Recently, U.S. scientists have developed a new method create a piece of button battery, which provided by the butane fuel, run time is the same weight of lithium-ion battery 4 times, when the power runs out, simply by adding a small amount of new fuel, will be able to immediately to the battery. They also create another one by a radioactive decay provide heat to the battery, it can continue to generate electricity for 30 years, do not add fuel does not need maintenance, implementation time is expected to become the ideal space flight mission equipment power.
Massachusetts Institute of Military Institute of Nanotechnology engineers Horowitz said that tungsten is the main raw material for the new battery in the etching of the tungsten surface billions of nano-sized pits. When the tungsten absorbs heat, regardless of the heat from the sun, hydrocarbon fuels, is the decay of radioactive isotopes or other sources of heat, light will be issued, and emission spectra are constantly changing, as each pit as a resonator, can release specific wavelengths.
U.S. Department of Energy Information Management Center data show that the energy used today, 92 percent of energy needs through the heat into mechanical energy into the process longer. However, the efficiency of existing mechanical system is relatively low, and can not be applied to reduce the size of the sensor, smart phones or medical monitoring equipment.
