Hybrid Manufacturing of 3D Hierarchical Porous Carbons for Electrochemical Storage
Hybrid Manufacturing of 3D Hierarchical Porous Carbons for Electrochemical Storage
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DOI：
10.1002/admt.201901030
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发表时间：
2020-04
影响因子：
6.8
通讯作者：
Panfeng Wang;Hao Zhang;Huizhi Wang;Dawei Li;J. Xuan;Li Zhang
中科院分区：
文献类型：
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作者：
Panfeng Wang;Hao Zhang;Huizhi Wang;Dawei Li;J. Xuan;Li Zhang
碳是电化学储能领域最具吸引力的电极材料之一。理想的电极结构需要从纳米级到毫米级的孔分布，以同时实现有效的传质，扩大比表面积，并使电阻最小化。在这里，提出了一种新的混合方法来制造具有可设计的分级孔结构的碳电极。所提出的制造结合立体光刻、热解和化学活化，其分别有助于产生毫米、微米和纳米的孔。所制备的分级微结构材料的电流密度是商业碳纸的5倍。通过优化分级孔的分布可以实现电化学性能的进一步增强，这在钒氧化还原液流电池和超级电容器应用中被证明是可行的。
Carbon is one of the most attractive electrode materials for electrochemical energy storage. An ideal electrode structure requires a pore distribution ranging from nanoscale to milliscale to simultaneously enable efficient mass transfer, enlarge the specific surface area, and minimize the electrical resistance. Here, a novel hybrid method to fabricate carbon electrodes with a designable hierarchical pore structure is presented. The proposed manufacturing combines stereolithography, pyrolysis, and chemical activation, which contribute to producing pores in millimeter, micrometer, and nanometer, respectively. The prepared hierarchical microarchitectural material outperforms the commercial carbon paper by five times in current density. Further enhancement in the electrochemical performance can be achieved through optimizing the distribution of hierarchical pores, which is proved feasible in the applications of vanadium redox flow battery and supercapacitor applications.