采用LiOH-LiNO3复合熔盐合成锂离子电池负极材料尖晶石结构Li4Ti5O12,应用XRD、SEM、CV以及恒流充放电测试等手段对所合成材料进行了结构表征和性能测试.结果表明,当反应物中n(Li):n(Ti)=4时合成的样品为纯的尖晶石相Li4Ti5O12,合成所需时间短、熔盐比例低.以电流密度15mA/g进行恒流充放电测试,其首次放电比容量为164.4mAh/g,电压平台宽,平台电压为1.55V.循环15周后放电比容量为156.7mAh/g,容量保持率为95.3%,循环性能优良.
参考文献
| [1] | Du P A;Plitz I;Menocal S et al.[J].Journal of Power Sources,2003,115(01):171-178. |
| [2] | CHOU Kuo-Chih;QIU Weihua;WU Ke;ZHANG Guohua .Kinetics of synthesis of Li_4Ti_5O_(12) through solid-solid reaction[J].are Metals,2006(5):399-406. |
| [3] | Tereza Kostlanova;Jiff Dedecek;Petr Krtil .The effect of the inner particle structure on the electronic structure of the nano-crystalline Li-Ti-O spinels[J].Electrochimica Acta,2007(5):1847-1856. |
| [4] | Abe Y;Matsui E;Senna M .Preparation of phase pure and well-crystallized Li4Ti5O12 nanoparticles by precision control of starting mixture and calcining at lowest possible temperatures[J].The journal of physics and chemistry of solids,2007(5/6):681-686. |
| [5] | 陈宇,何锋,张玉荣.溶液法合成锂离子电池的阴极材料LiZnxNi0.5-xMn1.5O4及其电化学性质研究[J].功能材料,2006(04):653-657. |
| [6] | Hao Y J;Lai Q Y;Lu J Z et al.[J].Journal of Alloys and Compounds,2007,439(1-2):330-336. |
| [7] | Jiang C;Zhou Y;Honma I et al.[J].Journal of Power Sources,2007,166(02):514-518. |
| [8] | Rho YH;Kanamura K .Li+ ion diffusion in Li4Ti5O12 thin film electrode prepared by PVP sol-gel method[J].International Journal of Quantum Chemistry,2004(6):2094-2100. |
| [9] | Hao Y J;Lai Q Y;Lu J Z et al.[J].Journal of Power Sources,2006,158(02):1358-1364. |
| [10] | Kanamura K;Chiba T;Dokko K .[J].Journal of the European Ceramic Society,2006,26(4-5):577-581. |
| [11] | 裴先茹,王晓冬,张顺利,张经纬,杨建军,金振声.熔融法制备纳米管Li-Ti-O化合物及其表征[J].无机化学学报,2006(12):2135-2140. |
| [12] | Kima J H;Myung S T;Sun Y K .[J].Electrochimica Acta,2004,49:219-227. |
| [13] | Liang H Y;Qiu X P;Zhang S C et al.[J].Electrochemistry Communications,2004,6:505-509. |
| [14] | Cheng L;Liu HJ;Zhang JJ;Xiong HM;Xia YY .Nanosized Li4Ti5O12 prepared by molten salt method as an electrode material for hybrid electrochemical supercapacitors[J].Journal of the Electrochemical Society,2006(8):A1472-A1477. |
| [15] | Ohzuku T.;Yamamoto N.;Ueda A. .ZERO-STRAIN INSERTION MATERIAL OF LI[LI1/3TI5/3]O-4 FOR RECHARGEABLE LITHIUM CELLS[J].Journal of the Electrochemical Society,1995(5):1431-1435. |
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