Research on Rechargeable Lithium Manganese Battery Material Electrochemical Roasting Performance Analysis

2012 ◽  
Vol 455-456 ◽  
pp. 889-894
Author(s):  
Qian Xiang
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Chemical Properties ◽  
Superior Performance ◽  
Lithium Aluminum ◽  
Synthetic Material ◽  
Synthetic Sample ◽  
Lithium Manganese ◽  
Battery Material ◽  
Button Batteries

As anode material of battery, manganese dioxide has been widely used in zinc-manganese and lithium–manganese primary battery. To meet new electrical products’ requirements on high-performance battery, research on rechargeable lithium manganese button batteries with extensive operating temperature, superior-performance comprehensive electrochemistry and low cost has drawn attention from more and more researchers. This article has analyzed physical and chemical properties of lithium manganese composite oxides synthetic material, assembled lithium button batteries by synthetic sample and lithium aluminum alloy and discussed its electrochemistry performance, based on confirmed material proportioning, discussed the influence of roasting condition on synthetic material performance from physical & chemical properties and electrochemistry properties, and confirmed best roasting temperature and roasting time.

scholarly journals Review on Carbon/Polyaniline Hybrids: Design and Synthesis for Supercapacitor

Molecules ◽  
2019 ◽  
Vol 24 (12) ◽  
pp. 2263 ◽  
Author(s):  
Xiaoning Wang ◽  
Dan Wu ◽  
Xinhui Song ◽  
Wei Du ◽  
Xiangjin Zhao ◽  
...  
Keyword(s):  
Energy Storage ◽  
Hybrid Materials ◽  
Active Sites ◽  
High Performance ◽  
Electrode Materials ◽  
Carbon Materials ◽  
Low Cost ◽  
Specific Capacity ◽  
Chemical Properties ◽  
Combine Carbon

Polyaniline has been widely used in high-performance pseudocapacitors, due to its low cost, easy synthesis, and high theoretical specific capacitance. However, the poor mechanical properties of polyaniline restrict its further development. Compared with polyaniline, functionalized carbon materials have excellent physical and chemical properties, such as porous structures, excellent specific surface area, good conductivity, and accessibility to active sites. However, it should not be neglected that the specific capacity of carbon materials is usually unsatisfactory. There is an effective strategy to combine carbon materials with polyaniline by a hybridization approach to achieve a positive synergistic effect. After that, the energy storage performance of carbon/polyaniline hybridization material has been significantly improved, making it a promising and important electrode material for supercapacitors. To date, significant progress has been made in the synthesis of various carbon/polyaniline binary composite electrode materials. In this review, the corresponding properties and applications of polyaniline and carbon hybrid materials in the energy storage field are briefly reviewed. According to the classification of different types of functionalized carbon materials, this article focuses on the recent progress in carbon/polyaniline hybrid materials, and further analyzes their corresponding properties to provide guidance for the design, synthesis, and component optimization for high-performance supercapacitors.

A 3‐dB Quadrature WLP Coupler for 60 GHz Applications

2012 ◽  
Vol 1427 ◽  
Author(s):  
Hamid Kiumarsi ◽  
Hiroyuki Ito ◽  
Noboru Ishihara ◽  
Kenichi Okada ◽  
Yusuke Uemichi ◽  
...  
Keyword(s):  
Insertion Loss ◽  
High Performance ◽  
Low Cost ◽  
Phase Error ◽  
Superior Performance ◽  
60 Ghz ◽  
Wafer Level ◽  
Chip Area ◽  
Wafer Level Packaging ◽  
Coupled Lines

ABSTRACTA 60 GHz tandem coupler using offset broadside coupled lines is proposed in a WLP (Wafer Level Packaging) technology. The fabricated coupler has a core chip area of 750 μm × 385 μm (0.288 mm2). The measured results show an insertion loss of 0.44 dB, an amplitude imbalance of 0.03 dB and a phase difference of 87.6° at 60 GHz. Also the measurement shows an insertion loss of less than 0.67 dB, an amplitude imbalance of less than 0.31 dB, a phase error of less than 3.7°, an isolation of more than 29.7 dB and a return loss of more than 27.9 dB at the input ant coupled ports and more than 14.3 dB at the direct and isolated ports over the frequency band of 57-66 GHz, covering 60 GHz band both in Japan and US. To the best of our knowledge the proposed coupler achieves the lowest ever reported insertion loss and amplitude imbalance for a 3-dB coupler on a silicon substrate. With its superior performance and lower cost compared to the CMOS counterparts, the proposed coupler is a suitable candidate for low-cost high-performance millimeter-wave systems.

