A composite surface configuration towards improving cycling stability of Li-rich layered oxide materials
文献类型：期刊论文
| 作者 | Shi, Zhepu; Gu, Qingwen; Yun, Liang; Wei, Zhining; Hu, Di; Qiu, Bao; Chen, George Zheng; Liu, Zhaoping |
| 刊名 | JOURNAL OF MATERIALS CHEMISTRY A
 |
| 出版日期 | 2021 |
| 卷号 | 9期号:43页码:24426-24437 |
| 关键词 | CATHODE MATERIALS REDOX ACTIVITY ANIONIC REDOX METAL-OXIDES LONG-LIFE LITHIUM VOLTAGE MN NI LI1.2NI0.2MN0.6O2 |
| 英文摘要 | Li-rich layered oxides are promising positive electrode candidates for next-generation high-energy Li-ion batteries. However, they suffer from a severe gas release issue and side reaction-induced surface degradation resulting in significant capacity fade and voltage decay. Herein, this work proposes a composite surface configuration by coordinating the three different structures from Nb/Al surface doping, surface oxygen vacancies and Al2O3 layer via solution coating. A comprehensive characterization provided persuasive evidence that the composite surface configuration not only mitigates oxygen release but also regulates Li+ ion extraction/insertion during cycling. Due to the reduced side reaction and promoted surface stability, a decent specific discharge capacity of about 270 mA h g(-1) at 0.1C between 2.0 and 4.6 V vs. Li+/Li was achieved with 57.0% capacity preservation after 1000 cycles at 1C. Most importantly, a 20 A h pouch cell fabricated with this surface-modified positive electrode and an SGC/Gr-negative electrode delivered 345 W h kg(-1) in specific energy and retained 77.9% of it at 0.2C after 340 cycles. |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/21394]  |
| 专题 | 2021专题_期刊论文 |
| 作者单位 | 1.Qiu, B 2.Liu, ZP (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China. 3.Chen, GZ (corresponding author), Univ Nottingham, Fac Engn, Dept Chem & Environm Engn, Nottingham NG7 2RD, England. |
| 推荐引用方式 GB/T 7714 | Shi, Zhepu,Gu, Qingwen,Yun, Liang,et al. A composite surface configuration towards improving cycling stability of Li-rich layered oxide materials[J]. JOURNAL OF MATERIALS CHEMISTRY A,2021,9(43):24426-24437. |
| APA | Shi, Zhepu.,Gu, Qingwen.,Yun, Liang.,Wei, Zhining.,Hu, Di.,...&Liu, Zhaoping.(2021).A composite surface configuration towards improving cycling stability of Li-rich layered oxide materials.JOURNAL OF MATERIALS CHEMISTRY A,9(43),24426-24437. |
| MLA | Shi, Zhepu,et al."A composite surface configuration towards improving cycling stability of Li-rich layered oxide materials".JOURNAL OF MATERIALS CHEMISTRY A 9.43(2021):24426-24437. |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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