To further improve the capacity, charge rate and cycling stability has become urgent issues to be solved for lithium-ion batteries (LIBs). In our study, we have synthesized nanoporous CoO nanowire clusters on three-dimensional (3D) porous graphene cloth (denoted as CoO-NW@GC) via a facile hydrothermal reaction and subsequent annealing process. The selfsupported graphene cloth is provided with large surface area, high porosity and superior electric conductivity, which can greatly contribute to the fast electron and ion transport. Due to the nanoporous CoO nanowire clusters uniformly in situ depositing on the robust 3D skeleton of GC substrate, the CoO-NW@GC hybrid as anode for LIBs achieves 1190 mAh/g and 429 mAh/g under the current densities of 0.2 A/g and 3.2 A/g, respectively. After more than 200 cycles at a current density of 0.5 A/g, the capacity still maintains 1100 mAh/g. The CoO-NW@GC illustrates high specific capacity, good stability as well as excellent rate performance.

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A combination of optimization methods has been developed to help compensate for the weak points of molybdenum disulfide (MoS2), including poor electronic conductivity and large volume expansion, for better exhibiting its advantages such as high capacity and stability in the fields of lithium/sodium-ion batteries (LIBs/SIBs). In the study, nitrogen-doped three-dimensional graphene supporting MoS2 hydrangea nanoflowers with a nitrogen-doped carbon intercalation (MoS2/NC@N3DG) hierarchical composite has been designed and prepared in a simple one-step hydrothermal and annealing way. The distinctly expanded spacing between MoS2 interlayers can facilitate the ion diffusion and the doped nitrogen atoms can markedly improve the electronic conductivity. Therefore, the MoS2/NC@N3DG composite electrode shows outstanding rate capability and excellent cycling performance for both LIBs (1497/1300 mA h g–1 at 0.2/1 A g–1 after 200/500 cycles) and SIBs (513/364 mA h g–1 at 0.2/1 A g–1 after 200/500 cycles). This work provides a promising scheme for designing advanced two-dimensional layered metal dichalcogenide materials for high-performance LIBs and SIBs.