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ۼ : 13-06-19 17:52
[13.06]ö -Catalyst-free Direct Growth of a Single to a Few Layers of Graphene on a Germanium Nanowire for the Anode Material of a Lithium Battery
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ȸ : 1,276  

Catalyst-free Direct Growth of a Single to a Few Layers of Graphene on a Germanium Nanowire for the Anode Material of a Lithium Battery
-Hyungki Kim.; Yoonkook Son.; Chibeom Park.; Jaephil Cho*.; Hee Cheul Choi.*

Germanium nanowire (Ge NW) is one of the promising anode materials for high rate lithium (Li) ion battery due to its high specific capacity (1600 mAhg-1) and fast Li ion diffusivity. Similar to silicon (Si) NW, however, Ge NW shows poor cyclability due to large volume expansion accompanied during lithiation-delithiation process. Herein we demonstrate that single to few layer high quality graphene grows directly on Ge NW (Gr@Ge NW) by chemical vapor deposition process without using conventional metal catalyst, and the Gr@Ge NW exhibits significantly enhanced cycle life (200 cycles) and specific capacity (1059 mAhg-1) at high C-rate (4.0 C). The increased performance is attributed to tight encapsulation of Ge NW with high quality graphene that can suppress volume expansion and accomplish high electrical conductivity during long cycles.


 
 

Total 73
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28 [13.06]ö -Catalyst-free Direct Growth of a Single to a Few Layers of Graphene on a Germanium Nanowire for the Anode Material of a Lithium Battery 06-19 1277
27 [13.4]⹮ -Free-Standing, Single-Monomer-Thick Two-Dimensional Polymers through Covalent Self-Assembly in Solution 11-25 1150
26 [13.3]⹮ -Supramolecular Velcro for Reversible Underwater Adhesion 11-25 1083
25 [13.01] -Active Role of Proton in Excited State Intramolecular Proton Transfer Reaction 06-19 1374
24 [13.01]μ -Reversible and Cyclical Transformations between Solid and Hollow Nanostructures in Confined Reactions of Manganese Oxide and Silica within Nanosized Spheres 02-06 1556
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21 [12.06]μ - Electroless Pt Deposition on Mn3O4 Nanoparticles via the Galvanic Replacement Process 07-03 1930
20 [12.06]Ž± -Surface-Dependent, Ligand-Mediated Photochemical Etching of CdSe Nanoplatelets 06-14 1619
19 [12.05]⹮ -In Situ Supramolecular Assembly and ModularModification of Hyaluronic Acid Hydrogels for 3D Cellular Engineering 11-25 854
18 [12.01] -Coherent Electronic and Phononic Oscillations in Single-Walled 03-05 1847
17 [12.02]ؿ -Ferritin-Based New Magnetic Force Microscopic Probe Detecting 10 nm Sized Magnetic Nanoparticles 02-17 1765
16 [11.11]踸, -Ionic Surfactant–Coated Burkholderia Cepacia Lipase as a Highly Active and Enantioselective Catalyst for the Dynamic Kinetic Resolution of Secondary Alcohols 12-27 2254
15 [11.2] -DNA-Functionalized Nanochannels for SNP Detection 02-22 3569
14 [11.1]⹮ -Supramolecular fishing for plasma membrane proteins using an ultrastable synthetic host–guest binding pair 11-25 1026
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