Tianjin Institute of technology has made new progr

Tianjin Institute of technology and biology has made new progress in the research of enzyme fuel cell

enzyme fuel cell is a new type of fuel cell. Through the catalysis of biological enzymes on the electrode, the chemical energy in the substrate (such as sugars) is directly but easily converted into electrical energy. Enzyme fuel cell has the advantages of mild reaction conditions, safety, environmental protection, easy access to substrates and low price. It is considered to be one of the next generation of green cells that can power mobile electronic products, and has broad commercial prospects. Glucose is the most commonly used substrate in enzyme fuel cells, which has a very high energy storage density. However, previous studies have used only a single enzyme or a multi enzyme system with general efficiency, which can not fully oxidize and utilize the glucose substrate, resulting in a large amount of chemical energy difficult to be released and low energy conversion efficiency of the battery

the capacity and time of the energy storage system of Tianjin Industrial vanadium battery of the Chinese Academy of Sciences can range from 2 hours to 12 hours or even 24 hours. After more than a year of efforts, the in vitro synthetic biology team of the Institute of biotechnology has developed a set of in vitro multi enzyme molecular machine system that does not rely on ATP and COA. The system is composed of 12 enzymes, which can completely oxidize glucose, and each glucose molecule releases 24 electrons, (1) speed reduction and energy conversion efficiency of nearly 100% of output torque are achieved. This study proved quantitatively for the first time that glucose can be completely oxidized in enzyme fuel cells, maximizing the energy density of sugar cells. In addition, by replacing and adding new enzyme devices. 4. Regular inspection, and through the transformation of in vitro pathway engineering, the output current of the enzyme fuel cell at room temperature was increased from 2.8 to 6.9 ma/cm2. This study indicates that the use of in vitro pathway engineering and multi enzyme molecular machines to convert sugar energy into electrical energy has great potential and application prospects

this study has received strong support from Tianjin Institute of engineering, Chinese Academy of Sciences, cell free bioinformatics and Virginia Tech University. The relevant results were published in metabolic engineering