Without realizing it, we have it everywhere. The phones, computers, tablets, readers, players. Not having it would mean giving up almost all electronics which can be recharged. We are talking about Li-ion batteries, a small miracle that saw the light at the beginning of the twentieth century. However, still meet today's market, or with them, manufacturers will soon say goodbye?Li-ion batteries have been around for 25 years
Production of lithium-ion batteries in the last twenty years one of the fastest growing and most promising chemical industry. Because lithium is a light metal, has a good electrochemical potential and due to their weight provides a large amount of energy is not a coincidence that scientists chose it for their experiments.
Already in 1912, they tried to make the batteries use, but finally managed it until the seventies. Then the ship to stores came first lithium battery, which however could not be recharged. "Attempts to rechargeable lithium batteries were failing mainly because of safety. In the early nineties but scientists have discovered that if its attempts to use non-metallic lithium battery and use lithium ions get safe equivalent. There can also be recharged, "explained Radim Tlapak of BatteryShop.cz. In 1991, Sony Corporation introduced the first version of the rechargeable Li-ion battery. Immediately after her then appeared several other companies that these batteries placed on the market under their own names.
In addition to low weight and good electrochemical potential are Li-ion batteries against other advantage and its low maintenance. "In addition, do not have memory, so it does not matter if a person leaves discharge as the phone of extinction," said Radim Tlapak. Some batteries can in fact remember this fact and you do so unwittingly diminishes battery capacity. Memory effect self-discharge suffering mainly Ni-MH cells, precursors of lithium batteries. These cells are used in rechargeable batteries since the early 90s of the 20th century. Today are included with older types of laptops, camcorders and widespread use have been in the case of cordless tools. Thanks to the unique properties of lithium battery has up to 40% longer life than the outdated Ni-MH batteries.
Despite having Li-ion battery also has its drawbacks. One of the key is their brittleness. They must be hidden in quality and solid packaging, which increases the weight, while reducing their energy potential. They do not like excessive temperature swings and age. Although this problem manufacturers too often does not warn Li-ion battery is subject to aging. During the year, thus reducing battery life regardless of whether one uses a phone or tablet daily or just once a month.
It should however be noted that other types of batteries are also subject to aging, and a Li-ion battery lasts up to five years. Generally, the battery life lasts up to 500 charging cycles. Aging can also slow down the storage batteries in a cool place. Scientists recommend a temperature of about fifteen degrees. "For lithium cells are recommended storage on a full charge, or at least 80 percent of their capacity. Long-term storage of Li-ion battery is the best every 6 months fully charged and discharged and then recharged to the maximum capacity of the battery, "says Radim Tlapak.
Manufacturers are also constantly improving the combination of chemicals in batteries and to the market so every six months to receive doctored and improved Li-ion battery. It seems, therefore, that not only Li-ion battery for a long time from the shelves disappear, but even help reduce the consumption of fossil fuels. Carmakers to them is increasingly resorting and place them in their electric vehicles. For the future, then increase the capacity of the batteries and reduce the need for charging.
Source: tz, editorially modified
The author The world runs on Li-ion batteries. But they are perfect?: převzatý článek