Tuning Co/O Redox Chemistry via Fermi Level Regulation for Stable High-Voltage LiCoO2
文献类型：期刊论文
| 作者 | Wen, MP; Kong, WJ; Zhang, JC ; Zhang, QH; Yin, W; Zhang, N; Chai, K; Yu, Y; Chen, HC; Liu, XF
|
| 刊名 | ACS ENERGY LETTERS
 |
| 出版日期 | 2022 |
| 卷号 | 7期号:12页码:4185-4189 |
| ISSN号 | 2380-8195 |
| DOI | 10.1021/acsenergylett.2c01841 |
| 文献子类 | Article |
| 英文摘要 | LiCoO2 (LCO) is ideal for 3C electronics due to its high tap density. However, the excessive O -> Co charge transfer at high delithiation leads to irreversible Co reduction, O release, and structural degradation, deteriorating the high-voltage performance of LCO. Herein, we propose to regulate the intrinsic Fermi level via uneven trace Zr/Mg doping. First, the increase of electron density in the Fermi level mitigates both the O oxidation/coupled Co reduction through alleviating the O -> Co charge transfer, restraining the formations of Co2+ and O-2. This elevates Co redox activity and reduces O redox activity. In addition, the structural evolution of the cathode at delithiation is simplified. The modulated LCO delivers a high discharge capacity and a high cycling stability with 4.5 and 4.6 V ceilings. This study sheds new light on the modulation of Co/O redox chemistry and the reliable large-scale production of high-voltage LiCoO2. |
| 语种 | 英语 |
| WOS记录号 | WOS:000879516000001 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/299085]  |
| 专题 | 高能物理研究所_东莞分部 高能物理研究所_多学科研究中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Wen, MP,Kong, WJ,Zhang, JC,et al. Tuning Co/O Redox Chemistry via Fermi Level Regulation for Stable High-Voltage LiCoO2[J]. ACS ENERGY LETTERS,2022,7(12):4185-4189. |
| APA | Wen, MP.,Kong, WJ.,Zhang, JC.,Zhang, QH.,Yin, W.,...&Liu, XF.(2022).Tuning Co/O Redox Chemistry via Fermi Level Regulation for Stable High-Voltage LiCoO2.ACS ENERGY LETTERS,7(12),4185-4189. |
| MLA | Wen, MP,et al."Tuning Co/O Redox Chemistry via Fermi Level Regulation for Stable High-Voltage LiCoO2".ACS ENERGY LETTERS 7.12(2022):4185-4189. |
入库方式： OAI收割
来源：高能物理研究所
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