United States found that nano-tube energy density than lithium-ion battery
Currently, scientists are still trying to regularly vacuum tube (vacuumtubes) for micro-transformation, but not many success stories, mainly because of the kinds of glass packaging in most applications the valve has been replaced by transistors.
The University of Illinois at Urbana-Champaign (UniversityofIllinoisatUrbana-Champaign) researchers think that the vacuum can be used to as a high energy density batteries based or non-volatile memory; said that, in theory, nano-sized vacuum energy density should be an array up to three times the lithium-ion battery.
Researchers at the University of Illinois AlfredHubler and OnyeamaOsuagwu, published an article entitled: "Digital Quantum Battery: The energy density stored in the nano-tube array," the paper, but research is still theoretical, yet practical verification.
The paper is based on the establishment of field emission devices (field-emissiondevices) have clearly allows the study of current through the structure; authors claim that the field emission device nano-level through appropriate design, can electric breakdown (electricbreakdown) to quantum phenomenon of compression; gap distance of 10 nm, under its capacity is very large.
The nano-tube array structure, the critical spacing is slightly larger than the 10 nm distance to the cathode, anode, cathode rules to vertical alignment, with the current cutting-edge lithography nodes quite. Authors pointed out that the vacuum energy density is affected by vacuum breakdown (vacuumbreakdown) is limited, but in the case of atmospheric pressure is lower than 106torr, the breakdown field does not rely on residual gas (residualgas), but with the electrode surface characteristics.
Thesis that the nano-tube energy / power density than lithium-ion batteries and will electrochemical capacitors (electrochemicalcapacitors), the estimated weight per kg energy density up to 1-Mjoule, volume energy density is up to every cubic 3-Gjoules. And this number of quantum battery (although the number of one billion needed to form an array of vacuum tubes), there are many other advantages.
First, the tube can be by conventional lithography and wafer for metal materials to produce silicon substrate, silicon oxide can be used to do for the tube wall insulation; its anode material is recommended for carbon nanotubes , cathode material you can use tungsten (tungsten). In addition, the battery can easily be integrated into the IC substrate, the chip can be used as rechargeable batteries.
The tube array, there are other advantages, including its charge and discharge rate will exceed all other components; authors also pointed out that the nano-tube can be maintained for several years without loss of electrical energy, and therefore may be used as non-volatile memory components.
China BAK Battery Commercial Battery denied receiving orders for Google phone
It is reported that Chinese battery manufacturers BAK (NASDAQ: CBAK) Chief Financial Officer Tony Shen said the company received orders for Google's new mobile phone battery report is not accurate.
The CFO in an interview with Bloomberg News, said, "I sell all products with the company and the CEO and COO in charge of communication, we do not know such thing."
BAK shares rose 63.2% yesterday, up $ 1.41 to $ 2.23 per share. In morning trading the stock fell 91 cents, down 25% to $ 2.73 per share.
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