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Carbon Materials from DDGS for Supercapacitors and Properties Improvement by H 2 O 2 Surface Modification Hong Jin South Dakota State University Jun 14/2013.

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Presentation on theme: "Carbon Materials from DDGS for Supercapacitors and Properties Improvement by H 2 O 2 Surface Modification Hong Jin South Dakota State University Jun 14/2013."— Presentation transcript:

1 Carbon Materials from DDGS for Supercapacitors and Properties Improvement by H 2 O 2 Surface Modification Hong Jin South Dakota State University Jun 14/2013

2 Outline  Introduction  Supercapacitors  Carbon electrode materials  Characterization  Porous properties  SEM  Raman spectrum  Electrochemical properties  Conclusion 2

3 Introduction--supercapacitors supercapacitors Double layerPseudocapacitors Hybrid capacitors 3

4 Introduction—carbon materials 4 Graphene Carbon nanotube Activated carbon

5 Introduction—carbon materials ethano l DDGS biorenewable Supercapacitors storage energy Fermentation 5

6 Introduction—carbon materials Pyrolysis biofuel Activated carbon Energy market 6 Biochar Modified AC DDGS

7 Characterization--BET 7

8 8 Sample S BET a (m 2 /g) V t b (m 3 /g) V micro c (m 3 /g) V meso d (m 3 /g) Biochar190.0023 Activated Carbon 29591.650.830.42 H 2 O 2 Modified AC 33961.841.180.65 a BET (Brunauer-Emmett-Teller) surface area. b Total pore volume, derived from NLDFT model. c Micropore volume, derived from NLDFT model. d Mesopore volume, derived from NLDFT model.

9 Characterization—SEM 9

10 Characterization—Raman 10

11 Electrochemical--Biochar 11

12 Electrochemical--AC 12

13 Electrochemical—H 2 O 2 Modified AC 13

14 Electrochemical-EIS 14

15 Conclusion 15  The biochar does not show good properties  The activated carbon presents high specific capacitance  The hydrogen peroxide modified carbon shows higher surface area  The modified carbon demonstrates best cyclic voltammetry property and lowest inner resistance

16 Acknowledgements Thank you 16


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