Journal
NANO ENERGY
Volume 35, Issue -, Pages 370-378Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2017.04.005
Keywords
Li-rich layered oxide; Stability; Cathode; Lithium-ion battery
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Funding
- Innovation and Technology Fund of the Hong Kong Special Administrative Region [ITS/161/16FP]
- Hong Kong University of Science and Technology
- NSFC [21621091]
- U.S. Department of Energy [DE-AC0206CH11357]
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Rational and precise control of the structure and dimension of electrode materials is an efficient way to improve their electrochemical performance. In this work, solvothermal or co-precipitation method is used to synthesize lithium-rich layered oxide materials of Li1.2Mn0.56Co0.12Ni0.12O2 (LLO) with various morphologies and structures, including microspheres, microrods, nanoplates, and irregular nanoparticles. These materials exhibit strong structure- dependent electrochemical properties. The porous hierarchical structured LLO microrods exhibit the best performance, delivering a discharge capacity of 264.6 mAh g(-1) at 0.5 C with over 91% retention after 100 cycles. At a high rate of 5 C, a high discharge capacity of 173.6 mAh g(-1) can be achieved. This work reveals the relationship between the morphologies and electrochemical properties of LLO cathode materials, and provides a feasible approach to fabricating robust and high-performance electrode materials for lithium-ion batteries.
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