High-quality mesoporous graphene particles as high-energy and fast-charging anodes for lithium-ion batterie
High-quality mesoporous graphene particles as high-energy and fast-charging anodes for lithium-ion batterie
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DOI：
10.1038/s41467-019-09274-y
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发表时间：
2019-04-01
影响因子：
16.6
通讯作者：
Lu, Yunfeng
中科院分区：
文献类型：
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作者：
Mo, Runwei;Li, Fan;Lu, Yunfeng
石墨烯在电化学储能方面的应用受到极大关注；然而，在综合和其他方面仍然存在挑战。在这里，我们报道了以氧化镁颗粒作为催化剂和模板，通过化学气相沉积合成高质量、氮掺杂、介孔石墨烯颗粒。这些颗粒具有优异的结构和电化学稳定性、电子和离子电导率，使其能够用作高性能负极，具有高可逆容量、出色的倍率性能（例如，0.2 C时为1,138 mAh g(-1)，或60 C时为440 mAh g(-1)，质量负载为1 mg cm(-2)），以及优异的循环稳定性（例如，在2℃下循环500次，容量保持率>99%）。 C，质量负载为1 mg cm(-2) )。有趣的是，可以制造具有高面积容量和电流密度（例如，0.9 mA cm(-2) 时为 6.1 mA h cm(-2) ）的厚电极，为具有高能量和功率性能的锂离子电池提供一类有趣的材料。
The application of graphene for electrochemical energy storage has received tremendous attention; however, challenges remain in synthesis and other aspects. Here we report the synthesis of high-quality, nitrogen-doped, mesoporous graphene particles through chemical vapor deposition with magnesium-oxide particles as the catalyst and template. Such particles possess excellent structural and electrochemical stability, electronic and ionic conductivity, enabling their use as high-performance anodes with high reversible capacity, outstanding rate performance (e.g., 1,138 mA h g(-1) at 0.2 C or 440 mA h g(-1) at 60 C with a mass loading of 1 mg cm(-2) ), and excellent cycling stability (e.g., >99% capacity retention for 500 cycles at 2 C with a mass loading of 1 mg cm(-2) ). Interestingly, thick electrodes could be fabricated with high areal capacity and current density (e.g., 6.1 mA h cm(-2) at 0.9 mA cm(-2) ), providing an intriguing class of materials for lithium-ion batteries with high energy and power performance.