硼酸辅助还原氧化石墨烯：钠离子电池的一种有前景的材料。
Boric Acid Assisted Reduction of Graphene Oxide: A Promising Material for Sodium-Ion Batteries.
机构信息
School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University , Xuzhou, Jiangsu 221116, China.
Institute for Superconducting and Electronic Materials, University of Wollongong , Wollongong, NSW 2522, Australia.
出版信息
ACS Appl Mater Interfaces. 2016 Jul 27;8(29):18860-6. doi: 10.1021/acsami.6b04774. Epub 2016 Jul 13.
Reduced graphene oxide, an intensively investigated material for Li-ion batteries, has shown mostly unsatisfactory performance in Na-ion batteries, since its d-spacing is believed to be too small for effective insertion/deinsertion of Na(+) ions. Herein, a facile method was developed to produce boron-functionalized reduced graphene oxide (BF-rGO), with an enlarged interlayer spacing and defect-rich structure, which effectively accommodates the sodiation/desodiation and provides more active sites. The Na/BF-rGO half cells exhibit unprecedented long cycling stability, with ∼89.4% capacity retained after 5000 cycles (0.002% capacity decay per cycle) at 1000 mA·g(-1) current density. High specific capacity (280 mAh·g(-1)) and great rate capability were also delivered in the Na/BF-rGO half cells.
还原氧化石墨烯（rGO）是一种备受关注的锂离子电池材料，但在钠离子电池中的性能却大多不尽人意，因为其层间距被认为太小，不利于钠离子的有效嵌入/脱出。在此，我们开发了一种简便的方法来制备硼功能化还原氧化石墨烯（BF-rGO），其层间距增大且具有丰富的缺陷结构，可有效容纳钠的嵌入/脱出，并提供更多的活性位点。Na/BF-rGO 半电池表现出前所未有的长循环稳定性，在 1000 mA·g(-1)电流密度下，经过 5000 次循环后（每循环容量衰减 0.002%），容量保持率约为 89.4%。Na/BF-rGO 半电池还具有高比容量（280 mAh·g(-1))和优异的倍率性能。
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