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Patil AM, Moon S, Roy SB, Ha J, Chodankar NR, Dubal DP, Jadhav AA, Guan G, Kang K, Jun SC. Electronic Structure Engineered Heteroatom Doped All Transition Metal Sulfide Carbon Confined Heterostructure for Extrinsic Pseudocapacitor. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2301153. [PMID: 37154199 DOI: 10.1002/smll.202301153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 04/13/2023] [Indexed: 05/10/2023]
Abstract
Ultra-high energy density battery-type materials are promising candidates for supercapacitors (SCs); however, slow ion kinetics and significant volume expansion remain major barriers to their practical applications. To address these issues, hierarchical lattice distorted α-/γ-MnS@Cox Sy core-shell heterostructure constrained in the sulphur (S), nitrogen (N) co-doped carbon (C) metal-organic frameworks (MOFs) derived nanosheets (α-/γ-MnS@Cox Sy @N, SC) have been developed. The coordination bonding among Cox Sy , and α-/γ-MnS nanoparticles at the interfaces and the π-π stacking interactions developed across α-/γ-MnS@Cox Sy and N, SC restrict volume expansion during cycling. Furthermore, the porous lattice distorted heteroatom-enriched nanosheets contain a sufficient number of active sites to allow for efficient electron transportation. Density functional theory (DFT) confirms the significant change in electronic states caused by heteroatom doping and the formation of core-shell structures, which provide more accessible species with excellent interlayer and interparticle conductivity, resulting in increased electrical conductivity. . The α-/γ-MnS@Cox Sy @N, SC electrode exhibits an excellent specific capacity of 277 mA hg-1 and cycling stability over 23 600 cycles. A quasi-solid-state flexible extrinsic pseudocapacitor (QFEPs) assembled using layer-by-layer deposited multi-walled carbon nanotube/Ti3 C2 TX nanocomposite negative electrode. QFEPs deliver specific energy of 64.8 Wh kg-1 (1.62 mWh cm-3 ) at a power of 933 W kg-1 and 92% capacitance retention over 5000 cycles.
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Affiliation(s)
- Amar M Patil
- Nano-Electro-Mechanical Device Laboratory School of Mechanical Engineering, Yonsei University, 120-749, Seoul, South Korea
| | - Sunil Moon
- School of Mechanical Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Sanjib Baran Roy
- Nano-Electro-Mechanical Device Laboratory School of Mechanical Engineering, Yonsei University, 120-749, Seoul, South Korea
| | - Jisang Ha
- Nano-Electro-Mechanical Device Laboratory School of Mechanical Engineering, Yonsei University, 120-749, Seoul, South Korea
| | - Nilesh R Chodankar
- Mechanical Engineering Department, Khalifa University, Abu Dhabi, 127788, United Arab Emirates
| | - Deepak P Dubal
- Centre for Materials Science, School of Chemistry and Physics, Queensland University of Technology (QUT), 2 George Street, Brisbane, 4000, Australia
| | - Arti A Jadhav
- Department of Physics, Shivaji University, Kolhapur, Maharashtra, 416004, India
| | - Guoqing Guan
- Section of Renewable Energy, Institute of Regional Innovation, Hirosaki University, 3 Bunkyo-cho, Hirosaki, Aomori, 036-8561, Japan
| | - Keonwook Kang
- School of Mechanical Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Seong Chan Jun
- Nano-Electro-Mechanical Device Laboratory School of Mechanical Engineering, Yonsei University, 120-749, Seoul, South Korea
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