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Tind iselenide (SnSe 2 ), as an anodem aterial,h as outstandingp otential for use in advanced lithium-ion batteries. However,l ike other tin-based anodes, SnSe 2 suffers from poor cycle life and low rate capabilityd ue to large volume expansion during the repeated Li + insertion/de-insertion process. This work reports an effectivea nd easy strategy to combine SnSe 2 and carbon nanotubes (CNTs) to form a SnSe 2 /CNTsh ybrid nanostructure. The synthesized SnSe 2 has ar egularh exagonal shape with at ypical 2D nanostructure and the carbon nanotubes combine well with the SnSe 2 nanosheets. The hybrid nanostructure can significantly reduce the serious damage to electrodes that occurs during electrochemical cycling processes. Remarkably,t he SnSe 2 / CNTse lectrodee xhibits ah igh reversible specific capacity of 457.6 mA hg À1 at 0.1 Ca nd 210.3 mA hg À1 after 100 cycles. At ac ycling rate of 0.5 C, the SnSe 2 /CNTse lectrode can still achieve ah igh value of 176.5 mA hg À1 ,w hereas av alue of 45.8 mA hg À1 is achieved for the pure SnSe 2 electrode. The enhanced electrochemical performance of the SnSe 2 /CNTs electrode demonstrates its great potential for use in lithiumion batteries.T hus, this work reports af acile approacht o the synthesis of SnSe 2 /CNTsa sap romising anode material for lithium-ionb atteries.Supporting information and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

Highlights Integration of solar cells, BSHs, and LEDs was developed for energy conversion, storage, and utilization in one system. NiCo 2 O 4 //AC BSHs were charged by a-Si/H solar cells for stably driving LEDs showing high performances. Electronic supplementary material The online version of this article (10.1007/s40820-019-0274-0) contains supplementary material, which is available to authorized users.