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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:
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

Clc Number:

TM912.9

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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    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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[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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History
  • Received:June 08,2018
  • Revised:June 22,2018
  • Adopted:July 31,2018
  • Online: November 01,2019
  • Published: