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[求助]
毕业论文翻译，急，求助，万分感谢，题目与摘要
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题目：Superhigh capacity and rate capability of high-level nitrogen-doped graphene sheets as anode materials for lithium-ion batteries 摘要：A new facile approach is proposed to synthesize nitrogen-doped graphene sheets with the nitrogen-doping level as high as 7.04 at.% by thermal annealing pristine graphene sheets and low-cost industrial material melamine. The high-level nitrogen-doped graphene sheets exhibit a superhigh initial reversible capacity of 1123 mAh/g at a current density of 50 mA/g. More significantly, even at an extremely high current density of 20 A/g highly stable capacity of about 241 mAh/g could still be obtained. Such an electrochemical performance is superior to those previously reported nitrogen-doped graphene sheets.The excellent electrochemical performance can be attributed to the two-dimensional structure, disor-dered surface morphology, high nitrogen-doping level, and the existence of pyridinic nitrogen atoms. The results indicate that the high-level nitrogen-doped graphene sheets could be a promising anode material for high-performance lithium-ion batteries. |
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罗雷: 金币+15, 翻译EPI+1, ★★★★★最佳答案, 谢谢 2013-05-19 08:01:13
罗雷: 金币+15, 翻译EPI+1, ★★★★★最佳答案, 谢谢 2013-05-19 08:01:13
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超高的容量和速度的高质量氮掺杂石墨烯作为锂离子电池阳极材料 提出了一个新的简便的方法由退火后的原始石墨烯薄片和低成本的工业材料三聚氰胺合成氮掺杂石墨烯薄片，氮掺杂量高达7.04%。高质量氮掺杂石墨烯薄片在电流密度50 mA / g具有超高的初始可逆容量1123 mAh / g。更重要的是,即使在一个非常高的电流密度 20A/ g高依然拥有约241 mAh / g的容量。这样的电化学性能是优于之前报道的氮掺杂石墨烯薄片。优秀的电化学性能来至于其二维结构、混乱的表面形态、高氮掺杂水平和存在的pyridinic氮原子。结果表明,高质量氮掺杂石墨烯薄片层会是一个有前途的高性能锂离子电池阳极材料。（那个单词不懂） |
2楼2013-05-16 17:49:13
