Wedoany.com Report on Mar 6th, Researchers at the University of Tsukuba in Japan recently announced the development of a novel all-solid-state magnesium-air battery. It utilizes nitrogen-doped porous graphene as the cathode, replacing traditional platinum-based materials, and employs a solid polymer electrolyte infused with magnesium chloride. This design effectively addresses the long-standing issue of chemical degradation that has plagued magnesium-air batteries, offering a more economical and safer alternative for electric vehicles and grid energy storage.

Magnesium-air batteries use oxygen from the air as the cathode active material, theoretically achieving energy density comparable to lithium-air systems. However, chloride ions in the electrolyte have historically caused internal chlorination, damaging components and reducing cycle performance. The research team enhanced the structure's resistance to chlorine attack by introducing a graphene-based cathode while maintaining high catalytic activity, significantly improving the battery's stability and durability.

Performance tests indicate that the new system outperforms batteries with platinum cathodes during charge-discharge cycles. This is attributed to the porous structure of the graphene, which accommodates discharge products and facilitates efficient mass transport. The solid-state electrolyte configuration also eliminates the risk of leakage, allowing the battery to maintain its initial performance even when bent at 120 degrees without electrolyte leakage, highlighting its potential applications in flexible electronics and wearable devices.

The researchers noted that magnesium, being a more abundant and cheaper metal than lithium or platinum, helps reduce supply chain risks. The research findings, published in the journal *Advanced Functional Materials*, pave the way for the commercialization of high-capacity, rechargeable magnesium-air batteries. This development is expected to support the advancement of low-cost electrification technologies while enhancing safety.