Low-cost, highly sensitive and stable pressure sensor based on glass fiber surfacing mat coated with graphene

2019 ◽  
Vol 13 (02) ◽  
pp. 2051002
Author(s):  
Shaowei Lu ◽  
Junchi Ma ◽  
Keming Ma ◽  
Shuai Wang ◽  
Xiangdong Yang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Glass Fiber ◽  
Pressure Sensor ◽  
High Performance ◽  
Low Cost ◽  
Epoxy Group ◽  
Pressure Sensors ◽  
Superior Performance ◽  
Filtration Method ◽  
Potential Applications

High-performance pressure sensors have caused widespread concern due to the potential applications in 3D-touch technology and wearable electronic devices. Herein, a new type of graphene pressure sensor based on the glass fiber surfacing mat coated with graphene oxide aqueous solution by a spray-vacuum filtration method and HI acid reduction method is reported. It is a simple and highly effective method to reduce graphene oxide films into highly conductive graphene films without destroying their integrity and flexibility at a low temperature based on the nucleophilic substitution reaction. The FTIR, SEM and conductivity tests indicate that the optimum time for graphene oxide to be reduced is 30[Formula: see text]min, under this condition enter the epoxy group has been reacted without damaging the regular sp2 hybrid C atom structure in graphene. The conductivity of the graphene pressure sensor is increased significantly to 23260[Formula: see text]S/m. The monotonic compressing test for 100[Formula: see text]Pa/s and the test of the metal block placement and removal demonstrate that the sensor exhibits relatively high linearity of 99.74% between the response and pressure, the advantage makes the sensor monitor pressure more accurately. More importantly, the pressure sensor based on the glass fiber surfacing mat coated with graphene shows extremely high sensitivity (0.169[Formula: see text][Formula: see text]), fast response time (251[Formula: see text]ms) and good stability for 1000 cycles. Based on its superior performance, it also demonstrates potential applications in measuring pressure and human body’s motions.

scholarly journals Organic Electrode Materials for Non-aqueous K-Ion Batteries

2020 ◽  
Author(s):  
Mingtan Wang ◽  
Wenjing Lu ◽  
Huamin Zhang ◽  
Xianfeng Li
Keyword(s):  
Performance Improvement ◽  
High Performance ◽  
Electrode Materials ◽  
Low Cost ◽  
Superior Performance ◽  
Large Radius ◽  
Li Ion Batteries ◽  
Organic Electrode ◽  
Structure Flexibility ◽  
Li Ion

Abstract The demands for high-performance and low-cost batteries make K-ion batteries (KIBs) considered as promising supplements or alternatives for Li-ion batteries (LIBs). Nevertheless, there are only a small amount of conventional inorganic electrode materials that can be used in KIBs, due to the large radius of K+ ions. Differently, organic electrode materials (OEMs) generally own sufficiently interstitial space and good structure flexibility, which can maintain superior performance in K-ion systems. Therefore, in recent years, more and more investigations have been focused on OEMs for KIBs. This review will comprehensively cover the researches on OEMs in KIBs in order to accelerate the research and development of KIBs. The reaction mechanism, electrochemical behavior, etc., of OEMs will all be summarized in detail and deeply. Emphasis is placed to overview the performance improvement strategies of OEMs and the characteristic superiority of OEMs in KIBs compared with LIBs and Na-ion batteries.

scholarly journals Ampoule method fabricated sulfur vacancy-rich N-doped ZnS electrodes for ammonia production in alkaline media

2021 ◽  
Vol 10 (2) ◽  
Author(s):  
Da-Ming Feng ◽  
Ying Sun ◽  
Zhong-Yong Yuan ◽  
Yang Fu ◽  
Baohua Jia ◽  
...  
Keyword(s):  
Active Sites ◽  
High Performance ◽  
Low Cost ◽  
Metal Sulfide ◽  
Catalytic Performance ◽  
Reduction Reaction ◽  
Alkaline Media ◽  
Superior Performance ◽  
Zinc Electrode ◽  
Faradaic Efficiency

