Purple tungsten oxide (WO2.72) is not tungsten trioxide (WO3) in the traditional sense, but a purple finely divided crystalline powder containing oxygen O2.72, which can be used as a negative electrode material to help lithium-ion batteries achieve ultra-fast charging, so it can be constructed High power density battery devices, resulting in smaller and lighter devices.
Violet tungsten oxide is very chemically reactive and enhances electron conductivity. Due to the low internal resistance of the material, it also has excellent Li ion diffusivity. In particular, the discharge characteristics are excellent in a low-temperature environment, and even at -40°C, they still have rate characteristics equal to or higher than the discharge characteristics of double-layer capacitors (EDLC). Previously, the rate characteristics of Li-ion secondary batteries and Li-ion capacitors at low temperatures have been unresolved issues.
The characteristic of the battery using the new material is that the power density and energy density can be increased to 2 to 3 times that of double-layer capacitors. Energy density has also been boosted compared to Li-ion capacitors designed to increase the energy density of EDLCs. In the field of capacitors, Li-ion secondary batteries are not suitable for high-output applications due to insufficient output and difficult development. The development of this battery will make it possible to use batteries in high-output applications.
It is said that new battery materials are very likely to be commercially available, which may further expand the demand market for tungsten oxide. The application advantages of lithium batteries using new materials are quite obvious, covering a wide range from automobiles, micro/mild hybrid trains, elevators, uninterruptible power supply UPS to high-current power supplies.
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