Bacterial cellulose as source for activated nanosized carbon for electric double layer capacitors
Bacterial cellulose as source for activated nanosized carbon for electric double layer capacitors
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DOI：
10.1007/s10853-012-6754-y
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发表时间：
2013-01-01
影响因子：
4.5
通讯作者：
Bismarck, Alexander
中科院分区：
文献类型：
--
作者：
Lee, Koon-Yang;Qian, Hui;Bismarck, Alexander
以细菌纤维素（BC）为原料制备了纳米碳质材料。BC是由细菌产生的纳米材料，具有90%的高结晶度，在950摄氏度下热解并用CO2物理活化以产生纳米活性炭材料。BC的热解产生具有相对低的D-与G-带比率（在2.2与2.8之间）的碳质材料（碳产率在2%与20%之间），表明碳质材料具有石墨结构。两种不同的BC材料被热解-松散的纤维（冻干）和致密的纸形式。据观察，碳纳米纤维状材料是由松散的纤维形式的BC的热解产生的。在K2 SO 4溶液中的双电层（EDL）电容和面积归一化比电容分别高达42 F g（-1）和1，617 F cm（-2）。还将EDL电容与市售活性炭（YP-50 F）进行比较。
A nanosized carbonaceous material was derived from bacterial cellulose (BC). BC, which is produced by bacteria as nanosized material, possesses high degree of crystallinity of 90 %, was pyrolysed at 950 A degrees C and physically activated with CO2 to produce a nanosized activated carbon material. The pyrolysis of BC yielded a carbonaceous material (carbon yield of between 2 and 20 %) with a relatively low D- to G-band ratio (between 2.2 and 2.8), indicating that the carbonaceous material possesses a graphitic structure. Two different BC materials were pyrolysed-a loose fibrous (freeze-dried) and dense paper form. It was observed that a carbon nanofibre-like material was produced by the pyrolysis of the loose fibrous form of BC. The electric double layer (EDL) capacitance and the area-normalised specific capacitance in K2SO4 solution were as high as 42 F g(-1) and 1,617 F cm(-2), respectively. The EDL capacitance was also compared to commercially available activated carbon (YP-50F).