scholarly journals Electrical and Capacitive Response of Hydrogel Solid-Like Electrolytes for Supercapacitors

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1337
Author(s):  
Guillem Ruano ◽  
José I. Iribarren ◽  
Maria M. Pérez-Madrigal ◽  
Juan Torras ◽  
Carlos Alemán
Keyword(s):  
Energy Storage ◽  
Solid Electrolyte ◽  
Electrochemical Impedance ◽  
Design Feature ◽  
Wearable Electronics ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Deformation Features ◽  
Semi Solid ◽  
Conductive Hydrogels

Flexible hydrogels are attracting significant interest as solid-like electrolytes for energy storage devices, especially for supercapacitors, because of their lightweight and anti-deformation features. Here, we present a comparative study of four ionic conductive hydrogels derived from biopolymers and doped with 0.1 M NaCl. More specifically, such hydrogels are constituted by κ-carrageenan (κC), carboxymethyl cellulose (CMC), poly-γ-glutamic acid (PGGA) or a phenylalanine-containing polyesteramide (PEA). After examining the morphology and the swelling ratio of the four hydrogels, which varies between 483% and 2356%, their electrical and capacitive behaviors were examined using electrochemical impedance spectroscopy. Measurements were conducted on devices where a hydrogel film was sandwiched between two identical poly(3,4-ethylenedioxythiophene) electrodes. The bulk conductivity of the prepared doped hydrogels is 76, 48, 36 and 34 mS/cm for PEA, PGGA, κC and CMC, respectively. Overall, the polyesteramide hydrogel exhibits the most adequate properties (i.e., low electrical resistance and high capacitance) to be used as semi-solid electrolyte for supercapacitors, which has been attributed to its distinctive structure based on the homogeneous and abundant distribution of both micro- and nanopores. Indeed, the morphology of the polyestermide hydrogel reduces the hydrogel resistance, enhances the transport of ions, and results in a better interfacial contact between the electrodes and solid electrolyte. The correlation between the supercapacitor performance and the hydrogel porous morphology is presented as an important design feature for the next generation of light and flexible energy storage devices for wearable electronics.

scholarly journals Tailoring the supercapacitive performances of noble metal oxides, porous carbons and their composites

2013 ◽  
Vol 78 (12) ◽  
pp. 2141-2164 ◽  
Author(s):  
Vladimir Panic ◽  
Aleksandar Dekanski ◽  
Branislav Nikolic
Keyword(s):  
Energy Storage ◽  
Metal Oxides ◽  
Noble Metal ◽  
Electrochemical Impedance ◽  
Depth Profiling ◽  
Thin Layers ◽  
Energy Storage Devices ◽  
Capacitive Energy Storage ◽  
Storage Devices ◽  
Noble Metal Oxides

Porous electrochemical supercapacitive materials, as an important type of new-generation energy storage devices, require a detailed analysis and knowledge of their capacitive performances upon different charging/discharging regimes. The investigation of the responses to dynamic perturbations of typical representatives, noble metal oxides, carbonaceous materials and RuO2-impregnated carbon blacks, by electrochemical impedance spectroscopy (EIS) is presented. This presentation follows a brief description of supercapacitive behavior and origin of pseudocapacitive response of noble metal oxides. For all investigated materials, the electrical charging/discharging equivalent of the EIS response was found to obey the transmission line model envisaged as so-called ?resistor/capacitor (RC) ladder?. The ladder features are correlated to material physicochemical properties, its composition and the composition of the electrolyte. Fitting of the EIS data of different supercapacitive materials to appropriate RC ladders enables the in-depth profiling of the capacitance and pore resistance of their porous thin-layers and finally the complete revelation of capacitive energy storage issues.

