Preparation and Characterization of High Temperature Thermoelectrics Based on Metal/Oxide Nanocomposites

2007 ◽  
Vol 1044 ◽  
Author(s):  
Otto J. Gregory ◽  
Ximing Chen ◽  
Gustave C. Fralick ◽  
John Wrbanek
Keyword(s):  
High Temperature ◽  
Energy Harvesting ◽  
Metal Oxide ◽  
Partial Pressure ◽  
Thermoelectric Properties ◽  
Indium Tin Oxide ◽  
Reference Electrode ◽  
Charge Carrier Concentration ◽  
Junction Temperature ◽  
Energy Harvesting Devices

AbstractThermoelectric devices based on “n-type” oxide semiconductors and metal/oxide nanocomposites are being considered for high temperature thermocouples, heat flux sensors and energy harvesting devices. In terms of energy harvesting, preliminary 2D thermoelectric calculations indicated that enough electrical energy can be generated from the large thermal gradients that exist within a gas turbine engine to power active wireless devices. Several promising bi-ceramic junctions based on this concept were investigated in terms of their high temperature thermoelectric properties. The most promising bi-ceramic junction was based on indium tin oxide (ITO) and a NiCrCoAlY/alumina nanocomposite. The thermoelectric responses of these individual elements were evaluated relative to a platinum reference electrode. A maximum emf of 77 mV was achieved for a NiCrCoAlY/alumina nanocomposite/platinum thermocouple for an imposed temperature gradient of 1111 °C. The thermoelectric power for this couple was 78 μV/°C. When this NiCrCoAlY/alumina nanocomposite was combined with ITO to form a bi-ceramic junction, thermoelectric powers on the order of 700 μV/°C were obtained. A maximum electromotive force of 291mV was achieved for a hot junction temperature of 1100 °C. The thermoelectric response after repeated thermal cycling to 1200 °C was both repeatable and reproducible. The ITO was prepared in varying nitrogen, oxygen and argon partial pressures, which was used to control the charge carrier concentration, stability and thermoelectric response of the bi-ceramic junctions. The thermoelectric response decreased with increasing nitrogen partial pressure and increased with oxygen partial pressure in the plasma with the argon partial pressure constant. The relationship between the sputtering parameters and thermoelectric properties was investigated and the application of these bi-ceramic junctions as thermocouples and energy harvesting devices is discussed.

scholarly journals Formation and Characterization of Various ZnO/SiO2-Stacked Layers for Flexible Micro-Energy Harvesting Devices

2018 ◽  
Vol 8 (7) ◽  
pp. 1127 ◽  
Author(s):  
Chongsei Yoon ◽  
Buil Jeon ◽  
Giwan Yoon
Keyword(s):  
Thin Films ◽  
Energy Harvesting ◽  
Indium Tin Oxide ◽  
Control Sample ◽  
Single Layer ◽  
Rf Magnetron Sputtering ◽  
Device Performance ◽  
Polyethylene Naphthalate ◽  
Flexible Devices ◽  
Energy Harvesting Devices

In this paper, we present a study of various ZnO/SiO2-stacked thin film structures for flexible micro-energy harvesting devices. Two groups of micro-energy harvesting devices, SiO2/ZnO/SiO2 micro-energy generators (SZS-MGs) and ZnO/SiO2/ZnO micro-energy generators (ZSZ-MGs), were fabricated by stacking both SiO2 and ZnO thin films, and the resulting devices were characterized. With a particular interest in the fabrication of flexible devices, all the ZnO and SiO2 thin films were deposited on indium tin oxide (ITO)-coated polyethylene naphthalate (PEN) substrates using a radio frequency (RF) magnetron sputtering technique. The effects of the thickness and/or position of the SiO2 films on the device performance were investigated by observing the variations of output voltage in comparison with that of a control sample. As a result, compared to the ZnO single-layer device, all the ZSZ-MGs showed much better output voltages, while all the SZS-MG showed only slightly better output voltages. Among the ZSZ-MGs, the highest output voltages were obtained from the ZSZ-MGs where the SiO2 thin films were deposited using a deposition power of 150 W. Overall, the device performance seems to depend significantly on the position as well as the thickness of the SiO2 thin films in the ZnO/SiO2-stacked multilayer structures, in addition to the processing conditions.

