Before revision: Information about the potential environmental impacts of  post-lithium batteries is scarce. For this reason, this work provides a prospective life-cycle assessment of a hypothetical commercial MgS battery based on primary information obtained for a prototype cell. The Mg-S battery is found to have a good environmental performance with potential to outperform also current lithium-ion batteries in terms of environmental impacts.
After revision: Information about the potential environmental impacts of post-lithium systems such as the magnesium-sulfur (MgS) battery. Therefore, we use life cycle assessment following a cradle-to-gate perspective to quantify the cumulative energy demand and potential environmental impacts per Wh of the storage capacity of a hypothetical MgS battery (46 Wh/kg). Furthermore, we also estimate global warming potential (0.33 kg CO2 eq/Wh) , fossil depletion potential (0.09 kg oil eq / Wh), ozone depletion potential (2.5E-08 kg CFC-11/Wh) and metal depletion potential (0.044 kg Fe eq/Wh), associated with the MgS battery production. The battery is modelled based on an existing prototype MgS pouch cell and hypothetically optimised according to the current state of the art in lithium-ion batteries in terms of environmental impacts.