scholarly journals Achieving Ultrahigh Output Energy Density of Triboelectric Nanogenerators in High‐Pressure Gas Environment

2020 ◽  
Vol 7 (24) ◽  
pp. 2001757
Author(s):  
Jingjing Fu ◽  
Guoqiang Xu ◽  
Changheng Li ◽  
Xin Xia ◽  
Dong Guan ◽  
...  
Keyword(s):  
High Pressure ◽  
Energy Density ◽  
Output Energy ◽  
Gas Environment ◽  
Triboelectric Nanogenerators

scholarly journals Proposal of Design Method Enabling Cr-Mo Steels to be Used in High-Pressure Hydrogen Gas Environment

Hyomen Kagaku ◽  
2015 ◽  
Vol 36 (11) ◽  
pp. 562-567
Author(s):  
Hisao MATSUNAGA ◽  
Junichiro YAMABE ◽  
Saburo MATSUOKA
Keyword(s):  
High Pressure ◽  
Design Method ◽  
Hydrogen Gas ◽  
Gas Environment ◽  
Pressure Hydrogen

High-pressure new phase of AgN3

2021 ◽  
pp. 2150386
Author(s):  
Shifeng Niu ◽  
Ran Liu ◽  
Xuhan Shi ◽  
Zhen Yao ◽  
Bingbing Liu ◽  
...  
Keyword(s):  
High Pressure ◽  
Energy Density ◽  
Density Functional ◽  
High Energy ◽  
High Energy Density ◽  
Detonation Properties ◽  
Ambient Conditions ◽  
Structure Search ◽  
Enthalpy Difference ◽  
High Energy Density Material

The structural evolutionary behaviors of AgN3 have been studied by using the particle swarm optimization structure search method combined with the density functional theory. One stable high-pressure metal polymeric phase with the [Formula: see text] space group is suggested. The enthalpy difference analysis indicates that the Ibam-AgN3 phase will transfer to the I4/mcm-AgN3 phase at 4.7 GPa and then to the [Formula: see text]-AgN3 phase at 24 GPa. The [Formula: see text]-AgN3 structure is composed of armchair–antiarmchair N-chain, in which all the N atoms are sp2 hybridization. The inherent stability of the armchair–antiarmchair chain and the anion–cation interaction between the N-chain and Ag atom induce a high stability of the [Formula: see text]-AgN3 phase, which can be captured at ambient conditions and hold its stable structure up to 1400 K. The exhibited high energy density (1.88 KJ/g) and prominent detonation properties ([Formula: see text] Km/s; [Formula: see text] GPa) of the [Formula: see text]-AgN3 phase make it a potentially high energy density material.

Infiltration pressure of a nanoporous liquid spring modified by an electrolyte

2007 ◽  
Vol 22 (3) ◽  
pp. 644-648 ◽  
Author(s):  
A. Han ◽  
Y. Qiao
Keyword(s):  
Sodium Chloride ◽  
Energy Density ◽  
Cation Exchange ◽  
Sorption Isotherm ◽  
Temperature Sensitivity ◽  
Electrolyte Concentration ◽  
External Pressure ◽  
Output Energy ◽  
Working Pressure ◽  
Infiltration Pressure

In a hydrophobic zeolite, the infiltration and defiltration of water can be controlled by adjusting external pressure, and therefore the system behaves as a “liquid spring.” Since the hysteresis of sorption isotherm is negligible and the working pressure is thermally controllable, volume memory devices can be developed based on this phenomenon. With the addition of sodium chloride, both infiltration and defiltration pressures increase, which should be attributed to the cation exchange. The temperature sensitivity of the system increases with the electrolyte concentration, beneficial to improving the output energy density.

scholarly journals ESTIMATION OF NUCLEAR FUSION REQUIREMENTS IN BUBBLES DURING ULTRA-HIGH-PRESSURE, ULTRA-HIGH-TEMPERATURE CAVITATION PROMOTED BY MAGNETIC FIELD

