scholarly journals Laser-Induced Interdigital Structured Graphene Electrodes Based Flexible Micro-Supercapacitor for Efficient Peak Energy Storage

Molecules ◽  
2022 ◽  
Vol 27 (1) ◽  
pp. 329
Author(s):  
Apurba Ray ◽  
Jenny Roth ◽  
Bilge Saruhan
Keyword(s):  
Energy Storage ◽  
Power Density ◽  
Discharge Rate ◽  
Polymer Gel ◽  
Polymer Gel Electrolyte ◽  
Long Cycle Life ◽  
Portable Electronics ◽  
Peak Energy ◽  
Laser Structuring ◽  
Self Powered

The rapidly developing demand for lightweight portable electronics has accelerated advanced research on self-powered microsystems (SPMs) for peak power energy storage (ESs). In recent years, there has been, in this regard, a huge research interest in micro-supercapacitors for microelectronics application over micro-batteries due to their advantages of fast charge–discharge rate, high power density and long cycle-life. In this work, the optimization and fabrication of micro-supercapacitors (MSCs) by means of laser-induced interdigital structured graphene electrodes (LIG) has been reported. The flexible and scalable MSCs are fabricated by CO2-laser structuring of polyimide-based Kapton ® HN foils at ambient temperature yielding interdigital LIG-electrodes and using polymer gel electrolyte (PGE) produced by polypropylene carbonate (PPC) embedded ionic liquid of 1-ethyl-3-methyl-imidazolium-trifluoromethansulphonate [EMIM][OTf]. This MSC exhibits a wide stable potential window up to 2.0 V, offering an areal capacitance of 1.75 mF/cm2 at a scan rate of 5.0 mV/s resulting in an energy density (Ea) of 0.256 µWh/cm2 @ 0.03 mA/cm2 and power density (Pa) of 0.11 mW/cm2 @0.1 mA/cm2. Overall electrochemical performance of this LIG/PGE-MSC is rounded with a good cyclic stability up to 10,000 cycles demonstrating its potential in terms of peak energy storage ability compared to the current thin film micro-supercapacitors.

Cyclic Stability of Supercapacitors: Materials, Energy Storage Mechanism, Test Methods, and Device

2021 ◽  
Author(s):  
Qianghong Wu ◽  
Tianqi He ◽  
Yikai Zhang ◽  
Junlei Zhang ◽  
Zhijun Wang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Power Density ◽  
Test Methods ◽  
Cycle Life ◽  
Cyclic Stability ◽  
The Real ◽  
Storage Mechanism ◽  
Long Cycle ◽  
Long Cycle Life ◽  
Higher Power

Supercapacitors, also known as electrochemical capacitors, have attracted more and more attentions in recent decades due to their advantages of higher power density and long cycle life. For the real...

Achieving ultrahigh energy storage density and energy efficiency simultaneously in sodium niobate-based lead-free dielectric capacitors via microstructure modulation

2019 ◽  
Vol 6 (8) ◽  
pp. 2148-2157 ◽  
Author(s):  
Mingxing Zhou ◽  
Ruihong Liang ◽  
Zhiyong Zhou ◽  
Xianlin Dong
Keyword(s):  
Energy Efficiency ◽  
Energy Storage ◽  
Power Density ◽  
Discharge Rate ◽  
Lead Free ◽  
Energy Storage Density ◽  
Sodium Niobate ◽  
Ultrahigh Energy ◽  
Storage Density ◽  
Charge Discharge

Recently, dielectric capacitors have drawn much attention from researchers and engineers due to their ultrahigh power density, ultrafast charge–discharge rate, and good temperature and fatigue stability.

scholarly journals Enhanced Pseudocapacitive Performance of Symmetric Polypyrrole-MnO2 Electrode and Polymer Gel Electrolyte

Polymers ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 3577
Author(s):  
Wen-Jun Zhuo ◽  
Yen-Hua Wang ◽  
Chia-Tse Huang ◽  
Ming-Jay Deng
Keyword(s):  
Solid State ◽  
Power Density ◽  
Rate Capability ◽  
High Specific Capacitance ◽  
High Energy ◽  
Gel Electrolyte ◽  
Carbon Cloth ◽  
Polymer Gel ◽  
Polymer Gel Electrolyte ◽  
Power Sources

Herein, the nanostructured polypyrrole-coated MnO2 nanofibers growth on carbon cloth (PPy-MnO2-CC) to serve as the electrodes used in conjunction with a quasi-ionic liquid-based polymer gel electrolyte (urea-LiClO4-PVA) for solid-state symmetric supercapacitors (SSCs). The resultant PPy-MnO2-CC solid-state SSCs exhibited a high specific capacitance of 270 F/g at 1.0 A/g in a stable and wide potential window of 2.1 V with a high energy/power density (165.3 Wh/kg at 1.0 kW/kg and 21.0 kW/kg at 86.4 Wh/kg) along with great cycling stability (capacitance retention of 92.1% retention after 3000 cycles) and rate capability (141 F/g at 20 A/g), exceeding most of the previously reported SSCs. The outstanding performance of the studied 2.1 V PPy-MnO2-CC flexible SSCs could be attributed to the nanostructured PPy-coated MnO2 composite electrode and the urea-LiClO4-PVA polymer gel electrolyte design. In addition, the PPy-MnO2-CC solid-state SSCs could effectively retain their electrochemical performance at various bending angles, demonstrating their huge potential as power sources for flexible and lightweight electronic devices. This work offers an easy way to design and achieve light weight and high-performance SSCs with enhanced energy/power density.

