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Conducting Polymer Electrodes for Th...

Wijeratne, Kosala,

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Conducting Polymer Electrodes for Thermogalvanic Cells /

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Conducting Polymer Electrodes for Thermogalvanic Cells // Kosala Wijeratne.
作者:	Wijeratne, Kosala,
面頁冊數:	1 electronic resource (114 pages)
附註:	Source: Dissertations Abstracts International, Volume: 85-12, Section: B.
Contained By:	Dissertations Abstracts International85-12B.
標題:	Energy. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31248463
ISBN:	9798382274300

Conducting Polymer Electrodes for Thermogalvanic Cells /
Wijeratne, Kosala,

Conducting Polymer Electrodes for Thermogalvanic Cells /Kosala Wijeratne. - 1 electronic resource (114 pages)

Source: Dissertations Abstracts International, Volume: 85-12, Section: B.

Fossil fuels are still the dominant (ca. 80%) energy source in our society. A significant fraction is used to generate electricity with a heat engine possessing an efficiency of approximately 35%. Therefore, about 65% of fossil fuel energy is wasted in heat. Other primary heat sources include solar and geothermal energies that can heat up solid and fluids up to 150o C. The growing demand and severe environmental impact of energy systems provide an impetus for effective management and harvesting solutions dealing with waste heat. A promising way to use waste heat is to directly convert thermal energy into electrical energy by thermoelectric generators (TEGs). Solid state TEGs are electronic devices that generate electrical power due to the thermo-diffusion of electronic charge carriers in the semiconductor upon application of the thermal field. However, there is another type of thermoelectric device that has been much less investigated; this is the thermogalvanic cell (TGCs). The TGC is an electrochemical device that consists of the electrolyte solution including a reversible redox couple sandwiched between two electrodes. In our study, we focus on iron-based organometallic molecules in aqueous electrolyte. A temperature difference (∆\uD835\uDC47) between the electrodes promotes a difference in the electrode potentials [∆\uD835\uDC38\uD835\uDC38(\uD835\uDC47)]. Since the electrolyte contains a redox couple acting like electronic shuttle between the two electrodes, power can be generated when the two electrodes are submitted to a temperature difference. The focus of this thesis is (i) to investigate the possibility to use conducting polymer electrodes for thermogalvanic cells as an alternative to platinum and carbon-based electrodes, (ii) to investigate the role of viscosity of the electrolyte in order to consider polymer electrolytes, (iii) to understand the mechanisms limiting the electrical power output in TGCs; and (iv) to understand the fundamentals of the electron transfer taking place at the interface between the polymer electrode and the redox molecule in the electrolyte. These findings provide an essential toolbox for further improvement in conducting polymer thermoglavanic cells and various other emerging electrochemical technologies such as fuel cells, redox flow battery, dye-sensitized solar cells and industrial electrochemical synthesis.

English

ISBN: 9798382274300Subjects--Topical Terms:

