Lithium metal batteries can meet the high energy density required for electric vehicles. However, lithium metal batteries need to improve structural stability to avoid volume changes of the anodes and ensure long life.
Recently, Dr. Tao Tao of Guangdong University of Technology, and Professor Ian Ying Chen of Deakin University and his team reported on the use of graphene foam (GFs) to support lead-like metal oxide (LMONAs) nanosheets as lithium metal on Advanced Functional Materials. Study of the anode of a battery.
Dr. Baozhi Yu said: "We have functionalized 3D graphene foams with a range of metal oxides, including manganese (IV) oxide, tin (IV) oxide and cobalt (II, III). Using functionalized foams with liquids Li contact, which is beneficial to the uniform distribution of Li. Studies have shown that the excellent Li wettability of graphene foam is driven by the redox reaction between Li metal and metal oxide. Manganese (IV) oxide is immersed in molten Li There will be a highly violent reaction. "
Compared with pure Li, Li-Mn / graphene foam (GF) anode has more stable constant current cycling performance. In addition, the full cell assembled with Li-Co oxide as the cathode shows that Li-Mn / GF has excellent rate performance and cycle performance.