NDLI: The effects of C-rate on the discharge capacities of LiNi$_{1−y}$M$_{y}$O$

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The effects of C-rate on the discharge capacities of LiNi$_{1−y}$M$_{y}$O$_{2}$ (M=Ni, Ga, Al and/or Ti) cathodes

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The effects of C-rate on the discharge capacities of LiNi$_{1−y}$M$_{y}$O$_{2}$ (M=Ni, Ga, Al and/or Ti) cathodes

Content Provider	Springer Nature Link
Author	Song, Myoung Youp Park, Chan Kee Yoon, Soon Do Park, Hye Ryoung Mumm, Daniel R.
Copyright Year	2009
Abstract	LiNi$_{1−y}$M{y}O{2} specimens with compositions of LiNiO$_{2}$, LiNi$_{0.975}$Ga$_{0.025}$O{2}, LiNi$_{0.975}$Al$_{0.025}$O$_{2}$, LiNi$_{0.995}$Ti$_{0.005}$O$_{2}$ and LiNi$_{0.990}$Al$_{0.005}$Ti$_{0.005}$O$_{2}$ were synthesized by wet milling and solid-state reaction method. All the synthesized samples possessed the α-NaFeO structure of the rhombohedral system (space group; $$R\bar 3m$$ ) with no evidence of any impurities. Among the α-LiNiO$_{2}$ cathodes prepared with the weight ratios of LiNiO$_{2}$: acetylene black: binder = 85≠10≠5, 85≠12≠3 and 90≠7≠3, the cathode with the weight ratio of 85≠10≠5 had the best cycling performance, with a discharge capacity degradation rate of 1.06 mAh/g/cycle and a discharge capacity at n=20 of 143.5 mAh/g. Among all the samples, LiNi$_{0.990}$Al$_{0.005}$Ti$_{0.005}$O$_{2}$ had the highest first discharge capacities at 0.1 C, 0.2 C and 0.5 C rates. That sample had the smallest R-factor value, indicating that it had the lowest degree of cation mixing. Among all the samples, LiNi$_{0.975}$Al$_{0.025}$O$_{2}$ showed the lowest rate of decrease in the first discharge capacity with C rate. The first discharge capacities at 0.1 C, 0.2 C and 0.5 C rates were 170.5 mAh/g, 155.0 mAh/g and 124.2 mAh/g, respectively.
Starting Page	151
Ending Page	155
Page Count	5
File Format	PDF
ISSN	17388090
Journal	Electronic Materials Letters
Volume Number	5
Issue Number	4
e-ISSN	20936788
Language	English
Publisher	Springer Netherlands
Publisher Date	2009-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	LiNi$_{1−y}$M$_{y}$O$_{2}$ (M=Ni, Ga, Al and/or Ti) solid-state reaction method discharge capacity C-rate I$_{003}$/I$_{104}$ R-factor Optical and Electronic Materials Condensed Matter Physics Nanotechnology and Microengineering Characterization and Evaluation of Materials Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials

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