Sony announced on August 23, 2007, that it has developed a biological battery that generates electricity by breaking down glucose (sugar). The "bio battery" converts glucose into power utilizing enzymes as a catalyst, through the application of power generation principles found in living organisms. The prototype cubic cell (measuring 39 mm along each edge), which holds 40 cc of glucose solution, is able to achieve a power output of 50 mW, which is the highest reported level for this type of bio battery.

The anode extracts electrons and hydrogen ions from the glucose solution through enzymatic oxidation. The hydrogen ions migrate to the cathode, where they react with electrons and oxygen from the air to produce water. Through this electrochemical reaction, electrons flow through the cathode and anode to produce power.

The battery works by supplying sugar solution to the cathode. Sony has shown that four cubic cells connected in series can successfully activate a memory-type Walkman music player.

As glucose (sugar) is an abundant resource around the world, the company is utilizing it in an attempt to realize an environmentally friendly battery. The press release includes a video showing a Walkman music player with speakers powered by both glucose and a sugar-based isotonic drink in the battery.

http://www.sony.net/SonyInfo/News/Press/200708/07-074E/

Posted: 2007/12/20 08:10:08 PM
Japanese version

TAG Eco-product/Business , Energy , Manufacturing industry