Enhanced electrochemical performance of Li1.2Mn0.54Ni0.13Co0.13O2 prepared by using activated carbon as template and carbon source
| Autor: | Lulu Zhang, Tao Li, Xuelin Yang, Xin-Yuan Fu, Ji-Qing Wang, Jing Liu |
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| Rok vydání: | 2020 |
| Předmět: |
Range (particle radiation)
Materials science General Chemical Engineering Diffusion General Engineering General Physics and Astronomy chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Energy storage 0104 chemical sciences Dielectric spectroscopy chemistry Chemical engineering Electrode medicine General Materials Science 0210 nano-technology Carbon Activated carbon medicine.drug |
| Zdroj: | Ionics. 26:4423-4431 |
| ISSN: | 1862-0760 0947-7047 |
| DOI: | 10.1007/s11581-020-03589-3 |
| Popis: | A novel carbon modified Li1.2Mn0.54Ni0.13Co0.13O2 has been successfully fabricated by using activated carbon (AC) as template and carbon source via sol-gel method. The AC modified Li1.2Mn0.54Ni0.13Co0.13O2 (denoted as LLMO@AC) particles with less agglomeration show a nearly spherical structure with a size distribution range of 150~250 nm. As cathode material, such LLMO@AC delivers a significantly enhanced first capacity (245.7 mAh g−1) with a satisfied capacity retention ratio (87.4%) after 100 cycles at 150 mA g−1. Even if the current is increased to 1.5 A g−1, LLMO@AC still owns a high average discharge capacity of 161.1 mAh g−1. Electrochemical impedance spectroscopy results reveal that the LLMO@AC electrode has lower charge transfer resistance and higher lithium-ion diffusion coefficient compared with pristine LLMO and the LLMO synthesized by directly using glucose as carbon sources (LLMO@G). This work provides an effective modification strategy to improve the electrochemical performance of LLMO and promote the industrialization of LLMO. |
| Databáze: | OpenAIRE |
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