Inorganic Electrolytes in Supercapacitor

2019 ◽  
Keyword(s):  
Energy Storage ◽  
Electrochemical Performance ◽  
Power Density ◽  
High Power ◽  
Electrode Materials ◽  
Storage Systems ◽  
Research Work ◽  
Wide Operating ◽  
Charge Discharge

Supercapacitors are considered promising energy storage systems due to their high power density, fast charge-discharge, long service lifetime, wide operating temperature range and excellent capacitance retention. The electrochemical performance of the supercapacitors depends upon numerous factors such as nature of electrode materials, type of electrolyte and separator thickness, etc. Among these factors, electrolyte used in supercapacitor plays an important role in deciding final characteristics of supercapacitors. In recent decades, tremendous research work has been on the development of novel electrolytes and electrode/electrolyte configurations. In this chapter, we aimed to focus on the role of inorganic electrolytes used in supercapacitors.

Chain rigidity modification to promote the electrochemical performance of polymeric battery electrode materials

2019 ◽  
Vol 7 (17) ◽  
pp. 10581-10588 ◽  
Author(s):  
Zhihui Niu ◽  
Huaxi Wu ◽  
Lei Liu ◽  
Gaole Dai ◽  
Shiyun Xiong ◽  
...  
Keyword(s):  
Energy Density ◽  
Electrochemical Performance ◽  
Power Density ◽  
High Power ◽  
Electrode Materials ◽  
High Power Density ◽  
Battery Materials ◽  
Chain Rigidity ◽  
Battery Electrode ◽  
Rigidity Modification

Tuning the chain rigidity enables high power density without sacrificing the volumetric energy density for polymeric battery materials.

scholarly journals The Role of the Binder/Solvent Pair on the Electrochemical Performance of Aluminium Batteries

MRS Advances ◽  
2019 ◽  
Vol 4 (14) ◽  
pp. 807-812 ◽  
Author(s):  
Jasmin Smajic ◽  
Amira Alazmi ◽  
Pedro M. F. J. Costa
Keyword(s):  
Graphene Oxide ◽  
Energy Storage ◽  
Electrochemical Performance ◽  
Carboxymethyl Cellulose ◽  
Polyvinylidene Fluoride ◽  
Storage Systems ◽  
Active Material ◽  
Aluminium Chloride ◽  
Reduced Graphene

ABSTRACTIn energy storage systems, every component that makes up an electrode can greatly affect the electrochemical performance. One example includes the so-called “binders” used in secondary batteries. Herein, we compare the influence of using polyvinylidene fluoride (PVDF) or sodium carboxymethyl cellulose (CMC) on the electrochemical performance of an aluminium chloride battery (ACB) system. The active material of the cathode was a reduced graphene oxide dried under supercritical conditions (RGOCPD). Interestingly, while PVDF enabled one of the highest capacities reported for ACBs, the CMC resulted in a significant degradation of the cell’s performance.

scholarly journals Enhanced Supercapacitive Performance of Higher-Ordered 3D-Hierarchical Structures of Hydrothermally Obtained ZnCo2O4 for Energy Storage Devices

Nanomaterials ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 1206 ◽  
Author(s):  
Gutturu Rajasekhara Reddy ◽  
Nadavala Siva Kumar ◽  
Borelli Deva Prasad Raju ◽  
Gnanendra Shanmugam ◽  
Ebrahim H. Al-Ghurabi ◽  
...  
Keyword(s):  
Energy Storage ◽  
Specific Capacitance ◽  
Power Density ◽  
High Power ◽  
Cycle Performance ◽  
Elemental Distribution ◽  
High Power Density ◽  
Fast Charge ◽  
Two Samples ◽  
Charge Discharge

The demand for eco-friendly renewable energy resources as energy storage and management devices is increased due to their high-power density and fast charge/discharge capacity. Recently, supercapacitors have fascinated due to their fast charge–discharge capability and high-power density along with safety. Herein, the authors present the synthesis of 3D-hierarchical peony-like ZnCo2O4 structures with 2D-nanoflakes by a hydrothermal method using polyvinylpyrrolidone. The reaction time was modified to obtain two samples (ZCO-6h and ZCO-12h) and the rest of the synthesis conditions were the same. The synthesized structures were systematically studied through various techniques: their crystalline characteristics were studied through XRD analysis, their morphologies were inspected through SEM and TEM, and the elemental distribution and oxidation states were studied by X-ray photoelectron spectroscopy (XPS). ZCO-12h sample has a larger surface area (55.40 m2·g−1) and pore size (24.69 nm) than ZCO-6h, enabling high-speed transport of ions and electrons. The ZCO-12h electrode showed a high-specific capacitance of 421.05 F·g−1 (31.52 C·g−1) at 1 A·g−1 and excellent cycle performance as measured by electrochemical analysis. Moreover, the morphologic characteristics of the prepared hierarchical materials contributed significantly to the improvement of specific capacitance. The excellent capacitive outcomes recommend the 3D-ZnCo2O4 hierarchical peony-like structures composed of 2D-nanoflakes as promising materials for supercapacitors with high-performance.

