A Comparison Between Wet and Dry Electrode Coating Technology for Li-Ion Battery

The consumption of energy over the past few years has increased globally. In order to meet future energy demands, conventional fossil fuels will not be sufficient; therefore, renewable energy will be required as an alternative. Energy storage is essential for energy penetration because renewable energy sources are intermittent. Due to performance and cost, lithium-ion battery is the most popular energy storage technology. In terms of production, the electrodes and packaging of lithium-ion batteries are the key elements. There are majorly two main technologies used to manufacture electrodes. Wet electrode coating technology, first utilized by Sony in the 1990s and still used today, is the most popular and basic technology. However, the wet process has drawbacks, including high costs, hazardous chemicals, expensive solvent recovery, and energy-intensive electrode drying. In view of these shortcomings, researchers proposed another technique known as dry electrode coating technology. This technique has several advantages over wet coating technology, like avoiding toxic solvent usage, having a better discharge rate, and easy manufacturing. This review envisaged to discuss the problems associated with wet electrode coating technology and illustrate how dry coating technology can overcome such problems.