Ex Situ Fabrication of Polypyrrole-Coated Core-Shell Nanoparticles for High-Performance Coin Cell Supercapacitor

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.

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Electrochemical performances for preferred oriented PLD thin-film electrodes of LiNi0.8Co0.2O2, LiFePO4 and LiMn2O4

Solid State Ionics ◽

10.1016/j.ssi.2008.06.015 ◽

2008 ◽

Vol 179 (35-36) ◽

pp. 2011-2015 ◽

Cited By ~ 23

Author(s):

T MATSUMURA ◽

N IMANISHI ◽

A HIRANO ◽

N SONOYAMA ◽

Y TAKEDA

Keyword(s):

Thin Film ◽

Electrochemical Performances ◽

Thin Film Electrodes ◽

Preferred Oriented

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Comparative Studies on Two-Electrode Symmetric Supercapacitors Based on Polypyrrole:Poly(4-styrenesulfonate) with Different Molecular Weights of Poly(4-styrenesulfonate)

Polymers ◽

10.3390/polym11020232 ◽

2019 ◽

Vol 11 (2) ◽

pp. 232 ◽

Cited By ~ 3

Author(s):

Hoseong Han ◽

Jun Seop Lee ◽

Sunghun Cho

Keyword(s):

Thin Film ◽

Molecular Weight ◽

Electrochemical Properties ◽

Comparative Studies ◽

Solution Process ◽

High Specific Capacitance ◽

High Conductivity ◽

Practical Applications ◽

Molecular Weights ◽

Coin Cell

Poly(4-styrenesulfonate)-conducting polymer (PSS-CP) is advantageous for thin-film electrode manufacturing due to its high conductivity, high charge storage, structural stability, and excellent ink dispersion. In this work, comparative studies of two-electrode symmetric supercapacitors using Polypyrrole:Poly(4-styrenesulfonate) (PPy:PSS), with different molecular weights (Mw’s) of Poly(4-styrenesulfonate) (PSS) as the electrodes, were performed. PPy:PSS can be easily prepared using a simple solution process that enables the mass production of thin-film electrodes with improved electrical and electrochemical properties. As-prepared PPy:PSS, with different PSS molecular weights, were assembled into two-electrode supercapacitors based on coin cell structures. It was confirmed that the electrical and electrochemical properties of PPy:PSS were improved with increasing PSS molecular weight. The coin cell, using PPy:PSS with a PSS molecular weight of 1.0 × 106 g/mol, exhibited higher areal capacitance (175.3 mF/cm2), higher volumetric capacitance (584.2 F/cm3), and longer cycling stability (86.3% after 5000 cycles) compared to those of PPy:PSS with PSS molecular weights of 2.0 × 105 and 7.0 × 104 g/mol. This work provides an efficient approach for producing cost-effective and miniaturized supercapacitors with high conductivity and high specific capacitance for practical applications in a variety of electronic devices.

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Research Progress of NiMn Layered Double Hydroxides for Supercapacitors: A Review

Nanomaterials ◽

10.3390/nano8100747 ◽

2018 ◽

Vol 8 (10) ◽

pp. 747 ◽

Cited By ~ 29

Author(s):

Ai-Lan Yan ◽

Xin-Chang Wang ◽

Ji-Peng Cheng

Keyword(s):

Layered Double Hydroxides ◽

Electrode Materials ◽

Low Cost ◽

Specific Capacity ◽

Research Progress ◽

Electrochemical Performances ◽

Preparation Methods ◽

Large Power ◽

Supercapacitor Application ◽

Double Hydroxides

The research on supercapacitors has been attractive due to their large power density, fast charge/discharge speed and long lifespan. The electrode materials for supercapacitors are thus intensively investigated to improve the electrochemical performances. Various transition metal layered double hydroxides (LDHs) with a hydrotalcite-like structure have been developed to be promising electrode materials. Earth-abundant metal hydroxides are very suitable electrode materials due to the low cost and high specific capacity. This is a review paper on NiMn LDHs for supercapacitor application. We focus particularly on the recent published papers using NiMn LDHs as electrode materials for supercapacitors. The preparation methods for NiMn LDHs are introduced first. Then, the structural design and chemical modification of NiMn LDH materials, as well as the composites and films derived from NiMn LDHs are discussed. These approaches are proven to be effective to enhance the performance of supercapacitor. Finally, the reports related to NiMn LDH-based asymmetric supercapacitors are summarized. A brief discussion of the future development of NiMn LDHs is also provided.

