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| Improved Method to Synthesize Titanium-Doped Lithium-Ion Battery Ternary Cathode Materials |
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Received:March 20, 2022
Revised:March 28, 2022
Accepted:March 31, 2022
Published Online:June 17, 2022
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| DOI：doi：10.3969/j.issn.1007-7545.2022.07.014 |
| KeyWord:sol-gel method; titanium-doping; Li[Ni1/3Co1/3Mn1/3]0.9Ti0.1O2; electrochemical stability |
| Author | Institution |
| LIU Dong |
东北大学 冶金学院 |
| ZHAO He |
东北大学 冶金学院 |
| LI Zai-yuan |
东北大学 冶金学院 |
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| Abstract: |
| The cathode material Li[Ni1/3Co1/3Mn1/3]0.9Ti0.1O2, which has good crystal structure and electrochemical stability, was synthesized by sol-gel method. The degree of atomic mixing was improved by optimizing the preparation of precursors, so as to achieve the purpose of improving the cyclic stability of materials. The XRD test of the material shows that Li+/Ni2+ mixing degree of the sample is very low, and the TEM image shows that the material has a high degree of crystallinity and an orderly arrangement of atoms, which is beneficial to achieve a larger lithium ion diffusion coefficient. After 200 cycles at a rate of 0.5 C, the capacity retention rate of the material is as high as 84.6%. Compared with undoped LiNi1/3Co1/3Mn1/3O2, which is only 52.0%, the titanium-doped material exhibits excellent electrochemical performance. In addition, the titanium-doped material has better charge-discharge rate performance at 0.1, 0.2, 0.5, 1.0, 2.0 and 5.0 C, which is 164.9, 162.4, 152.4, 142.4, 129.7 and 102.8 mAh/g. The results of this research could provide reference to design lithium-ion battery materials with better electrochemical performance. |
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