Electronic Structure Engineered Heteroatom Doped All Transition Metal Sulfide Carbon Confined Heterostructure for Extrinsic Pseudocapacitor.

Autor: Patil AM; Nano-Electro-Mechanical Device Laboratory School of Mechanical Engineering, Yonsei University, 120-749, Seoul, South Korea., Moon S; School of Mechanical Engineering, Yonsei University, Seoul, 03722, Republic of Korea., Roy SB; Nano-Electro-Mechanical Device Laboratory School of Mechanical Engineering, Yonsei University, 120-749, Seoul, South Korea., Ha J; Nano-Electro-Mechanical Device Laboratory School of Mechanical Engineering, Yonsei University, 120-749, Seoul, South Korea., Chodankar NR; Mechanical Engineering Department, Khalifa University, Abu Dhabi, 127788, United Arab Emirates., Dubal DP; Centre for Materials Science, School of Chemistry and Physics, Queensland University of Technology (QUT), 2 George Street, Brisbane, 4000, Australia., Jadhav AA; Department of Physics, Shivaji University, Kolhapur, Maharashtra, 416004, India., Guan G; Section of Renewable Energy, Institute of Regional Innovation, Hirosaki University, 3 Bunkyo-cho, Hirosaki, Aomori, 036-8561, Japan., Kang K; School of Mechanical Engineering, Yonsei University, Seoul, 03722, Republic of Korea., Jun SC; Nano-Electro-Mechanical Device Laboratory School of Mechanical Engineering, Yonsei University, 120-749, Seoul, South Korea.
Jazyk: angličtina
Zdroj: Small (Weinheim an der Bergstrasse, Germany) [Small] 2023 Sep; Vol. 19 (37), pp. e2301153. Date of Electronic Publication: 2023 May 08.
DOI: 10.1002/smll.202301153
Abstrakt: 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@Co x S y core-shell heterostructure constrained in the sulphur (S), nitrogen (N) co-doped carbon (C) metal-organic frameworks (MOFs) derived nanosheets (α-/γ-MnS@Co x S y @N, SC) have been developed. The coordination bonding among Co x S y , and α-/γ-MnS nanoparticles at the interfaces and the π-π stacking interactions developed across α-/γ-MnS@Co x S y and N, SC 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@Co x S y @N, SC 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/Ti 3 C 2 T X 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.
(© 2023 Wiley-VCH GmbH.)
Databáze: MEDLINE
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