Flexible supercapacitor electrodes using metal–organic frameworks

Nanoscale ◽  
2020 ◽  
Vol 12 (34) ◽  
pp. 17649-17662 ◽  
Author(s):  
Jayesh Cherusseri ◽  
Deepak Pandey ◽  
Kowsik Sambath Kumar ◽  
Jayan Thomas ◽  
Lei Zhai
Keyword(s):  
Energy Storage ◽  
Metal Organic Frameworks ◽  
Wearable Electronics ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Flexible Supercapacitor ◽  
Metal Organic

Metal–organic frameworks are emerging players in the fabrication of flexible energy storage devices to power flexible and wearable electronics.

scholarly journals Cryopolymerization enables anisotropic polyaniline hybrid hydrogels with superelasticity and highly deformation-tolerant electrochemical energy storage

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Le Li ◽  
Yu Zhang ◽  
Hengyi Lu ◽  
Yufeng Wang ◽  
Jingsan Xu ◽  
...  
Keyword(s):  
Energy Storage ◽  
Polyvinyl Alcohol ◽  
Complete Recovery ◽  
High Energy ◽  
Continuous Phase ◽  
High Energy Density ◽  
Wearable Electronics ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Hybrid Hydrogels

AbstractThe development of energy storage devices that can endure large and complex deformations is central to emerging wearable electronics. Hydrogels made from conducting polymers give rise to a promising integration of high conductivity and versatility in processing. However, the emergence of conducting polymer hydrogels with a desirable network structure cannot be readily achieved using conventional polymerization methods. Here we present a cryopolymerization strategy for preparing an intrinsically stretchable, compressible and bendable anisotropic polyvinyl alcohol/polyaniline hydrogel with a complete recovery of 100% stretching strain, 50% compressing strain and fully bending. Due to its high mechanical strength, superelastic properties and bi-continuous phase structure, the as-obtained anisotropic polyvinyl alcohol/polyaniline hydrogel can work as a stretching/compressing/bending electrode, maintaining its stable output under complex deformations for an all-solid-state supercapacitor. In particular, it achieves an extremely high energy density of 27.5 W h kg−1, which is among that of state-of-the-art stretchable supercapacitors.

Recent progress in conductive polymers for advanced fiber-shaped electrochemical energy storage devices

2021 ◽  
Author(s):  
Xiaoqin Li ◽  
Xiaojuan Chen ◽  
Zhaoyu Jin ◽  
Panpan Li ◽  
Dan Xiao
Keyword(s):  
Energy Storage ◽  
Electrochemical Performance ◽  
Recent Progress ◽  
Conductive Polymers ◽  
Electrochemical Energy Storage ◽  
Wearable Electronics ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Electrochemical Energy

Conductive polymers endow fiber-shaped electrodes and devices with excellent mechanical and electrochemical performance for energy storage in future wearable electronics.

Constructing compatible interface between Li7La3Zr2O12 solid electrolyte and LiCoO2 cathode for stable cycling performances at 4.5 V

Nanoscale ◽  
2021 ◽  
Author(s):  
Yuwan Dong ◽  
Panzhe Su ◽  
Guanjie He ◽  
Huiling Zhao ◽  
Ying Bai
Keyword(s):  
Energy Storage ◽  
Solid Electrolyte ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Interfacial Instabilities ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Tap Density ◽  
High Theoretical Capacity ◽  
Cycling Performances

With high theoretical capacity and tap density, LiCoO2 (LCO) cathode has been extensively utilized in lithium-ion batteries (LIBs) for energy storage devices. However, the bottleneck of structural and interfacial instabilities...

scholarly journals Triaxial Carbon Nanotube/Conducting Polymer Wet-Spun Fibers Supercapacitors for Wearable Electronics

Nanomaterials ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 3
Author(s):  
Azadeh Mirabedini ◽  
Zan Lu ◽  
Saber Mostafavian ◽  
Javad Foroughi
Keyword(s):  
Carbon Nanotube ◽  
Energy Storage ◽  
Low Cost ◽  
Future Generation ◽  
Maximum Energy ◽  
Wearable Electronics ◽  
Electronic Textiles ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Increasing Demand

