Promoting Ge Alloying Reaction via Heterostructure Engineering for High Efficient and Ultra-Stable Sodium-Ion Storage.

ABSTRACT: Germanium (Ge)-based materials have been considered as potential anode materials for sodium-ion batteries owing to their high theoretical specific capacity. However, the poor conductivity and Na⁺ diffusivity of Ge-based materials result in retardant ion/electron transportation and insufficient sodium storage efficiency, leading to sluggish reaction kinetics. To intrinsically maximize the sodium storage capability of Ge, the nitrogen doped carbon-coated Cu₃Ge/Ge heterostructure material (Cu₃Ge/Ge@N-C) is developed for enhanced sodium storage. The pod-like structure of Cu₃Ge/Ge@N-C exposes numerous active surface to shorten ion transportation pathway while the uniform encapsulation of carbon shell improves the electron transportation, leading to en

SUBMITTER: Shang C 

PROVIDER: S-EPMC7675052 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature