High Rate Charge/Discharge Characteristics in Composite Film of Mesoporous TiO2 and Polyaniline for Photorechargeable Battery

2014 ◽  
Vol 1606 ◽  
Author(s):  
Teruaki Nomiyama ◽  
Kenta Sakamoto ◽  
Tomohito Yoshida ◽  
Akinori Kagiyama ◽  
Yuji Horie
Keyword(s):  
Composite Film ◽  
High Performance ◽  
Specific Capacity ◽  
Electrical Energy ◽  
High Rate ◽  
Galvanostatic Charge ◽  
Discharge Characteristics ◽  
Electrical Energy Storage ◽  
Charging Rate ◽  
Charge Discharge

ABSTRACTOne of promising photorechargeable electrode, which has two functions of photovoltaic and electrical energy storage, is a composite film of mesoporous TiO2 and conducting polymer polyaniline. Galvanostatic charge/discharge characteristics of the TiO2-polyaniline composite were examined to reveal how fast the film was charged. The film with a specific capacity 60-120 mAh g–1 was found to be fully charged at high charging rate 20 mA cm–2 which is comparable to high performance solar cells. Such high charging rate was achieved by the compact polyaniline layer covering the large specific surface area of mesoporous TiO2 film.

scholarly journals A Novel Synthesizing Strategy of 3D Cose2 Porous Hollow Flowers for High Performance Lithium–Sulfur Batteries

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 273
Author(s):  
Wei Xu ◽  
Qikai Wu ◽  
Zhongmei Che ◽  
Bin Fan ◽  
Dengke Zhao ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Catalytic Activity ◽  
High Performance ◽  
Specific Capacity ◽  
High Rate ◽  
High Catalytic Activity ◽  
Discharge Process ◽  
Double Hydroxide ◽  
Lithium Sulfur ◽  
Charge Discharge

Redox kinetics of lithium polysulfides (LiPSs) conversion and poor electrical conductivity of sulfur during the charge-discharge process greatly inhibit the commercialization of high-performance lithium–sulfur (Li–S) batteries. Herein, we synthesized CoSe2 porous hollow flowers (CoSe2-PHF) by etching and further selenizing layered double hydroxide, which combined the high catalytic activity of transition metal compound and high electrical conductivity of selenium. The obtained CoSe2-PHF can efficiently accelerate the catalytic conversion of LiPSs, expedite the electron transport, and improve utilization of active sulfur during the charge-discharge process. As a result, with CoSe2-PHF/S-based cathodes, the Li–S batteries exhibited a reversible specific capacity of 955.8 mAh g−1 at 0.1 C and 766.0 mAh g−1 at 0.5 C, along with a relatively small capacity decay rate of 0.070% per cycle within 400 cycles at 1 C. Even at the high rate of 3 C, the specific capacity of 542.9 mAh g−1can be maintained. This work enriches the way to prepare porous composites with high catalytic activity and electrical conductivity as sulfur hosts for high-rate, long-cycle rechargeable Li–S batteries.

Block copolymer derived 3-D interpenetrating multifunctional gyroidal nanohybrids for electrical energy storage

2018 ◽  
Vol 11 (5) ◽  
pp. 1261-1270 ◽  
Author(s):  
J. G. Werner ◽  
G. G. Rodríguez-Calero ◽  
H. D. Abruña ◽  
U. Wiesner
Keyword(s):  
Energy Storage ◽  
Block Copolymer ◽  
Electrical Energy ◽  
Discharge Characteristics ◽  
Electrical Energy Storage ◽  
Charge Discharge

All necessary battery components are synthesized within a three-dimensionally periodic, co-continuous nanostructure and the first reversible charge–discharge characteristics are demonstrated.

scholarly journals Nitrogen-rich covalent organic frameworks with multiple carbonyls for high-performance sodium batteries

