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超声辅助对共沉淀法制备富锂锰基正极材料Li[Li<sub>0.144</sub>Ni<sub>0.136</sub>Co<sub>0.136</sub>Mn<sub>0.544</sub>]O<sub>2</sub>性能影响的研究
作者:
作者单位:

广西大学物理科学与工程技术学院 广西新型电池材料工程技术研究中心 广西高校新能源材料及相关技术重点实验室 广西有色金属及特色材料加工重点实验室

中图分类号:

TM912.9

基金项目:

国家自然科学基金(61664003,51571065);广西科技重大专项(桂科AA17204063)


Effect of ultrasonic-assisted co-precipitation method for preparing Li-rich materials Li[Li<sub>0.144</sub>Ni<sub>0.136</sub>Co<sub>0.136</sub>Mn<sub>0.544</sub>]O<sub>2</sub>
Author:
  • Jinpeng Xu

    Jinpeng Xu

    Guangxi Key Laboratory for NonferrousSMetal andSFeatured Materials,Guangxi Colleges and Universities Key Laboratory of Novel Energy Materials and Related Technology,Guangxi Novel Battery Materials Research Center of Engineering Technology,School of Physical Science and Technology,Guangxi University
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  • Jingwen Jiang

    Jingwen Jiang

    Guangxi Key Laboratory for NonferrousSMetal andSFeatured Materials,Guangxi Colleges and Universities Key Laboratory of Novel Energy Materials and Related Technology,Guangxi Novel Battery Materials Research Center of Engineering Technology,School of Physical Science and Technology,Guangxi University
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  • Haifu Huang

    Haifu Huang

    Guangxi Key Laboratory for NonferrousSMetal andSFeatured Materials,Guangxi Colleges and Universities Key Laboratory of Novel Energy Materials and Related Technology,Guangxi Novel Battery Materials Research Center of Engineering Technology,School of Physical Science and Technology,Guangxi University
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  • Guangxu Li

    Guangxu Li

    Guangxi Key Laboratory for NonferrousSMetal andSFeatured Materials,Guangxi Colleges and Universities Key Laboratory of Novel Energy Materials and Related Technology,Guangxi Novel Battery Materials Research Center of Engineering Technology,School of Physical Science and Technology,Guangxi University
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  • Xianqing Liang

    Xianqing Liang

    Guangxi Key Laboratory for NonferrousSMetal andSFeatured Materials,Guangxi Colleges and Universities Key Laboratory of Novel Energy Materials and Related Technology,Guangxi Novel Battery Materials Research Center of Engineering Technology,School of Physical Science and Technology,Guangxi University
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  • Wenzheng Zhou

    Wenzheng Zhou

    Guangxi Key Laboratory for NonferrousSMetal andSFeatured Materials,Guangxi Colleges and Universities Key Laboratory of Novel Energy Materials and Related Technology,Guangxi Novel Battery Materials Research Center of Engineering Technology,School of Physical Science and Technology,Guangxi University
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  • Jin Guo

    Jin Guo

    Guangxi Key Laboratory for NonferrousSMetal andSFeatured Materials,Guangxi Colleges and Universities Key Laboratory of Novel Energy Materials and Related Technology,Guangxi Novel Battery Materials Research Center of Engineering Technology,School of Physical Science and Technology,Guangxi University
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  • Dan Huang

    Dan Huang

    Guangxi Key Laboratory for NonferrousSMetal andSFeatured Materials,Guangxi Colleges and Universities Key Laboratory of Novel Energy Materials and Related Technology,Guangxi Novel Battery Materials Research Center of Engineering Technology,School of Physical Science and Technology,Guangxi University
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Affiliation:

Guangxi Key Laboratory for NonferrousSMetal andSFeatured Materials,Guangxi Colleges and Universities Key Laboratory of Novel Energy Materials and Related Technology,Guangxi Novel Battery Materials Research Center of Engineering Technology,School of Physical Science and Technology,Guangxi University

Fund Project:

The National Natural Science Foundation of China (Grant Nos. 61664003and51571065).The Innovation-Driven Development Foundation of Guangxi Province (Grant no. AA17204063)

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    摘要:

    通过超声辅助共沉淀法成功制备了富锂锰基正极电极材料,研究了不同的超声时间对材料形貌、结构和电化学性能的影响。研究发现,超声辅助能够使材料颗粒更加均匀,结构更合理,有利于材料电化学性能的提升。当合成前躯体材料超声时间为8h时,复合材料的放电比容量最好,在0.1C的初始放电比容量为327.8 mAh g<sub>-1</sub>,均高于未超声的复合材料的265.2 mAh g<sub>-1</sub>,1C下循环50圈后放电容量为181.6 mAh g<sub>-1</sub>,保持率为84.8%。通过循环伏安法测试和电化学交流阻抗测试,发现超声后的复合材料还原氧化峰电流更大,电荷转移阻抗更小,具有较好的倍率性能。

    Abstract:

    <sub>: </sub> <sub>The effect of different ultrasonic time on the morphology, structure and electrochemical </sub><sub>performance of </sub><sub>Li-rich materials </sub><sub>Li[Li</sub><sub>0.144</sub><sub>Ni</sub><sub>0.136</sub><sub>Co</sub><sub>0.136</sub><sub>Mn</sub><sub>0.544</sub><sub>]O</sub><sub>2</sub><sub>was </sub><sub>studied by ultrasonic assisted co-precipitation method. </sub><sub>Our </sub><sub>study found that </sub><sub>ultrasonic</sub><sub> can make the materials more uniform, and therefore the structure became more reasonable, which is beneficial to improve the electrochemical performance. The </sub><sub>sample </sub><sub>with 8h ultrasonic</sub><sub>time</sub><sub>shows the best capacity, and the initial discharge specific capacity of 0.1C rate is 327.8 mAh g</sub><sub>-1 </sub><sub>(higher than 265.2 mAh g</sub><sub>-1 </sub><sub>of the sample without </sub><sub>ultrasonic</sub><sub>). The discharge capacity is 181.6 mAh g</sub><sub>-1 </sub><sub>at 1C rate after 50 cycles, with the capacity retention of 84.8%. After the cyclic voltammetry test and the EIS test, it was found that the composite oxide had higher current and reduced charge transfer impedance, and better rate performance.</sub>

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徐金鹏,江靖雯,黄海富,黎光旭,梁先庆,周文政,郭进,黄 丹.超声辅助对共沉淀法制备富锂锰基正极材料Li[Li<sub>0.144</sub>Ni<sub>0.136</sub>Co<sub>0.136</sub>Mn<sub>0.544</sub>]O<sub>2</sub>性能影响的研究[J].稀有金属材料与工程,2019,48(10):3359~3365.[Jinpeng Xu, Jingwen Jiang, Haifu Huang, Guangxu Li, Xianqing Liang, Wenzheng Zhou, Jin Guo, Dan Huang. Effect of ultrasonic-assisted co-precipitation method for preparing Li-rich materials Li[Li<sub>0.144</sub>Ni<sub>0.136</sub>Co<sub>0.136</sub>Mn<sub>0.544</sub>]O<sub>2</sub>[J]. Rare Metal Materials and Engineering,2019,48(10):3359~3365.]
DOI:10.12442/j. issn.1002-185X.20180603

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  • 收稿日期:2018-06-08
  • 最后修改日期:2018-06-22
  • 录用日期:2018-07-31
  • 在线发布日期: 2019-11-01