In the field of Lithium Ion Batteries, the need for energy is increasing day by day in our world, which has become a global field with rapid advances in technology in recent years.
Since the beginning of civilization, energy sources have been constantly researched to ensure a regular and comfortable standard of living, and resources such as fossil fuels, nuclear power and solar energy have been used as energy sources.
Rapid consumption of fossil beds, whose reserves are decreasing day by day; environmental problems such as global warming and air pollution have reached great levels, thus further increased interest in cheaper, environmentally friendly and safe alternative energy sources.
Since fossil fuels do not have renewable energy sources, alternatives need to be found.
One of the most important issues of edible energy sources is energy storage in particular.
Energy Storage Needs with Lithium Ion Batteries
Portable electronic devices, communication devices (e.g., mobile phones, portable computers and navigation devices, etc.), computer memory systems, medical devices (tiny circuits placed in the human body), electric and hybrid vehicles, environmental protection and sensors need energy to work continuously.
Therefore, the requirements for energy storage are constantly increasing.
In parallel with these developments, refillable lithium batteries with high specific energy, high energy storage capacity and high cycle number compared to their low size have recently become an alternative energy source that has been studied with great care.
Batteries; electrochemical devices that convert chemical energy into electrical energy.
These batteries have the possibility to be produced from small sizes to large sizes and due to their high capacity, they quickly started to replace lead-acid and nickel-cadmium batteries.
Especially in recent years, the development of lithium-ion batteries is heading towards the golden age.
Rapidly increasing sales with consumers' interest in technological tools such as portable computers; Investments in lithium-ion batteries are growing, especially given the laws passed by governments on the environment and fuel emissions, and there are many commercial firms and institutions working on the development of these batteries.
The first commercial lithium-ion batteries with high energy density and high discharge voltage (3.7 volts) were commercially released by Japan's Sony Energetic in 1991 and are still successfully used commercially.
Although rechargeable batteries are promising today, there are still many problems with optimizing them.
Increased Battery Usage
Increased battery use poses a potential danger to human health and the environment. Therefore, used batteries need to be collected, transported and reused separately to avoid danger.
In addition, reducing dangerous and harmful metals in batteries is an important issue. Nevertheless, these non-venoming batteries, which can be produced with many materials and different production methods, are available for reusable resources.
In the long term, more work needs to be done on issues such as the stability of cell units of batteries, control of the time during charging and discharge, high quality and low cost.
So far, major changes have been observed, especially in materials used in lithium-ion batteries since 1990.
Cathode materials, especially lithium-ion batteries, have undergone major technological evolutions. When taken as an anode, graphite is still the most popular material in such batteries.
When the properties of graphite are examined, it is seen that it has a volume capacity of approximately 372 mAh/gr gravimetric and 818 Ah/l. In addition to the preference of graphite as an anode material, a number of metals were also studied as anode material.
The main reason for this is that they have much higher capacities than graphite.
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Prepared by : Cigdem ATAY
Edited by : Samed GURGUROGLU