Integrating polyacrylonitrile (PAN) nanoparticles with porous bacterial cellulose hydrogel to produce activated carbon electrodes for electric double-layer capacitors
Integrating polyacrylonitrile (PAN) nanoparticles with porous bacterial cellulose hydrogel to produce activated carbon electrodes for electric double-layer capacitors
复制标题
DOI：
10.1016/j.micromeso.2021.111209
复制
发表时间：
2021-06
影响因子：
5.2
通讯作者：
Kenta Chashiro;S. Iwasaki;Takahiro Hasegawa;J. Maruyama;Shohei Maruyama;Ananya Pal;Mahasweta Nandi;H. Uyama
中科院分区：
文献类型：
--
作者：
Kenta Chashiro;S. Iwasaki;Takahiro Hasegawa;J. Maruyama;Shohei Maruyama;Ananya Pal;Mahasweta Nandi;H. Uyama
以细菌纤维素（BC）和聚丙烯腈纳米粒子（PANnp）为原料，通过物理活化和化学活化分别制备了BC-PANnp-AC和BC-PANnp-KAC活性炭。商业上可获得的椰子已被用作BC的来源，而约100 nm的PAN纳米粒子已通过乳液聚合反应在BC凝胶中原位合成，该乳液聚合反应覆盖BC的纳米纤维。FE-SEM图像证实了BC在活性炭骨架中保留了分层层状结构。用活性炭设计的电极进行的详细的电化学研究表明，它们作为双电层电容器（EDLC）具有良好的性能，具有快速响应和高速充电和放电。与CO2活化法和市售的YP 50 F椰壳活性炭相比，KOH活化法制备的活性炭具有更高的比表面积和更好的电化学性能。BC特有的三维网络结构降低了这些复合材料中PAN纳米颗粒之间的晶界电阻，相比于单独的PAN纳米颗粒，其在不添加导电剂的情况下赋予良好的导电性。
Activated carbons,BC-PANnp-ACs andBC-PANnp-KACs, have been synthesized from a composite (BC-PANnp) derived from bacterial cellulose (BC) and polyacrylonitrile nanoparticles (PANnp) by physical and chemical activation, respectively. Commercially availablenata de cocohas been used as the source ofBCwhereas PAN nanoparticles ofca.100 nm have been synthesizedin situin theBCgel by emulsion polymerization which covers the nanofibers ofBC. FE-SEM images confirm that hierarchical lamellar structure ofBCis retained in the activated carbon frameworks. Detailed electrochemical studies carried out with the electrodes designed with the activated carbons reveal their good performance as electric double layer capacitors (EDLC) with fast response and high-speed charging and discharging. The activated carbons prepared by KOH activation have much higher specific surface area and exhibit better electrochemical properties compared to the carbon materials obtained by CO2activation or the commercially availableYP50Factivated carbon derived from coconut shell. The three-dimensional network structure peculiar toBCreduces the grain boundary resistance between the carbonized PAN nanoparticles in these composites compared to PAN nanoparticles carbonized alone imparting good conductivity without the addition of a conductive agent.