| 引用本文: | 夏书标,张英杰,董鹏,张雁南.固相法制备锂离子电池正极材料LiNi0.80Co0.15Al0.05O2及其性能研究[J].材料科学与工艺,2014,22(3):124-128.DOI:10.11951/j.issn.1005-0299.20140322. |
| XIA Shubiao,ZHANG Yingjie,DONG Peng,ZHANG Yannan.Synthesis and properties of 0.80Co0.15Al0.05O2 cathode material for Li-ion batteries by solid-state method[J].Materials Science and Technology,2014,22(3):124-128.DOI:10.11951/j.issn.1005-0299.20140322. |
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| 摘要: |
| 利用球型Ni(OH)2、纳米Co3O4和Al(NO3)3, 低温预烧结,固相合成高性能0.80Co0.15Al0.05O2正极材料.通过XRD,SEM对样品进行结构和形貌研究,采用TG对样品进行热分析,结果显示在空气气氛下,该固相合成的0.80Co0.15Al0.05O2材料具有良好的层状结构,反映层状结构的006/012和018/110两组峰分裂明显.CV测试结果显示,样品具有良好的氧化还原性.将样品制备成扣式电池进行充放电测试,540 ℃预烧结12 h,720 ℃烧结26 h样品表现出最佳电化学性.0.2 C倍率下,首次放电容量达到184.5 mAh/g,首次库伦效率为86.6%,测试结果高于传统固相法；1 C倍率充放电,首次放电容量为159.9 mAh/g,50次循环后容量保持率达到96%,样品具有良好的循环性能. |
| 关键词: 锂离子电池 正极材料 0.80Co0.15Al0.05O2 |
| DOI：10.11951/j.issn.1005-0299.20140322 |
| 分类号:TQ174 |
| 基金项目:云南省自然科学基金项目(200680048Ｍ);曲靖师范学院校级基金项目(2010QN003). |
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| Synthesis and properties of 0.80Co0.15Al0.05O2 cathode material for Li-ion batteries by solid-state method |
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XIA Shubiao1,2, ZHANG Yingjie1, DONG Peng1, ZHANG Yannan1
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(1. Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China; 2. Faculty of Chemistry ＆ Chemical Engineering, Qujing Normal University, Qujing 655011, China)
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| Abstract: |
| 0.80Co0.15Al0.05O2 cathode with high property was synthesized by the solid phase method, and spheroidal Ni(OH)2, nano-Co3O4 and Al (NO3)3 was used as raw material. The sample′s structure, morphology and thermal performance was characterized by XRD, SEM and TG. The results indicated that 0.80Co0.15Al0.05O2 cathode materials synthesized at atmosphere had a good layer structure. Two groups of peak 006/012 and 018/110 which reflected the stand of the layered structure were splitting obviously. The CV curves showed that sample had excellent oxidation reducing. Sample preparation into button cell for charging and discharging test showed that at 540 ℃ pre-sintering for 12 h, and at 720 ℃ sintering for 26 h there was the best performance. At 0.2 C ratio, the initial discharge specific capacity reached 184.5 mAh/g and the capacity retention was 86.6%, and initial discharge capacity was 159.9 mAh/g, the capacity retention rate was 96% after 50 times cycles at 1 C ratio charge-discharge. |
| Key words: lithium ion battery cathode material 0.80Co0.15Al0.05O2 |
