Synthesis and capacitance properties of N-doped porous carbon/NixCoyOz/carbon micro-nanotubes composites using coal-based polyaniline as a carbon and nitrogen source. - Wang, Xiaoqin; Yang, Yufei; Yang, Nana; Zhao, Jie; Zhang, Yong; Li, Qiaoqin; Chu, Jia; Wu, Bohua; Xiong, Shanxin (Journal of Materials Science: Materials in Electronics, 2019)