1 Supporting information Flexible All-solid-state Ultrahigh-energy Asymmetric Supercapacitors Based on Tailored Morphology of NiCoO 2 /Ni(OH) 2 /Co(OH) 2 Electrodes Tianfeng Qin, a Haoqian Li, a Ruojia Ren, a Jiaxin Hao, a Yuxiang Wen, a Zilei Wang, a Juanjuan Huang, a Deyan He, a Guozhong Cao, *a,b Shanglong Peng *a a Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, P.R. China b Department of Materials and Engineering, University of Washington, Seattle, Washington 98195-2120, United States * E-mail address: pengshl@lzu.edu.cn； E-mail address: gzcao@u.washington.edu; Tel.: +1 206 616 9084 Fig. S1 (a) High and (c) low-magnification SEM images for Ni sample. (c) Enlarged-view SEM image of CoNi sample. Fig. S2 (a) XRD pattern, (b) Raman spectrum and (c) XPS curve of active carbon cloth (ACC). Electronic Supplementary Material (ESI) for CrystEngComm. This journal is © The Royal Society of Chemistry 2018