Abstract
As one of the fastest-growing cathode materials, Nickel-rich layered cathode material has caused much attention in the “next-generation” Li-ion batteries (LIBs) owning to the high specific energy, high operating potential and long cycling life. However, it still encounters a great of complications to realize the improvement of poor cycle stability and structural defects. In an effort to emphatically investigate the obvious advantages of eco-friendly and low-cost W doping cathode material on the crystalline morphology and electrochemical properties, LiNi0.65−xCo0.15Mn0.20WxO2 (x = 0.5%, 1.0%, 2.0%) were synthesized by hydroxide coprecipitation and calcination crystallization method. Especially, when the amount of W is 1.0% molar ratio, the initial discharge capacity reaches 216.55 mAh g−1 and achieves a capacity retention of 95.95% after 100 cycles with the operation voltage of 2.7–4.4 V at 1C. The reliable results show that the primary particle size via doping appropriate content of W become significantly smaller which can effectively consolidate the stability of the crystal cathode material and improve the recycling performance evidently. In addition, the element of W was detected in the lattice of the crystal particle, which bring about somewhat increase of lattice spacing and expands the Li+ diffusion channels during charge/discharge cycles. This work provides a potential application prospect by the strategy of W modification in the cathode materials of micron-sized particles for efficient lithium-ion batteries.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Hebei Province
Youth Foundation of Natural Science Foundation of Hebei Province
Publisher
The Electrochemical Society
Subject
Materials Chemistry,Electrochemistry,Surfaces, Coatings and Films,Condensed Matter Physics,Renewable Energy, Sustainability and the Environment,Electronic, Optical and Magnetic Materials
Cited by
1 articles.
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