“…To meet all these requirements, nanosheets, a kind of two-dimensional (2D) nanomaterial with excellent physical and mechanical properties including ultra-thin thickness, high flexibility, stretchability, and excellent adhesion have triggered great research enthusiasm and become the optimal material for wearable power supply device due to these remarkable characteristics ( Kim et al., 2021 ; Liang et al., 2018 ; Nie et al., 2020 ; Zhong et al., 2019 ). Especially, the extremely large surface-to-volume ratio of the nanosheets provides the miniaturization of wearable power supply devices and greatly increases the capability of power storage and supply for wearable power supply devices ( Jin et al., 2020 ; Zhou et al., 2021 ) considering that nanosheets bring numerous electrocatalytic sites and thus catalyze the electrochemical reaction at the electrode. A large number of nanosheets, e.g., graphene analogues (GA), including graphene oxide (GO) nanosheets, reduced graphene oxide (rGO) nanosheets, and graphdiyne nanosheets, and transition metal element nanosheets, including MoSe 2 nanosheets, Ru-Ni nanosheets, MoS 2 nanosheets, ZnO nanosheet, and organic nanosheets like PLLA nanosheets, have been produced by researchers ( Careta et al., 2021 ; Guo et al., 2019 ; Liu et al., 2021 ; Yang et al., 2019a , 2019b ; Yu et al., 2019 ; Zhang et al., 2018b , 2021 ) since the first-developed nanosheets, graphene, was reported in 2004 ( Novoselov et al., 2004 ).…”