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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 : 1,361  

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 77
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31 [13.07]ڹ -Fast Low Voltage Electroactive Actuators Using Nanostructured Polymer Electrolytes 07-30 1695
30 [13.07] -Photothermally Triggered Cytosolic Drug Delivery via Endosome Disruption Using a Functionalized Reduced Graphene Oxide 07-17 1478
29 [13.07]ڹ -Blue-Emitting Self-Assembled Polymer Electrolytes for Fast, Sensitive, Label-Free Detection of Cu(II) Ions in Aqueous Media 07-08 1224
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 1362
27 [13.4]⹮ -Free-Standing, Single-Monomer-Thick Two-Dimensional Polymers through Covalent Self-Assembly in Solution 11-25 1255
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25 [13.01] -Active Role of Proton in Excited State Intramolecular Proton Transfer Reaction 06-19 1427
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 1649
23 [12.07] -Bioreducible polymers for gene silencing and delivery 09-06 1736
22 [12.07]ؿ - Following the DNA Ligation of a Single Duplex Using Atomic Force Microscopy 08-01 1650
21 [12.06]μ - Electroless Pt Deposition on Mn3O4 Nanoparticles via the Galvanic Replacement Process 07-03 1948
20 [12.06]Ž± -Surface-Dependent, Ligand-Mediated Photochemical Etching of CdSe Nanoplatelets 06-14 1640
19 [12.05]⹮ -In Situ Supramolecular Assembly and ModularModification of Hyaluronic Acid Hydrogels for 3D Cellular Engineering 11-25 950
18 [12.01] -Coherent Electronic and Phononic Oscillations in Single-Walled 03-05 1864
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