LiFePO4的前驱体制备与性能

功能材料, 2008, 39(4): 614-617.

LiFePO4的前驱体制备与性能

王志兴 ^1, , 伍凌 ^2, , 李新海 ^3, , 胡启阳 ^4, , 郭华军 ^5, , 彭文杰 ^6, , 张云河 ^7,

1.中南大学,冶金科学与工程学院,湖南,长沙,410083

2.中南大学,冶金科学与工程学院,湖南,长沙,410083

3.中南大学,冶金科学与工程学院,湖南,长沙,410083

4.中南大学,冶金科学与工程学院,湖南,长沙,410083

5.中南大学,冶金科学与工程学院,湖南,长沙,410083

6.中南大学,冶金科学与工程学院,湖南,长沙,410083

7.中南大学,冶金科学与工程学院,湖南,长沙,410083

基金项目: 国家自然科学基金(50302016) 国家重点基础研究发展计划(973计划)(2007CB613607)

关键词：锂离子电池 , 控制结晶法 , 多孔FePO4·xH2O , 碳热还原 , LiFePO4/C

Preparation of precursor and performance of LiFePO4

以Fe2(SO4)3、H3PO4和NH3·H2O为原料,采用控制结晶法制备了多孔的前驱体FePO4·xH2O.通过研究pH值和合成时间对前驱体的物相结构、成分、表面形貌、粒度、比表面积和振实密度的影响,发现在pH=2.1的条件下反应8h制备的前驱体性能最佳.将前驱体、Li2CO3及葡萄糖均匀混合,用碳热还原法合成了LiFePO4/C,结果表明,以pH=2.1时制备的前驱体为原料合成的LiFePO4/C在0.1C时的首次放电比容量为156mAh/g,其振实密度高达1.20g/cm3.

参考文献

[1]	Padhi AK.;Goodenough JB.;Nanjundaswamy KS. .PHOSPHO-OLIVINES AS POSITIVE-ELECTRODE MATERIALS FOR RECHARGEABLE LITHIUM BATTERIES[J].Journal of the Electrochemical Society,1997(4):1188-1194.
[2]	Padhi AK.;Masquelier C.;Okada S.;Goodenough JB.;Nanjundaswamy KS. .EFFECT OF STRUCTURE ON THE FE3+/FE2+ REDOX COUPLE IN IRON PHOSPHATES[J].Journal of the Electrochemical Society,1997(5):1609-1613.
[3]	Andersson A S;Thomas J O .[J].Journal of Power Sources,2001,97-98:498-502.
[4]	A. Yamada;S. C. Chung;K. Hinokuma .Optimized LiFePO{sub}4 for lithium battery cathodes[J].Journal of the Electrochemical Society,2001(3):A224-A229.
[5]	Franger S;LeCras F;Bourbon C et al.[J].Journal of Power Sources,2003,119-121:252-257.
[6]	Takahashi M;Tobishima S;Takei K et al.[J].Journal of Power Sources,2001,97-98:508-511.
[7]	Croce F;Epifanio A D;Hassoun J et al.[J].Electrochemical and Solid-State Letters,2002,5(03):A47-A50.
[8]	Piana M;Cushing B L;Goodenough J B et al.[J].Solid State Ionics,2004,175(1-4):233-237.
[9]	Miran G;Robert D;Marjan B et al.[J].Solid State Ionics,2005,176(19-22):1801-1805.
[10]	郑绵平;文衍宣 .[P].CN 03102665,2003-07-23.
[11]	Shoufeng Y;Peter Y Z;Whittinggham M S .[J].Electrochemistry Communications,2001,3(09):505-508.
[12]	Tucker M C;Doefff M M;Richardson T J et al.[J].Electrochemical and Solid-State Letters,2002,5(05):A95-A98.
[13]	Park K S;Son J T;Chung H T et al.[J].Electrochemistry Communications,2003,5(10):839-842.
[14]	Higuchi M;Katayama K;Azuma Y et al.[J].Journal of Power Sources,2003,119-121:258-261.
[15]	Prosini P P;Lisi M;Scaccia S et al.[J].Journal of the Electrochemical Society,2002,149:A297-A301.
[16]	Silvera Scaccia;Maria Carewska;Pawel Wisniewski;Pier Paolo Prosini .Morphological investigation of sub-micron FePO_4 and LiFePO_4 particles for rechargeable lithium batteries[J].Materials Research Bulletin: An International Journal Reporting Research on Crystal Growth and Materials Preparation and Characterization,2003(7):1155-1163.
[17]	Andersson AS.;Eyob P.;Aernout D.;Haggstrom L.;Thomas JO.;Kalska B. .Lithium insertion into rhombohedral Li3Fe2(PO4)(3)[J].Solid state ionics,2001(1/2):63-70.

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