A durable VO2(M)/Zn battery with ultrahigh rate capability enabled by pseudocapacitive proton insertion

2020 ◽  
Vol 8 (4) ◽  
pp. 1731-1740 ◽  
Author(s):  
Lishang Zhang ◽  
Ling Miao ◽  
Bao Zhang ◽  
Jinsong Wang ◽  
Jia Liu ◽  
...  
Keyword(s):  
Current Density ◽  
Cathode Surface ◽  
High Current Density ◽  
Rate Capability ◽  
Electrochemical Process ◽  
High Current ◽  
Long Term Stability ◽  
Hydrate Deposition ◽  
Sulfate Hydrate

Reversible hydroxyzinc sulfate hydrate deposition/dissolution in electrochemical process could be observed on cathode surface. Good long term stability retention could also be achieved at high current density of 20 A g−1.

A carbon nanotube field emission cathode with high current density and long-term stability

2009 ◽  
Vol 20 (32) ◽  
pp. 325707 ◽  
Author(s):  
Xiomara Calderón-Colón ◽  
Huaizhi Geng ◽  
Bo Gao ◽  
Lei An ◽  
Guohua Cao ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Field Emission ◽  
Current Density ◽  
High Current Density ◽  
High Current ◽  
Field Emission Cathode ◽  
Term Stability ◽  
Long Term Stability ◽  
Emission Cathode

scholarly journals Hierarchical Porous Carbon Derived from Sichuan Pepper for High-Performance Symmetric Supercapacitor with Decent Rate Capability and Cycling Stability

Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 553 ◽  
Author(s):  
Hengshuo Zhang ◽  
Wei Xiao ◽  
Wenjie Zhou ◽  
Shanyong Chen ◽  
Yanhua Zhang
Keyword(s):  
Specific Capacitance ◽  
Current Density ◽  
High Performance ◽  
High Current Density ◽  
Rate Capability ◽  
Cycling Stability ◽  
Koh Activation ◽  
High Current ◽  
Symmetric Supercapacitor ◽  
Hierarchical Porous

Hierarchical micro-mesoporous carbon (denoted as HPC-2 in this study) was synthesized by pre-carbonization of biomass Sichuan pepper followed by KOH activation. It possessed well-developed porosity with the specific surface area of 1823.1 m2 g−1 and pore volume of 0.906 cm3 g−1, and exhibited impressive supercapacitive behaviors. For example, the largest specific capacitance of HPC-2 was tested to be ca. 171 F g−1 in a three-electrode setup with outstanding rate capability and stable electrochemical property, whose capacitance retention was near 100% after cycling at rather a high current density of 40 A g−1 for up to 10,000 cycles. Furthermore, a two-electrode symmetric supercapacitor cell of HPC-2//HPC-2 was constructed, which delivered the maximum specific capacitance and energy density of ca. 30 F g−1 and 4.2 Wh kg−1, respectively, had prominent rate performance and cycling stability with negligible capacitance decay after repetitive charge/discharge at a high current density of 10 A g−1 for over 10,000 cycles. Such electrochemical properties of HPC-2 in both three- and two-electrode systems are superior or comparable to those of a great number of porous biomass carbon reported previously, hence making it a promising candidate for the development of high-performance energy storage devices.

Excellent performance of carbon-coated TiO2/Li4Ti5O12 composites with low Li/Ti ratio for Li-ion storage

RSC Advances ◽  
2015 ◽  
Vol 5 (113) ◽  
pp. 93155-93161 ◽  
Author(s):  
Wei Yang ◽  
Xue Bai ◽  
Tao Li ◽  
Yuan-Yuan Ma ◽  
Yong-Xin Qi ◽  
...  
Keyword(s):  
Current Density ◽  
High Current Density ◽  
Cycling Performance ◽  
High Rate ◽  
High Current ◽  
Excellent Performance ◽  
Ion Storage ◽  
Carbon Coated ◽  
Li Ion

Carbon-coated TiO2/Li4Ti5O12 composites with Li : Ti = 4 : 8 display high rate capacities and excellent long-term cycling performance at high current density.

Molybdenum diselenide/reduced graphene oxide based hybrid nanosheets for supercapacitor applications

2016 ◽  
Vol 45 (23) ◽  
pp. 9646-9653 ◽  
Author(s):  
Suresh Kannan Balasingam ◽  
Jae Sung Lee ◽  
Yongseok Jun
Keyword(s):  
Graphene Oxide ◽  
High Current Density ◽  
Hydrothermal Process ◽  
High Current ◽  
Long Term Stability ◽  
Reduced Graphene ◽  
Molybdenum Diselenide ◽  
Supercapacitor Applications ◽  
Facile Hydrothermal Process

The hybrid MoSe2/rGO nanosheets were synthesized via a facile hydrothermal process. The hybrid nanosheets electrode showed enhanced specific capacitance value than that of the pristine MoSe2. The MoSe2/rGO nanosheets exhibited increasing capacitance retention of up to 180% for the long-term stability test of 10,000 cycles at high current density.

