All our lives we have heard that orange peels have had multiple uses. From the zest to flavor desserts and savory dishes, to its use in infusions and aromatic teas.
However, among all those known uses, there is one completely unexpected one that until now had gone unnoticed and that could have implications far beyond cooking or household cleaning.
An everyday waste with energy potential
A team of scientists from CSIR-Central Electrochemical Research Institute, India, has discovered that orange peels can become a key element to improve the performance of lead-acid batteries, essential in critical sectors.
Batteries used for:
- Cars and motorcycles: these are the traditional batteries that allow the engine to start.
- Emergency systems: used as electrical backup in case of a blackout.
- Hospitals: keep critical equipment running if the network fails.
- Banks and data centers: ensure that computer systems do not shut down suddenly.
- Industrial facilities: machinery, security or control systems.
- Renewable energies: store energy in small solar or wind installations
Through a specific treatment, This organic waste is transformed into a material in a material full of tiny pores, which greatly increases its surface area and improves the performance of the battery
A minimal change with a big impact
One of the most striking data of the study is that only 0.1% by weight of this material needs to be added to the negative electrode to achieve very significant improvements.
With that small amount, charge acceptance increases by around 89%, in addition to a notable improvement in discharge capacity, which translates into more efficient and faster batteries.
How the material is obtained
The procedure takes place in two phases. First, the shells undergo a carbonization process at high temperatures in an oxygen-free atmosphere. Afterwards, chemical activation is carried out with potassium hydroxide, generating a highly porous structure.
The result is an activated carbon with a huge internal surface area, ideal for optimizing reactions within the battery.
The tests revealed important advances. Batteries incorporating this material showed up to 20% more discharge capacity compared to conventional ones.. Additionally, oxygen and hydrogen gasification voltages were delayed, indicating more stable and efficient operation.
This advance is especially relevant in places where the electricity supply is unstable..
The sustainable component
Beyond the technological impact, this discovery also has a sustainable component. The use of citrus waste allows us to reduce costs and move towards a circular economy model, where waste is transformed into useful resources.
A clear example of how something as everyday as an orange peel can end up playing a key role in the development of energy solutions of the future.