Simple Designed Synthesis of Graphene Based Nanocomposites for Energy Related Applications Yuanzhe...
-
Upload
colin-clarke -
Category
Documents
-
view
218 -
download
4
Transcript of Simple Designed Synthesis of Graphene Based Nanocomposites for Energy Related Applications Yuanzhe...
![Page 1: Simple Designed Synthesis of Graphene Based Nanocomposites for Energy Related Applications Yuanzhe Piao Graduate school of Convergence Science and Technology,](https://reader036.fdocuments.net/reader036/viewer/2022070407/56649e2a5503460f94b184b3/html5/thumbnails/1.jpg)
Yuanzhe PiaoGraduate school of Convergence Science and Technology, Seoul National University
Pure and Applied Chemistry International Conferences (PACCON) 2013 The Tide Resort, Thailand. January 23, 2013 – January 25, 2013
![Page 2: Simple Designed Synthesis of Graphene Based Nanocomposites for Energy Related Applications Yuanzhe Piao Graduate school of Convergence Science and Technology,](https://reader036.fdocuments.net/reader036/viewer/2022070407/56649e2a5503460f94b184b3/html5/thumbnails/2.jpg)
2
Lithium-ion battery
Kang Xu et al., Chem. Rev., 104 (2004) 4303
CathodeCathode
Layered structure
Spinel structure
Olivine structure
AnodeAnode
Carbonaceous material
Transition metal oxide
Alloys
![Page 3: Simple Designed Synthesis of Graphene Based Nanocomposites for Energy Related Applications Yuanzhe Piao Graduate school of Convergence Science and Technology,](https://reader036.fdocuments.net/reader036/viewer/2022070407/56649e2a5503460f94b184b3/html5/thumbnails/3.jpg)
3
Graphene – single layer Graphene – single layer graphitegraphite
π-orbitalσ-bond
Hexagonal network of Carbon – sp2
bonding
sp2 sp3• High surface area (2,630 m2g-1)
vs. graphite (10 m2g-1) & CNT
(1,315 m2g-1)
• High electrical conductivity
• Unique mechanical strength
• Chemical stability
• …
PropertiesProperties
1. Graphene based nanocomposites 1. Graphene based nanocomposites
![Page 4: Simple Designed Synthesis of Graphene Based Nanocomposites for Energy Related Applications Yuanzhe Piao Graduate school of Convergence Science and Technology,](https://reader036.fdocuments.net/reader036/viewer/2022070407/56649e2a5503460f94b184b3/html5/thumbnails/4.jpg)
4
Graphene nanocomposite materials for energy devices: electrode materials for lithium ion batteries and supercapacitors.
Graphene
![Page 5: Simple Designed Synthesis of Graphene Based Nanocomposites for Energy Related Applications Yuanzhe Piao Graduate school of Convergence Science and Technology,](https://reader036.fdocuments.net/reader036/viewer/2022070407/56649e2a5503460f94b184b3/html5/thumbnails/5.jpg)
5
Electrochimica Acta, 2012, 59, 509-514.
Graphene–carbon nanotube composite
Synthesis of a graphene–carbon nanotube composite and its electrochemical sensing of hydrogen peroxide
![Page 6: Simple Designed Synthesis of Graphene Based Nanocomposites for Energy Related Applications Yuanzhe Piao Graduate school of Convergence Science and Technology,](https://reader036.fdocuments.net/reader036/viewer/2022070407/56649e2a5503460f94b184b3/html5/thumbnails/6.jpg)
6
Graphene–carbon nanoparticle composite
Journal of Power Source, 2012
Enhanced electrocatalysis of PtRu onto graphene separated by Vulcan carbon spacer
![Page 7: Simple Designed Synthesis of Graphene Based Nanocomposites for Energy Related Applications Yuanzhe Piao Graduate school of Convergence Science and Technology,](https://reader036.fdocuments.net/reader036/viewer/2022070407/56649e2a5503460f94b184b3/html5/thumbnails/7.jpg)
HRTEM images of GO–S composites (insets: power spectra of the region indicated by a circle).