AbstractThe electrochemical production of green and low-cost ammonia requests the development of high-performance electrocatalysts. In this work, the ampoule method was applied to modulate the surface of the zinc electrode by implanting defects and low-valent active sites. The N-doped ZnS electrocatalyst was thus generated by sulfurization with thiourea and applied for electrocatalytic nitrogen reduction reaction (ENRR). Given the rich sulfur vacancies and abundant Zn-N active sites on the surface, excellent catalytic activity and selectivity were obtained, with an NH3 yield rate of 2.42 × 10–10 mol s−1 cm−2 and a Faradaic efficiency of 7.92% at − 0.6 V vs. RHE in 0.1 M KOH solution. Moreover, the as-synthesized zinc electrode exhibits high stability after five recycling tests and a 24 h potentiostatic test. The comparison with Zn foil, non-doping ZnS/Zn and recent metal sulfide electrocatalysts further demonstrated advanced catalytic performance of N@ZnS/Zn for ENRR. By simple synthesis, S vacancies, and N-doping defects, this promising electrocatalyst would represent a good addition to the arena of transition-metal-based catalysts with superior performance in ENRR. Graphic abstract

scholarly journals Progress towards High-Efficiency and Stable Tin-Based Perovskite Solar Cells

Energies ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 5092 ◽  
Author(s):  
Syed Afaq Ali Shah ◽  
Muhammad Hassan Sayyad ◽  
Karim Khan ◽  
Kai Guo ◽  
Fei Shen ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Performance ◽  
High Efficiency ◽  
Low Cost ◽  
Perovskite Solar Cells ◽  
Chemical Properties ◽  
Group Iv ◽  
Absorbing Layer ◽  
The Stability ◽  
Stability Issues

Since its invention in 2009, Perovskite solar cells (PSCs) has attracted great attention because of its low cost, numerous options of efficiency enhancement, ease of manufacturing and high-performance. Within a short span of time, the PSC has already outperformed thin-film and multicrystalline silicon solar cells. A current certified efficiency of 25.2% demonstrates that it has the potential to replace its forerunner generations. However, to commercialize PSCs, some problems need to be addressed. The toxic nature of lead which is the major component of light absorbing layer, and inherited stability issues of fabricated devices are the major hurdles in the industrialization of this technology. Therefore, new researching areas focus on the lead-free metal halide perovskites with analogous optical and photovoltaic performances. Tin being nontoxic and as one of group IV(A) elements, is considered as the most suitable alternate for lead because of their similarities in chemical properties. Efficiencies exceeding 13% have been recorded using Tin halide perovskite based devices. This review summarizes progress made so far in this field, mainly focusing on the stability and photovoltaic performances. Role of different cations and their composition on device performances and stability have been involved and discussed. With a considerable room for enhancement of both efficiency and device stability, different optimized strategies reported so far have also been presented. Finally, the future developing trends and prospects of the PSCs are analyzed and forecasted.

Research on the Changes of Physico-Chemical Properties of Lead-Acid Batteries

2015 ◽  
Vol 768 ◽  
pp. 197-203
Author(s):  
Chuan Min Chen ◽  
Jing Zhang ◽  
Li Na Zhu ◽  
Song Tao Liu
Keyword(s):  
Water Loss ◽  
High Performance ◽  
Low Cost ◽  
Chemical Properties ◽  
Operating Conditions ◽  
Lead Acid Battery ◽  
Lead Acid Batteries ◽  
Physico Chemical ◽  
Battery Capacity ◽  
Lead Acid

Lead-acid batteries were widely used in many industries as important power supply devices for military and civil industries, transport and shipment devices owing to its advantages of low cost,high performance and safety. According to statistics, most lead-acid batteries can reach 1-2 years life under operating conditions, generating millions of used lead-acid batteries each year in China, which caused economic and environmental losses if not properly treated. The changes of physico-chemical properties in the process of operation of lead-acid battery were summarized in this paper. The corrosion and deformation of grids, water loss in electrolyte, aging of separators, corrosion of plates and irreversible sulfation were the main physico-chemical properties changes resulting in battery failure. In the homogeneous acidic medium, the grid of the lead-acid battery corroded away, one side was dotted distribution, and the other side was interlaced net shape. The corrosion of grids and incomplete reaction may lead to the water loss in electrolyte. What’s more, there existed a series of chemical reactions that reducing the battery capacity and leading to the failure of batteries, such as the aging and elastic collision of separators and irreversible sulfation. By analyzing the physico-chemical properties changes in the process of operation, the study supplied the direction for the specification of operating conditions and the extending of service life of lead-acid battery. The basic theories were provided for the repair, regeneration and recovery of lead-acid batteries.

scholarly journals Leverage Surface Chemistry for High-Performance Triboelectric Nanogenerators

