Environmental Networking Platform for Children and Youth by SAMSUNG E&A
Stay connected with Eco-generation :
| Share 
| 
- Home >
- Our Actions >
- Ambassador report
2
Comments
lithium-ion batteries [November Thematic Report] |
|---|
|
by pallavi singh | 25-11-2022 23:10
|
|
An advanced battery technology known as a lithium-ion (Li-ion) battery makes use of lithium ions as a crucial part of its electrochemistry. Lithium atoms in the anode are ionised and separated from their electrons during a discharge cycle. From the anode, the lithium ions travel through the electrolyte to the cathode, where they rejoin their electrons and become electrically neutral.
Since they are so tiny, the lithium ions can pass through a micro-permeable barrier that separates the anode from the cathode. Li-ion batteries are able to have a very high voltage and charge storage per unit mass and unit volume in part due to lithium's small size, which places it third in the periodic table after hydrogen and helium. Numerous materials can be used as electrodes in Li-ion batteries. The most typical cathode and anode materials are lithium cobalt oxide (cathode) and graphite (anode), and these materials are most frequently found in portable electronic devices like laptops and cell phones. Other cathode components include lithium iron phosphate and lithium manganese oxide, which are utilised in hybrid and electric cars, respectively. As an electrolyte, ether (a class of organic chemicals) is frequently used in Li-ion batteries. What are some advantages of Li-ion batteries? Li-ion batteries have a variety of benefits over the other premium rechargeable battery technologies (nickel-cadmium or nickel-metal hydride). The energy density of these batteries is among the highest available (100-265 Wh/kg or 250-670 Wh/L). Additionally, compared to Ni-Cd or Ni-MH battery technology, Li-ion battery cells have a voltage output of up to 3.6 Volts. In order to power high-power applications, they can deliver a lot of current, which Additionally, Li-ion batteries require less upkeep and do not require regular cycling to extend their battery life. The memory effect, a negative phenomenon where repeated partial discharge/charge cycles can cause a battery to "remember" a reduced capacity, does not exist with lithium-ion batteries. Compared to Ni-Cd and Ni-MH, which also exhibit this effect, this is a benefit. Additionally, Li-ion batteries have a low self-discharge rate of 1.5 to 2% monthly. They are safer to dispose of than Ni-Cd batteries because they don't contain the hazardous metal cadmium. These benefits have caused Li-ion batteries to overtake Ni-Cd batteries as the industry standard for portable electronic devices (such as smartphones and laptops). In some aerospace applications, such as the newer, more environmentally friendly Boeing 787, where weight is a significant cost concern, lithium-ion batteries are also utilised to power electrical systems. Li-ion technology holds a lot of promise from a clean energy standpoint because of possible uses in battery-operated vehicles. The Nissan Leaf and the Tesla Model S, two of the most popular electric vehicles on the market today, both rely heavily on Li-ion batteries for power. What are some disadvantages of Li-ion batteries? Li-ion batteries still have a lot of drawbacks, notably in terms of safety, despite their technological promise. High voltages can harm lithium-ion batteries because of their propensity to overheat. This occasionally results in thermal runaway and combustion. Significant issues have resulted from this, most notably the fleet of Boeing 787s being grounded following reports of onboard battery fires. Many shipping companies decline to transport large quantities of batteries by plane due to the risks involved with these batteries. Li-ion batteries need safety systems to regulate internal pressure and voltage, which can sometimes add weight and reduce performance. Li-ion batteries can age, which means they can lose capacity and frequently stop working after a while. Their price, which is about 40% more than Ni-Cd, is another obstacle to their general adoption. A crucial part of the technology's present research involves addressing these problems. Finally, even though Li-ion batteries have higher energy densities than previous types of batteries, they are still around 100 times less energy dense than gasoline (which has an energy density of 12,700 Wh/kg by mass or 8760 Wh/L by volume) |
|
|
|
|
Previous : Environment and health [Novemb...
2 Comments
Hello, this is your mentor Minnkyung.
Thank you for sharing your knowledge on Li-ion batteries. There are significant disadvantages, as well as advantages, of using Li-ion batteries, so I guess we will need to keep on gaining awareness and developing technologies to overcome the drawbacks and maximize the benefits.
I'll be looking forward to your next report :)
Posted 07-12-2022 11:17
Hi, pallavi singh!
This is your mentor, Yoon.
Thank you for sharing your knowledge of lithium-ion batteries (LIBs). You did well in dealing with the advantages and disadvantages of LIBs.
Great job on writing the thematic report.
I am looking forward to reading your following report!
Posted 03-12-2022 14:58