材料科学
多孔性
碳纤维
制作
碳纳米管
纳米技术
石墨烯
纳米-
作者
Zhiwei Yang,Ting Chen,Dequan Chen,Xinyu Shi,Shan Yang,Yanjun Zhong,Yuxia Liu,Gongke Wang,Benhe Zhong,Yang Song,Zhenguo Wu,Xiaodong Guo
标识
DOI:10.1002/anie.202102048
摘要
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 °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.
科研通智能强力驱动
Strongly Powered by AbleSci AI