SiO<sub>x</sub> Encapsulated in Graphene Bubble Film: An Ultrastable Li-Ion Battery Anode.
basic_science · Level V
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- Record sourced from PubMed, PMID 29744940.
- Also identified by DOI 10.1002/adma.201707430.
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Abstract
SiO<sub>x</sub> is proposed as one of the most promising anodes for Li-ion batteries (LIBs) for its advantageous capacity and stable Li uptake/release electrochemistry, yet its practical application is still a big challenge. Here encapsulation of SiO<sub>x</sub> nanoparticles into conductive graphene bubble film via a facile and scalable self-assembly in solution is shown. The SiO<sub>x</sub> nanoparticles are closely wrapped in multilayered graphene to reconstruct a flake-graphite-like macrostructure, which promises uniform and agglomeration-free distribution of SiO<sub>x</sub> in the carbon while ensures a high mechanical strength and a high tap density of the composite. The composites present unprecedented cycling stability and excellent rate capabilities upon Li storage, rendering an opportunity for its anode use in the next-generation high-energy LIBs.