State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China.
State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China.
Carbohydr Polym. 2022 Oct 15;294:119789. doi: 10.1016/j.carbpol.2022.119789. Epub 2022 Jun 28.
Reasonable and efficient utilization of low-grade thermal energy in nature is the choice for sustainable energy development. We demonstrate a bacterial cellulose (BC) hydrogel thermocell (TEC) based on BC electrolyte combined with carbon fiber paper and copper composite electrode sheets. The large specific surface area of carbon fiber paper provides a large number of active sites for thermoelectric ions, which drives the redox reaction inside the electrolyte and stimulates the chemical reaction between the electrolyte and the electrode. The combination of the two chemical reactions significantly improves the thermoelectric performance of the thermocell. The thermopower of the BC-TEC reaches 5.9 mV·K at a temperature difference of 50 K. The TEC consisting of 6-units in series produces an open-circuit voltage of about 2 V and a peak power of 535 μW. The TEC shows new potential and prospects in ambient thermoelectric energy conversion by rationally designing the power generation principle.
合理高效利用自然中低品位热能是可持续能源发展的选择。我们展示了一种基于细菌纤维素（BC）电解质的 BC 水凝胶温差电池（TEC），该电解质结合了碳纤维纸和铜复合电极片。碳纤维纸的大比表面积为热电离子提供了大量的活性位点，这推动了电解质内部的氧化还原反应，并刺激了电解质与电极之间的化学反应。这两个化学反应的结合显著提高了温差电池的热电性能。在 50 K 的温差下，BC-TEC 的热电势达到 5.9 mV·K。由 6 个单元串联组成的 TEC 产生约 2 V 的开路电压和 535 μW 的峰值功率。通过合理设计发电原理，TEC 在环境温差能量转换方面显示出了新的潜力和前景。
