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.

High-concentration ether-based electrolyte boosts the electrochemical performance of SnS2–reduced graphene oxide for K-ion batteries

2019 ◽  
Vol 7 (33) ◽  
pp. 19332-19341 ◽  
Author(s):  
Junpeng Xie ◽  
Yongqian Zhu ◽  
Ning Zhuang ◽  
Xiaodan Li ◽  
Xinran Yuan ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Storage ◽  
Electrochemical Performance ◽  
Reduced Graphene Oxide ◽  
Storage Systems ◽  
Low Cost ◽  
Li Ion Batteries ◽  
High Concentration ◽  
Reduced Graphene ◽  
Li Ion

To meet the urgent demand for energy storage systems, K-ion batteries (KIBs), with low cost and comparable electrochemical performance, have become one of the most promising alternatives to Li-ion batteries.

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.

Silicon Carbon Nanoparticles Coated with Reduced Graphene Oxide with High Specific Capacity and High-Rate Performance as Anode Material for Lithium-Ion Battery

NANO ◽  
2020 ◽  
Vol 15 (11) ◽  
pp. 2050149
Author(s):  
Xiangyu Shi ◽  
Jifei Liu ◽  
Jianfeng Dai ◽  
Yufeng Qi
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Performance ◽  
Reduced Graphene Oxide ◽  
Carbon Nanoparticles ◽  
Active Material ◽  
Specific Capacity ◽  
Lithium Ion ◽  
High Rate ◽  
Silicon Carbon ◽  
Reduced Graphene

Silicon carbon nanoparticles (SCNPs) coated with reduced graphene oxide (rGO) were fabricated by a hydrothermal method and subsequently by a simple heat treatment process. SCNPs/rGO exhibit excellent electrochemical performance which not only attributes the rGO layer to inhibit the volumetric expansion of silicon and reduce the impedance between the active material and lithium ions during the electrochemical process, but also improves the electrical conductivity of SCNPs/rGO. The as-prepared compound was cyclically tested at a current density of 150[Formula: see text]mA/g, with the first charge and discharge capacities of 3152.2[Formula: see text]mAh/g and 3342.7[Formula: see text]mAh/g, respectively. Moreover, the electrochemical performance of SCNPs/rGO was better than SCNPs. The [Formula: see text] values for fresh battery, after 1 cycle and 100 cycles, are 120.9[Formula: see text][Formula: see text], 120.5[Formula: see text][Formula: see text] and 104[Formula: see text][Formula: see text]. Thus, compared with SCNPs, SCNPs/rGO exhibited lower overall impedance values. These results indicate that the addition of graphene layer significantly improved the electrochemical performance of SCNPs electrodes and reduced the internal resistance of the battery.

Tuning the efficiency of CoFe2O4@rGO composite by Encapsulating Ag Nanoparticles for the photocatalytic degradation of Methyl violet dye and Energy storage systems

2021 ◽  
Author(s):  
S. Vijayalakshmi ◽  
Elanthamilan Elaiyappillai ◽  
Princy Merlin Johnson ◽  
Sharmila Lydia I
Keyword(s):  
Silver Nanoparticles ◽  
Graphene Oxide ◽  
Energy Storage ◽  
Ag Nanoparticles ◽  
Storage Systems ◽  
Methyl Violet ◽  
Ag Nps ◽  
Reduced Graphene ◽  
Simple Chemical ◽  
Co Precipitation

In the present work, silver nanoparticles encapsulated CoFe2O4@reduced Graphene oxide composite (Ag NPs/CoFe2O4@rGO) was prepared via a simple chemical co-precipitation technique. The formation of the materials was confirmed by various...

scholarly journals Ultra-High Energy Density Hybrid Supercapacitors Using MnO2/Reduced Graphene Oxide Hybrid Nanoscrolls

Nanomaterials ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 2049 ◽  
Author(s):  
Janardhanan. R. Rani ◽  
Ranjith Thangavel ◽  
Minjae Kim ◽  
Yun Sung Lee ◽  
Jae-Hyung Jang
Keyword(s):  
Graphene Oxide ◽  
Energy Storage ◽  
Energy Density ◽  
Storage Systems ◽  
High Energy ◽  
High Energy Density ◽  
Ultra High Energy ◽  
Hybrid Supercapacitor ◽  
Hybrid Supercapacitors ◽  
Reduced Graphene

Manganese oxide (MnO2) is a promising material for supercapacitor applications, with a theoretical ultra-high energy density of 308 Wh/kg. However, such ultra-high energy density has not been achieved experimentally in MnO2-based supercapacitors because of several practical issues, such as low electrical conductivity of MnO2, incomplete utilization of MnO2, and dissolution of MnO2. The present study investigates the potential of MnO2/reduced graphene oxide (rGO) hybrid nanoscroll (GMS) structures as electrode material for overcoming the difficulties and for developing ultra-high-energy storage systems. A hybrid supercapacitor, comprising MnO2/rGO nanoscrolls as anode material and activated carbon (AC) as a cathode, is fabricated. The GMS/AC hybrid supercapacitor exhibited enhanced energy density, superior rate performance, and promising Li storage capability that bridged the energy–density gap between conventional Li-ion batteries (LIBs) and supercapacitors. The fabricated GMS/AC hybrid supercapacitor demonstrates an ultra-high lithium discharge capacity of 2040 mAh/g. The GMS/AC cell delivered a maximum energy density of 105.3 Wh/kg and a corresponding power density of 308.1 W/kg. It also delivered an energy density of 42.77 Wh/kg at a power density as high as 30,800 W/kg. Our GMS/AC cell’s energy density values are very high compared with those of other reported values of graphene-based hybrid structures. The GMS structures offer significant potential as an electrode material for energy-storage systems and can also enhance the performance of the other electrode materials for LIBs and hybrid supercapacitors.

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