Enhanced bifunctional catalytic activities of N-doped graphene by Ni in a 3D trimodal nanoporous nanotubular network and its ultralong cycling performance in Zn-air batteries

Yanyi Zhang, Xiangpeng Kong, Xiaorong Lin, Kailong Hu, Weiwei Zhao, Guoqiang Xie, Xi Lin, Xingjun Liu, Yoshikazu Ito, Hua‐Jun Qiu