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1-6. Carbon-based 2D and multi-dimensional hybrid materials and their analysis

| Participants

member
member_detail
Name :Jongsun Lim
Affiliation :KRICT
Tel :+82-42-860-7217
E-mail :jslim@krict.re.kr
Homepage :http://www.krict.re.kr
member
member_detail
Name :An, Ki-Seok
Affiliation :KRICT
Tel :+82-42-860-7356
E-mail :ksan@krict.re.kr
Homepage :http://www.krict.re.kr

| Research Purpose

Development of graphene-based hybrid materials for soft power devices and fabrication of soft power devices by solution-process

| Contents

Topic 1. Development of hybrid materials consisting of direct-grown piezoelectrics on MWCNT for flexible nanogenerators

- Synthesis of CNTs-PZT consisting of direct-grown PZT on MWCNT by reacting a mixed solution including the acid-treated mwCNTs and PZT precursor
- Fabrication of CNTs-PZT nanogenerator : The mixed solution of CNTs-PZT powder and PTFE was spin-coated onto the flexible plastic
substrate. After drying, the coated films were peeled off and sandwiched between two Au/Cr-deposited polyimide films. - Flexible nanogenerators using CNTs-PZT : output voltage ~ 8.6 V


(a) Schematic diagram of PZT-CNTs (b) Schematic diagram of the synthesis procedure of PZT-CNTs


Fabrication process of PZT-CNTs flexible film for nanogenerator measurement nanogenerator property of PZT-CNTs and blended-PZT-CNTs

Topic 2. Studies for 2D or multi-dimenaional hybrid materials

- The technology to impregnate polymer electrolyte in porous graphene nanoplatelet based electrode
- Fabrication of flexible supercapacitor : energy density ~ 39.6 Wh/kg, power density ~ 2.0 kW/kg
- Carbon-based hybrid materials combined with multi-dimensional nanostructure as a electrode of supercapacitor : specific discharge capacity > 1,000 mAh/g


Electrochemical performance of flexible supercapacitor using multi-dimensional carbon materials


Fabrication process of supercapacitor using multi-dimensional carbon materials


Electrochemical performance of multi-dimensional carbon materials in difference current collector

Topic 3. Development of solution processable 2D materials for soft power devices

- Large scale, homogeneous MoS2 layers on plastic substrates using single source including Mo and S
- Development of fabricated technology of flexible applied devices utilizing 2D materials at a low temperature(450 ℃)


Schematic of the temperature?time profile of a two-step thermal decomposition process for the synthesis of large-scale, continuous MoS2 layers and XPS survey


A photograph of the homogeneous and stoichiometric MoS2 layer synthesized directly on a polyimide film, XPS survey, Photocurrent variation of the devices as a function of the bending cycles

| Expected Contribution

- Achievement of fabrication and application technology for functionalized 2-dimensional nanomaterials
- Optimization of excellent electrical/mechanical/optical properties of hybrid nanomaterials by establishment of fabrication process of multi dimensional structure and fusion
- Achievement of development technology of multi-functional, high-strength, high-electrical conductivity multi-funtional nanomaterials which are required in information and energy industry
- Achievement of fabrication for functionalized 2-dimensional nanomaterials in bio-imaging and sensor applications
- Achievement of development technology of nano-catalysts for energy and environment industry
Providing fundamental technologies to demonstrate novel soft electronics applications through study on molecular electronic materials and processing techniques

| Representative Research Achievement

1. J. K. Han, D. H. Jeon, S. Y. Cho, S. W. Kang, S. A. Yang, S. D. Bu, S. Myung, J. Lim, M. Choi, M. Lee, M. K. Lee, Scientific Reports 2016, 6, 29562.
2. Y. R. Lim, W. Song, J. K. Han, Y. B. Lee, S. J. Kim, S. Myung, S. S. Lee, K.-S. An, C.-J. Choi, J. Lim, Adv. Mater. 2016, 28, 5025.
3. S. J. Kim, M.-A Kang, S. H. Kim, Y. B. Lee, W. Song, S. Myung, S. S. Lee, J. Lim, K.-S. An, Scientific Reports 2016, 6, 24054.
4. H.-S. Shin, K. W. Kim, Y.G-. Kang, S. Myung, J. S. Kim, K.-S. An, I. Y. Lee, S. S. Lee, RSC Adv. 2016, 6, 18809.
5. Y. R. Lim, Y. B. Lee, S. K. Kim, S. J. Kim, Y. Kim, C. Jeon, W. Song, S. Myung, S. S. Lee, K.-S. An, J. Lim, Applied Surface Science. 2017, 392, 557.