Single-crystal LiNi0.5Co0.2Mn0.3O2: a high thermal and cycling stable cathodes for lithium-ion batteries
Single-crystalline LiNi 0.5 Co 0.2 Mn 0.3 O 2 (denoted as SC-523) with micron size had been successfully synthesized through a facile method. Electrochemical impedance spectroscopy and differential scanning calorimetry were carried out to identify the improved electrochemical performance and desired...
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Published in | Journal of materials science Vol. 55; no. 7; pp. 2913 - 2922 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
New York
Springer US
01.03.2020
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | Single-crystalline LiNi
0.5
Co
0.2
Mn
0.3
O
2
(denoted as SC-523) with micron size had been successfully synthesized through a facile method. Electrochemical impedance spectroscopy and differential scanning calorimetry were carried out to identify the improved electrochemical performance and desired thermal stability. Even after 100 cycles, SC-523 still delivered a discharge capacity of 151.1 mA h g
−1
(capacity retention with 90.3%) at 1 C in voltage range from 3.0 to 4.5 V (vs. Li/Li
+
), while polycrystalline spherical LiNi
0.5
Co
0.2
Mn
0.3
O
2
(denoted as PC-523) only exhibited 141.7 mA h g
−1
(capacity retention with 78.4%). Besides, SC-523 shows a higher decomposition temperature of 332.13 °C, 14.61 °C higher than that of PC-523 during the thermal decomposition. Consequently, single-crystalline particles with robust morphological integrity ensure the enhanced cycling stability and thermal stability. |
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ISSN: | 0022-2461 1573-4803 |
DOI: | 10.1007/s10853-019-04133-z |