Effects of surface modification on the cycling stability of LiNi0.8Co0.2O2 electrodes by CeO2 coating
A high-performance LiNi0.8Co0.2O2 cathode was successfully fabricated by a solgel coating of CeO2 to the surface of the LiNi0.8Co0.2O2 powder and subsequent heat treatment at 700 DGC for 5 h. The surface-modified and pristine LiNi0.8Co0.2O2 powders were characterized by X-ray diffraction (XRD), scan...
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| Veröffentlicht in: | Electrochimica acta 2005-06, Vol.50 (18), p.3764-3769 |
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| container_issue | 18 |
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| container_title | Electrochimica acta |
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| creator | HA, Hyung-Wook KYUNG HEE JEONG NAN JI YUN MING ZI HONG KIM, Keon |
| description | A high-performance LiNi0.8Co0.2O2 cathode was successfully fabricated by a solgel coating of CeO2 to the surface of the LiNi0.8Co0.2O2 powder and subsequent heat treatment at 700 DGC for 5 h. The surface-modified and pristine LiNi0.8Co0.2O2 powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), slow rate cyclic voltammogram (CV), and differential scanning calorimetry (DSC). Unlike pristine LiNi0.8Co0.2O2, the CeO2-coated LiNi0.8Co0.2O2 cathode exhibits no decrease in its original specific capacity of 182 mAh/g (versus lithium metal) and excellent capacity retention (95% of its initial capacity) between 4.5 and 2.8 V after 55 cycles. The results indicate that the surface treatment should be an effective way to improve the comprehensive properties of the cathode materials for lithium ion batteries. |
| doi_str_mv | 10.1016/j.electacta.2005.01.022 |
| format | Article |
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The surface-modified and pristine LiNi0.8Co0.2O2 powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), slow rate cyclic voltammogram (CV), and differential scanning calorimetry (DSC). Unlike pristine LiNi0.8Co0.2O2, the CeO2-coated LiNi0.8Co0.2O2 cathode exhibits no decrease in its original specific capacity of 182 mAh/g (versus lithium metal) and excellent capacity retention (95% of its initial capacity) between 4.5 and 2.8 V after 55 cycles. 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| source | Elsevier ScienceDirect Journals |
| subjects | Applied sciences Direct energy conversion and energy accumulation Electrical engineering. Electrical power engineering Electrical power engineering Electrochemical conversion: primary and secondary batteries, fuel cells Exact sciences and technology |
| title | Effects of surface modification on the cycling stability of LiNi0.8Co0.2O2 electrodes by CeO2 coating |
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