The volume of the finished tank will be 5 cubic meters. If we assume that the tank will be filled with an exact mixture of sulphuric acid and water like in the small one battery what will be the battery properties. Does the dimensions of the battery determines the capacity of one single cell?
Especially in the field of electromobility, research is currently being conducted on lithium battery energy density. Future rechargeable lithium batteries are expected to achieve an energy density of over 400 Wh/kg based on Li-sulphur or up to 800 Wh/l based on Li-Air.
In 2008, lithium-ion batteries had a volumetric energy density of 55 watt-hours per liter; by 2020, that had increased to 450 watt-hours per liter.
The Coulomb Efficiency (CE) describes the charge efficiency with which the energy stored in the battery can be extracted again, i.e., used. In addition to a high energy density, lithium-ion batteries have a Coulomb efficiency of almost 100 percent: almost all the current you charge into a lithium-ion battery can be withdrawn again.
Although negative electrodes made of lithium cobalt nickel, for example, allow an energy density of up to 240 watt-hours per kilogram, lithium-ion batteries with around 170 watt-hours per kilogram are used more frequently. Because of the lower energy density, these batteries offer more than 500 charging cycles and are thus more durable overall.
It can be obtained by multiplying the specific capacity (Ah/kg) with operating battery voltage (V). Specific capacity measures the amount of charge that can be reversibly stored per unit mass. It is closely related to number of electrons released from electrochemical reactions and the atomic weight of the host.