|
|||||
|
|
Comparative study of Li[Ni1/3Co1/3Mn1/3]O2 cathode material synthesized via different synthetic routes for asymmetric electrochemical capacitor applications |
|
| Authors: | J.-H. Yoon H.J. Bang Jai Prakash Y.-K. Sun |
| Affiliation: | aCenter for Information and Communication Materials, Department of Chemical Engineering, Hanyang University, Seoul 133-791, South Korea bDepartment of Chemical and Environmental Engineering, Center for Electrochemical Science and Engineering, Illinois Institute of Technology, 10 West 33rd Street, Chicago, IL 60616, USA |
| Abstract: | Layered Li[Ni1/3Co1/3Mn1/3]O2 cathode materials were synthesized by different synthesis routes using carbonate and hydroxide co-precipitation methods. Physical properties of the prepared Li[Ni1/3Co1/3Mn1/3]O2 varied depending on the synthesis method employed. These materials were applied as a positive electrode to an asymmetric electrochemical capacitor with activated carbon as the negative electrode and the electrochemical properties of the capacitor were studied. Li[Ni1/3Co1/3Mn1/3]O2 prepared by the carbonate co-precipitation exhibited higher capacitance and better rate capability with stable cycling retention over 500 cycles than Li[Ni1/3Co1/3Mn1/3]O2 prepared by the hydroxide co-precipitation. The asymmetric electrochemical capacitor (AEC) cell (AC/Li[Ni1/3Co1/3Mn1/3]O2) had a voltage slope from 0.2 to 2.2 V and delivered a capacity of 60 F g−1 with a capacity retention of 88.4% during 500 cycles based on the overall active materials weight. The leakage current was largely decreased for the asymmetric electrochemical capacitor and the maintained voltage was 84.4% during 3 days. |
| Keywords: | Asymmetric electrochemical capacitor Lithium transition metal oxide Pore size distribution Leakage current Voltage maintenance |
| 本文献已被 ScienceDirect 等数据库收录！ | |