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Enhanced electrochemical performance of Li1.2Mn0.54Ni0.13Co0.13O2 prepared by using activated carbon as template and carbon source.

Authors :
Fu, Xin-Yuan
Wang, Ji-Qing
Zhang, Lu-Lu
Li, Tao
Liu, Jing
Yang, Xue-Lin
Source :
Ionics; Sep2020, Vol. 26 Issue 9, p4423-4431, 9p
Publication Year :
2020

Abstract

A novel carbon modified Li<subscript>1.2</subscript>Mn<subscript>0.54</subscript>Ni<subscript>0.13</subscript>Co<subscript>0.13</subscript>O<subscript>2</subscript> has been successfully fabricated by using activated carbon (AC) as template and carbon source via sol-gel method. The AC modified Li<subscript>1.2</subscript>Mn<subscript>0.54</subscript>Ni<subscript>0.13</subscript>Co<subscript>0.13</subscript>O<subscript>2</subscript> (denoted as LLMO@AC) particles with less agglomeration show a nearly spherical structure with a size distribution range of 150~250 nm. As cathode material, such LLMO@AC delivers a significantly enhanced first capacity (245.7 mAh g<superscript>−1</superscript>) with a satisfied capacity retention ratio (87.4%) after 100 cycles at 150 mA g<superscript>−1</superscript>. Even if the current is increased to 1.5 A g<superscript>−1</superscript>, LLMO@AC still owns a high average discharge capacity of 161.1 mAh g<superscript>−1</superscript>. Electrochemical impedance spectroscopy results reveal that the LLMO@AC electrode has lower charge transfer resistance and higher lithium-ion diffusion coefficient compared with pristine LLMO and the LLMO synthesized by directly using glucose as carbon sources (LLMO@G). This work provides an effective modification strategy to improve the electrochemical performance of LLMO and promote the industrialization of LLMO. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
09477047
Volume :
26
Issue :
9
Database :
Complementary Index
Journal :
Ionics
Publication Type :
Academic Journal
Accession number :
145108181
Full Text :
https://doi.org/10.1007/s11581-020-03589-3