欢迎登录材料期刊网

材料期刊网

高级检索

通过氧化还原法在室温下制备出球形MnO2前驱体,以LiOH·H2O为锂源,按照一定锂锰摩尔比混合,在750℃下焙烧8h,得到球形尖晶石LiMn2O4.采用X射线衍射和扫描电镜对MnO2和LiMn2O4进行了表征,并对LiMn2O4样品做了充放电性能及循环性能测试.结果表明:合成的样品以球形颗粒存在,粒度大小均匀,分散性和流动性好;首次充放电比容量分别为130.5和128.2 mAh·g-1,充放电效率为98.2%,50次循环后容量保持率为90%,球形LiMn2O4具有较高的比容量和优良的循环性能.

参考文献

[1] Motoharu Saitoh;Mitsuru Sano;Miho Fujita .Studies of Capacity Losses in Cycles and Storages for a Li_(1.1)Mn_(1.9)O_4 Positive Electrode[J].Journal of the Electrochemical Society,2004(1):A17-A22.
[2] Y.M.Hon;H.Y.Chung;K.Z.Fung;M.H.Hon .NMR and FT-IR Investigation of Spinel LiMn_2O_4 Cathode Prepared by the Tartaric Acid Gel Process[J].International Journal of Quantum Chemistry,2001(2):368-376.
[3] Calvin J. Curtis;Jiaxiong Wang;Douglas L. Schulz .Preparation and Characterization of LiMn_2O_4 Spinel Nanoparticles as Cathode Materials in Secondary Li Batteries[J].Journal of the Electrochemical Society,2004(4):A590-A598.
[4] 应皆荣,高剑,姜长印,万春荣,何向明.控制结晶法制备球形锂离子电池正极材料的研究进展[J].无机材料学报,2006(02):291-297.
[5] Ying J R;Jiang C Y;Wan C R .Preparation and characterization of high-density spherical LiCoO2 cathode material for lithium ion batteries[J].Journal of Power Sources,2004,129:264-269.
[6] He XM;Li JJ;Cai Y;Jiang CY;Wan CR .Preparation of spherical spinel LiMn2O4 cathode material for Li-ion batteries[J].Materials Chemistry and Physics,2006(1):105-108.
[7] J.-H. Choy;D.-H. Kim;C.-W. Kwon .Physical and electrochemical characterization of nanocrystalline LiMn_2O_4 prepared by a modified citrate route[J].Journal of Power Sources,1999(1):1-11.
[8] 李嵩,程杰锋,季世军,孙俊才.溶胶凝胶法合成尖晶石型Li1+xMn2-xO4的工艺优化[J].中国有色金属学报,2002(04):729-732.
[9] Chuanyun Wan;Yanna Nuli;Jihua Zhuang .Synthesis of spinel LiMn_2O_4 using direct solid state reaction[J].Materials Letters,2002(3):357-363.
[10] 唐新村,杨幼平,李立清,贾殿赠,黄可龙.LiMn2L(Ac)2热分解制备的尖晶石LiMn2O4及其电化学性能[J].中国有色金属学报,2004(05):871-876.
[11] Xiangming He;Jianjun Li;Yan Cai .Preparation of co-doped spherical spinel LiMn_2O_4 cathode materials for Li-ion batteries[J].Journal of Power Sources,2005(0):216-222.
上一张 下一张
上一张 下一张
计量
  • 下载量()
  • 访问量()
文章评分
  • 您的评分:
  • 1
    0%
  • 2
    0%
  • 3
    0%
  • 4
    0%
  • 5
    0%