Article: Silicon–Carbon Core–Shell Hollow Nanotubular Configuration High-Performance Lithium-Ion Anodes
The Journal of Physical Chemistry C. 2017 May 11, v. 121, no. 18
2017
Abstract: Silicon anode systems, due to their intrinsic high theoretical specific capacity, show tremendous potential in lithium ion batteries (LIBs). Unfortunately, commercial application still remains elusive due to the cycling-related colossal volume expansion ... ...
| Abstract | Silicon anode systems, due to their intrinsic high theoretical specific capacity, show tremendous potential in lithium ion batteries (LIBs). Unfortunately, commercial application still remains elusive due to the cycling-related colossal volume expansion issues following Li alloying and dealloying. Herein, core–shell C@Si@C hollow nanotubes with optimal Si thickness (∼60 nm) showing no microstructural damage during lithiation and delithiation processes, have been developed as a stable anode for LIBs with low first-cycle irreversible loss (FIR) of ∼13% and high areal capacity (∼3 mAhcm–²) for the first time. The hollow Si nanotubes (h-SiNTs) have been generated via our previously reported high-throughput and recyclable, sacrificial MgO wire template fabrication approach. Generation of Si films of varying thickness by low-pressure thermal chemical vapor deposition (LPCVD) with subsequent etching yields h-SiNTs. Modification/optimization of the h-SiNT physical characteristics exhibit improved performance in LIBs. Carbon coating of optimized h-SiNTs further, yields core–shell h-SiNTs for the first time exhibiting not only low FIR loss of ∼13%, with a specific capacity of ∼1000 mA·h·g–¹ at discharge/charge currents of ∼1 A·g–¹ for over 120 cycles, but also a low fade rate of ∼0.072% loss per cycle. |
|---|---|
| Keywords | anodes ; carbon ; coatings ; lithium batteries ; magnesium oxide ; nanotubes ; physical chemistry ; silicon ; vapors |
| Language | English |
| Dates of publication | 2017-0511 |
| Size | p. 9662-9671. |
| Publishing place | American Chemical Society |
| Document type | Article |
| ISSN | 1932-7455 |
| DOI | 10.1021%2Facs.jpcc.7b00057 |
| Database | NAL-Catalogue (AGRICOLA) |
More links
Kategorien
Order via subito
This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.
Inter-library loan at ZB MED
Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.