Synthesis and Characterization of LiNi0.7–xMgxCo0.3O2 (0≤x≤0.1) Cathode Materials for Lithium-Ion Batteries Prepared by a Sol-Gel Method
Prospective cathode materials LiNi0.7–xMgxCo0.3O2 (0≤x≤0.1) for a lithium-ion secondary battery were synthesized using a sol-gel method. The structural and electrochemical properties were examined by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), cyclic voltammetry(CV), and ch...
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Wiley
2014-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2014/746341 |
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| author | Hailang Zhang |
| author_facet | Hailang Zhang |
| author_sort | Hailang Zhang |
| collection | DOAJ |
| description | Prospective cathode materials LiNi0.7–xMgxCo0.3O2 (0≤x≤0.1) for a lithium-ion secondary battery were synthesized using a sol-gel method. The structural and electrochemical properties were examined by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), cyclic voltammetry(CV), and charge-discharge tests. The results show that the LiNi0.7–xMgxCo0.3O2 maintains the α-NaFeO2 type layered structure regardless of the magnesium content in the range x⩽0.1. On the other hand, Mg-doping improves the capacity retention well. Besides, the Mg-doping promotes the diffusion of Li+ in LiNi0.7Co0.3O2. Moreover, Mg-doping suppresses the phase transitions that usually occur in LiNiO2 during cycling and improves the charge-discharge reversibility of Li/LiNi0.7Co0.3O2. High temperature cycling performance of the cathode at 55.5°C is also improved by Mg-doping, which is possibly attributed to the total stronger metal-oxygen bonding and the enhanced structure stability of those delithiated Mg-doped cathodes during cycling. |
| format | Article |
| id | doaj-art-6118364349984047955d42c34424f9e9 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
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| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-6118364349984047955d42c34424f9e92025-02-03T05:45:58ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422014-01-01201410.1155/2014/746341746341Synthesis and Characterization of LiNi0.7–xMgxCo0.3O2 (0≤x≤0.1) Cathode Materials for Lithium-Ion Batteries Prepared by a Sol-Gel MethodHailang Zhang0College of Chemistry and Material Engineering, Jiangnan University, Wuxi 214122, ChinaProspective cathode materials LiNi0.7–xMgxCo0.3O2 (0≤x≤0.1) for a lithium-ion secondary battery were synthesized using a sol-gel method. The structural and electrochemical properties were examined by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), cyclic voltammetry(CV), and charge-discharge tests. The results show that the LiNi0.7–xMgxCo0.3O2 maintains the α-NaFeO2 type layered structure regardless of the magnesium content in the range x⩽0.1. On the other hand, Mg-doping improves the capacity retention well. Besides, the Mg-doping promotes the diffusion of Li+ in LiNi0.7Co0.3O2. Moreover, Mg-doping suppresses the phase transitions that usually occur in LiNiO2 during cycling and improves the charge-discharge reversibility of Li/LiNi0.7Co0.3O2. High temperature cycling performance of the cathode at 55.5°C is also improved by Mg-doping, which is possibly attributed to the total stronger metal-oxygen bonding and the enhanced structure stability of those delithiated Mg-doped cathodes during cycling.http://dx.doi.org/10.1155/2014/746341 |
| spellingShingle | Hailang Zhang Synthesis and Characterization of LiNi0.7–xMgxCo0.3O2 (0≤x≤0.1) Cathode Materials for Lithium-Ion Batteries Prepared by a Sol-Gel Method Advances in Materials Science and Engineering |
| title | Synthesis and Characterization of LiNi0.7–xMgxCo0.3O2 (0≤x≤0.1) Cathode Materials for Lithium-Ion Batteries Prepared by a Sol-Gel Method |
| title_full | Synthesis and Characterization of LiNi0.7–xMgxCo0.3O2 (0≤x≤0.1) Cathode Materials for Lithium-Ion Batteries Prepared by a Sol-Gel Method |
| title_fullStr | Synthesis and Characterization of LiNi0.7–xMgxCo0.3O2 (0≤x≤0.1) Cathode Materials for Lithium-Ion Batteries Prepared by a Sol-Gel Method |
| title_full_unstemmed | Synthesis and Characterization of LiNi0.7–xMgxCo0.3O2 (0≤x≤0.1) Cathode Materials for Lithium-Ion Batteries Prepared by a Sol-Gel Method |
| title_short | Synthesis and Characterization of LiNi0.7–xMgxCo0.3O2 (0≤x≤0.1) Cathode Materials for Lithium-Ion Batteries Prepared by a Sol-Gel Method |
| title_sort | synthesis and characterization of lini0 7 xmgxco0 3o2 0≤x≤0 1 cathode materials for lithium ion batteries prepared by a sol gel method |
| url | http://dx.doi.org/10.1155/2014/746341 |
| work_keys_str_mv | AT hailangzhang synthesisandcharacterizationoflini07xmgxco03o20x01cathodematerialsforlithiumionbatteriespreparedbyasolgelmethod |