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Adv. Mater. ¸ßÈÝÁ¿¡¢¸ß±¶ÂÊ¡¢³¤Ñ»·ÄÆÀë×Óµç³Ø¸º¼«²ÄÁÏ ÒÑÓÐ4È˲ÎÓë
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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/abstract TOC.jpg |
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