Adv. Mater. 高容量、高倍率、长循环钠离子电池负极材料?The design of the SnS2 -RGO hybrid structure for reversible storage of Na+ was based on the following materials principles:1) a large interlayer spacing in the SnS2 structure benefi ting Na+ intercalation and diffusion, and more buffering space for beneficial adjustment the volume changes in the host during cycling; 2) fast collection and conduction of electrons through a highly conductive RGO network;3) inhibition of Sn (NaxSn) aggregation during cycling by RGO after material hybridization. The SnS2 -RGO anode delivered a high charge (desodiation) specific capacity of 630 mAh g?1 at 0.2 A g?1 , and more impressively, 544 mAh g?1 after a ten-fold increase in current density to 2 A g?1 . The electrode was also very stable to cycling; providing a nearly unvarying capacity of 500 mAh g?1 at 1 A g?1 even after 400 charge-discharge cycles.http://onlinelibrary.wiley.com/d ... .201306314/abstractTOC.jpg查看更多5个回答 . 7人已关注