A new type of solid-state battery that can store twice as much as a conventional battery will soon be used in wearable devices, smart phones, and even electric cars.

Applied Materials, the world's largest semiconductor equipment and service provider, says they can make solid-state batteries cheaper. Lightweight and wearable devices that are in desperate need of improved endurance will benefit. Solid-state batteries have been used in some wireless sensor devices for a long time, and the price is high, which is not conducive to promotion.

Solid electrolytes are used in solid-state batteries, while traditional lithium-ion batteries use liquid electrolytes, and solid electrolytes can accommodate more lithium electrodes. These lithium electrodes have a greater storage capacity. The liquid electrolyte is flammable, so the solid-state battery improves the safety of the battery to some extent. Solid-state batteries eliminate the need for complex cooling systems for electric vehicles, reducing costs while also reducing the size.

The manufacture of large-area high-quality electrodes and electrolyte materials is one of the challenges for the commercialization of solid-state batteries. In the process, the conductor layer, the electrode layer, and the electrolyte layer need to be precisely arranged in the battery—any gap will lead to a short circuit. Applied Materials stated that they are confident to overcome this problem and other production challenges.

Andy Chu, director of energy storage product marketing at the company, said: “The obstacles that have hindered the development of solid-state batteries are material processing and costs. We are working to solve this problem. Once these problems are solved, the output will be greatly improved.”

Applied Materials said that users already use their equipment to make batteries, but the list of these users is not yet disclosed. But they added that the first to commercialize new solid-state batteries is likely to be a wearable device, such as a smart watch with a strict size requirement.

Unlike traditional batteries, which also have to worry about liquid electrolytes, solid-state batteries are relatively free in shape. This allows the solid-state battery to be shaped to fit a smart watch, even built into a flexible strap.

Applied Materials currently does not disclose the cost, actual storage, and actual charging time of such solid-state batteries. The unavoidable problem is that solid-state batteries use solid electrolytes that are not as conductive as liquid electrolytes, which limits the output of electricity to some extent. Applied Materials said that the solution to this problem is to add conductive impurities to the solid electrolyte, just like adding semiconductors to the chip. The company is also working on how to speed up the introduction of efficient storage materials into the battery, which will further increase storage capacity.

The problem of battery life is the issue that we are most concerned about when purchasing mobile products. With the development of technology, there are more and more solutions and we hope to be promoted as soon as possible.

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