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Energy T echnology:PEDOT/PSS Application of thin film electrode in thermoelectric chemical battery

wallpapers News 2020-12-20

produces a lot of heat energy in daily life. Under the theme of energy saving environmental protection waste heat recovery technology is an effective way to improve energy utilization prevent resource waste. In recent years the research on waste heat recovery has attracted the attention of academic industrial circles especially the utilization technology of heat energy (such as body temperature) at low temperature which has attracted more more attention in the development of health care products wearable devices self powered sensor networks. However due to the low energy density low energy conversion efficiency of dispersed heat energy at low temperature its utilization is difficult challenging. Thermoelectric chemical cell is a kind of technology based on electrochemical method which can directly convert heat energy into electric energy. It consists of two electrodes electrolyte solution containing redox pair. When the temperature difference is applied at both ends of the cell the redox reaction takes place on the electrode surface the potential difference is formed. The generated potential can supply the external load between the two electrodes. Platinum with high catalytic activity low charge transfer resistance is recognized as an ideal electrode. However the high cost limits its application in thermoelectric chemical cells.

Wei qingshuo's team of Japan Institute of Industrial Technology (AIST) has been committed to developing promising electrode materials to replace platinum in recent years. It is found that poly (34-ethylenedioxythiophene) / poly (styrene sulfonate) (PEDOT / PSS) film materials exhibit lower charge transfer resistance than platinum. The conductivity of the self-supporting film reaches 1000 s / cm. Using ferrocyanide / Ferrocyanide as electrolyte the output power of the thermoelectric chemical battery based on PEDOT / PSS can reach more than 300 MW which can drive LED Bluetooth humidity / temperature sensor. In addition another advantage of PEDOT / PSS is that it can be doped with insoluble redox pairs (such as Prussian blue derivatives) which is helpful to study the temperature dependent redox potential of different electrode materials. When the temperature difference between the electrodes is maintained the electrochemical regeneration can be realized without changing the temperature of the environment. Therefore PEDOT / PSS film material has a great application prospect


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