2022 ◽  
Vol 5 (6) ◽  
pp. 102-115
Author(s):  
Toshihiko Yoshimura ◽  
Masataka Ijiri ◽  
Kazunori Sato
Keyword(s):  
Magnetic Field ◽  
High Pressure ◽  
High Temperature ◽  
Energy Density ◽  
Strong Magnetic Field ◽  
Threshold Value ◽  
Charged Species ◽  
Ultra High Pressure ◽  
Jet Nozzle ◽  
The Magnetic Field

In the present work, a strong magnetic field was applied near the outlet of the water jet nozzle to promote the generation of multifunction cavitation bubbles. Because these bubbles contained charged species, the bubbles experienced a Lorentz force due to the magnetic field and collided with greater force. As such, the internal bubble pressure exceeded the threshold value required for fusion to occur. The expansion of these charged bubbles in response to ultrasonic irradiation affected adjacent charged bubbles so that the energy density of the atoms in the bubbles was greater than the fusion threshold. The results of this work strongly suggest that the formation of bubbles via the UTPC process in conjunction with a strong magnetic field may result in bubble fusion.

A compact triboelectric nanogenerator with ultrahigh output energy density of 177.8 J m-3 via retarding air breakdown

Nano Energy ◽  
2021 ◽  
pp. 106891
Author(s):  
Zeyuan Cao ◽  
Zibo Wu ◽  
Rong Ding ◽  
Shiwen Wang ◽  
Yao Chu ◽  
...  
Keyword(s):  
Energy Density ◽  
Output Energy ◽  
Triboelectric Nanogenerator ◽  
Air Breakdown

Effect of δ-ferrite on susceptibility to hydrogen embrittlement of 304 austenitic stainless steel in high-pressure hydrogen atmosphere

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Fan Bao ◽  
Kaiyu Zhang ◽  
Zhengrong Zhou ◽  
Wenli Zhang ◽  
Xiao Cai ◽  
...  
Keyword(s):  
High Pressure ◽  
Stainless Steel ◽  
Fatigue Crack ◽  
Hydrogen Embrittlement ◽  
Hydrogen Gas ◽  
304 Stainless Steel ◽  
Content Type ◽  
Gas Environment ◽  
Type 304 ◽  
Pressure Hydrogen

Purpose The purpose of this paper is to demonstrate the effect of δ-ferrite on the susceptibility to hydrogen embrittlement of type 304 stainless steel in hydrogen gas environment. Design/methodology/approach The mechanical properties of as-received and solution-treated specimens were investigated by the test of tensile and fatigue crack growth (FCG) in 5 MPa argon and hydrogen. Findings The presence of δ-ferrite reduced the relative elongation and the relative reduction area (H2/Ar) of 304 stainless steel, indicating that δ-ferrite increased the susceptibility of hydrogen embrittlement in 304 stainless steel. Moreover, δ-ferrite promoted the fatigue crack initiation and propagation at the interface between δ-ferrite and austenite. The FCG tests were used to investigate the effect of δ-ferrite on the FCG rate in hydrogen gas environment, and it was found that δ-ferrite accelerated the FCG rate, which was attributed to rapid diffusion and accumulation of hydrogen around the fatigue crack tip through δ-ferrite in high-pressure hydrogen gas environment. Originality/value The dependence of the susceptibility to hydrogen embrittlement on δ-ferrite was first investigated in type 304 steel in hydrogen environment with high pressures, which provided the basis for the design and development of a high strength, hydrogen embrittle-resistant austenitic stainless steel.

High Voltage Output/Energy Density Flexible Asymmetric Fiber Supercapacitors Based on Tree-Like Topology

2021 ◽  
Author(s):  
Guangwei Shao ◽  
Chuanli Su ◽  
Jianna Li ◽  
Yaoli Huang ◽  
Qinghua Yu ◽  
...  
Keyword(s):  
Energy Density ◽  
High Voltage ◽  
Output Energy ◽  
Voltage Output
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