| ²é¿´: 1143 | »Ø¸´: 6 | ||
| ±¾Ìû²úÉú 1 ¸ö ·ÒëEPI £¬µã»÷ÕâÀï½øÐв鿴 | ||
Ó´Ó´williamľ³æ (СÓÐÃûÆø)
|
[ÇóÖú]
С¶ÎÓ¢ÎÄ·Ò룬ÇóÖú¡£
|
|
|
An in situ sulfur deposition route has been developed for synthesizing sulfur¨Ccarbon composites as cathode materials for lithium¨Csulfur batteries. This facile synthesis method involves the precipitation of elemental sulfur at the interspaces between carbon nanoparticles in aqueous solution at room temperature. The product has been characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, charge¨Cdischarge measurements, and electrochemical impedance spectroscopy. The sulfur¨Ccarbon composite cathode with 75 wt.% active material thus obtained exhibits a remarkably high first discharge capacity of 1116 mAh g−1 with good cycle performance, maintaining 777 mAh g−1 after 50 cycles. The significantly improved electrochemical performance of the sulfur¨Ccarbon composite cathode is attributed to the carbon-wrapped sulfur network structure, which suppresses the loss of active material during charging/discharging and the migration of the polysulfide ions to the anode (i.e., shuttling effect). The integrity of the cathode structure during cycling is reflected in low impedance values observed after cycling. This facile in situ sulfur deposition route represents a low-cost approach to obtain high-performance sulfur¨Ccarbon composite cathodes for rechargeable Li¨CS batteries. |
» ²ÂÄãϲ»¶
085700×ÊÔ´Óë»·¾³308Çóµ÷¼Á
ÒѾÓÐ4È˻ظ´
ÉúÎïѧµ÷¼ÁÕÐÈË£¡£¡£¡
ÒѾÓÐ4È˻ظ´
0817 »¯Ñ§¹¤³Ì 299·ÖÇóµ÷¼Á ÓпÆÑоÀú ÓжþÇøÎÄÕÂ
ÒѾÓÐ17È˻ظ´
Ò»Ö¾Ô¸Î人Àí¹¤²ÄÁϹ¤³Ìר˶µ÷¼Á
ÒѾÓÐ5È˻ظ´
0856µ÷¼Á£¬ÊÇѧУ¾ÍÈ¥
ÒѾÓÐ7È˻ظ´
É격26Äê
ÒѾÓÐ3È˻ظ´
Ò»Ö¾Ô¸¼ªÁÖ´óѧ²ÄÁÏѧ˶321Çóµ÷¼Á
ÒѾÓÐ10È˻ظ´
0703»¯Ñ§µ÷¼Á £¬Áù¼¶Òѹý£¬ÓпÆÑоÀú
ÒѾÓÐ12È˻ظ´
294Çóµ÷¼Á²ÄÁÏÓ뻯¹¤×¨Ë¶
ÒѾÓÐ13È˻ظ´
288Çóµ÷¼Á
ÒѾÓÐ14È˻ظ´

ruiyuan121
ľ³æ (ÖøÃûдÊÖ)
- ·ÒëEPI: 6
- Ó¦Öú: 49 (СѧÉú)
- ½ð±Ò: 4842.1
- É¢½ð: 633
- ºì»¨: 22
- Ìû×Ó: 1034
- ÔÚÏß: 4035.5Сʱ
- ³æºÅ: 1133811
- ×¢²á: 2010-10-28
- רҵ: ÎÞ»ú·Ç½ðÊôÀà¹âµçÐÅÏ¢Ó빦

2Â¥2013-04-25 21:44:55
Ó´Ó´william
ľ³æ (СÓÐÃûÆø)
- Ó¦Öú: 0 (Ó×¶ùÔ°)
- ½ð±Ò: 1784.9
- Ìû×Ó: 205
- ÔÚÏß: 69.2Сʱ
- ³æºÅ: 1254368
- ×¢²á: 2011-04-03
- ÐÔ±ð: GG
- רҵ: ¹ÌÌåÓë±íÃæÎïÀí»¯Ñ§