A self-powered and arch-structured triboelectric nanogenerator for portable electronics and human-machine communication

2020 ◽  
Vol 8 (18) ◽  
pp. 8997-9005
Author(s):  
Xingxing Shi ◽  
Shuidong Zhang ◽  
Shaoqin Gong
Keyword(s):  
Power Density ◽  
High Power ◽  
Triboelectric Nanogenerator ◽  
High Power Density ◽  
Portable Electronics ◽  
Self Powered ◽  
Machine Communication

An arch-structured TENG with a high-power density for portable electronics and self-powered human-machine communication.

In Situ Curing Technology for Dual Ceramic Composed by Organic–Inorganic Functional Polymer Gel Electrolyte for Dendritic‐Free and Robust Lithium–Metal Batteries

2020 ◽  
Vol 7 (20) ◽  
pp. 2000830
Author(s):  
Sajid Hussain Siyal ◽  
Muhammad Sufyan Javed ◽  
Ashique Hussain Jatoi ◽  
Jin‐Le Lan ◽  
Yunhua Yu ◽  
...  
Keyword(s):  
Gel Electrolyte ◽  
Polymer Gel ◽  
Lithium Metal ◽  
Polymer Gel Electrolyte ◽  
Functional Polymer ◽  
Lithium Metal Batteries

scholarly journals Power Density Improvement of Piezoelectric Energy Harvesters via a Novel Hybridization Scheme with Electromagnetic Transduction

Micromachines ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 803
Author(s):  
Zhongjie Li ◽  
Chuanfu Xin ◽  
Yan Peng ◽  
Min Wang ◽  
Jun Luo ◽  
...  
Keyword(s):  
Power Density ◽  
Output Power ◽  
Energy Harvester ◽  
Hybrid Energy ◽  
Energy Harvesters ◽  
Piezoelectric Patch ◽  
Piezoelectric Energy ◽  
Electromagnetic Transduction ◽  
Self Powered ◽  
Power Densities

A novel hybridization scheme is proposed with electromagnetic transduction to improve the power density of piezoelectric energy harvester (PEH) in this paper. Based on the basic cantilever piezoelectric energy harvester (BC-PEH) composed of a mass block, a piezoelectric patch, and a cantilever beam, we replaced the mass block by a magnet array and added a coil array to form the hybrid energy harvester. To enhance the output power of the electromagnetic energy harvester (EMEH), we utilized an alternating magnet array. Then, to compare the power density of the hybrid harvester and BC-PEH, the experiments of output power were conducted. According to the experimental results, the power densities of the hybrid harvester and BC-PEH are, respectively, 3.53 mW/cm3 and 5.14 μW/cm3 under the conditions of 18.6 Hz and 0.3 g. Therefore, the power density of the hybrid harvester is 686 times as high as that of the BC-PEH, which verified the power density improvement of PEH via a hybridization scheme with EMEH. Additionally, the hybrid harvester exhibits better performance for charging capacitors, such as charging a 2.2 mF capacitor to 8 V within 17 s. It is of great significance to further develop self-powered devices.

scholarly journals Novel Lithium-Ion Capacitor Based on a NiO-rGO Composite

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3586
Author(s):  
Qi An ◽  
Xingru Zhao ◽  
Shuangfu Suo ◽  
Yuzhu Bai
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Power Density ◽  
High Power ◽  
Specific Capacity ◽  
Lithium Ion ◽  
High Energy ◽  
Cycle Life ◽  
High Energy Density ◽  
Lithium Ion Capacitor

Lithium-ion capacitors (LICs) have been widely explored for energy storage. Nevertheless, achieving good energy density, satisfactory power density, and stable cycle life is still challenging. For this study, we fabricated a novel LIC with a NiO-rGO composite as a negative material and commercial activated carbon (AC) as a positive material for energy storage. The NiO-rGO//AC system utilizes NiO nanoparticles uniformly distributed in rGO to achieve a high specific capacity (with a current density of 0.5 A g−1 and a charge capacity of 945.8 mA h g−1) and uses AC to provide a large specific surface area and adjustable pore structure, thereby achieving excellent electrochemical performance. In detail, the NiO-rGO//AC system (with a mass ratio of 1:3) can achieve a high energy density (98.15 W h kg−1), a high power density (10.94 kW kg−1), and a long cycle life (with 72.1% capacity retention after 10,000 cycles). This study outlines a new option for the manufacture of LIC devices that feature both high energy and high power densities.

Giant power density produced by PIN–PMN–PT ferroelectric single crystals due to a pressure induced polar-to-nonpolar phase transformation

2021 ◽  
Author(s):  
Sergey I. Shkuratov ◽  
Jason Baird ◽  
Vladimir G. Antipov ◽  
Christopher S. Lynch ◽  
Shujun Zhang ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Energy Storage ◽  
Single Crystals ◽  
Power Density ◽  
Ferroelectric Materials ◽  
Power Supplies ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
New Generation ◽  
Power Densities

The search for ferroelectric materials capable of producing high electric charge and power densities is important for developing a new generation of ultrahigh-power-density ferroelectric energy storage devices and autonomous megawatt power supplies.

Sign in / Sign up

Export Citation Format

Share Document