合剂,采用溶胶-凝胶法制备前驱体,利用固相反应法在氮气氛中、650~750℃煅烧前驱体制备Li2Fe0.5Mn0.5SiO4固溶体。用X射线衍射和扫描电镜表征Li2Fe0.5Mn0.5SiO4的结构、形貌和晶粒尺寸。结果表明Li2Fe0.5Mn0.5SiO4结晶良好,具有正交斜方晶型;在700℃合成的Li2Fe0.5Mn0.5SiO4基本无杂相,晶粒细小,尺寸为50~200nm。以制备的Li2Fe0.5Mn0.5SiO4粉体作为正极材料的充放电性能测试结果表明在700℃保温5h制备的正极材料具有较好的电化学性能,在0.05C(16mA/g)进行充放电测试时,其放电容量达到122mAh/g。

References

[1]  TONG Dongge,LAI Qiongyu,WEI Nini,et al.Synthesis of LiCo1/3?Ni1/3Mn1/3O2as a cathode material for lithium ion battery by wa-ter-in-oil emulsion method[J].Mater Chem Phys,2005,94:423-428. [2]PADHI A K,NANJUNDASWAMY K S,GOODENOUGH J B.Phos-pho-olivines as positive-electrode materials for rechargeable lithium batteries[J].J Electronchem Soc,1997,144(4):1188-1194. [3]FEY G T K,HSIAO C L,MURALIDHARAN P.Thermal and electro-chemical behavior of yttria-stabilized zirconia coated LiCoO2during overcharge tests[J].J Power Sources,2009,189:837-840. [4]DOMINKO R,BELE M,KOKALJ A,et al.Li2MnSiO4as a potential Li-battery cathode material[J].J Power Sources,2007,174(2):457-461. [5]DOMINKO R,BELE M,GABEREK M,et al.Structure and elec-trochemical performance of Li2MnSiO4and Li2FeSiO4as potential Li-battery cathode materials[J].Electrochem Commun,2006,8:217-222. [6]NYTéN A,ABOUIMRANE A,ARMAND M,et al.Electrochemical peformance performance of Li2FeSiO4as a new Li-battery cathodematerial[J].Electrochem Commun,2005,7:156-160. [7]LARSSON P,AHUJA P,NYTéN Anton,et al.An ab initio study of the Li-ion battery cathode material Li2FeSiO4[J].Electrochem Commun,2006,8:797-800. [8]GONG Z L,LI Y X,YANG Y.Synthesis and electrochemical per-formance of Li2CoSiO4as cathode material for lithium ion batteries[J].J Power Sources,2007,174(2):524-527. [9]LI Yixiao,GONG Zhengliang,YANG Yong.Synthesis and characteri-zation of Li2MnSiO4/C nanocomposite cathode material for lithium ion batteries[J].J Power Sources,2007,174(2):528-532. [10]POLITAEV V V,PETRENKO A A,NALBANDYAN V B,et al.Crystal structure,phase relations and electrochemical properties of monoclinic Li2MnSiO4[J].J Solid State Chem,2007,180:1045-1050. [11]DOMINKO R.Li2MSiO4(M=Fe and/or Mn)cathode materials[J].J Power Sources,2008,184:462-468. [12]DOMINKO R,ARON I,KODRE A,et al.In-situ XAS study on Li2MnSiO4and Li2FeSiO4cathode materials[J].J Power Sources,2009,189:51-58. [13]LI Liming,GUO Huajun,LI Xinhua,et al.Effects of roasting tempera-ture and modification on properties of Li2FeSiO4/C cathode[J].J Power Sources,2009,189:45-50. [14]WU Shunqing,ZHU Zizhong,YANG Yong,et al.Effects of Na-substitution on structural and electronic properties of Li2CoSiO4cathode material[J].Trans Nonferrous Met Soc China,2009,19:182-186. [15]张宝,李新海,罗文斌,等.LiFe1-xMgxPO4锂离子电池正极材料的电化学性能[J].中南大学学报,2006,6:1094-1097.ZHANG Bao,LI Xinhai,LUO Wenbin,et al.J Cent South Univ(Sci Technol,in Chinese),2006,6:1094-1097. [16]ARICòA S,BRUCE P,SCROSATI B,et al.Nanostructured materials for advanced energy conversion and storage devices[J].Nat Mater,2005,4:366-377. [17]YANG Shoufeng,SONG Yanning,ZAVALIJ P Y,et al.Reactivity,stability and electrochemical behavior of lithium iron phosphate[J].Electrochem Commun,2002,4(3):239-244.

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