Carbon nanotube battery
New York State sony vgp-bpl9 battery Technological University - Rensselaer Polytechnic Institute (RPI) announced the development of cellulose and carbon nanotubes by the electric double layer capacitors, as well as the composition of Li-ion battery (in English published data). The thickness of these components is only tens of μm, the thickness of a human hair can be like a paper-bending. RPI researchers that “the future can take advantage of Roll to Roll printing technology manufactured batteries.” Technical details will be August 21, 2007 published in the academic journal “Proceedings of the National Academy of Sciences” published.
RPI development of the following results: (1) developed to enable multi-layer carbon nanotubes (MWNT: multi-walled nanotubes) in order to form a brush shape as the main components of cellulose, cellulose membrane; (2) the use of two cellulose membranes made electric double layer capacitors; (3) using a cellulose membrane and the lithium electrode made of lithium batteries.
Cellulose membrane as porous membranes sony vgp-bps10 battery, use of the former need to penetrate up to 25% of the weight ratio of ionic liquids, etc. (RTIL: room-temperature ionic liquid) - [Bmin] [Cl] (1-butyl ,3-methylimidazolium chloride). RPI will be two of the film laminate, so that MWNT brush outwards, and then in the lateral formation of titanium (Ti / Au) film as an electrode, made of electric double layer capacitors. On the other hand, lithium batteries is to give a thin film laminate with the lithium electrode in the middle clip into lithium hexafluorophosphate (LiPF6) ionic liquid electrolyte instead of the outside foil electrodes attached. Two kinds of components, manufacturing methods were not open.
Electric double layer capacitor used in [Bmin] [Cl] ionic liquid has not volatile and so can be in a larger temperature range stability. Such ionic liquids through cellulose membrane pore diameter of 50 ± 5nm contact with the charge.
In the frozen bank and in vivo work can
The performance of electric double layer capacitor is as follows: electrostatic capacity of 22F / g, maximum operating voltage of 2.3V, the energy density of about 13Wh/kg, capacity of the existing electric double layer capacitor level. The weight per unit area of only 15mg/cm2, very light, and because [Bmin] [Cl] does not contain moisture, so the device operating temperature range is very large, reaching -77 ~ +150 ℃. The device, when the temperature dropped to -196 ℃ Although it is impossible sony vgp-bps10/b battery as a capacitor, but the temperature rise after full recovery. RPI is now confirmed that the components in repeated charge and discharge over 100 times, they could still maintain good features.
RPI said that apart from ionic liquids, the use of the component potassium hydroxide (KOH) aqueous solution and human blood, sweat, urine and other body fluids as the electrolyte to achieve the same performance of the work. Therefore, the body is also expected to work as a pacemaker and other equipment with batteries.
Capacitor and rechargeable batteries for hybrid components are also expected to realize
Lithium battery charging voltage up to 3.6V, in order to 10mA / g for a fixed output power of discharge. Battery capacity in the first charging up to 430mAh / g, but the 2nd charge will be reduced to 110mAh / g below.
In the future, RPI plans to build integrated electric double layer capacitors and lithium sony vgp-bps10/s battery for hybrid components. The component is estimated to be, “which can play both characteristics of the capacitor and rechargeable batteries fully mixed” (RPI).
Nokia mobile phone batteries could overheat hidden object is Panasonic Battery manufactured 46 million
Finland’s Nokia (Nokia) announced that its mobile phone configuration lithium batteries “BL-5C” there is overheating risks, for which Nokia will replace the 46 million worldwide BL-5C battery (in English published data).
Replace the object is Panasonic Battery industry in December 2005 ~ November 2006 during the manufacture of BL-5C. Nokia is also entrusted to other battery manufacturers BL-5C, shipments reached 300 million or more, which need to be replaced for the 46 million.
Nokia says, BL-5C in the process of charging the phenomenon of occasional abnormal heat. At present, the report on the phenomenon of abnormal heat of about 100 cases, there is no serious incidents have been reported.
Nokia BL-5C is one of 14 types of mobile phone sony vgp-bps10a battery equipped with the “N70″, “N91″ mobile phone such as the balance 50. Nokia has already introduced the need for the user identification method replacement battery (BL-5C relevant information).
