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Ó´Ó´william

ľ³æ (СÓÐÃûÆø)

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An in situ sulfur deposition route has been developed by the
heterogeneous nucleation of sulfur onto conductive carbon black
(Super P) from a solution-based reaction of sodium thiosulfate
with hydrochloric acid. This facile synthesis method can produce
high-purity sulfur¨Ccarbon composites for large-scale manufacturing.
The sulfur¨Ccarbon composite thus produced exhibits discharge
capacities of, respectively, 1116 mAh g−1 in the first cycle and
777 mAh g−1 after 50 cycles. Even after 50 cycles at a higher rate
of C/4 (419 mA g−1), the reversible capacity is still 697 mAh g−1,
which translates to a capacity retention of 82%. The excellent cycle
performance of this sulfur¨Ccarbon composite can be attributed to
the conductive carbon-wrapped sulfur network structure, which
not only decreases the charge transfer resistance but also helps
maintaining the integrity of the electrode structure during cycling.
The carbon black matrix also plays a protective role as an adsorbent
agent to keep the soluble polysulfides within the electrode
structure, avoiding the unwanted shuttle effect during charging.
We believe this facile in situ sulfur deposition route to obtain
sulfur¨Ccarbon composites possessing good electrochemical performance
could enhance the feasibility of practical Li¨CS batteries.

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Ó´Ó´william: ½ð±Ò+20, ·­ÒëEPI+1, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸, À÷º¦°¡£¬²»À¢ÊÇרҵµÄ£¬»¹Óм¸Ð¡¶Î°ïÎÒÒ²·­ÒëÁ˰ɣ¬ÎÒÂíÉÏ·¢Ìû£¬ÄãÊÕÌýÎÒ°É 2013-04-26 20:10:25
An in situ sulfur deposition route has been developed by the heterogeneous nucleation of sulfur onto conductive carbon black (Super P) from a solution-based reaction of sodium thiosulfate with hydrochloric acid.
ԭλÁò³Á»ýÊÇͨ¹ýÈÜÒºÖÐÁò´úÁòËáÄÆÓëÑÎËáµÄ·´Ó¦½«ÒìÖʾ§ÐÍÁò³Á»ýÔÚµ¼µçÌ¿ºÚ£¨Super P£©±íÃæ¡£
This facile synthesis method can produce high-purity sulfur¨Ccarbon composites for large-scale manufacturing.
¸Ã¼òÒ׺ϳɷ¨¿ÉÒÔ´ó¹æÄ£Éú²ú¸ß´¿¶ÈµÄ̼Áò¸´ºÏÎï¡£
The sulfur¨Ccarbon composite thus produced exhibits discharge capacities of, respectively, 1116 mAh g−1 in the first cycle and 777 mAh g−1 after 50 cycles.
Òò´Ë£¬ÖƵõÄ̼Áò¸´ºÏÎïµÄ·ÅµçÈÝÁ¿ÎªµÚһȦΪ 1116mAh g-1£¬50Ȧ֮ºóΪ777mAh g-1
Even after 50 cycles at a higher rate of C/4 (419 mA g−1), the reversible capacity is still 697 mAh g−1, which translates to a capacity retention of 82%.
¼´Ê¹ÒÔC/4½Ï¸ßµÄËÙÂÊɨÃè50Ȧºó£¬¿ÉÄæÈÝÁ¿ÈÔΪ697 mAh g-1£¬Òâζ×ÅÆä¾ßÓÐ82%µÄÈÝÁ¿±£³ÖÂÊ¡£
The excellent cycle performance of this sulfur¨Ccarbon composite can be attributed to the conductive carbon-wrapped sulfur network structure, which
not only decreases the charge transfer resistance but also helps maintaining the integrity of the electrode structure during cycling.
ÓÉÓÚÕâÖÖµ¼µç̼°ü¹üÁòµÄÍø×´½á¹¹²»½ö¿ÉÒÔ½µµÍµçºÉ×ªÒÆµç×裬ÔÚÑ­»·¹ý³ÌÖÐÒ²ÓÐÖúÓÚ±£³Öµç¼«½á¹¹µÄÍêÕûÐÔ£¬Ê¹µÃ̼Áò¸´ºÏÎïÓµÓÐÁ¼ºÃµÄÑ­»·ÌØÐÔ¡£
The carbon black matrix also plays a protective role as an adsorbent agent to keep the soluble polysulfides within the electrode structure, avoiding the unwanted shuttle effect during charging.
Ì¿ºÚ¾ØÕó×÷ΪÎü¸½¼Á½«¿ÉÈÜÐÔÁò¾ÛÎï¹Ì¶¨Ôڵ缫½á¹¹ÄÚÒ²Æðµ½Á˱£»¤×÷Ó㬱ÜÃâÔÚ³äµç¹ý³Ì·¢Éú´©ËóЧӦ¡£
We believe this facile in situ sulfur deposition route to obtain sulfur¨Ccarbon composites possessing good electrochemical performance could enhance the feasibility of practical Li¨CS batteries.
ͨ¹ý´ËÖÖ¼òÒ×µÄԭλÁò³Á»ý·¨ÖƵõÄ̼Áò¸´ºÏÎï¾ßÓÐºÜºÃµÄµç»¯Ñ§ÌØÐÔ£¬Ìá¸ßÁËï®-Áòµç³ØÊµ¼ÊÔËÓõĿÉÄÜÐÔ¡£



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