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Title: Core-shell Si@TiO2 nanosphere anode by atomic layer deposition for Li-ion batteries

Journal Article · · Journal of Power Sources
 [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Silicon (Si) is regarded as next-generation anode for high-energy lithium-ion batteries (LIBs) due to its high Li storage capacity (4200 mA h g-1). However, the mechanical degradation and resultant capacity fade critically hinder its practical application. In this regard, we demonstrate that nanocoating of Si spheres with a 3 nm titanium dioxide (TiO2) layer via atomic layer deposition (ALD) can utmostly balance the high conductivity and the good structural stability to improve the cycling stability of Si core material. The resultant sample, Si@TiO2-3 nm core–shell nanospheres, exhibits the best electrochemical performance of all with a highest initial Coulombic efficiency and specific charge capacity retention after 50 cycles at 0.1C (82.39% and 1580.3 mA h g-1). In addition to making full advantage of the ALD technique, we believe that our strategy and comprehension in coating the electrode and the active material could provide a useful pathway towards enhancing Si anode material itself and community of LIBs.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1261354
Alternate ID(s):
OSTI ID: 1341177
Journal Information:
Journal of Power Sources, Vol. 308; ISSN 0378-7753
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 87 works
Citation information provided by
Web of Science

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Cited By (8)

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Recent Progresses and Development of Advanced Atomic Layer Deposition towards High-Performance Li-Ion Batteries journal October 2017