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angellove3626ľ³æ (ÖøÃûдÊÖ)
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Sample TextSample TextFig.3 shows the voltage profiles (2nd cycle) of HBTQ in 1 M LiPF6/EC+DEC electrolyte at a current density of 500 mA g-1. It reveals that HBTQ has a rather flat voltage plateau at about 2.15 V and the curves are relatively sloping in the potential range of 1.6¨C1.0 V at the 1st cycle, and the 2.15V plateau capacity approximately 44% composes the aggregate capacity, it has an overall uptake capacity of 2.8 Li per unit formula for the HBTQ, whereas the insertion of the 3.2 Li ions occurs at a potential range of 1.0-1.6 V. According to the mechanism of sheme 2, HBTQ has a theoretical capacity of 628 mAh g¨C1, because discharge voltage reached 1.0V, positive material was inserted by ca. 6.5 Li ions(initial capacity 341 mAh g¨C1); thus, when discharge voltage was down to 0.1V, all of Li ions was released (scheme 2). An average discharge voltage of 2.8 V and discharge capacity mostly from about 2.8V high-tension plateau after 2nd cycle. These results are highly consistent with the CV analysis. [ Last edited by qingshaojun0823 on 2009-9-4 at 21:26 ] |
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pitlord999
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linghanyuan(½ð±Ò+1,VIP+0):лл½»Á÷ 8-25 23:27
angellove3626(½ð±Ò+4,VIP+0):Õâ´Î·ÒëµÄ²»ÔõôµÎ£¬²»¹ýÈÔÈ»¸Ðл£¡ 8-28 08:21
linghanyuan(½ð±Ò+1,VIP+0):лл½»Á÷ 8-25 23:27
angellove3626(½ð±Ò+4,VIP+0):Õâ´Î·ÒëµÄ²»ÔõôµÎ£¬²»¹ýÈÔÈ»¸Ðл£¡ 8-28 08:21
| Voltage profiles (second cycle) of HBTQ in 1 M LiPF6/EC+DEC electrolyte at a current density of 500 mA g-1 are presented in Fig. 3. It reveals that HBTQ has a rather flat voltage plateau at about 2.15 V, and the curves are relatively sloping in the potential range of 1.6¨C1.0 V at the first cycle, where the plateau capacity of 2.15V contributes approximately to 44% of the aggregate capacity. The overall uptake capacity for the HBTQ is 2.8 Li per unit formula, and the insertion of the 3.2 Li ions occurs at a potential range of 1.0-1.6 V. According to the mechanism of sheme 2, HBTQ has a theoretical capacity of 628 mAh g¨C1, due to the fact that discharge voltage had reached 1.0V, and positive material was inserted by ca. 6.5 Li ions (initial capacity 341 mAh g¨C1). Therefore, when discharge voltage dropped to 0.1V, all Li ions were released (scheme 2). An average discharge voltage of 2.8 V were observed after the second cycle, and discharge capacity was mostly obtained from a high-tension plateau of about 2.8V. These results are highly consistent with the CV analysis. |
2Â¥2009-08-25 19:14:21
lizzie_su
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linghanyuan(½ð±Ò+1,VIP+0):лл½»Á÷ 8-25 23:28
angellove3626(½ð±Ò+2,VIP+0):3ks 8-28 08:22
linghanyuan(½ð±Ò+1,VIP+0):лл½»Á÷ 8-25 23:28
angellove3626(½ð±Ò+2,VIP+0):3ks 8-28 08:22
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From Fig.3 we can easily find a neatly flat plateau at about 2.15 V and a gentle slope in the range of 1.6¨C1.0 V at the 1st cycle with current density of of 500 mA g-1. The plateau accounts for 44% of the aggregate capacity. ÎÒ¶ÔÕâ¸ö²»Ê죬Èç¹ûÂ¥Ö÷Óпգ¬²»ÈçÓÃÖÐÎÄЩ¸ö´ó¸ÅÒâ˼£¬ÄÇÑùÎÒÄÜ·µÃ¸üºÃһЩ¡£ |
3Â¥2009-08-25 20:46:36
goodtimega
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angellove3626(½ð±Ò+4,VIP+0):3ks£¬±ä»¯²»´ó 8-28 08:22
angellove3626(½ð±Ò+4,VIP+0):3ks£¬±ä»¯²»´ó 8-28 08:22
| Shown in Fig.3 are the voltage profiles (2nd cycle) of HBTQ in 1 M LiPF6/EC+DEC electrolyte at a current density of 500 mA g-1. HBTQ has a rather flat voltage plateau at about 2.15 V and the curves are relatively sloping in the potential range of 1.6¨C1.0 V in the 1st cycle. The corresponding 2.15V plateau capacity composes approximately 44% of the aggregate capacity. It has an overall uptake capacity of 2.8 Li per unit formula for the HBTQ, whereas the insertion of the 3.2 Li ions occurs at a potential range of 1.0-1.6 V. According to the mechanism of sheme 2, HBTQ can have a theoretical capacity of 628 mAh g¨C1, since 1.0 V of discharge voltage corresponds to positive material inserted by ca. 6.5 Li ions(initial capacity 341 mAh g¨C1). As a result, when discharge voltage was down to 0.1V, all of Li ions was released (scheme 2). An average discharge voltage of 2.8 V and discharge capacity arise mostly from about 2.8V high-tension plateau after the 2nd cycle. These results are in accordance with the CV analysis. |
4Â¥2009-08-26 06:15:07














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