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Ruijuan Shi ◽  
Luojia Liu ◽  
Yong Lu ◽  
Chenchen Wang ◽  
Yixin Li ◽  
...  
Keyword(s):  
High Performance ◽  
Density Functional ◽  
Specific Capacity ◽  
Density Functional Theory Calculations ◽  
Rechargeable Batteries ◽  
High Rate ◽  
Ex Situ ◽  
Covalent Organic Frameworks ◽  
Rate Performance ◽  
Practical Applications

AbstractCovalent organic frameworks with designable periodic skeletons and ordered nanopores have attracted increasing attention as promising cathode materials for rechargeable batteries. However, the reported cathodes are plagued by limited capacity and unsatisfying rate performance. Here we report a honeycomb-like nitrogen-rich covalent organic framework with multiple carbonyls. The sodium storage ability of pyrazines and carbonyls and the up-to twelve sodium-ion redox chemistry mechanism for each repetitive unit have been demonstrated by in/ex-situ Fourier transform infrared spectra and density functional theory calculations. The insoluble electrode exhibits a remarkably high specific capacity of 452.0 mAh g−1, excellent cycling stability (~96% capacity retention after 1000 cycles) and high rate performance (134.3 mAh g−1 at 10.0 A g−1). Furthermore, a pouch-type battery is assembled, displaying the gravimetric and volumetric energy density of 101.1 Wh kg−1cell and 78.5 Wh L−1cell, respectively, indicating potentially practical applications of conjugated polymers in rechargeable batteries.

scholarly journals The Use of Succinonitrile as an Electrolyte Additive for Composite-Fiber Membranes in Lithium-Ion Batteries

Membranes ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 45 ◽  
Author(s):  
Jahaziel Villarreal ◽  
Roberto Orrostieta Chavez ◽  
Sujay A. Chopade ◽  
Timothy P. Lodge ◽  
Mataz Alcoutlabi
Keyword(s):  
Ionic Liquid ◽  
Ionic Conductivity ◽  
Lithium Ion Batteries ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Composite Fiber ◽  
Galvanostatic Charge ◽  
Lithium Anode ◽  
Charge Discharge ◽  
Licoo2 Cathode

In the present work, the effect of temperature and additives on the ionic conductivity of mixed organic/ionic liquid electrolytes (MOILEs) was investigated by conducting galvanostatic charge/discharge and ionic conductivity experiments. The mixed electrolyte is based on the ionic liquid (IL) (EMI/TFSI/LiTFSI) and organic solvents EC/DMC (1:1 v/v). The effect of electrolyte type on the electrochemical performance of a LiCoO2 cathode and a SnO2/C composite anode in lithium anode (or cathode) half-cells was also investigated. The results demonstrated that the addition of 5 wt.% succinonitrile (SN) resulted in enhanced ionic conductivity of a 60% EMI-TFSI 40% EC/DMC MOILE from ~14 mS·cm−1 to ~26 mS·cm−1 at room temperature. Additionally, at a temperature of 100 °C, an increase in ionic conductivity from ~38 to ~69 mS·cm−1 was observed for the MOILE with 5 wt% SN. The improvement in the ionic conductivity is attributed to the high polarity of SN and its ability to dissolve various types of salts such as LiTFSI. The galvanostatic charge/discharge results showed that the LiCoO2 cathode with the MOILE (without SN) exhibited a 39% specific capacity loss at the 50th cycle while the LiCoO2 cathode in the MOILE with 5 wt.% SN showed a decrease in specific capacity of only 14%. The addition of 5 wt.% SN to the MOILE with a SnO2/C composite-fiber anode resulted in improved cycling performance and rate capability of the SnO2/C composite-membrane anode in lithium anode half-cells. Based on the results reported in this work, a new avenue and promising outcome for the future use of MOILEs with SN in lithium-ion batteries (LIBs) can be opened.