Assessment of MEMS Vibration Energy Harvesting for High Temperature Sensing Applications

2015 ◽  
Vol 2015 (HiTEN) ◽  
pp. 000261-000265
Author(s):  
S T Riches ◽  
K Doyle ◽  
N Tebbit ◽  
Y Jia ◽  
A Seshia
Keyword(s):  
High Temperature ◽  
Energy Harvesting ◽  
Temperature Sensing ◽  
Vibration Energy ◽  
Mems Devices ◽  
Vibration Energy Harvesting ◽  
High Temperature Electronics ◽  
Sensing Applications ◽  
Aero Engine ◽  
Energy Harvesting Devices

Distributed electronics for improving the accuracy of sensing in harsh high temperature environments, such as aero-engine and down-well is a growing field, where reduced power input requirements in cabling and batteries is viewed a key enabler for accelerating the adoption of high temperature electronics. Although batteries are available that can operate up to 200°C, they offer limited life at high temperatures and are bulky, increasing the costs of deployment and maintenance. Cabling also adds weight and takes up space in limited access applications. Energy harvesting in-situ offers the opportunity to make a step change in the design of high temperature electronics modules and in expanding their possible range of applications; for example, in sensor systems for combustor and turbine monitoring in aero-engines. This paper covers an assessment of MEMS vibration energy harvesting technology for high temperature sensing applications. MEMS devices based on the principle of parametric resonance, using AlN on Silicon have been designed and fabricated, along with sourcing of high temperature components for rectification, impedance matching and energy storage. The MEMS devices have been packaged into ceramic chip carriers and measured for energy output from a random vibration profile representative of an aerospace application. The measured output from the MEMS vibration energy harvester is capable of providing sufficient power to be of interest for autonomous sensing applications. This paper reports on the performance of the MEMS vibration energy harvesting devices and their associated circuitry at room temperature and at temperatures of up to 150°C. The challenges remaining to develop robust energy harvesting devices that could be applied in aero-engine, down-well and other high temperature applications are described. This work has been carried out under the Innovate UK supported project HI-VIBE, in a collaboration between GE Aviation Systems – Newmarket and the University of Cambridge.

Energy Storage Characteristics of Electrochemically Deposited Graphene Oxide on ITO and Cu Substrates

2019 ◽  
Vol 966 ◽  
pp. 428-432
Author(s):  
Fitrilawati ◽  
Vika Marcelina ◽  
Diyan Unmu Dzujah ◽  
Ayi Bahtiar ◽  
Yeni Wahyuni Hartati ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Storage ◽  
Metal Oxide ◽  
Indium Tin Oxide ◽  
Reference Electrode ◽  
Metal Substrate ◽  
Cyclic Voltammogram ◽  
Voltage Range ◽  
Oxide Substrate ◽  
Storage Characteristics

Graphene Oxide (GO) is two dimensional material that has been widely studied as an electrode material for supercapasitor. We prepared thin films of GO on metal oxide substrate of indium tin oxide (ITO) and metal substrate of Copper (Cu) using electrochemical deposition technique from 0.5 mg/ml GO dispersed in water. ITO-GO film was prepared using voltage range of -1.6 V to 0 V (ITO) and Cu-GO film was prepared using voltage range of 0 V to 1 V at scan rate of 50 mV/s. Both samples were characterized using Cyclic Voltammetry (CV) measurements in 1 M KCl electrolyte at varied scan speed with platinum (Pt) as counter electrode and Ag/AgCl as reference electrode. We compare energy storage characteristics of ITO-GO and Cu-GO using cyclic voltammogram data. It is found that GO deposited in metal substrate of Cu has higer energy density compare to that deposited in metal oxide substrate of ITO.

Compact electrochemical bifunctional NOx/O2 sensor with metal/metal oxide internal reference electrode for high temperature applications

2008 ◽  
Vol 131 (2) ◽  
pp. 448-454 ◽  
Author(s):  
Jiun-Chan Yang ◽  
John V. Spirig ◽  
Dale Karweik ◽  
Jules L. Routbort ◽  
Dileep Singh ◽  
...  
Keyword(s):  
High Temperature ◽  
Metal Oxide ◽  
Reference Electrode ◽  
Internal Reference ◽  
Metal Metal ◽  
Temperature Applications

scholarly journals The Effects of Ba0.85Ca0.15Zr0.1Ti0.9O3 Addition on the Phase, Microstructure, and Thermoelectric Properties of Ca3Co4O9 Ceramics

