Improving the electrochemical performance of a Cr-modified LiNi1/3Co1/3−xCrxMn1/3O2 cathode for lithium-ion batteries
In this report, Cr-modified LiNi1/3Co1/3-xCrxMn1/3O2 was prepared as the cathode for lithium-ion batteries through the sol-gel method using spent lithium-ion batteries as raw matrial, and Cr-modified LiNi1/3Co1/3−xCrxMn1/3O2 cathode exhibited better charge/discharge behaviors and cycling stability t...
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Published in | Materials research express Vol. 6; no. 9 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
IOP Publishing
02.08.2019
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Subjects | |
Online Access | Get full text |
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Summary: | In this report, Cr-modified LiNi1/3Co1/3-xCrxMn1/3O2 was prepared as the cathode for lithium-ion batteries through the sol-gel method using spent lithium-ion batteries as raw matrial, and Cr-modified LiNi1/3Co1/3−xCrxMn1/3O2 cathode exhibited better charge/discharge behaviors and cycling stability than the pristine LiNi1/3Co1/3Mn1/3O2. At 0.2 C, the first discharge capacities of Cr-modified LiNi1/3Co1/3−xCrxMn1/3O2 and pristine LiNi1/3Co1/3Mn1/3O2 were 156.8 mAh g−1 and 136.6 mAh g−1 with Coulomb efficiencies of 91% and 93%, respectively. The discharge capacities of Cr-modified LiNi1/3Co1/3−xCrxMn1/3O2 were 156.8, 151.5, and 145.3 mAh g−1, after 30 cycles at 0.2, 0.5, and 1.0 C, which were 91.5%, 90%, and 88% of their initial discharge capacities, respectively. The superior capacity and cycling performance indicate that the structure of Cr-modified LiNi1/3Co1/3−xCrxMn1/3O2 is very stable, and the results reveal that Cr ion doping effectively suppressed the degree of mixing of Li+/Ni2+ so that a limited amount of Li+ was blocked by Ni2+. |
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Bibliography: | MRX-116307.R1 |
ISSN: | 2053-1591 |
DOI: | 10.1088/2053-1591/ab3476 |