Image (IMAGE) World Scientific Caption NiCo-doped C-N hollow nanotube composites prepared through direct pyrolysis of Ni/Co salt, dicyandiamide and glucose, present excellent performance as the cathode catalysts of neutral Zn-air battery. Credit Qingfeng Yi <em>et al</em>. Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.