Structure Flexibility Enabled by Surface High-Concentration Titanium Doping for Durable Lithium-Ion Battery Cathodes

at 0.1 C) and long battery durability of Ni-rich cathodes, surpassing most commercial products on the market. The strategy of surface optimization using flexible structural units to stabilize Ni-rich layered oxides can be broadly applied to other battery materials to address performance issues due to the similarities among layered-structured cathode materials.