Ultra-high-speed charge and discharge lithium -Lithium - Ion Battery Equipment

Toshiba ultra-high-speed charge and discharge lithium battery -Lithium - Ion Battery Equipment

At the "2018 Yokohama People and Vehicles Technology Exhibition" that ended not long ago, Toshiba Materials exhibited a lithium-ion battery that uses purple tungsten oxide as the negative electrode material, which can realize ultra-fast charging. The applications of this kind of battery range from automobiles, micro/mild hybrid electric trains, elevators, uninterruptible power supply UPS to high current power supplies, with obvious application advantages and wide coverage. As a pioneer in the field of lithium-ion battery technology, it is very likely that new battery materials will officially enter commercial use, which may further expand the demand market for tungsten oxide.(Lithium - Ion Battery Equipment)

It is understood that tungsten oxide powder developed by Toshiba Materials is used as an electrode material for new battery devices, because tungsten oxide helps electron conductivity and lithium ion diffusion to achieve ultra-fast charge and discharge. This material could enable the construction of high-power-density battery devices, enabling smaller, lighter devices.

More specific details are that what Toshiba has developed is a powder material called WO2.72, which is also called purple tungsten oxide by our industry. Purple tungsten oxide is a kind of tungsten oxide. Its appearance is purple finely divided crystal powder. It is a tungsten oxide product developed in my country in recent years. Its phase composition is W18O49. Because it has the largest mesopore volume and the smallest micropore Volume, the narrowest pore size distribution, the smallest fractal dimension, the largest average pore size and specific surface area, are the preferred materials for the preparation of ultra-fine tungsten powder or nano-tungsten powder, photocatalytic materials, petroleum catalysts, and microelectronic integrated circuit boards.

The preparation process of purple tungsten oxide mainly includes APT wet hydrogen direct reduction method, hydrogen tungstate reduction method, and APT ammonia mild reduction method. But Toshiba did not introduce their purple tungsten oxide production process. According to the official website of Toshiba Materials, purple tungsten oxide has very high chemical activity, which can enhance electronic conductivity. Due to the low internal resistance of the material and its excellent Li ion diffusivity, the use of purple tungsten oxide as the negative electrode of the battery can realize high current charge and discharge. In particular, it is excellent in discharge characteristics in a low temperature environment, and has rate characteristics equal to or higher than the discharge characteristics of double-layer capacitors (EDLC) even at -40°C. Previously, the rate characteristics of Li-ion secondary batteries and Li-ion capacitors at low temperatures have been an unsolved problem.

The characteristics of the battery are that both power density and energy density can be increased to 2 to 3 times that of double-layer capacitors. Energy density has also been improved 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 power and difficult development. The development of this battery will make it possible to use batteries in high-output applications.

As a technology leader in the field of lithium-ion batteries, Toshiba Corporation, after showing its newly developed sample batteries at the exhibition, hopes to supply the new results as battery materials to other battery manufacturers, with huge commercial potential. If popularized, tungsten materials will no longer be just a bystander in the field of lithium-ion battery manufacturing.



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