Fast-charging high-energy lithium-ion batteries via implantation of amorphous silicon nanolayer in edge-plane activated graphite anodes

As fast-charging lithium-ion batteries turn into increasingly important components in forthcoming applications, various strategies have been devoted to the development of high-rate anodes. However, despite vigorous efforts, the low initial Coulombic efficiency and poor volumetric energy density with...

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Bibliographic Details
Published in:Nature communications 2017-10, Vol.8 (1), p.812-10, Article 812
Main Authors: Kim, Namhyung, Chae, Sujong, Ma, Jiyoung, Ko, Minseong, Cho, Jaephil
Format: Article
Language:English
Subjects:
639/301/299/891
639/4077/4079/891
Amorphous silicon
Anodes
Charging
Density
Electrodes
Energy
Flux density
Graphite
Humanities and Social Sciences
Ion implantation
Ion transport
Lithium
Lithium-ion batteries
multidisciplinary
Rechargeable batteries
Science
Science (multidisciplinary)
Silicon
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Summary:As fast-charging lithium-ion batteries turn into increasingly important components in forthcoming applications, various strategies have been devoted to the development of high-rate anodes. However, despite vigorous efforts, the low initial Coulombic efficiency and poor volumetric energy density with insufficient electrode conditions remain critical challenges that have to be addressed. Herein, we demonstrate a hybrid anode via incorporation of a uniformly implanted amorphous silicon nanolayer and edge-site-activated graphite. This architecture succeeds in improving lithium ion transport and minimizing initial capacity losses even with increase in energy density. As a result, the hybrid anode exhibits an exceptional initial Coulombic efficiency (93.8%) and predominant fast-charging behavior with industrial electrode conditions. As a result, a full-cell demonstrates a higher energy density (≥1060 Wh l −1 ) without any trace of lithium plating at a harsh charging current density (10.2 mA cm −2 ) and 1.5 times faster charging than that of conventional graphite. It is desirable to develop fast-charging batteries retaining high energy density. Here, the authors report a hybrid anode via incorporation of an implanted amorphous silicon nanolayer and edge-plane-activated graphite, which meets both criteria.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-017-00973-y