1
|
Ko SB, Sun Y, Park G, Choi HJ, Kim JG, Kim JB, Jung HJ, Lee GS, Hong S, Padmajan Sasikala S, Kim SO. Scalable Solution Phase Synthesis of 2D Siloxene via a Two-Step Interlayer Expansion Process. ACS Appl Mater Interfaces 2023. [PMID: 37377389 DOI: 10.1021/acsami.3c05289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/29/2023]
Abstract
Two-dimensional (2D) siloxene is attracting considerable research interest recently principally owing to its inherent compatibility with silicon-based semiconductor technology. -The synthesis of siloxene has been mostly limited to multilayered structures using traditional topochemical reaction procedures. Herein, we report high-yield synthesis of single to few-layer siloxene nanosheets by developing a two-step interlayer expansion and subsequent liquid phase exfoliation procedure. Our protocol enables high-yield production of few-layer siloxene nanosheets with a lateral dimension of up to 4 μm and thickness ranging from 0.8 to 4.8 nm, corresponding to single to a few layers, well stabilized in water. The atomically flat nature of exfoliated siloxene can be exploited for the construction of 2D/2D heterostructure membranes via typical solution processing. We demonstrate highly ordered graphene/siloxene heterostructure films with synergistic mechanical and electrical properties, which deliver noticeably high device capacitance when assembled into a coin cell symmetric supercapacitor device structures. Additionally, we demonstrate that the mechanically flexible exfoliated siloxene-graphene heterostructure enables its direct use in flexible and wearable supercapacitor applications.
Collapse
Affiliation(s)
- Seung-Bo Ko
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Republic of Korea
| | - Yan Sun
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Republic of Korea
| | - Gun Park
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
| | - Hee Jae Choi
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Republic of Korea
| | - Jin Goo Kim
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Republic of Korea
| | - June Beom Kim
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Republic of Korea
| | - Hong Ju Jung
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Republic of Korea
| | - Gang San Lee
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Republic of Korea
| | - Seungbum Hong
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
| | - Suchithra Padmajan Sasikala
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Republic of Korea
| | - Sang Ouk Kim
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Republic of Korea
| |
Collapse
|
2
|
Samdani JS, Kang TH, Lee BJ, Jang YH, Yu JS, Shanmugam S. Heterostructured Titanium Oxynitride-Manganese Cobalt Oxide Nanorods as High-Performance Electrode Materials for Supercapacitor Devices. ACS Appl Mater Interfaces 2020; 12:54524-54536. [PMID: 33236633 DOI: 10.1021/acsami.0c13803] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Metal oxynitrides have been considered recently as emerging electrode materials for supercapacitors. Herein, we converted titanate nanotubes into a series of titanium oxynitride (TiON) nanorods at nitridation temperatures of 800, 900, and 1000 °C in ammonia gas and tested them as supercapacitor electrodes. TiON-800, TiON-900, and TiON-1000 showed capacities of 60, 140, and 71 F g-1, respectively, at a current density of 1 A g-1. However, because of TiON's low capacity, a heterostructure (TiON-900/MnCo2O4) was designed based on the optimized TiON with MnCo2O4 (MCO). The heterostructure TiON-900-MCO and MCO electrode materials showed specific capacities of 515 and 381 F g-1, respectively, at a current density of 1 A g-1. The cycling stability retention of TiON-900 and MCO were 75 and 68%, respectively; moreover, the heterostructure of TiON-900-MCO reached 78% at a current density of 5 A g-1 over 5000 cycles. The increased capacity and sustained cycling stability retention are attributable to the synergistic effect of TiON-900 and MCO. A coin cell (CC)-type symmetric supercapacitor prototype of TiON-900-MCO was fabricated and tested in the voltage range of 0.0-2.0 V in 1 M LiClO4 in propylene carbonate/dimethyl carbonate electrolyte, and a 79% cycling retention capacity of TiON-900-MCO-CC was achieved over 10 000 cycles at a current density of 250 mA g-1. We demonstrated a prototypical single cell of TiON-900-MCO-CC as a sustained energy output by powering a red-light emitting diode that indicated TiON-900-MCo electrode materials' potential application in commercial supercapacitor devices.
Collapse
Affiliation(s)
- Jitendra Shashikant Samdani
- Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), 50-1, Sang-Ri, Hyeonpung-Myeon, Dalseong-Gun, Daegu 42988, Republic of Korea
| | - Tong-Hyun Kang
- Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), 50-1, Sang-Ri, Hyeonpung-Myeon, Dalseong-Gun, Daegu 42988, Republic of Korea
| | - Byong-June Lee
- Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), 50-1, Sang-Ri, Hyeonpung-Myeon, Dalseong-Gun, Daegu 42988, Republic of Korea
| | - Yun Hee Jang
- Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), 50-1, Sang-Ri, Hyeonpung-Myeon, Dalseong-Gun, Daegu 42988, Republic of Korea
| | - Jong-Sung Yu
- Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), 50-1, Sang-Ri, Hyeonpung-Myeon, Dalseong-Gun, Daegu 42988, Republic of Korea
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Sangaraju Shanmugam
- Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), 50-1, Sang-Ri, Hyeonpung-Myeon, Dalseong-Gun, Daegu 42988, Republic of Korea
| |
Collapse
|
3
|
Han H, Cho S. Ex Situ Fabrication of Polypyrrole-Coated Core-Shell Nanoparticles for High-Performance Coin Cell Supercapacitor. Nanomaterials (Basel) 2018; 8:E726. [PMID: 30223476 PMCID: PMC6164064 DOI: 10.3390/nano8090726] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 09/06/2018] [Accepted: 09/13/2018] [Indexed: 12/15/2022]
Abstract
Silica-conducting polymer (SiO₂-CP) has the advantages of high electrical conductivity, structural stability, and the facile formation of thin-film. This work deals with the preparation and optimization of polypyrrole (PPy)-encapsulated silica nanoparticles (SiO₂ NPs) using an ex situ method. The SiO₂-PPy core-shell NPs prepared by the ex situ method are well dispersed in water and facilitate the mass production of thin-film electrodes with improved electrical and electrochemical performances using a simple solution process. As-prepared SiO₂-PPy core-shell NPs with different particle sizes were applied to electrode materials for two-electrode supercapacitors based on coin cell batteries. It was confirmed that the areal capacitance (73.1 mF/cm²), volumetric capacitance (243.5 F/cm³), and cycling stability (88.9% after 5000 cycles) of the coin cell employing the ex situ core-shell was superior to that of the conventional core-shell (4.2 mF/cm², 14.2 mF/cm³, and 82.2%). Considering these facts, the ex situ method provides a facile way to produce highly-conductive thin-film electrodes with enhanced electrical and electrochemical properties for the coin cell supercapacitor application.
Collapse
Affiliation(s)
- Hoseong Han
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Korea.
| | - Sunghun Cho
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Korea.
| |
Collapse
|