The ubiquity of wearables, coupled with the increasing demand for power, presents a unique opportunity for nanostructured fiber-based mobile energy storage systems. When designing wearable electronic textiles, there is a need for mechanically flexible, low-cost and light-weight components. To meet this demand, we have developed an all-in-one fiber supercapacitor with a total thickness of less than 100 μm using a novel facile coaxial wet-spinning approach followed by a fiber wrapping step. The formed triaxial fiber nanostructure consisted of an inner poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) core coated with an ionically conducting chitosan sheath, subsequently wrapped with a carbon nanotube (CNT) fiber. The resulting supercapacitor is highly flexible, delivers a maximum energy density 5.83 Wh kg−1 and an extremely high power of 1399 W kg−1 along with remarkable cyclic stability and specific capacitance. This asymmetric all-in-one fiber supercapacitor may pave the way to a future generation of wearable energy storage devices.

scholarly journals A Green Synthesis of Grpahene Based Composite for Energy Storage Application

2019 ◽  
Vol 8 (6S4) ◽  
pp. 393-396
Keyword(s):  
Energy Storage ◽  
Electrochemical Impedance ◽  
Synthesis Method ◽  
Electrochemical Performances ◽  
Composite Electrodes ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Capacitive Properties ◽  
High Specific Energy ◽  
Technological Platform

In this study, graphene-molybdenum oxide composite materials were prepared via green hydrothermal synthesis method and evaluated as supercapacitor electrodes. The morphology and structure of the composite were examined by using Scanning Electron Microscopy (SEM), Raman spectroscopy. The electrochemical performances of the composite were evaluated by cyclic voltammetry (CV), galvanostatic chargedischarge (CD) method, and electrochemical impedance spectroscopy (EIS). The electrochemical results show that the composite electrodes possess improved specific capacitance of 122 F/g at a scan rate of 5 mV/s, which is about 22% higher that of pure graphene. Additionally, the composite electrodes exhibit good capacitive properties and a high specific energy with superior capacitive retention after 1000 cycles. In contrast to the previously reported systems that are usually complicated and costly, the present work potentially provides a readily scalable technological platform for economic mass production of energy storage devices.

Flexible One-Dimensional Zn-Based Electrochemical Energy Storage Devices: Recent Progress and Future Perspectives

2021 ◽  
Author(s):  
Shengli Zhai ◽  
Zhuosheng Jiang ◽  
Xun Cai Chen ◽  
K. N. Hui ◽  
Fuming Chen
Keyword(s):  
Energy Storage ◽  
Electrochemical Energy Storage ◽  
Wearable Electronics ◽  
Future Perspectives ◽  
Energy Storage Devices ◽  
Promising Candidate ◽  
One Dimensional ◽  
Storage Devices ◽  
Good Energy ◽  
Electrochemical Energy

One-dimensional (1D) Zn-based electrochemical energy storage devices (1DZESDs) stand out as a promising candidate in recent years to power wearable electronics due to their unique features, such as good energy...

“All-in-Gel” design for supercapacitors towards solid-state energy devices with thermal and mechanical compliance

2019 ◽  
Vol 7 (15) ◽  
pp. 8826-8831 ◽  
Author(s):  
Chengyao Yin ◽  
Xinhua Liu ◽  
Junjie Wei ◽  
Rui Tan ◽  
Jie Zhou ◽  
...  
Keyword(s):  
Energy Storage ◽  
Solid State ◽  
State Energy ◽  
Step Change ◽  
Wearable Electronics ◽  
Energy Storage Devices ◽  
Composite Electrolyte ◽  
Storage Devices ◽  
Energy Devices ◽  
Mechanical Compliance

“All-in-gel” supercapacitor is designed via ionogel composite electrolyte and Bucky gel electrodes. These flexible, conductive and shape-conformable gels represent a step change in the design of safe energy storage devices for wearable electronics, in particular those facing the increased demands of hazardous operational environments.

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