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Hydrothermal-assist...
Hydrothermal-assisted synthesis of Li-rich layered oxide microspheres with high capacity and superior rate-capability as a cathode for lithium-ion batteries
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Fan, Jianming (författare)
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Li, Guangshe (författare)
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Luo, Dong (författare)
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visa fler...
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Fu, Chaochao (författare)
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- Li, Qi, 1990 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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Zheng, Jing (författare)
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Li, Liping (författare)
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visa färre...
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(creator_code:org_t)
- 2015
- 2015
- Engelska.
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Ingår i: Electrochimica Acta. - 0013-4686. ; 173, s. 7-16
- Relaterad länk:
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https://research.cha...
Abstract
Ämnesord
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- Li-rich layered oxide materials possess high voltage and high specific capacity, which makes them attractive cathode candidates for lithium-ion batteries. However, they still suffer from a poor rate capability, which seriously blocks their widespread practical applications. In this work, Li(Li0.167Mn0.5Co0.167Ni0.167)O2 microspheres were synthesized by a hydrothermal-assisted method, in which Ni-Co-Mn-based microspherical precursors obtained by a hydrothermal process with polyethylene glycol-600 (PEG-600) as a surfactant were mixed with lithium sources and then sintered to yield the final products. It is found that the as-prepared Li-rich layered oxide microspheres exhibit high discharge capacity and superior rate performance: delivering an initial discharge capacity of 292 mAh g−1 at a current density of 20 mA g−1, 189 mAh g−1 at a current density of 600 mA g−1 and 142 mAh g−1 at a current density of 2000 mA g−1 (10C), which are better than that of the sample as-prepared by co-precipitation method. The high discharge capacity and improved rate-capability were beneficial from the microspheres assembled by uniform primary particles around 250 nm, more reversible redox and better electrode kinetics comparing to that of the co-precipitation sample. The preparation strategy reported here may offer hints for achieving various advanced Li-rich layered composite materials that would be used in high-performance energy storage.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
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