scholarly journals Insights into the estimation of capacitance for carbon-based supercapacitors

RSC Advances ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 5479-5486
Author(s):  
Majedeh Gheytanzadeh ◽  
Alireza Baghban ◽  
Sajjad Habibzadeh ◽  
Ahmad Mohaddespour ◽  
Otman Abida
Keyword(s):  
Energy Storage ◽  
Power Density ◽  
Double Layer ◽  
High Power ◽  
Electric Double Layer ◽  
Active Component ◽  
Storage Systems ◽  
High Power Density ◽  
Double Layer Capacitors ◽  
Carbon Based

Carbon-based materials are broadly used as the active component of electric double layer capacitors (EDLCs) in energy storage systems with a high power density.

scholarly journals Optimizing nanoparticle perovskite for bifunctional oxygen electrocatalysis

2016 ◽  
Vol 9 (1) ◽  
pp. 176-183 ◽  
Author(s):  
Jae-Il Jung ◽  
Marcel Risch ◽  
Seungkyu Park ◽  
Min Gyu Kim ◽  
Gyutae Nam ◽  
...  
Keyword(s):  
Energy Storage ◽  
Power Density ◽  
High Power ◽  
Storage Systems ◽  
High Power Density ◽  
Energy Storage Systems

The successful synthesis of bifunctional perovskite electrocatalysts ∼50 nm in size towards the development of energy storage systems with high power density is presented.

scholarly journals Biomass-Derived Graphene-Based Materials Embedded with Onion-Like Carbons for High Power Supercapacitors

2021 ◽  
Author(s):  
SungHoon Jung ◽  
Pham Thi Huong ◽  
Shalini Sahani ◽  
Kumud Malika Tripathi ◽  
Byung Jun Park ◽  
...  
Keyword(s):  
Energy Storage ◽  
Power Density ◽  
Current Density ◽  
High Power ◽  
Electrode Materials ◽  
High Current Density ◽  
3D Structure ◽  
High Energy ◽  
High Energy Density ◽  
High Power Density

Abstract We report a facile method to produce composites of hierarchically porous graphene-based materials embedded with onion-like carbons (Gr-OLCs) for high power density supercapacitors. Gr-OLCs were produced from the mixture of glucose, thiourea, and ammonium chloride, through the condensation reaction and subsequent blow into three-dimensional (3D) structure, and carbonization process. Owing to its high surface area, hierarchical pore distribution, and interconnected carbon networks embedded with onion-like carbons, this carbon exhibited the specific capacitance of 140 F g-1 at a high current density of 64 A g-1. Highly porous and interconnected carbon structure tend to facilitate the movement of electrolyte ions within the electrode and provide an efficient pathway for the movement of charge carriers, resulting in an exceptionally high power density of 1,737 kW kg-1, while maintaining its high energy density of 30 Wh kg-1 at current density of 256 A g-1. Studies on the complex capacitance of the cell revealed that these carbon electrodes possess stable energy storage features with minimal capacitive loss, achieving both high power and energy densities. This work may provide a new type of carbon-based electrode materials which can meet the requirements for high power energy storage devices.

scholarly journals Polymer Binders: Characterization and Development toward Aqueous Electrode Fabrication for Sustainability

Polymers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 631
Author(s):  
Aleksander Cholewinski ◽  
Pengxiang Si ◽  
Marianna Uceda ◽  
Michael Pope ◽  
Boxin Zhao
Keyword(s):  
Energy Storage ◽  
Electrode Materials ◽  
Storage Systems ◽  
High Capacity ◽  
Energy Storage Systems ◽  
Volume Changes ◽  
Polymer Binders ◽  
Aqueous Conditions ◽  
Aqueous Binder ◽  
Electrode Processing

Binders play an important role in electrode processing for energy storage systems. While conventional binders often require hazardous and costly organic solvents, there has been increasing development toward greener and less expensive binders, with a focus on those that can be processed in aqueous conditions. Due to their functional groups, many of these aqueous binders offer further beneficial properties, such as higher adhesion to withstand the large volume changes of several high-capacity electrode materials. In this review, we first discuss the roles of binders in the construction of electrodes, particularly for energy storage systems, summarize typical binder characterization techniques, and then highlight the recent advances on aqueous binder systems, aiming to provide a stepping stone for the development of polymer binders with better sustainability and improved functionalities.

Mn-based oxides for aqueous rechargeable metal ion batteries

2021 ◽  
Author(s):  
Yaning Gao ◽  
Haoyi Yang ◽  
Ying Bai ◽  
Chuan Wu
Keyword(s):  
Energy Storage ◽  
Metal Ion ◽  
Electrode Materials ◽  
Storage Systems ◽  
Energy Storage Systems

Aqueous rechargeable metal ion batteries (ARMBs), featuring safety, facile manufacturing and environmental benignity, have recently attracted extensive attention as promising energy storage systems. Particularly, pursuit of electrode materials with abundance,...

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.

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