Preparation of bamboo carbon fiber and sandwich-like bamboo carbon fiber@SnO2@carbon composites and their potential application in structural lithium-ion battery anodes
Preparation of bamboo carbon fiber and sandwich-like bamboo carbon fiber@SnO2@carbon composites and their potential application in structural lithium-ion battery anodes
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竹碳纤维及三明治状竹碳纤维@SnO2@碳复合材料的制备及其在结构锂离子电池负极中的潜在应用
DOI：
10.1016/j.jallcom.2017.03.141
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发表时间：
2017-06-30
影响因子：
6.2
通讯作者：
Wang, Limin
中科院分区：
文献类型：
--
作者：
Han, Qigang;Yi, Zheng;Wang, Limin
PAN基碳纤维在结构锂离子电池(SLIB)中的研究显示出许多较好的结果和前景。然而，容量的限制亟待解决。为了弥补这一不足，成功地制备了一维仿生竹炭纤维(BCF)及其复合材料(BCF@SnO2@C)。在BCF@SnO2@C复合材料中，SnO2被夹在BCF模板和包覆的葡萄糖衍生碳之间，呈现三明治状结构。由于生物激发的BCF具有良好的导电性和缓冲效应，以及SnO2具有较高的理论比容量，所得到的BCF@SnO2@C复合材料有望作为传统锂离子电池和未来结构锂离子电池的负极材料。在627.1 mAg(-1)的电流密度下循环100次后，其可逆容量保持在100mAg(-1)，这比报道的SLIBs中碳纤维的增长高出5倍。即使在1000 mAg(-1)的高电流密度下，放电容量仍能达到409.1 mAHg(-1)。这些优异的容量性能可以迫切地解决目前SLIB使用商用碳纤维作为负极材料时容量有限的困扰问题。(C)2017爱思唯尔B.V.保留所有权利。
PAN-based carbon fibers have been studied in structural lithium-ion batteries (SLIBs), showing many better results and promises. However, the limitation in capacity is urgently solved. To remedy this shortage, one-dimensional (1D) bioinspired bamboo carbon fiber (BCF) and its composite (BCF@SnO2@C) are successfully fabricated. In the BCF@SnO2@C composite, the SnO2 is sandwiched between the BCF template and the coated glucose-derived carbon, showing sandwich-like structure. Due to the combined superiority of bioinspired BCF with good conductivity and buffer effect and the SnO2 with high theoretical specific capacity, the obtained BCF@SnO2@C composites are expected to use as an anode material for traditional lithium-ion batteries and future structural lithium-ion batteries. A high reversible capacity of 627.1 mAh g(-1) is maintained over 100 cycles at a current density of 100 mA g(-1), showing a huge increase five times as high as the reported carbon fibers in SLIBs. Even at a high current density of 1000 mA g(-1), the substantial discharge capacity can still reach 409.1 mAh g(-1). These excellent performances in capacity could urgently solve the obsessional issue, the limitation of capacity in current SLIBs when use commercial carbon fibers as anode materials. (C) 2017 Elsevier B.V. All rights reserved.