scholarly journals ХАРАКТЕРИЗАЦИЯ УГЛЕРОДНЫХ ЭЛЕКТРОДОВ С НАНОЧАСТИЦАМИ ГИДРОКСИД НИКЕЛЯ ДЛЯ СУПЕРКОНДЕНСАТОРОВ (CHARACTERIZATION OF CARBON ELECTRODES WITH NANOPARTICLES OF NICKEL HYDROXIDE FOR SUPERCONDENSERS)

2020 ◽  
Author(s):  
Shyryn Nurbolat ◽  
Zhanar Kalkozova ◽  
Khabibulla Abdullin
Keyword(s):  
Cyclic Voltammetry ◽  
Nickel Hydroxide ◽  
Polyvinylidene Fluoride ◽  
Carbon Materials ◽  
Specific Capacity ◽  
Carbon Electrodes ◽  
Composite Electrodes ◽  
Galvanostatic Charge ◽  
Highly Dispersed ◽  
Charge Discharge

Composite electrodes for supercapacitors have been obtained, consisting of a matrix of highly dispersed carbon materials: microcrystalline graphite and multi-walled carbon nanotubes, also a filler of nanoparticles of nickel hydroxide. Β-Co (OH) 2 and β-Ni (OH) 2 nanopowders were obtained by chemical deposition from solution. To create the electrodes, a polyvinylidene fluoride polymer in the form of a powder was used as a bonding material. The main technological stages of the manufacture of electrodes were determined, the parameters of the obtained structures were measured by the method of cyclic voltammetry and galvanostatic charge-discharge. For the manufacture of carbon electrodes, the optimal ratios of highly dispersed carbon materials, a binder polymer and a solvent have been determined to create mechanically strong layers with high conductivity and capacity. The technique of creating capacitor structures and measuring the capacitance of the obtained electrochemical capacitors has been worked out. Capacitors made of highly dispersed carbon materials showed typical rectangular curves of cyclic voltammetry and a linear decay-rise of the galvanostatic charge-discharge dependences. Typical values of specific capacity ~ 50 F / g were obtained. Composite electrodes made of nickel hydroxide nanoparticles in a carbon matrix demonstrated an increase in capacitance to ~ 180 F / g. It is shown that composite electrodes are promising for creating capacitors with a high specific capacity.

scholarly journals Boosting High-Rate Zinc-Storage Performance by the Rational Design of Mn2O3 Nanoporous Architecture Cathode

2019 ◽  
Vol 12 (1) ◽  
Author(s):  
Danyang Feng ◽  
Tu-Nan Gao ◽  
Ling Zhang ◽  
Bingkun Guo ◽  
Shuyan Song ◽  
...  
Keyword(s):  
High Performance ◽  
Manganese Oxides ◽  
Rational Design ◽  
Electrode Materials ◽  
Specific Capacity ◽  
Rate Capability ◽  
High Rate ◽  
Pore Sizes ◽  
Storage Performance ◽  
Zinc Storage

AbstractManganese oxides are regarded as one of the most promising cathode materials in rechargeable aqueous Zn-ion batteries (ZIBs) because of the low price and high security. However, the practical application of Mn2O3 in ZIBs is still plagued by the low specific capacity and poor rate capability. Herein, highly crystalline Mn2O3 materials with interconnected mesostructures and controllable pore sizes are obtained via a ligand-assisted self-assembly process and used as high-performance electrode materials for reversible aqueous ZIBs. The coordination degree between Mn2+ and citric acid ligand plays a crucial role in the formation of the mesostructure, and the pore sizes can be easily tuned from 3.2 to 7.3 nm. Ascribed to the unique feature of nanoporous architectures, excellent zinc-storage performance can be achieved in ZIBs during charge/discharge processes. The Mn2O3 electrode exhibits high reversible capacity (233 mAh g−1 at 0.3 A g−1), superior rate capability (162 mAh g−1 retains at 3.08 A g−1) and remarkable cycling durability over 3000 cycles at a high current rate of 3.08 A g−1. Moreover, the corresponding electrode reaction mechanism is studied in depth according to a series of analytical methods. These results suggest that rational design of the nanoporous architecture for electrode materials can effectively improve the battery performance. "Image missing"

