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首页> 外文期刊>Applied Surface Science >Li_2MnO_3 stabilized LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2 cathode with improved performance for lithium ion batteries
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Li_2MnO_3 stabilized LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2 cathode with improved performance for lithium ion batteries

机译：Li_2MnO_3稳定的LiNi_（1/3）Co_（1/3）Mn_（1/3）O_2正极，具有改善的锂离子电池性能

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摘要

Li_2MnO_3 stabilized LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2 cathode materials are discussed by xLi_2MnO_3(1-x)LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2 (x=0.3 and 0.7) solid solutions. The solid solutions were synthesized by annealing the mixing LiNO_3, Mn(NO_3)_2 and LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2 powder at 900℃ for 12h, and it was found that the cathode particle size increased from 200-300 to 300-500 nm. The pristine LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2 showed the 30th discharge capacity of 174.5 mAhg~(-1). Our results indicated that the introduction of Li2MnO_3 in the cathode could increase performance. 0.3Li_2MnO_3·0.7LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2 cathode shows higher discharge of 182.0mAhg~(-1) in the 30th cycle. And the discharge capacity of 214.1 mAhg~(-1) was obtained when the Li_2MnO_3 content increased to 0.7. Moreover, the cyclic performance at 55 ℃ was also increased by Li_2MnO_3. For instance, the discharge capacities were 191.2 mAhg~(-1) (x=0.3) and 229.3 mAhg~(-1) (x = 0.7) and the capacity retentions are 94.9% and 91.4% after 40 cycles, respectively. The DFT calculations show that stable Li_2MnO_3-enriched layer is as a result of enhanced performance.
机译：通过xLi_2MnO_3（1-x）LiNi_（1/3）Co_（1/3）Mn_（1/3）讨论了Li_2MnO_3稳定的LiNi_（1/3）Co_（1/3）Mn_（1/3）O_2正极材料O_2（x = 0.3和0.7）固溶体。将LiNO_3，Mn（NO_3）_2和LiNi_（1/3）Co_（1/3）Mn_（1/3）O_2粉末在900℃下混合退火12h，合成固溶体，发现阴极粒径从200-300 nm增加到300-500 nm。原始的LiNi_（1/3）Co_（1/3）Mn_（1/3）O_2的第30次放电容量为174.5 mAhg〜（-1）。我们的结果表明，在阴极中引入Li2MnO_3可以提高性能。 0.3Li_2MnO_3·0.7LiNi_（1/3）Co_（1/3）Mn_（1/3）O_2阴极在第30个循环中显示出182.0mAhg〜（-1）较高的放电率。 Li_2MnO_3含量增加到0.7时，放电容量为214.1 mAhg〜（-1）。此外，Li_2MnO_3还提高了55℃时的循环性能。例如，在40个循环之后，放电容量为191.2mAhg·（-1）（x ＝ 0.3）和229.3mAhg·（-1）（x ＝ 0.7），并且容量保持率分别为94.9％和91.4％。 DFT计算表明，稳定的Li_2MnO_3富集层是增强性能的结果。

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  • 来源
    《Applied Surface Science》 |2013年第ptab期|235-240|共6页
  • 作者

    Jiebin Li; Youlong Xu; Xifei Li; Zhangwei Zhang;

  • 作者单位

    Electronic Material Research Laboratory, Key Laboratory of the Ministry of Education, Xi'an Jiaotong University, No. 28, Xianning West Road, Xi'an,Shaanxi 710049, PR China,Shaanxi Applied Physics and Chemistry Research Institute, Xi'an, Shaanxi 710061, PR China;

    Electronic Material Research Laboratory, Key Laboratory of the Ministry of Education, Xi'an Jiaotong University, No. 28, Xianning West Road, Xi'an,Shaanxi 710049, PR China;

    College of Physics and Electronic Information Science, Tianjin Normal University, Tianjin 300387, China;

    Electronic Material Research Laboratory, Key Laboratory of the Ministry of Education, Xi'an Jiaotong University, No. 28, Xianning West Road, Xi'an,Shaanxi 710049, PR China;

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  • 正文语种 eng
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  • 关键词

    Lithium ion battery; Cathode materials; Solid solution; xLi_2MnO_3·(1-x)LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2;

    机译：锂离子电池;阴极材料;实在的方法;xLi_2MnO_3·（1-x）LiNi_（1/3）Co_（1/3）Mn_（1/3）O_2;

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