The new lithium-ion rechargeable battery cathode materials

The new lithium-ion rechargeable battery cathode materials

Sanyo Electric recently successful trial using a new generation of lithium-ion rechargeable laptop battery cathode materials for the candidate - LiFePO4 battery,dell laptop battery and in “the 45th Battery Symposium” published the contents of the security.

The characteristics of LiFePO is: LiCoO2 cathode materials with the existing compared to lower-cost materials and high temperature will not release oxygen, thus the high security. In addition to Sanyo Electric, the seminar on the five research institutions have published the relevant results of basic research has been in full swing. For example, the University of Tokyo Institute of Technology announced the fast charge characteristics of LiFePO4. However, most of these studies remain in the pilot phase electrode, the battery can be used for the actual evaluation of the electrode characteristics has not yet begun. Sanyo Electric and the trial of a diameter of 18mm, high 65mm cylindrical toshiba batteries, and battery on the security characteristics of the test. The use of a graphite anode.

Safety test in the detection of the trial cylindrical barbed nail cells and the circumstances Overcharge.Y9943 Battery, Spurs to nail after 30 seconds the temperature rose to about +110 ℃, but then did not continue to rise, but slowly falling down. Charge during the test, 6T473 Battery
Inspiron 630m Battery, Inspiron 640m Battery, Y9943 Battery,as a result of charging excessive electrolyte decomposition temperature up to +120 ℃, while playing an open valve immediately after the power was cut off. From the above results, obtained in the security issues and there is no significant conclusions. Battery characteristics to 0.25A for discharge, the discharge capacity of 1095mAh, the energy density per unit volume for 214Wh / l, the energy density of unit weight for 96.5Wh / kg.

Issues currently faced by the characteristics of low temperature low. +60 ℃ at 96mAh, +25 ℃, when a discharge capacity of 888mAh to 0 ℃ will dramatically reduce the 375mAh. At the meeting, someone asked directly: “LiFePO4 there so many problems, there will be attractive to you? Have hoped to put in actual use it?.” In this regard, speakers from a personal point of view, said: “In addition to previously noted that the problem of low electronic conductivity,Inspiron 640m Battery this time found a low-temperature characteristics of the problem of low, I personally feel that the future emergence of new issues.”

Canon to launch small-scale fuel cells for hydrogen supply device

Canon developed the use of MEMS technology to create the hydrogen supply device, and in November 29, 2004 ~ 30, held in Kyoto “PowerMEMS 2004″ were released on. Applications for digital cameras and other portable devices on the fuel cell.

The role of hydrogen gas supply device is to preserve high-pressure storage tank of hydrogen needed to release the amount of an atmospheric pressure dropped after the supply to the fuel cell. Its structure and the use of divers to breathe oxygen devices like the valve is very common (Canon). MEMS technology will be adopted to reduce the size 8mm × 8mm × 1mm.

The use of hydrogen gas supply device to the 300μm thick silicon films plus 3 stacked structure.Inspiron 630m Battery, With hydrogen pumps connected to the bottom with a single-chip switch, the resulting hydrogen gas to enter through the middle layer of the channel to form a single-chip into the top single-chip, single-chip from the top of the hole supply to the fuel cell. First single-chip top-level processing toshiba satellite m40 battery, toshiba satellite m45 battery, with the middle layer to the stacked-on-chip processing, 6T473 Battery
Inspiron 630m Battery, Inspiron 640m Battery, Y9943 Battery,the final class with the most single-chip stack processing.

The lower silicon chip switch installed into the diameter of hydrogen 250μm. Through the opening and closing the switch to adjust the hydrogen supply. Released when it is published only in the use of nitrogen can be the result of normal work, it was used to test the hydrogen has been the same result.

Micro-generator can replace cell phone batteries

Georgia Institute of Technology announced that with the Massachusetts Institute of Technology, working closely with scientists, they have successfully developed a micro-generators, only 10 mm in diameter, is the continuing use of mobile phone battery is more than 10 times. Scientists will be held in January next year, the International Conference on Micro Electro Mechanical System published the results of this gratifying.

Georgia Institute of Technology is one of 10 open construction, computer, 6T473 Battery engineering, management and other professional, a total of 16,000 students in the United States is to train African-American women scientists and the best scientists, a university, research university is 2003-2004 academic year a total of 342 million U.S. dollars of research funding.

Over the years, more and more compact electronic products, and its battery has a larger volume of plays. In order to solve this problem, the scientists have been dedicated to the development of micro-generators, and put forward a number of different principles of micro-generators. And the Georgia Institute of Technology scientists have developed such a generator to replace the phone battery, 6T473 Battery
Inspiron 630m Battery, Inspiron 640m Battery, Y9943 Battery,indicating that micro-generators to enter the electronic products to replace conventional batteries and an important step.

The principle of the micro-generator is installed in a chip on the induction coil, so that a small rotating magnet around the coil, resulting in sufficient current. Through continuous testing, the rotating speed of the magnet is now up to 100,000 per minute lap, the speed can generate 1.1 kilowatts of electricity, enough to replace the phone toshiba satellite m50 battery, toshiba satellite m55 battery. The researchers said that will be sure to have a speed of 20-50 kilowatts of power for laptop computers. In order to improve the rotation speed, the most critical problem is how to avoid rotating magnet in the process of fracture. Centrifugal force generated by high-speed rotating magnets broken enough to make, in order to solve this problem, researchers continue to improve the size of magnet and wrapped in titanium alloys in.