876794
Energy.
Subjects--Index Terms:

Polymer thermoglavanic cells

Conducting Polymer Electrodes for Thermogalvanic Cells /
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245 1 0 $a Conducting Polymer Electrodes for Thermogalvanic Cells / $c Kosala Wijeratne.
264 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2018
300 $a 1 electronic resource (114 pages)
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500 $a Advisors: Crispin, Xavier.
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520 $a Fossil fuels are still the dominant (ca. 80%) energy source in our society. A significant fraction is used to generate electricity with a heat engine possessing an efficiency of approximately 35%. Therefore, about 65% of fossil fuel energy is wasted in heat. Other primary heat sources include solar and geothermal energies that can heat up solid and fluids up to 150o C. The growing demand and severe environmental impact of energy systems provide an impetus for effective management and harvesting solutions dealing with waste heat. A promising way to use waste heat is to directly convert thermal energy into electrical energy by thermoelectric generators (TEGs). Solid state TEGs are electronic devices that generate electrical power due to the thermo-diffusion of electronic charge carriers in the semiconductor upon application of the thermal field. However, there is another type of thermoelectric device that has been much less investigated; this is the thermogalvanic cell (TGCs). The TGC is an electrochemical device that consists of the electrolyte solution including a reversible redox couple sandwiched between two electrodes. In our study, we focus on iron-based organometallic molecules in aqueous electrolyte. A temperature difference (∆\uD835\uDC47) between the electrodes promotes a difference in the electrode potentials [∆\uD835\uDC38\uD835\uDC38(\uD835\uDC47)]. Since the electrolyte contains a redox couple acting like electronic shuttle between the two electrodes, power can be generated when the two electrodes are submitted to a temperature difference. The focus of this thesis is (i) to investigate the possibility to use conducting polymer electrodes for thermogalvanic cells as an alternative to platinum and carbon-based electrodes, (ii) to investigate the role of viscosity of the electrolyte in order to consider polymer electrolytes, (iii) to understand the mechanisms limiting the electrical power output in TGCs; and (iv) to understand the fundamentals of the electron transfer taking place at the interface between the polymer electrode and the redox molecule in the electrolyte. These findings provide an essential toolbox for further improvement in conducting polymer thermoglavanic cells and various other emerging electrochemical technologies such as fuel cells, redox flow battery, dye-sensitized solar cells and industrial electrochemical synthesis.
520 $a Fossila branslen ar fortfarande den dominanta (ca 80 %) energikallan i vart samhalle. En betydande del av den energin anvands for att producera elektricitet med varmemaskiner vilka ofta har en verkningsgrad pa omkring 35 %. Alltsa forloras ungefar 65 % av den fossila energin i spillvarme. Andra stora varmekallor ar sol- och geotermiska energier vilka kan varma upp material och vatskor upp till 150oC. Den okande efterfragan pa energi och den betydande paverkanenergisystem har pa miljon skapar en drivkraft att finna losningar dar energin i spillvarme kan tas tillvara. En lovande metod ar att direkt konvertera den termiska energin i spillvarmen till elektricitet med hjalp av termoelektriska generatorer (TEGs). TEGs genererar elektrisk energi fran den termodiffusion av laddningsbarare som uppstar i en halvledare som utsatts for en temperaturskillnad. Det finns dock en typ av termoelektriska generatorer som inte ar speciellt utforskade, namligen termogalvaniska celler (TGCs). TGCs har elektrokemisk funktion och bestar av en elektrolyt, innehallande ett reversibelt redox-par, placerad emellan tva elektroder. I var studie har vi fokuserat pa jarnbaserade organisk-metalliska redox-par i vattenbaserad elektrolyt. En temperaturskillnad (∆\uD835\uDC47) mellan elektroderna ger en skillnad i elektrisk potential [∆\uD835\uDC38\uD835\uDC38(\uD835\uDC47)]. Eftersom elektrolyten innehaller ett redox-par som fungerar som en elektronisk forbindelse mellan de tva elektroderna, kan elektricitet utvinnas da elektroderna utsatts for en temperaturskillnad. Fokus for denna avhandling ar (i) att undersoka mojligheten att anvanda ledande polymerer som elektrodmaterial i termogalvaniska celler som ett alternativ till platina- och kolbaserade elektroder, (ii) att undersoka betydelsen av elektrolytens viskositet i syfte att utvardera polymerbaserade elektrolyter, (iii) att forsta mekanismerna som begransar uteffekten i TGCs; och (iv) att pa djupet forsta den elektronoverforingen som sker mellan polymerelektroden och redox-paret i elektrolyten. Dessa resultat utgor grundlaggande verktyg for vidare forbattring av termogalvaniska celler baserade pa ledande polymerer och aven en mangd andra lovande elektrokemiska tekniker sa som bransleceller, flodesbatterier; Gratzelsolceller och industriell elektrokemisk syntes.
546 $a English
590 $a School code: 0720
650 4 $a Energy. $3 876794
650 4 $a Polymer chemistry. $3 3173488
653 $a Polymer thermoglavanic cells
653 $a Fossil fuels
653 $a Thermoelectric generators
690 $a 0495
690 $a 0791
710 2 $a Linkopings Universitet (Sweden). $e degree granting institution. $3 3819068
720 1 $a Crispin, Xavier $e degree supervisor.
773 0 $t Dissertations Abstracts International $g 85-12B.
790 $a 0720
791 $a Ph.D.
792 $a 2018
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31248463