Cell phone battery will take two steps from the body s charge treasure

　　A new device might be able to let you gets energy from natural motion, and use it to charge your smart phone. The system, developed by researchers at the Massachusetts Institute of machinery can produce, and need only a little bent could produce electricity output. The size and inherent flexibility in the future might have application in the wearable smart devices and other electronic products. Vans waffle

　　According to the MIT Press reported, the researchers said, this system can be an inexpensive means of mass production. The flexible device using electrochemical techniques, with similar work with batteries or fuel cells.

　　Researchers soaked porous polymer liquid electrolyte is sandwiched between lithium alloys as electrode material. When the alloy is pressure and appears bent when lithium-ion will be through the polymer and can be used to power the voltage and current.

　　If the weight on the side of the unit, then it will appear along with the people's daily activities such as walking bent. So far, the first generation model of efficiency as high as 15%. But researchers said that convert mechanical energy to electrical energy will be when the device is in top working condition.

　　Massachusetts Institute of technology Professor Ju Li in an interview said, the device does not heat the second law of thermodynamics limits, so that, in principle, its efficiency can be reached 100%. Ju Li, Professor and his graduate students developed the bending charge system.

　　Early devices to use the body's motion piezoelectric friction effects in the use of small scale and there is no effect. Professor Ju Li said: "in the traditional model, when they face the pulse input will give response time in microseconds, but this does not conform with the majority of the time. In addition, these devices have a higher resistance and flexural rigidity, the price is quite expensive. "

　　Study came to the conclusion that after the team through a series of tests, the system is stable. After 1500 cycles, researchers observed in the system and no performance degradation phenomena.

　　From Wu Wenzho, an Assistant Professor of industrial engineering at Purdue University and was not involved in the study, said: "this is very interesting, and very important, it provides a new type of electrochemical methods to convert mechanical energy into electrical energy, during the design and structure are very simple. " Vans cases

　　More importantly, the output current of the system is very large, and has a longer pulse duration. In practical applications, it is very important, because most will convert mechanical energy to electrical energy electricity output is small, duration of the pulses are not long enough.

　　In addition to smart devices, this system may also be used in biomedicine, or be integrated into roads, bridges and the keyboard in system pressure sensor.

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