3Â¥2013-04-25 22:26:15
ÄϾ©¹¤´ó
ľ³æ (СÓÐÃûÆø)
- ·ÒëEPI: 14
- Ó¦Öú: 0 (Ó×¶ùÔ°)
- ½ð±Ò: 1971.3
- É¢½ð: 102
- ºì»¨: 6
- Ìû×Ó: 173
- ÔÚÏß: 81.1Сʱ
- ³æºÅ: 1410020
- ×¢²á: 2011-09-20
- ÐÔ±ð: GG
- רҵ: ¸ß·Ö×Ó×é×°Ó볬·Ö×ӽṹ
¡¾´ð°¸¡¿Ó¦Öú»ØÌû
¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï
Ó´Ó´william: ½ð±Ò+20, ·ÒëEPI+1, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸, ·ÒëµÄºÜºÃ£¬Ð»Ð» 2013-04-26 11:27:30
Ó´Ó´william: ½ð±Ò+20, ·ÒëEPI+1, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸, ·ÒëµÄºÜºÃ£¬Ð»Ð» 2013-04-26 11:27:30
| Ìá³öÁËÒ»ÖÖÔλ³Á»ýÁòµÄ·½·¨À´ÖƱ¸Áò̼¸´ºÏÎïÒÔ×÷Ϊï®-Áòµç³ØµÄÑô¼«²ÄÁÏ¡£ÕâÖֺϳɷ½·¨Í¨¹ýÊÒÎÂÏÂÔÚ·ÖÉ¢ÔÚË®ÈÜÒºÖеÄ̼ÄÉÃ×Á£×ÓÖ®¼äµÄ¼ä϶ÖгÁ»ýÔªËØÁò¶øÊµÏÖ¡£Í¨¹ýX-ÉäÏßÑÜÉ䡢ɨÃèµç¾µ¡¢Í¸Éäµç¾µ¡¢ºãÁ÷³ä·Åµç¡¢µç»¯Ñ§½»Á÷×迹µÈ¶ÔÑùÆ·½øÐвâÊԺͱíÕ÷¡£Í¨¹ýÕâÖÖ·½·¨µÃµ½Á˺¬»îÐÔ²ÄÁϵÄÖÊÁ¿·ÖÊýΪ75%µÄÁò̼¸´ºÏÎïµç¼«£¬ÕâÖֵ缫ÏÔʾÁ˷dz£ºÃµÄÊ״γä·ÅµçÄÜÁ¦£¬¸ß´ï1116 mAh g-1£¬²¢¾ßÓÐÁ¼ºÃµÄ³ä·ÅµçÑ»·ÐÔÄÜ£¬ÔÚ50´Î³ä·ÅµçÑ»·ºó»¹±£³Ö777 mAh g-1¡£Áò̼¸´ºÏÎïµç¼«µÄµç»¯Ñ§ÐÔÄÜÏà±È´«Í³²ÄÁÏÓÐÁ˺ܴóÌá¸ß£¬Ö÷ÒªÊÇÓÉÓÚ̼¶ÔÓÚÁòµÄÍøÂç½á¹¹ÐγÉÁ˰ü¹ü¡£ÕâÖÖ°ü¹üÒÖÖÆÁ˳ä·Åµç¹ý³ÌÖлîÐÔ²ÄÁϵÄËðºÄºÍ¶àÁò¸ùÀë×ÓÏòÒõ¼«µÄÇ¨ÒÆ£¨¼´´©ËóЧӦ£©¡£Ñô¼«½á¹¹ÔÚ³ä·ÅµçÑ»·¹ý³ÌÖеÄÍêÕûÐÔ¿ÉÒÔͨ¹ýÑ»·ºóµÄµÍ×迹ֵÀ´ÑéÖ¤¡£¸ÃÖÖÔλÁò³Á»ý·¨Ìá³öÒ»ÖÖÖÆ±¸µÍ³É±¾¸ßÐÔÄܵÄï®-Áò³äµçµç³ØµÄÁò̼¸´ºÏÎïÑô¼«µÄ·½·¨¡£ |
4Â¥2013-04-25 23:24:32
|
±¾ÌûÄÚÈݱ»ÆÁ±Î |
» ±¾ÌûÒÑ»ñµÃµÄºì»¨£¨×îÐÂ10¶ä£©
5Â¥2013-04-25 23:48:53
Ó´Ó´william
ľ³æ (СÓÐÃûÆø)
- Ó¦Öú: 0 (Ó×¶ùÔ°)
- ½ð±Ò: 1784.9
- Ìû×Ó: 205
- ÔÚÏß: 69.2Сʱ
- ³æºÅ: 1254368
- ×¢²á: 2011-04-03
- ÐÔ±ð: GG
- רҵ: ¹ÌÌåÓë±íÃæÎïÀí»¯Ñ§

6Â¥2013-04-26 11:27:46
Ó´Ó´william
ľ³æ (СÓÐÃûÆø)
- Ó¦Öú: 0 (Ó×¶ùÔ°)
- ½ð±Ò: 1784.9
- Ìû×Ó: 205
- ÔÚÏß: 69.2Сʱ
- ³æºÅ: 1254368
- ×¢²á: 2011-04-03
- ÐÔ±ð: GG
- רҵ: ¹ÌÌåÓë±íÃæÎïÀí»¯Ñ§

7Â¥2013-04-26 11:28:24













»Ø¸´´ËÂ¥
Ó´Ó´william