In:
Angewandte Chemie, Wiley, Vol. 133, No. 22 ( 2021-05-25), p. 12647-12654
Kurzfassung:
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.
Materialart:
Online-Ressource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v133.22
DOI:
10.1002/ange.202102048
Sprache:
Englisch
Verlag:
Wiley
Publikationsdatum:
2021
ZDB Id:
505868-5
ZDB Id:
506609-8
ZDB Id:
514305-6
ZDB Id:
505872-7
ZDB Id:
1479266-7
ZDB Id:
505867-3
ZDB Id:
506259-7
