Discovery makes charging electronics into clothing through body heat as possible




A team of Chinese researchers have devised a way to generate energy through, with the help of gel-like electrolytes, taking advantage of the difference in temperature between the surface of the body and the outside temperature.

Gel-based thermocel With the resultant energy of the converted body heat into electricity can be provided, for example, portable electronics of energy. The Chinese used for this purpose two types of thermo-galvanic gelelektrolyten, a positive and a negative, which were placed between two flexible substrates. For example, an on-based gel could thermocel made ​​to be.

The use of gelelektrolyten makes the Chinese technique for wearables more interesting than previous residual heat generators, which act as electrolyte with liquid electrolytes or salts. The system operates by means of the thermogalvanisch effect , in which two electrodes are arranged in a conductive fluid or electrolyte. Often, there is an electrolyte from a liquid, but that is not useful in connection with leakage. Therefore, the Chinese used a gel.

The gels were placed in separate cells, wherein the cell with Fe 2+ and Fe 3+ has a negative potential to the cold side of the cell and cell type with two Fe (CN) 6 3- and 4- FeCN 6 on the cold side a positive charge.

The cells are then arranged in a checkerboard pattern and alternately connected to the top and bottom metal plates, so that the cells are in series. As a prototype, the researchers developed a glove which could be obtained in an environment of 5 ° C, 0.7V at 0,3μW, which is very little. The expected return on this type of system is also quite small, but depending on the type of application may not be very relevant. The first goal of the researchers is, in any case, to get more energy out of smaller temperature differences. On average, the skin temperature of about 32 ° C.

The article in Angewandte Chemie can be found at Wiley.

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