A new type of hollow urchin-shaped NCM811 ternary-structure material was prepared for high rate charge/ discharge capability and efficient CO2 adsorption. Ni2+/Ni3+, Co2+/Co3+ and Mn4+exist simultaneously in the NCM811 material, and the atomic ration of Ni: Co: Mn is close to 8: 1: 1. In KOH, the NCM811 material shows a pseudocapacitance behavior and achieves a remarkable specific discharge capacity of 208.3 F/g. When the current density is improved to 20 A/g, the capacity still keeps 52.3 %. The excellent rate capability is associated with the hollow urchin-shaped porous structure which provi...