2021 ◽  
Author(s):  
Panupong JAIBAN ◽  
Pimpilai WANNASUT ◽  
Anucha WATCHARAPASORN
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
High Temperature ◽  
Thermoelectric Properties ◽  
Figure Of Merit ◽  
Charge Carrier Concentration ◽  
Thermoelectric Device ◽  
Thermoelectric Power Factor ◽  
Seebeck Coefficients ◽  
Solid State Sintering

Abstract In this work, the influences of Ba0.85Ca0.15Zr0.1Ti0.9O3 (BCZT) addition on phase, microstructure, and thermoelectric properties of Ca3Co4O9 (CCO) were investigated. (1-x)CCO-(x)BCZT ceramics where x = 0, 0.003, 0.005, and 0.010 were fabricated successfully via a conventional solid-state sintering at 1,223 K for 24 hrs. The substitution of BCZT introduced the chemical defects (V''Co, V'''Co, V''Ca) in CCO ceramic, which increased charge carrier concentration and enhanced the electrical conductivity. The presence of Co3+ improved the Seebeck coefficients of CCO ceramic. The thermal conductivity of CCO ceramic decreased when BCZT was added. The addition of BCZT at x = 0.010 promoted the highest thermoelectric power factor (PF~235 mW/mK2), and the highest figure of merit (ZT~0.5) at 800 K, which present this ceramic an alternative p-type oxide thermoelectric for a high-temperature thermoelectric device.

Ocean Wave Energy Harvesting Devices

2008 ◽  
Author(s):  
Jeffrey T. Cheung ◽  
Earl F. Childress III
Keyword(s):  
Energy Harvesting ◽  
Wave Energy ◽  
Ocean Wave ◽  
Ocean Wave Energy ◽  
Energy Harvesting Devices

Vibrational Energy Harvesting Devices

2010 ◽  
Vol 2 (2) ◽  
pp. 80-92
Author(s):  
Rupesh Patel ◽  
Atanas A. Popov ◽  
Stewart McWilliam
Keyword(s):  
Energy Harvesting ◽  
Vibrational Energy ◽  
Energy Harvesting Devices ◽  
Vibrational Energy Harvesting

scholarly journals Piezoelectric property comparison of two-dimensional ZnO nanostructures for energy harvesting devices

RSC Advances ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 3363-3370
Author(s):  
Ang Yang ◽  
Yu Qiu ◽  
Dechao Yang ◽  
Kehong Lin ◽  
Shiying Guo
Keyword(s):  
Energy Harvesting ◽  
Piezoelectric Property ◽  
Piezoelectric Effect ◽  
Theoretical Studies ◽  
Two Dimensional ◽  
Zno Nanostructures ◽  
Energy Harvesting Devices ◽  
Experimental And Theoretical Studies

In this paper, experimental and theoretical studies of the piezoelectric effect of two-dimensional ZnO nanostructures, including straight nanosheets (SNSs) and curved nanosheets (CNSs) are conducted.

scholarly journals Enhanced Power Extraction with Sediment Microbial Fuel Cells by Anode Alternation

Fuels ◽  
2021 ◽  
Vol 2 (2) ◽  
pp. 168-178
Author(s):  
Marzia Quaglio ◽  
Daniyal Ahmed ◽  
Giulia Massaglia ◽  
Adriano Sacco ◽  
Valentina Margaria ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Energy Harvesting ◽  
Power Density ◽  
Microbial Fuel Cells ◽  
Average Power ◽  
Power Extraction ◽  
Harvesting Technique ◽  
Harvesting Method ◽  
Energy Harvesting Devices ◽  
Efficient Power

Sediment microbial fuel cells (SMFCs) are energy harvesting devices where the anode is buried inside marine sediment, while the cathode stays in an aerobic environment on the surface of the water. To apply this SCMFC as a power source, it is crucial to have an efficient power management system, leading to development of an effective energy harvesting technique suitable for such biological devices. In this work, we demonstrate an effective method to improve power extraction with SMFCs based on anodes alternation. We have altered the setup of a traditional SMFC to include two anodes working with the same cathode. This setup is compared with a traditional setup (control) and a setup that undergoes intermittent energy harvesting, establishing the improvement of energy collection using the anodes alternation technique. Control SMFC produced an average power density of 6.3 mW/m2 and SMFC operating intermittently produced 8.1 mW/m2. On the other hand, SMFC operating using the anodes alternation technique produced an average power density of 23.5 mW/m2. These results indicate the utility of the proposed anodes alternation method over both the control and intermittent energy harvesting techniques. The Anode Alternation can also be viewed as an advancement of the intermittent energy harvesting method.

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