Three-dimensional polymer-derived ceramic/graphene paper as a Li-ion battery and supercapacitor electrode
Three-dimensional polymer-derived ceramic/graphene paper as a Li-ion battery and supercapacitor electrode
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DOI：
10.1039/c6ra08244k
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发表时间：
2016-06
期刊：
影响因子：
3.9
通讯作者：
L. David;K. M. Shareef;M. Abass;Gurpreet Singh
中科院分区：
文献类型：
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作者：
L. David;K. M. Shareef;M. Abass;Gurpreet Singh
研究了分子筛衍生陶瓷（PDC）/碳纳米管嵌入石墨烯自支撑复合材料的制备及其作为锂离子电池和超级电容器电极的电化学性能。使用PDC-氧化石墨烯（GO）分散体的真空过滤，然后在500 ° C下热还原来制备复合纸。作为锂离子电池电极测试，复合纸提供高达300 mA h g-1的可逆容量（相对于电极的总质量归一化），在1000次充电/放电循环后容量损失可忽略不计。硼掺杂的碳氮化硅（Si（B）CN）在倍率性能、循环稳定性和库仑效率方面优于其未掺杂的对应物（SiCN）。在分析的PDC材料中，Si（B）CN-CNT-rGO在5 A g-1的电流密度下表现出最低的欧姆电阻和最高的比电容，约为269.52 F g-1，使其成为用于电化学能量存储应用的有前景的电极材料。
We study the synthesis and electrochemical performance of molecular precursor-derived ceramic (PDC)/carbon nanotube-embedded graphene self-supporting composite papers as Li-ion battery and supercapacitor electrodes. The composite papers are prepared using vacuum filtration of PDC-graphene oxide (GO) dispersion, followed by thermal reduction at 500 °C. Tested as a Li-ion battery electrode, the composite papers deliver a reversible capacity as high as 300 mA h g−1 (normalized with respect to total mass of the electrode) with negligible capacity loss after 1000 charge/discharge cycles. Boron-doped silicon carbon nitride (Si(B)CN) outperforms its undoped counterpart (SiCN) in terms of rate capability, cyclic stability, and coulombic efficiency. Among the PDC materials analyzed, Si(B)CN–CNT–rGO demonstrates the lowest ohmic resistance and highest specific capacitance of approximately 269.52 F g−1 at a current density of 5 A g−1, making it a promising electrode material for electrochemical energy storage applications.