Bio-template fabrication of nitrogen-doped Li3V2(PO4)3/carbon composites from cattail fibers and their high-rate performance in lithium-ion batteries
Bio-template fabrication of nitrogen-doped Li3V2(PO4)3/carbon composites from cattail fibers and their high-rate performance in lithium-ion batteries
复制标题
香蒲纤维生物模板制备氮掺杂Li3V2(PO4)(3)/碳复合材料及其在锂离子电池中的高倍率性能
DOI：
10.1016/j.jallcom.2018.12.135
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发表时间：
2019-04-25
影响因子：
6.2
通讯作者：
Chen, Han
中科院分区：
文献类型：
--
作者：
Chen, Yueqian;Xiang, Kaixiong;Chen, Han
这是第一次报道使用从丰富的，绿色和经济的生物质废物获得的原始前体：香蒲纤维。以香蒲纤维为生物模板，采用溶液浸渍法制备了具有丰富导电网络结构的氮掺杂Li 3V 2（PO 4）（3）/C复合材料。利用X射线衍射仪和扫描电镜对氮掺杂Li 3V 2（PO 4）（3）/C复合材料的形貌和微观结构进行了表征。通过三次溶液浸渍获得氮掺杂的Li 3V 2（PO 4）（3）/碳复合材料（样品C-3），其用薄的多孔Li 3V 2（PO 4）（3）层完全覆盖碳纤维。这些有序的氮掺杂的Li 3V 2（PO 4）（3/）碳（C-3）是有序互连的多孔Li 3V 2（PO 4）（3）纳米连接。发现这种新型结构具有在N掺杂的碳纤维和多孔Li 3V 2（PO 4）（3）纳米连接之间形成的交错导电网络。然而，使用真空中的浸渍工艺获得的Li 3V 2（PO 4）（3）/碳复合材料（称为样品（C-V））显示出棒状Li 3V 2（PO 4）（3）/碳复合材料的随机堆积。样品C-3在3.0和4.3V之间在15 C下500次循环后表现出113.2mAh g（-1）的最高可逆容量，但在这些相同条件下，样品C-V的剩余可逆容量仅为82.3mAh g（-1）。(C)2018 Elsevier B. V.版权所有。
This is the first report of the use of an original precursor obtained from an abundant, green and economical bio-mass waste: cattail fibers. Nitrogen-doped Li3V2(PO4)(3)/carbon composites with copious conductive networks have been successfully synthesized using cattail fibers as a bio-template employing facile, repeated solution immersions. The morphologies and microstructure of the nitrogen-doped Li3V2(PO4)(3)/carbon composites were characterized using an X-ray diffractometer and scanning electron microscopy. A nitrogen-doped Li3V2(PO4)(3)/carbon composite (sample C-3) was obtained through three times solution immersion, which completely covered the carbon fibers with thin, porous layers of Li3V2(PO4)(3). These orderly nitrogen-doped Li3V2(PO4)(3/)carbon (C-3) were orderly interconnected porous Li3V2(PO4)(3) nanoconnections. This novel structure was found to have interlaced conductive networks that were formed between the N-doped carbon fibers and porous Li3V2(PO4)(3) nanoconnections. However, the Li3V2(PO4)(3)/carbon composites, termed sample (C-V), obtained using the immersion process in a vacuum, displayed a random accumulation of rod-like Li3V2(PO4)(3)/carbon composites. Sample C-3 exhibited the highest reversible capacity of 113.2 mAh g(-1) after 500 cycles at 15 C between 3.0 and 4.3 V, but at under these same conditions, the remaining reversible capacity of sample C-V was only 82.3 mAh g(-1). (C) 2018 Elsevier B.V. All rights reserved.