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Enhanced Structural Stability and Electrochemical Performance of $LiNi_{0.6}Co_{0.2}Mn_{0.2}O_{2}$ Cathode Materials by Ga Doping
| Content Provider | MDPI |
|---|---|
| Author | Liu, Zhibei Li, Jiangang Zhu, Meijie Wang, Li Kang, Yuqiong Dang, Zhaohan Yan, Jiasen He, Xiangming |
| Copyright Year | 2021 |
| Description | Structural instability during cycling is an important factor affecting the electrochemical performance of nickel-rich ternary cathode materials for Li-ion batteries. In this work, enhanced structural stability and electrochemical performance of LiNi0.6Co0.2Mn0.2O2 cathode materials are achieved by Ga doping. Compared with the pristine electrode, Li[Ni0.6Co0.2Mn0.2]0.98Ga0.02O2 electrode exhibits remarkably improved electrochemical performance and thermal safety. At 0.5C rate, the discharge capacity increases from 169.3 mAh g−1 to 177 mAh g−1, and the capacity retention also rises from 82.8% to 89.8% after 50 cycles. In the charged state of 4.3 V, its exothermic temperature increases from 245.13 °C to more than 271.24 °C, and the total exothermic heat decreases from 561.7 to 225.6 J·g−1. Both AC impedance spectroscopy and in situ XRD analysis confirmed that Ga doping can improve the stability of the electrode/electrolyte interface structure and bulk structure during cycling, which helps to improve the electrochemical performance of LiNi0.6Co0.2Mn0.2O2 cathode material. |
| Starting Page | 1816 |
| e-ISSN | 19961944 |
| DOI | 10.3390/ma14081816 |
| Journal | Materials |
| Issue Number | 8 |
| Volume Number | 14 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-04-07 |
| Access Restriction | Open |
| Subject Keyword | Materials Electrochemistry Lithium Ion Batteries Cathode Material Lini0.6co0.2mn0.2o2 Ga Doping Structural Stability |
| Content Type | Text |
| Resource Type | Article |
