Flexible asymmetric supercapacitors based on NiCo2O4 in a neutral electrolyte achieving 2.4 V voltage window. - Chen, Shiqian; Gao, Ping; Zhang, Dongwei; Lin, Lilin; Huang, Lanqin; Li, Zhuoxi; Lan, Zejian; Jiang, Yue; Ru, Qiang; Zhou, Guofu; Liu, Jun-Ming; Kempa, Krzysztof; et al. (Journal of Alloys & Compounds, 2021)