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- Title
高镍三元正极材料的制备及其电化学性能.
- Authors
张桂芳; 白玉然; 孙 雨; 时志强
- Abstract
In order to develop a more efficient and simple preparation process for postive electrode materials of power batteries, the transition metal acetate precursors (n(Ni): n(Co): n(Mn) = 8 : 1 : 1, molar ratio) were prepared by spray drying method using soluble metal salts as raw materials. The high nickel ternary cathode material LiNi0.8Co0.1Mn0.1O2 (NCM811) was prepared by the optimizing calcining process. TG was used to investigate the physicochemical changes of precursors during calcination; the morphology and crystal structure of the precursor and calcined product were characterized by SEM and XRD; the lithium storage performance was tested by constant current charge discharge method, rate method and cyclic voltammetry. The results show that the cathode material calcined at 800 益 for 6 h has good morphology and low Li+/Ni2+ mixing degree; the capacity retention rate is over 83% after 300 charge discharge cycles, which has excellent electrochemical performance. The spray drying method provides an efficient preparation process for the ternary cathode materials.
- Publication
Journal of Tiangong University, 2023, Vol 42, Issue 4, p52
- ISSN
1671-024X
- Publication type
Article
- DOI
10.3969/j.issn.1671-024x.2023.04.008