Nickel Hydride No. 5

Research and development of new Nickel Hydride No. 5

Recently, American researchers reported in the journal "American Chemical Society Energy Letters" that they have developed a new type of flow battery that can store electrical energy through organic molecules dissolved in neutral pH water. This achievement makes it possible to produce non-toxic, non-corrosive batteries with ultra-long service life, and is expected to significantly reduce production costs. The storage system of a flow battery generally includes two liquid storage tanks, the positive and negative electrodes, which contain two different electrolytes. The connecting part between them is the power generation area, which is separated by a diaphragm. The two electrolytes produce ion exchange across the membrane to achieve the storage and release of electrical energy. The larger the storage tank, the more electrical energy can be stored. Nickel Hydride No. 5 can provide a solution for the storage of renewable energy sources such as wind power and solar power, which have discontinuous power generation and unstable output, but the storage capacity of existing Nickel Hydride No. 5 will decrease after multiple charge and discharge cycles, and regular maintenance of the electrolyte is required. By adjusting the molecular structure of the positive and negative electrolytes to make them soluble in water, Harvard researchers have developed a battery that loses only 1% of its storage capacity every 1,000 cycles of charging and discharging, while lithium-ion batteries generally become unusable after 1,000 cycles. Neutral pH can also significantly reduce the manufacturing cost of the diaphragm that separates the positive and negative poles of the battery. Because most current flow battery diaphragms use expensive polymers to withstand corrosive substances in the battery, their cost accounts for one-third of the cost of the entire battery device. The diaphragm in this new flow battery is actually just salt water on both sides, so its material can be made of cheap hydrocarbons, which greatly reduces costs. Because the electrolyte can be dissolved in water with a neutral pH value and is non-toxic and non-corrosive, people can use relatively cheap materials to make battery components such as storage tanks and pumps. Reducing costs is crucial to power storage. The U.S. Department of Energy recently set a goal to develop batteries that can reduce the storage cost of each kilowatt-hour of electricity to less than $100. If this goal is achieved, the new energy sources such as wind and solar energy it stores will be enough to compete with traditional electricity. Therefore, it can be said that energy storage technology is the key to opening the new energy era. Imre Juk, director of energy storage research at the U.S. Department of Energy's Office of Electricity, believes that this research is very important and is expected to point the way for future batteries, significantly increase battery life and reduce costs. This efficient and durable flow battery is expected to become a standard component of power grid infrastructure. With the assistance of Harvard University's Office of Technology Development, researchers are currently working with several companies to prepare to transform this technology into industrial applications. Harvard University has submitted a report to apply for a patent for this improved flow battery technology.

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