7
Monodisperse nanoparticles onto graphene for lithium ion batteries
A facile hydrazine-assisted hydrothermal method for the deposition of monodisperse SnO2 nanoparticles onto graphene for lithium ion batteries
![Page 8: Simple Designed Synthesis of Graphene Based Nanocomposites for Energy Related Applications Yuanzhe Piao Graduate school of Convergence Science and Technology,](https://reader036.fdocuments.net/reader036/viewer/2022070407/56649e2a5503460f94b184b3/html5/thumbnails/8.jpg)
(a) The charge–discharge curves of GO–S at a current density of 100 mA g-1, (b) cyclic voltammograms of the GO–S at a scanning rate of 0.1 mV s-1, (c) cycling performance of GO–S, SnO2 and graphene at a current density of 100 mA g1, (d) cycling performance of GO–S at various current densities after 1 cycle at a current density of 100 mA g-1.
8
J. Mater. Chem., 2012, 22, 2520-2525.
![Page 9: Simple Designed Synthesis of Graphene Based Nanocomposites for Energy Related Applications Yuanzhe Piao Graduate school of Convergence Science and Technology,](https://reader036.fdocuments.net/reader036/viewer/2022070407/56649e2a5503460f94b184b3/html5/thumbnails/9.jpg)
A one-pot microwave-assisted non-aqueous sol–gel approach
RSC Advances, 2011, 1, 1687–1690
9
![Page 10: Simple Designed Synthesis of Graphene Based Nanocomposites for Energy Related Applications Yuanzhe Piao Graduate school of Convergence Science and Technology,](https://reader036.fdocuments.net/reader036/viewer/2022070407/56649e2a5503460f94b184b3/html5/thumbnails/10.jpg)
10
Cycling performance of GNS (triangles, red), pure Fe3O4 (diamonds, magenta), IGC2 (squares, blue), IGC3 (circles, green) and at various current densities. Empty symbols indicate discharge and full symbols charge.
![Page 11: Simple Designed Synthesis of Graphene Based Nanocomposites for Energy Related Applications Yuanzhe Piao Graduate school of Convergence Science and Technology,](https://reader036.fdocuments.net/reader036/viewer/2022070407/56649e2a5503460f94b184b3/html5/thumbnails/11.jpg)
11
2. Carbon coated nanoparticles 2. Carbon coated nanoparticles
Facile scalable synthesis of magnetite nanocrystals embedded in carbon matrix as superior anode materials for lithium-ion batteries
![Page 12: Simple Designed Synthesis of Graphene Based Nanocomposites for Energy Related Applications Yuanzhe Piao Graduate school of Convergence Science and Technology,](https://reader036.fdocuments.net/reader036/viewer/2022070407/56649e2a5503460f94b184b3/html5/thumbnails/12.jpg)
The discharge/charge profiles of (a) the as-prepared magnetite-C nanocomposites, and (b) the sample prepared without pre-heat treatment under vacuum. (c) Cycle performance of each sample. Open symbols: discharge, closed symbols: charge. (d) Effect of current rate on the relative discharge capacities (the data were obtained by normalizing the third discharge capacities at various C rates to that at 0.1 C).
12
Yuanzhe Piao*, et al. Chem. Commun., 2010, 46, 118-120.
![Page 13: Simple Designed Synthesis of Graphene Based Nanocomposites for Energy Related Applications Yuanzhe Piao Graduate school of Convergence Science and Technology,](https://reader036.fdocuments.net/reader036/viewer/2022070407/56649e2a5503460f94b184b3/html5/thumbnails/13.jpg)
13
Direct Synthesis of Self-Assembled Ferrite/Carbon Hybrid Nanosheets for High Performance Lithium-Ion Battery Anodes
![Page 14: Simple Designed Synthesis of Graphene Based Nanocomposites for Energy Related Applications Yuanzhe Piao Graduate school of Convergence Science and Technology,](https://reader036.fdocuments.net/reader036/viewer/2022070407/56649e2a5503460f94b184b3/html5/thumbnails/14.jpg)
14
![Page 15: Simple Designed Synthesis of Graphene Based Nanocomposites for Energy Related Applications Yuanzhe Piao Graduate school of Convergence Science and Technology,](https://reader036.fdocuments.net/reader036/viewer/2022070407/56649e2a5503460f94b184b3/html5/thumbnails/15.jpg)
15
Yuanzhe Piao*, et al. J. Am. Chem. Soc., 2012, 134, 15010.
![Page 16: Simple Designed Synthesis of Graphene Based Nanocomposites for Energy Related Applications Yuanzhe Piao Graduate school of Convergence Science and Technology,](https://reader036.fdocuments.net/reader036/viewer/2022070407/56649e2a5503460f94b184b3/html5/thumbnails/16.jpg)
““We InnovateWe Innovate””http://plaza.snu.ac.kr/~nmec
16