Journal
CERAMICS INTERNATIONAL
Volume 43, Issue 16, Pages 13845-13852Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2017.07.107
Keywords
Composites; Cathode; Lithium-ion batteries; Doping
Categories
Funding
- National Key Research and Development Program of China [2016YFB0100100]
- Strategic Priority Research Program of the Chinese Academy of Sciences (CAS) [XDA09010101]
- Science and Technology Service Network Initiative of the Chinese Academy of Science [KFJEWSTS110]
- Cooperation of the Chinese Academy of Science and the United States Department of Energy (CAS-DOE) [174433KYSB20150047]
Ask authors/readers for more resources
Despite the promising high energy density, Li-rich layered oxides still suffer from capacity fade and voltage decay during prolonged cycling. Doping could be effective in addressing such problems, but current studies pay less attention on rhombohedral phases. To this end, Al incorporated Li-1.14(Ni0.136Co0.10Al0.03Mn0.544)O-2 oxides are investigated. Rietveld refined X-ray diffraction and transmission electron microscope results, along with electrochemical analyses, prove the substitution of Al for Co as well as its influence mainly on rhombohedral components. With slight capacity decreases, Al doped cathodes attain superior cycling performances, presenting a capacity retention up to 94.7% as compared to 81.7% for the pristine ones after 100 cycles. Most importantly, the fatal voltage decay, is alleviated as well through the obstructed formation of spinel-like phases, which are confirmed by the ex-situ XRD and further estimated by Raman spectra. Additionally, interfaces of Al doped electrodes are also somewhat enhanced as indicated by the electrochemical impedance study. These results suggest a notable stabilization effects on host framework in Li-rich layered oxides through manipulations on rhombohedral phases.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available