Mesoporous Manganese Oxide Nanowires for High-Capacity, High-Rate, Hybrid Electrical Energy Storage

ACS Nano ◽  
2011 ◽  
Vol 5 (10) ◽  
pp. 8275-8287 ◽  
Author(s):  
Wenbo Yan ◽  
Talin Ayvazian ◽  
Jungyun Kim ◽  
Yu Liu ◽  
Keith C. Donavan ◽  
...  
Keyword(s):  
Energy Storage ◽  
Manganese Oxide ◽  
High Capacity ◽  
Electrical Energy ◽  
High Rate ◽  
Oxide Nanowires ◽  
Electrical Energy Storage

High-Performance Lead-Free Bulk Ceramics for Energy Storage Applications: Design strategies and Challenges

2021 ◽  
Author(s):  
Zetian Yang ◽  
Hongliang Du ◽  
Li Jin ◽  
Dirk Poelman
Keyword(s):  
Energy Storage ◽  
Power Systems ◽  
High Performance ◽  
Electrical Energy ◽  
Pulsed Power ◽  
Lead Free ◽  
Design Strategies ◽  
Discharge Rates ◽  
Energy Storage Applications ◽  
Charge Discharge

Compared with fuel cells and electrochemical capacitors, dielectric capacitors are regarded as promising devices to store electrical energy for pulsed power systems due to their fast charge/discharge rates and ultrahigh...

scholarly journals ХАРАКТЕРИЗАЦИЯ УГЛЕРОДНЫХ ЭЛЕКТРОДОВ С НАНОЧАСТИЦАМИ ГИДРОКСИД НИКЕЛЯ ДЛЯ СУПЕРКОНДЕНСАТОРОВ(CHARACTERIZATION OF CARBON ELECTRODES WITH NANOPARTICLES OF NICKEL HYDROXIDE FOR SUPERCONDENSERS)

2020 ◽  
Author(s):  
Shyryn Nurbolat ◽  
Zhanar Kalkozova ◽  
Khabibulla Abdullin
Keyword(s):  
Cyclic Voltammetry ◽  
Nickel Hydroxide ◽  
Polyvinylidene Fluoride ◽  
Carbon Materials ◽  
Specific Capacity ◽  
Carbon Electrodes ◽  
Composite Electrodes ◽  
Galvanostatic Charge ◽  
Highly Dispersed ◽  
Charge Discharge

Composite electrodes for supercapacitors have been obtained, consisting of a matrix of highly dispersed carbon materials: microcrystalline graphite and multi-walled carbon nanotubes, also a filler of nanoparticles of nickel hydroxide. Β-Co (OH) 2 and β-Ni (OH) 2 nanopowders were obtained by chemical deposition from solution. To create the electrodes, a polyvinylidene fluoride polymer in the form of a powder was used as a bonding material. The main technological stages of the manufacture of electrodes were determined, the parameters of the obtained structures were measured by the method of cyclic voltammetry and galvanostatic charge-discharge. For the manufacture of carbon electrodes, the optimal ratios of highly dispersed carbon materials, a binder polymer and a solvent have been determined to create mechanically strong layers with high conductivity and capacity. The technique of creating capacitor structures and measuring the capacitance of the obtained electrochemical capacitors has been worked out. Capacitors made of highly dispersed carbon materials showed typical rectangular curves of cyclic voltammetry and a linear decay-rise of the galvanostatic charge-discharge dependences. Typical values of specific capacity ~ 50 F / g were obtained. Composite electrodes made of nickel hydroxide nanoparticles in a carbon matrix demonstrated an increase in capacitance to ~ 180 F / g. It is shown that composite electrodes are promising for creating capacitors with a high specific capacity.

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