用于锂离子电池的氮掺杂石墨烯框架的优越阴极性能。
Superior Cathode Performance of Nitrogen-Doped Graphene Frameworks for Lithium Ion Batteries.
机构信息
Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences , Beijing 100083, China.
Center for Advanced Energy Materials and Devices, Xi'an University of Technology , Xi'an 710048, China.
出版信息
ACS Appl Mater Interfaces. 2017 Mar 29;9(12):10643-10651. doi: 10.1021/acsami.6b15872. Epub 2017 Mar 14.
Development of alternative cathode materials is of highly desirable for sustainable and cost-efficient lithium-ion batteries (LIBs) in energy storage fields. In this study, for the first time, we report tunable nitrogen-doped graphene with active functional groups for cathode utilization of LIBs. When employed as cathode materials, the functionalized graphene frameworks with a nitrogen content of 9.26 at% retain a reversible capacity of 344 mAh g after 200 cycles at a current density of 50 mA g. More surprisingly, when conducted at a high current density of 1 A g, this cathode delivers a high reversible capacity of 146 mAh g after 1000 cycles. Our current research demonstrates the effective significance of nitrogen doping on enhancing cathode performance of functionalized graphene for LIBs.
对于储能领域的可持续和低成本锂离子电池（LIBs）而言，开发替代阴极材料是非常理想的。在这项研究中，我们首次报告了具有活性官能团的可调氮掺杂石墨烯，可用于 LIBs 的阴极应用。当用作阴极材料时，氮含量为 9.26at%的功能化石墨烯框架在 50mA/g 的电流密度下循环 200 次后仍保持 344mAh/g 的可逆容量。更令人惊讶的是，当在 1A/g 的高电流密度下进行时，这种阴极在 1000 次循环后仍能提供 146mAh/g 的高可逆容量。我们目前的研究表明，氮掺杂对提高 LIBs 功能化石墨烯阴极性能具有重要意义。
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