2020 ◽  
Vol 8 ◽  
Author(s):  
Jing Xu ◽  
Yongjiu Zou ◽  
Ardo Nashalian ◽  
Jun Chen
Keyword(s):  
Surface Chemistry ◽  
High Performance ◽  
Low Cost ◽  
Flexible Structures ◽  
Chemical Properties ◽  
Electrical Energy ◽  
Active Sensors ◽  
Power Sources ◽  
Self Powered ◽  
Triboelectric Nanogenerators

Triboelectric Nanogenerators (TENGs) are a highly efficient approach for mechanical-to-electrical energy conversion based on the coupling effects of contact electrification and electrostatic induction. TENGs have been intensively applied as both sustainable power sources and self-powered active sensors with a collection of compelling features, including lightweight, low cost, flexible structures, extensive material selections, and high performances at low operating frequencies. The output performance of TENGs is largely determined by the surface triboelectric charges density. Thus, manipulating the surface chemical properties via appropriate modification methods is one of the most fundamental strategies to improve the output performances of TENGs. This article systematically reviews the recently reported chemical modification methods for building up high-performance TENGs from four aspects: functional groups modification, ion implantation and decoration, dielectric property engineering, and functional sublayers insertion. This review will highlight the contribution of surface chemistry to the field of triboelectric nanogenerators by assessing the problems that are in desperate need of solving and discussing the field's future directions.

scholarly journals CoSe2/graphene composite: a low-cost, high performance counter electrode for dye sensitized solar cells

2021 ◽  
Vol 2070 (1) ◽  
pp. 012078
Author(s):  
C. Tamilselvi ◽  
P. Duraisamy ◽  
N. Subathra ◽  
T. Sumathi ◽  
R Sonia Fredrick
Keyword(s):  
Solar Cells ◽  
High Performance ◽  
Counter Electrode ◽  
Low Cost ◽  
Dye Sensitized Solar Cells ◽  
Chemical Properties ◽  
Dye Sensitized ◽  
Bet Analysis ◽  
Electron Hole Pair ◽  
Sensitized Solar Cells

Abstract In this study, Pt-free dye-sensitized solar cells (DSSCs) were fabricated using cobalt selenide (CoSe2)/graphene sheets using facile hydrothermal technique. The Pt free counter electrode (CE) was systematically investigated their physico-chemical properties by using SEM, TEM, XRD, Raman, UV, PL, XPS and BET analysis. Under typical AM 1.5G illumination, the DSSC based on the CoSeSe2 counter electrode achieves a maximum PCE of 12.2 % (Jsc = 22.3 mA/cm2, Voc= 810 mV, and FF= 0.71), which is 5.8 times higher than that of conventional Pt-based DSSC. The improved electro catalytic activity and photo conversion efficiency of the CoSeSe2/graphene CE is due to prevent the recombination of electron-hole pair and extended the visible light absorption of composite samples.

SILICA GRAFTED WITH EPOXIDIZED LIQUID POLYBUTADIENES: ITS BEHAVIOR AS FILLER FOR TIRE TREAD COMPOUNDS

2017 ◽  
Vol 90 (1) ◽  
pp. 173-194 ◽  
Author(s):  
Marcus V. Braum ◽  
Marly A. M. Jacobi
Keyword(s):  
High Performance ◽  
Silica Surface ◽  
Low Cost ◽  
Cure Kinetics ◽  
Silica Coating ◽  
Superior Performance ◽  
Rubber Matrix ◽  
Precipitated Silica ◽  
Safety Features ◽  
Environmentally Friendly Process

ABSTRACT Achieving high polymer-filler interaction and lowering the energy consumption required to disperse precipitated silica in a rubber matrix have been the main motivations behind the recent interest in silica-coating processes. A simple, low-cost, and environmentally friendly process is available to graft epoxidized liquid polybutadienes onto a silica surface. The polymer-grafted silicas are applied as reinforcing fillers in typical car tire tread compounds. The processability, cure kinetics, and properties of the vulcanizates are greatly affected by the degree of epoxidation, molar mass, and microstructure of the epoxidized polybutadienes used for coating the silica surface. The dynamic-mechanical behavior is superior to that of the reference compound, using bis-[triethoxysilylpropyl] tetrasulfide as a coupling agent, in stiffness and hysteresis at low temperatures, which is indicative of superior performance in wet grip and emergency maneuvers (hard-handling). Thus, the use of this reinforcement system for high-performance car tires, for which safety features should be prioritized, is promising.

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