High capacitance B/C/N composites for capacitor electrodes synthesized by a simple method
High capacitance B/C/N composites for capacitor electrodes synthesized by a simple method
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DOI：
10.1016/j.jpowsour.2009.09.072
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发表时间：
2010-03-15
影响因子：
9.2
通讯作者：
Azumi, Kazuhisa
中科院分区：
文献类型：
--
作者：
Konno, Hidetaka;Ito, Teruhiko;Azumi, Kazuhisa
采用简单的方法制备了B/C/N复合材料。即将聚丙烯酰胺和硼酸的混合溶液干燥后得到的前驱体在HTT = 800-1200 ℃下碳化，随着热处理温度的升高，I lie复合材料中不溶性B物种的含量从4.8质量%线性增加到18.6质量%。XRD和FT-IR分析表明，乱层结构的H-BN在1000摄氏度左右开始形成，作为副产品。利用XPS堆肥中的B和N主要以B-N键为主。C-B-O型B。吡啶N.在总B或总N组分中，含h-BN的B-N键的四元N A分数随HTT的升高而增加，在900 ~ 1000 ℃之间超过50at%。这表明在HTT > 1000 ℃下形成的复合材料中，h-BN的量增加，导致其他B和N组分的减少。S（BET）在高达1000 ℃时几乎不变. 410-420 m（2）g（-1）。在1 mol dm（-3）H（2）SO（4）中，HTT形成的复合物在循环伏安图（CV）中出现了由多个反应引起的大而宽的氧化还原峰
The B/C/N composites were synthesized by a very simple method. that is, carbonization at HTT = 800-1200 degrees C of the precursor prepared by drying a solution mixture of polyacrylamide and boric acid, followed by boiling in water to remove borate by-products The amount of insoluble B species in I lie composite increased linearly from 4 8 to 18.6 mass% with raising HTT The XRD and FT-IR revealed that turbostratic h-BN started to form at around 1000 degrees C as a by-product. By XPS. major B and N components in I lie compost le were B-N bond. C-B-O type B. pyridinic N. pyrrolic N, and quaternary N A fraction for B-N bond including h-BN in the total B or N components increased with raising HTT and it exceeded 50 at % between 900 and 1000 C. It Was Suggested that in the composites formed at HTT > 1000 degrees C the amounts of h-BN increased, leading to reduction in other B and N components. The S(BET) was almost unchanged up to 1000 C. 410-420 m(2) g(-1). Large and broad redox peaks arisen from plural reactions appeared in the cyclic voltammogram (CV) measured in 1 mol dm(-3) H(2)SO(4) for the composites formed at HTT