期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 60, 期 22, 页码 12539-12546出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202102048
关键词
atomic-scale hybrids; Ge– carbon anodes; lithium-ion batteries; micro– nano porous materials
资金
- National Natural Science Foundation of China [U20A20145, 21805198, 21878195]
- Distinguished Young Foundation of Sichuan Province [20JCQN0197]
- Sichuan Science and Technology Project [2019YFH0149]
- Key R&D Project of Sichuan Provincial Department of Science and Technology [2020YFG0471, 2020YFG0022]
- Sichuan Province Science and Technology Achievement Transfer and Transformation Project [21ZHSF0111]
By selecting a suitable carbon source and introducing an active medium, Ge/carbon doping at the atom level was achieved, leading to excellent electrochemical performance. The Ge/carbon anode maintained a reversible capacity of 1127 mAh g(-1) after 1000 cycles with a retention of 84% compared to the second cycle, while the SEI thickness was only 17.4 nm after 1000 cycles, reflecting the material's application potential.
The continuous growth of the solid-electrolyte interface (SEI) and material crushing are the fundamental issues that hinder the application of Ge anodes in lithium-ion batteries. Solving Ge deformation crushing during discharge/charge cycles is challenging using conventional carbon coating modification methods. Due to the chemical stability and high melting point of carbon (3500 degrees C), Ge/carbon hybridization at the atomic level is challenging. By selecting a suitable carbon source and introducing an active medium, we have achieved the Ge/carbon doping at the atom-level, and this Ge/carbon anode shows excellent electrochemical performance. The reversible capacity is maintained at 1127 mAh g(-1) after 1000 cycles (2 A g(-1) (2-71 cycles), 4 A g(-1) (72-1000 cycles)) with a retention of 84 % compared to the second cycle. The thickness of the SEI is only 17.4 nm after 1000 cycles. The excellent electrochemical performance and stable SEI fully reflect the application potential of this material.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据