Research of Pulse Current Charge Method for all Vanadium Redox Battery

2014 ◽  
Vol 971-973 ◽  
pp. 1121-1124
Author(s):  
Zhen Dong Sun ◽  
Sen Wang ◽  
Ye Qin ◽  
Jian Guo Liu ◽  
Chuan Wei Yan
Keyword(s):  
Pulse Current ◽  
Constant Voltage ◽  
Vanadium Redox Battery ◽  
Battery Charging ◽  
Discharge Performance ◽  
Pulse Charging ◽  
Discharge Efficiency ◽  
Vanadium Redox ◽  
Charge Discharge

From the perspective of vanadium battery charging-discharge efficiency, studies vanadium battery charging method by a series of charging and discharging tests, based on the principle of pulse, an pulse charging method with constant-voltage was introduced, compared with other charge method,the proposed method got the Stable discharge performance and the better charge-discharge efficiency.

scholarly journals Modification of Nafion® Membrane via a Sol-Gel Route for Vanadium Redox Flow Energy Storage Battery Applications

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Shu-Ling Huang ◽  
Hsin-Fu Yu ◽  
Yung-Sheng Lin
Keyword(s):  
Energy Efficiency ◽  
Coulombic Efficiency ◽  
Ion Selectivity ◽  
Sol Gel ◽  
Discharge Performance ◽  
Flow Energy ◽  
Modified Membrane ◽  
Vanadium Redox ◽  
Vanadium Ion ◽  
Charge Discharge

Nafion 117(N-117)/SiO2-SO3H modified membranes were prepared using the 3-Mercaptopropyltrimethoxysilane (MPTMS) to react with H2O2via in situ sol-gel route. Basic properties including water uptake, contact angle, ion exchange capacity (IEC), vanadium ion permeability, impedance, and conductivity were measured to investigate how they affect the charge-discharge characteristics of a cell. Furthermore, we also set a vanadium redox flow energy battery (VRFB) single cell by the unmodified/modified N-117 membranes as a separated membrane to test its charge/discharge performance and compare the relations among the impedance and efficiency. The results show that the appropriate amount of SiO2-SO3H led into the N-117 membrane contributive to the improvement of proton conductivity and vanadium ion selectivity. The permeability was effectively decreased from original 3.13 × 10−6 cm2/min for unmodified N-117 to 0.13 × 10−6 cm2/min for modified membrane. The IEC was raised from original 0.99 mmol/g to 1.24 mmol/g. The modified membrane showed a good cell performance in the VRFB charge/discharge experiment, and the maximum coulombic efficiency was up to 94%, and energy efficiency was 82%. In comparison with unmodified N-117, the energy efficiency of modified membrane had increased more than around 10%.

ChemInform Abstract: Charge-Discharge Performance of Electron-Beam-Deposited Tin Oxide Thin-Film Electrodes.

ChemInform ◽  
2010 ◽  
Vol 30 (9) ◽  
pp. no-no
Author(s):  
S. C. Nam ◽  
Y. H. Kim ◽  
W. I. Cho ◽  
B. W. Cho ◽  
H. S. Chun ◽  
...  
Keyword(s):  
Thin Film ◽  
Electron Beam ◽  
Tin Oxide ◽  
Oxide Thin Film ◽  
Discharge Performance ◽  
Thin Film Electrodes ◽  
Charge Discharge

Hybrid and Reconfigurable IPT Systems With High-Misalignment Tolerance for Constant-Current and Constant-Voltage Battery Charging

2018 ◽  
Vol 33 (10) ◽  
pp. 8259-8269 ◽  
Author(s):  
Yang Chen ◽  
Bin Yang ◽  
Zhihao Kou ◽  
Zhengyou He ◽  
Guangzhong Cao ◽  
...  
Keyword(s):  
Constant Current ◽  
Constant Voltage ◽  
Battery Charging

Study of field electron emission properties of commercial graphite cathodes in pulse-repetitive mode

