Beneficial effect of incorporating Ni-rich oxide and layered over-lithiated oxide into high-energy-density cathode materials for lithium-ion batteries
| Autor: | Peng Dong, Xuesong Huang, Yingjie Zhang, Xue Li, Ding Wang, Jianguo Duan, Zhenping Qiu, G.P. Nayaka |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Composite number Oxide Side reaction Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Ion law.invention chemistry.chemical_compound Coating law Electrical and Electronic Engineering Physical and Theoretical Chemistry Renewable Energy Sustainability and the Environment 021001 nanoscience & nanotechnology Cathode 0104 chemical sciences chemistry Chemical engineering engineering Lithium 0210 nano-technology Layer (electronics) |
| Zdroj: | Journal of Power Sources. 400:341-349 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2018.08.041 |
| Popis: | Layer structured Ni-rich oxides with high energy density suffer from an aggressive side reaction at the deep-charged state, resulting in consequent structure collapse and capacity fading. Herein, a facile modification strategy has been developed by designing electrochemically stable lithium-rich layered oxides as the shell and high-energy-density Ni-rich oxides as the core. Mn2+, Co2+, and Ni2+ solutions are introduced to form Mn0.54Ni0.13Co0.13(OH)1.6, which is homogeneously coated on LiNi0.80Co0.15Al0.05O2 composite. Materials incorporating advantages of Ni-rich oxides and layered over-lithiated oxides are obtained after simple heat treatment. Li1.20Mn0.54Ni0.13Co0.13O2 coating improves the cycling performance of LiNi0.80Co0.15Al0.05O2 pronouncedly even at a high cut-off voltage. 1% layered over-lithiated oxide modified materials show discharge capacities of 196.6, 188.8, and 182.9 mAh g−1 at the rates 0.2, 0.5, and 1 C, respectively, in square full-cells between 2.8 and 4.35 V, and display an improved cycling performance with 82.6% capacity retention during 1000 cycles at 1 C rate. |
| Databáze: | OpenAIRE |
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