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Coupled artificial mixed conductor interfaces boosts excess Li-storage capability and ultra-long cycle durability in Si composite
作者:HN Yang, WQ Kong, JP Yin, W Feng, SF Xu, LY Cui, ZS Wen*
關鍵字:Heterogeneous interface, Job-sharing mode, Silicon anode, Lithium-ion battery
論文來源:期刊
具體來源:Surfaces and Interfaces
發(fā)表時間:2021年

It is a critical challenge for silicon to achieve fast lithium storage for the intrinsic sluggish kinetics in spite of an attractive theoretic capacity up to 4200 mAh g?1. In this study, mixed conductor double layers composed of heterogeneous SnO: carbon and Si: carbon interfaces are conceived and configured successfully on the surface of silicon to construct SnO/C@Si composite. Amazing excess Li-storage on interface combined with bulk storage is thus strategically obtained by the coupled job-sharing modes in the artificial interfaces. Outstanding surfacial pseudocapacitive effect, which is hardly mentioned in the modification of silicon electrode materials, is demonstrated in the constructed SnO/C@Si composite. The approach demonstrates that constructing artificial interfaces with coupled job-sharing mode opens a feasible way for alloy-type materials to meet the requirement of fast kinetics and capacity enhancement.


https://authors.elsevier.com/a/1dkA%7E8nATZTkb5

https://doi.org/10.1016/j.surfin.2021.101435

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