2020 ◽  
Author(s):  
A.S. Chepusov ◽  
◽  
A.A. Komarskiy ◽  
S.R. Korzhenevskiy ◽  
O.D. Krasniy ◽  
...  
Keyword(s):  
Electron Emission ◽  
Pulse Current ◽  
Current Mode ◽  
Operating Voltage ◽  
Constant Voltage ◽  
Periodic Mode ◽  
Field Emitters ◽  
Pulsed Mode ◽  
Field Emission Cathodes ◽  
Potential Level

The article considers field emission cathodes from industrial graphites MG, MPG-7, and GMZ operated in the pulse-periodic mode with the pulse repetitionrate of 1 to 30 Hz. The operation of field emitters in the pulsed mode differs from operation at a constant voltage. Under stabilization of the high potential level, the amplitude of the pulses of the emission current decreases that leads to increasing the operating voltage in the pulsed mode. During operation of the graphite cathode (when the pulse current is recorded), the operating voltage at the anode stabilizes and oscillates within 5%. Operation in the direct current mode under similar conditions is accompanied by a change in the voltage value by more than 10 %.

scholarly journals Sustainable Anodes for Lithium- and Sodium-Ion Batteries Based on Coffee Ground-Derived Hard Carbon and Green Binders

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6216
Author(s):  
Hamideh Darjazi ◽  
Antunes Staffolani ◽  
Leonardo Sbrascini ◽  
Luca Bottoni ◽  
Roberto Tossici ◽  
...  
Keyword(s):  
Food Waste ◽  
Anode Materials ◽  
Active Material ◽  
Added Value ◽  
Hard Carbon ◽  
Great Opportunity ◽  
Discharge Performance ◽  
Coffee Ground ◽  
Li Ion ◽  
Charge Discharge

The reuse and recycling of products, leading to the utilization of wastes as key resources in a closed loop, is a great opportunity for the market in terms of added value and reduced environmental impact. In this context, producing carbonaceous anode materials starting from raw materials derived from food waste appears to be a possible approach to enhance the overall sustainability of the energy storage value chain, including Li-ion (LIBs) and Na-ion batteries (NIBs). In this framework, we show the behavior of anodes for LIBs and NIBs prepared with coffee ground-derived hard carbon as active material, combined with green binders such as Na-carboxymethyl cellulose (CMC), alginate (Alg), or polyacrylic acid (PAA). In order to evaluate the effect of the various binders on the charge/discharge performance, structural and electrochemical investigations are carried out. The electrochemical characterization reveals that the alginate-based anode, used for NIBs, delivers much enhanced charge/discharge performance and capacity retention. On the other hand, the use of the CMC-based electrode as LIBs anode delivers the best performance in terms of discharge capacity, while the PAA-based electrode shows enhanced cycling stability. As a result, the utilization of anode materials derived from an abundant food waste, in synergy with the use of green binders and formulations, appears to be a viable opportunity for the development of efficient and sustainable Li-ion and Na-ion batteries.

Excellent energy storage density and charge–discharge performance of a novel Bi0.2Sr0.7TiO3–BiFeO3 thin film

2019 ◽  
Vol 7 (35) ◽  
pp. 10891-10900 ◽  
Author(s):  
Baijie Song ◽  
Shuanghao Wu ◽  
Feng Li ◽  
Pan Chen ◽  
Bo Shen ◽  
...  
Keyword(s):  
Thin Film ◽  
Energy Storage ◽  
Spin Coating ◽  
Sol Gel ◽  
Energy Storage Density ◽  
Ultrahigh Energy ◽  
Discharge Performance ◽  
Storage Density ◽  
Good Thermal Stability ◽  
Charge Discharge

A novel Bi0.2Sr0.7TiO3–BiFeO3 thin film prepared by sol–gel/spin coating possesses ultrahigh energy storage density, good thermal stability and excellent charge–discharge performance.

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