Low-Temperature Hydrothermal Synthesis and Electrochemical Properties of Birnessit-Type Manganese Dioxide Nanosheets

2013 ◽  
Vol 800 ◽  
pp. 393-397 ◽  
Author(s):  
De Yan ◽  
Ying Liu ◽  
Zhi Guo Wu ◽  
Ren Fu Zhuo ◽  
Jun Wang
Keyword(s):  
Low Temperature ◽  
Current Density ◽  
High Current Density ◽  
Hydrothermal Process ◽  
Rate Capability ◽  
High Specific Capacitance ◽  
High Current ◽  
Cycle Stability ◽  
Good Rate Capability ◽  
A Current

Birnessite MnO2 nanosheets were synthesized by self-limiting deposition of KMnO4 in a facile low-temperature hydrothermal process. The MnO2 electrode exhibits a high specific capacitance of 169 F g-1 at a current density of 0.1 A g-1, good rate capability with a capacitance of 96 F g-1 even at a high current density of 5 A g-1, as well as excellent cycle stability with capacitance retention of 94% at 1 A g-1 after 1,000 cycles.

scholarly journals Study of J-E Curve with Hysteresis of Carbon Nanotubes Field Emitters

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Shama Parveen ◽  
Samina Husain ◽  
Avshish Kumar ◽  
Javid Ali ◽  
Harsh ◽  
...  
Keyword(s):  
Field Emission ◽  
Current Density ◽  
High Current Density ◽  
Emission Measurement ◽  
Si Substrate ◽  
Long Term Stability ◽  
Site Density ◽  
Field Emitters ◽  
Raman Study

We observe hysteresis in J-E plot during field emission measurement of CNTs grown by LPCVD technique. CNTs are synthesized on Fe-coated Si substrate at 650°C. SEM and Raman study confirm that CNTs are successfully grown on Si substrate by LPCVD technique. In this study, we find that ramp-down curve has higher value of current density than ramp-up curve which indicates that CNTs show positive hysteresis. Our results show that a high current density at low turn-on voltage is obtained in ramp-down step of J-E plot which may be since not all CNTs contribute in ramp-up step process. But in ramp-down step all CNTs contribute as field emitters due to high electric field treatment. We also performed stability analysis of CNTs with current at constant applied voltage for 5 hrs and find that the sample shows long-term stability due to increase in emitting site density since a large number of CNTs participate in field emission.

scholarly journals Long-Term Electrically Stable Silver Nanowire Composite Transparent Electrode Under High Current Density

2021 ◽  
Author(s):  
Kaiqing Wang ◽  
Yunxia Jin ◽  
Fei Xiao
Keyword(s):  
Current Density ◽  
Composite Electrode ◽  
High Current Density ◽  
Transparent Electrode ◽  
Silver Nanowire ◽  
Electrical Performance ◽  
High Current ◽  
Electrical Stability ◽  
Current Stress

Abstract Silver nanowire (AgNW) network has been employed to many electronic devices as transparent electrode. However, the poor electrical stability under current has been seriously holding its practical application, and we still lack long-term electrically stable AgNW system to study the underlying fundamental of electrical failure. In this work, the electrical performance and failure mechanism of chitosan-ascorbic acid (Chi-AsA)/AgNW composite under current stress were thoroughly studied. The composite electrode maintained stability above 24000 h under high current density of 100 mA cm-1. The main failure in AgNW composite is found to be a wave break perpendicular to the current rather than traditional uniform degradation across AgNW networks. More interestingly, the AgNWs in failed composite electrode kept their original smooth morphology excepting the crack area, while the AgNWs in pristine networks degraded to nanoparticles or became disconnected everywhere. The patterned AgNW composite in microscale exhibits similar long lifetime in resisting current stress as the bulk composite film. The effect of over-coating position, electrical stress, temperature and over-coating materials on the electrical stability were studied. The over-coating layer of Chi-AsA is proven to suppress the silver atoms from migration, reduce the concentrated Joule heating at junctions, and inhibit the corrosion. The Chi-AsA/AgNW composite enables electrically stable transparent conductor for next-generation optoelectronics, and the mechanism investigation may provide effective means of preparing electrically stable AgNW systems.

High-Mobility Stable 1200-V, 150-A 4H-SiC DMOSFET Long-Term Reliability Analysis Under High Current Density Transient Conditions

2015 ◽  
Vol 30 (6) ◽  
pp. 2891-2895 ◽  
Author(s):  
James A. Schrock ◽  
William B. Ray II ◽  
Kevin Lawson ◽  
Argenis Bilbao ◽  
Stephen B. Bayne ◽  
...  
Keyword(s):  
Reliability Analysis ◽  
Current Density ◽  
High Current Density ◽  
High Mobility ◽  
High Current ◽  
Transient Conditions
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