▎ 摘　　要

NOVELTY - Potassium-doped alpha-manganese dioxide nano-rod has length of 50-300 nm, is claimed. The binder is polyvinylidene fluoride (preferred), polyethylene glycol-1000 (preferred), polyethylene glycol-2000, and/or polyacrylic acid. The thickener is polyvinylidene fluoride (preferred), carboxycellulose (preferred), hydroxyethyl cellulose, hydroxypropyl cellulose, polyethylene glycol-600, and/or carbon nanotubes. The solvent is deionized water, N-methylpyrrolidone (preferred), ethanol, and/or N-N dimethylamide. The conductive agent powder is acetylene black, SUPER-P, and/or graphene. USE - The nano-rod is useful as direct-writing forming ink and direct-write forming zinc ion battery anode in direct writing forming zinc ion battery (all claimed). ADVANTAGE - The nano-rod has high platform value of 105Pa, and highest specific capacity of 187.3 mA/g, which is four times that of conventional 2D electrodes (the highest specific capacity is 45 mA/g) and ensures the electrochemical results show that the zinc-ion battery assembled with the direct-writing cathode can be stably cycled for 100 times at a current density of 50 mA/g. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing potassium-doped alpha-manganese dioxide nano-rod.