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A novel method to modify the color of VO2-based thermochromic smart films by solution-processed VO2@SiO2@Au core–shell nanoparticles

RSC Advances ◽

10.1039/c6ra07594k ◽

2016 ◽

Vol 6 (53) ◽

pp. 47249-47257 ◽

Cited By ~ 8

Author(s):

Xuanming Lu ◽

Xiudi Xiao ◽

Ziyi Cao ◽

Yongjun Zhan ◽

Haoliang Cheng ◽

...

Keyword(s):

Au Nanoparticles ◽

Solution Process ◽

Core Shell ◽

Shell Nanoparticles ◽

Solution Processed ◽

Novel Method ◽

Core Shell Nanoparticles ◽

Color Modification

A facile solution process was developed to prepare VO2@SiO2@Au nanoparticles for color modification of VO2-based smart films.

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[email protected] Core-Shell and Yolk-Shell Nanostructures: Selective Synthesis, Characterization, and Near-Infrared-Mediated Photocatalytic Reduction of Cr(VI)

Journal of Nanomaterials ◽

10.1155/2018/1293847 ◽

2018 ◽

Vol 2018 ◽

pp. 1-9 ◽

Cited By ~ 2

Author(s):

Wan-Ni Wang ◽

Wang Dong ◽

Chen-Xi Huang ◽

Bo Liu ◽

Sheng Cheng ◽

...

Keyword(s):

Near Infrared ◽

Separation Efficiency ◽

Solution Process ◽

Infrared Light ◽

Core Shell ◽

Sulfur Source ◽

Shell Nanoparticles ◽

Near Infrared Light ◽

Shell Nanostructures ◽

Photogenerated Electrons

Constructing near-infrared-light-mediated core-shell nanostructures incorporating upconversion nanoparticles (UCNPs) and semiconductors is of great importance for potential applications in photocatalysis, nano-biomedical engineering, solar cell, etc. In this work, we have demonstrated a two-step solution process to synthesize [email protected] core-shell nanoparticles (CSN). Firstly, a layer of AA-Zn(Cd)[OH]4− composites was coated on UCNPs to form UCNPs@AA-Zn(Cd)[OH]4− composites, which has been converted to [email protected] CSN via sulfidation reaction process using thioacetamide (TAA) as the sulfur source. Moreover, the [email protected] yolk-shell nanoparticles (YSN) have been obtained from the [email protected] CSN after calcination at 400°C, which show significantly photocatalytic activity for reduction of Cr(VI) under near-infrared light. All these can be attributed to the enhanced crystallization degree, resulting in enhanced energy transfer efficiency and separation efficiency of the photogenerated electrons and holes. An alternative strategy is provided in this study for fabrication of UCNP/semiconductor composites for various applications.

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Silver thin film electrodes for supercapacitor application

Applied Surface Science ◽

10.1016/j.apsusc.2019.05.101 ◽

2019 ◽

Vol 488 ◽

pp. 142-150 ◽

Cited By ~ 9

Author(s):

Alex I. Oje ◽

A.A. Ogwu ◽

Mojtaba Mirzaeian ◽

A.M. Oje ◽

Nathaniel Tsendzughul

Keyword(s):

Thin Film ◽

Supercapacitor Application ◽

Silver Thin Film ◽

Thin Film Electrodes

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Highly conductive Ni(OH)2 nano-sheets wrapped CuCo2S4 nano-tube electrode with a core-shell structure toward high performance supercapacitor

Dalton Transactions ◽

10.1039/d1dt01075a ◽

2021 ◽

Author(s):

Yinan Yuan ◽

Henan Jia ◽

Zhaoyuan Liu ◽

Lidong Wang ◽

J. Sheng ◽

...

Keyword(s):

Electrode Material ◽

Shell Structure ◽

High Performance ◽

Electrode Materials ◽

Core Shell ◽

Electrochemical Performances ◽

Tube Electrode ◽

Optimum Selection ◽

Core Shell Structure ◽

Selection Of

The design of microstructures and the optimum selection of electrode materials have substantial effects on the electrochemical performances for supercapacitors. A core-shell structured CuCo2S4@Ni(OH)2 electrode material was designed, in which...

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