What is energy density in a battery?

If you’re in the market for a new battery or simply curious about the types of batteries available, you may have come across the term “energy density” before. Energy density is a measure of how much energy a battery can store per unit of weight or volume. The higher the energy density, the more power the battery can provide for its size.

What is a lead acid battery?

A lead acid battery is a type of battery that uses electrodes of lead oxide and metallic lead, which are separated by an electrolyte of sulphuric acid. Its energy density ranges from 40-60 Wh/kg. In an Absorbent Glass Mat (AGM) Lead Acid Battery, the separators between the plates are replaced by a glass fibre mat soaked in electrolyte.

What is the energy density of a lithium-sulfur battery?

Batteries with an energy density above 300 Wh/kg are under development. A value of 500 Wh/kg was demonstrated for a lithium-sulfur battery and much higher values are theoretically expected. Discharge takes place by solution of lithium at the anode and reaction with sulfur at the cathode

What is a lead-acid battery?

The lead–acid battery is a type of rechargeable battery first invented in 1859 by French physicist Gaston Planté. It is the first type of rechargeable battery ever created. Compared to modern rechargeable batteries, lead–acid batteries have relatively low energy density. Despite this, they are able to supply high surge currents.

What is the energy density of AA batteries?

The energy density of AA batteries varies depending on the type of battery. Alkaline AA batteries, which are the most common type of AA battery, have an energy density of around 100-150 Wh/kg. Lithium AA batteries, on the other hand, have a much higher energy density, with some models reaching up to 300 Wh/kg.

Which battery has the highest energy density?

Currently, the lithium-air battery has the highest theoretical energy density, at around 11,400 Wh/kg. However, this battery is still in the research and development stage and has not yet been commercialized. Among commercial batteries, the lithium-ion battery has the highest energy density, with some models reaching up to 265 Wh/kg.