期刊
CERAMICS INTERNATIONAL
卷 44, 期 13, 页码 14995-15000出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2018.05.128
关键词
LiCoO2 nanobricks; Hydrothermal synthesis; Surface Al3+ doping; Rate performance
资金
- National Key Research and Development Plans of China [2016YFB0100400]
- National Natural Science Foundation of China [51474037]
- Hunan Provincial Natural Science Foundation [2018JJ3331]
- Opening Fund of Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research [KLCBTCMR201805]
- Changsha Science and Technology Foundation [log1701049]
- Collaborative Innovation Center of New Chemical Technologies for Environmental Benignity and Efficient Resource Utilization
LiCoO2 nano-particles precursor was synthesized through a mixed-alkalis (LiOH-NaOH) hydrothermal reaction, and finally sintered into LiCoO2 nanobricks with a sickness of similar to 300 nm. This LiCoO2 nanobrick cathode delivered a specific capacity of 131.8 mAh g(-1) at 1 C between 3.0 and 4.2 V and 90% capacity retention after 100 cycles. Those synthesized LiCoO2 nanobricks were further treated by surface Al3+ doping to achieve much enhanced 4.5 V lithium storage capability and cycling stability. EIS results showed the surface Al3+ doping operation can signification decrease the charge-transfer resistances of the LiCoO(2 )cathodes for both before and after cyclings.
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