A novel synthesis of hierarchical porous carbons from interpenetrating polymer networks for high performance supercapacitor electrodes
A novel synthesis of hierarchical porous carbons from interpenetrating polymer networks for high performance supercapacitor electrodes
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DOI：
10.1016/j.carbon.2016.10.016
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发表时间：
2017
期刊：
影响因子：
10.9
通讯作者：
Dongmei Sun
中科院分区：
文献类型：
--
作者：
Dong Luo;Lihua Gan;Mingxian Liu;Dongmei Sun
报道了一种从互穿聚合物网络（IPN）合成分层多孔碳（HPC）用于先进超级电容器电极的新策略。间苯二酚/甲醛(R/F)甲阶酚醛树脂和酒石酸锌之间存在氢键相互作用，将它们引入到聚丙烯酸钠(PAAS)的空隙中形成IPNs。通过 IPN 的直接碳化制备了具有泡沫状大孔、均匀介孔（~3.8 nm）和丰富微孔的 HPC。大孔来自PAAS的热解，均匀的介孔归因于PAAS和酒石酸锌的协同作用，而IPNs和酒石酸锌的分解以及碳热还原过程产生丰富的微孔。所得的 HPC 具有高达 1371 m2g−1 的高比表面积，作为超级电容器电极，在 1.0 A g−1 时表现出 283 F g−1 的高比电容。此外，该电极还表现出高倍率性能，可用于充电/放电操作的高电流密度为 20 A g−1 (182 F g−1)。此外，HPC-1.5 电极在 2.0 A g−1 电流下循环 10000 次后表现出优异的电化学稳定性，保留率为 95.86%。这一发现凸显了从 IPN 中衍生出结构良好的多孔碳来实现先进超级电容器器件的新机会。
A novel strategy for the synthesis of hierarchical porous carbons (HPCs) from interpenetrating polymer networks (IPNs) for advanced supercapacitor electrodes was reported. There is hydrogen-bonding interaction between resorcinol/formaldehyde (R/F) resol and zinc tartrate, and they were introduced into the inter space of sodium polyacrylate (PAAS) to form IPNs. HPCs with foam-like macropores, uniform mesopores (∼3.8 nm), and abundant micropores were fabricated by direct carbonization of the IPNs. The macropores come from the pyrolysis of PAAS, and the uniform mesopores are ascribed to the synergistic effect of PAAS and zinc tartrate, while the decomposition of IPNs and zinc tartrate and the carbothermal reduction process generate abundant micropores. The resultant HPCs with a high specific surface area up to 1371 m2g−1as a supercapacitor electrode exhibit a high specific capacitance of 283 F g−1at 1.0 A g−1. Besides, the electrode shows high rate capability in which a high current density of 20 A g−1for charge/discharge operation is available (182 F g−1). Moreover, HPC-1.5 electrode shows excellent electrochemical stability up to 10000 cycles at 2.0 A g−1with 95.86% retention. This finding highlights new opportunities for well-structured porous carbons derived from IPNs to achieve advanced supercapacitor devices.
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