Influence of carbon structure on performance of electrode material for electric double-layer capacitor
Influence of carbon structure on performance of electrode material for electric double-layer capacitor
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DOI：
10.1016/j.jpcs.2007.07.086
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发表时间：
2008
影响因子：
4
通讯作者：
Yanshan Wang;Cheng-yang Wang;C. Guo;Zhi-qiang Shi
中科院分区：
文献类型：
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作者：
Yanshan Wang;Cheng-yang Wang;C. Guo;Zhi-qiang Shi
选择软化点相近的各向同性沥青和各向异性沥青作为活性碳(ISO和ANISO)的前驱体。在相同条件下进行了化学活化，讨论了前驱体的微观结构对活性碳性能的影响。微结构缺陷上非晶碳原子或边碳原子较多的各向同性沥青具有更强的反应能力，通过充分的化学活化可以形成更多的气孔。以这两种活性碳为电极材料，1M Et4NBF4/PC为电解液，制备了双电层电容器。其比电容(43.5Fg−1)高于非ISO(21.3Fg−1)，具有更好的功率性能和更低的电阻。
An isotropic pitch and an anisotropic pitch with similar softening point were chosen to be precursors for activated carbons (ISO and ANISO, respectively). Chemical activations with same conditions were carried out and the effects of microstructure of precursors on characteristics of activated carbons were discussed. Isotropic pitch with more noncrystallite carbon atoms or edge carbon atoms on the microstructural defects had more reactive ability and more pores were manufactured through sufficient chemical activation. Electric double-layer capacitors (EDLC) were made with the two activated carbons as electrode materials and 1M Et4NBF4/PC as the electrolyte. The performance of EDLC with the ISO has higher specific capacitance (43.5Fg−1) than the ANISO (21.3Fg−1) and has better power performance and lower resistance than the latter.