Effects of surface modification on the cycling stability of LiNi0.8Co0.2O2 electrodes by CeO2 coating
- 1. Division of Chemistry and Molecular Engineering, Korea University, Seoul 136-701 (Korea, Republic of)
- 2. Jilin Institute of Chemical Technology, Jilin 132022 (China)
- 3. Division of Chemistry and Molecular Engineering, Korea University, Seoul 136-701 (Korea, Republic of) and Jilin Institute of Chemical Technology, Jilin 132022 (China)
Description
A high-performance LiNi0.8Co0.2O2 cathode was successfully fabricated by a sol-gel coating of CeO2 to the surface of the LiNi0.8Co0.2O2 powder and subsequent heat treatment at 700 deg C 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
Additional details
Identifiers
- DOI
- 10.1016/j.electacta.2005.01.022;
- PII
- S0013-4686(05)00074-5;
Publishing Information
- Journal Title
- Electrochimica Acta
- Journal Volume
- 50
- Journal Issue
- 18
- Journal Page Range
- p. 3764-3769
- ISSN
- 0013-4686
- CODEN
- ELCAAV
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 38012070
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Descriptors DEI
- CALORIMETRY; CAPACITY; CATHODES; CERIUM OXIDES; COBALT OXIDES; ELECTROCHEMICAL COATING; HEAT TREATMENTS; LITHIUM COMPOUNDS; LITHIUM IONS; NICKEL COMPOUNDS; SCANNING ELECTRON MICROSCOPY; SOL-GEL PROCESS; STABILITY; SURFACE TREATMENTS; SURFACES; SYNTHESIS; TEMPERATURE RANGE 0400-1000 K; X-RAY DIFFRACTION
- Descriptors DEC
- ALKALI METAL COMPOUNDS; CERIUM COMPOUNDS; CHALCOGENIDES; CHARGED PARTICLES; CHEMICAL COATING; COBALT COMPOUNDS; COHERENT SCATTERING; DEPOSITION; DIFFRACTION; ELECTRODES; ELECTRON MICROSCOPY; IONS; MICROSCOPY; OXIDES; OXYGEN COMPOUNDS; RARE EARTH COMPOUNDS; SCATTERING; SURFACE COATING; TEMPERATURE RANGE; TRANSITION ELEMENT COMPOUNDS
Optional Information
- Copyright
- Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.