采用自蔓延-热处理工艺制备层状正极材料LiCoO2,研究热处理温度和热处理时间及 Li/Co 摩尔比对合成产物中 LiCoO2的纯度、晶体结构及微观形貌的影响。利用 X 射线衍射仪和扫描电镜分析合成产物的相组成及其微观形貌,实验结果表明,制备 Li-CoO2的最佳工艺条件为n(Li)/n(Co)=1.03∶1、n(NH4NO3)/n(Co)=4∶3、n(C6H12N4)/n(Co)=4∶3、热处理温度800℃、热处理时间1.5 h,所得产物中LiCoO2相纯度高达99.25%,且晶体具有较好的层状结构。
In this paper,layered cathode material LiCoO2 were synthesized by self-propagating high temperature synthesis and heat-treatment technology.X-ray diffractometer and scanning electron microscopy (SEM)were used to investigate the effects of annealing temperature,annealing time and the mole ratio of Li to Co on purity, crystal structure and microstructure of LiCoO2 .The results show the optimum condition as followmolar ratio of Li to Co was 1.03∶1,molar ratio of NH4NO3 to Co was 4∶3,molar ratio of C6 H12N4 to Co was 4∶3,annea-ling temperature was 800 ℃ and annealing time was 1.5 h.Under the optimum condition,the percentage of Li-CoO2 phase in the products was as high as 99.25%,and the crystal has good layer structure.
参考文献
| [1] | Li Junxiu.The research progress of rare earth doped cath-ode material lithium cobaltate[J].Science & Technology Association Forum,2009(04):99-100. |
| [2] | Sun Yucheng .The research progress of lithium ion battery cathode material technology[J].Inorganic Salt Industry,2012,44(04):50-54. |
| [3] | Chang S K;Kweon H J;Kim B K et al.Syntheses of Li-CoO2 for cathode materials of secondary batteries from reflux reactions at 130-200 ℃[J].Journal of Power Sources,2002,104:125-131. |
| [4] | Wang Jian;Qi Lu;Ke Ke et al.The structure and electro-chemical properties research of cathode material LiCoO2 prepared by a new synthesis method[J].Chinese Journal of Inorganic Chemistry,2004,20(06):635-640. |
| [5] | Yoon W S;Kim K B .Syntheses of LiCoO2 using acrylic acid and its electrochemical properties for Li secondary batteries[J].Journal of Power Sources,1999,81-82:517-523. |
| [6] | Feng Shenglei;Liang Hui;Wang Kewei et al.The re-search on LiCoO2 prepared by Pechini[J].Journal of Inor-ganic Materials,2005,20(04):976-980. |
| [7] | Li Huacheng;Zhang Faming;Zeng Wenming et al.The performance study of LiCoO2 prepared under different presintering temperature[J].Mining and Metallurgical Engineering,2010,30(06):90-91. |
| [8] | Fu Qiulian;Jiang Xiaoyu;Chen Wenzhe .The crystal struc-ture research of LiCoO2 synthesized by Citric acid sol-gel method[J].SPECTROSCOPY AND SPECTRAL ANALYSIS,2008,28(06):1222-1226. |
| [9] | Zhang Yao;Zhong Zhiyuan;Zhu Min .The effects of depo-sition conditions on the structure and morphology of Li-CoO2 film[J].Functional Materials,2007,38(12):1971-1974. |
| [10] | Xi Xiaoming;Liao Daqian .The electrochemical perform-ance research of LiCoO2 prepared by eterogeneous oxida-tion reduction[J].Mining and Metallurgical Engineer-ing,2013,33(01):97-100. |
| [11] | Santiago EI.;Andrade AVC.;Paiva-Santos CO.;Bulhoes LOS. .Structural and electrochemical properties of LiCoO2 prepared by combustion synthesis[J].Solid state ionics,2003(1/2):91-102. |
| [12] | Kalyan I P;Kalaiselvi N;Muniyandi N .A new solution combustion route to synthesize LiCoO2 and LiMn2 O4[J].Journal of Power Sources,2002,111:232-238. |
| [13] | S. L. Kharatyan;A. G. Merzhanov .Coupled SHS Reactions as a Useful Tool for Synthesis of Materials: An Overview[J].International Journal of Self-Propagating High-Temperature Synthesis,2012(1):59-73. |
| [14] | M. A. Hobosyan;S. L. Kharatyan;H. L. Khachatryan .Combustion Synthesis of Lithium Cobaltate[J].International Journal of Self-Propagating High-Temperature Synthesis,2011(2):107-112. |
| [15] | Ermete A .Lithium loss from lithium cobalt oxide:hexa-gonal Li0.5 Co0.5 O to cubic Li0.065 Co0.935 O phase transi-tion[J].International Journal of Inorganic Materials,2001,3(07):721-726. |
| [16] | Yan Shij ian;Tian Wenhuai;Qi Lu .Crystal structure of LiCoO2 synthesized under different temperature[J].Chi-nese Journal of Inorganic Chemistry,2006,22(02):211-216. |
| [17] | R. Moshtev;P. Zlatilova;V. Manev;K. Tagawa .Synthesis of LiNiO_2 in air atmosphere: X-ray diffraction characterization and electrochemical investigation[J].Journal of Power Sources,1996(1):59-66. |
| [18] | Guilmard M;Rougier A;Grune M et al.Effects of alu-minum on the structural and electrochemical properties of LiNiO2[J].Journal of Power Sources,2003,115(02):305-314. |
| [19] | Li Jiangang;Wan Chunrong;Yang Dongping.Modi-fication research of anode material doped fluorine[J].Journal of Inorganic Materials,2004(06):1298-1306. |
| [20] | Shaju K M;Subba Rao G V;Chowdari B V R et al.Per-formance of layered Li(Ni{sub}(1/3)Co{sub}(1/3)Mn{sub}(1/3[J].Electrochimica Acta,2002,48(02):145-151. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%