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Flexible supercapacitors based on mesoporous nanocrystalline cobalt ammonium phosphates and bacterial cellulose composite electrode
International Journal of Energy Research ( IF 4.3 ) Pub Date : 2020-09-17 , DOI: 10.1002/er.6001 Likkhasit Wannasen 1, 2 , Ekaphan Swatsitang 1, 2 , Supree Pinitsoontorn 1, 2
International Journal of Energy Research ( IF 4.3 ) Pub Date : 2020-09-17 , DOI: 10.1002/er.6001 Likkhasit Wannasen 1, 2 , Ekaphan Swatsitang 1, 2 , Supree Pinitsoontorn 1, 2
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A flexible electrode of NH4CoPO4 · H2O composite bacterial cellulose (Co‐BC) has been successfully prepared via a hydrothermal method. A bacterial cellulose (BC) membrane was used as a host matrix for nanocrystalline (NC) NH4CoPO4 · H2O. The preparation process included anchoring nanocrystalline NH4CoPO4 · H2O on BC nanofibers with an intrinsic 3D network structure. X‐ray diffraction (XRD) results indicated the orthorhombic structure of the NH4CoPO4 · H2O NC within the Pmn21 space group and BC of a Type‐I structure. FE‐SEM images revealed microplate‐like NH4CoPO4 · H2O structures on BC nanofibers. The a three‐electrode system of all samples were studied for their electrochemical properties by CV, charge/discharge and EIS estimations in a 3 M KOH electrolyte. A maximal specific area capacitance of 158.5 mF cm−2 (43.3 F g−1) was obtained at a current density of 0.25 mA cm−2 using a Co‐BC90 electrode. Moreover, this sample show an excellent capacitance retention of 99% after a 3000 cycle at 1 mA cm−2 current density.
中文翻译：
基于介孔纳米晶磷酸钴钴铵和细菌纤维素复合电极的柔性超级电容器
NH 4 CoPO 4 ·H 2 O复合细菌纤维素（Co-BC）的柔性电极已通过水热法成功制备。细菌纤维素（BC）膜用作纳米晶体（NC）NH 4 CoPO 4 ·H 2 O的基质。制备过程包括将纳米晶体NH 4 CoPO 4 ·H 2 O锚定在具有固有3D网络结构的BC纳米纤维上。 。X射线衍射（XRD）结果表明Pmn 2 1内NH 4 CoPO 4 ·H 2 O NC的正交结构I型结构的空间群和BC。FE‐SEM图像显示了BC纳米纤维上的微板状NH 4 CoPO 4 ·H 2 O结构。通过在3 M KOH电解质中的CV，充电/放电和EIS估计，研究了所有样品的三电极系统的电化学性能。使用Co-BC90电极在0.25 mA cm -2的电流密度下可获得158.5 mF cm -2（43.3 F g -1）的最大比电容。而且，该样品在1mA cm -2的电流密度下经过3000次循环后显示出99％的优异的电容保持率。
更新日期：2020-09-17
中文翻译：
基于介孔纳米晶磷酸钴钴铵和细菌纤维素复合电极的柔性超级电容器
NH 4 CoPO 4 ·H 2 O复合细菌纤维素（Co-BC）的柔性电极已通过水热法成功制备。细菌纤维素（BC）膜用作纳米晶体（NC）NH 4 CoPO 4 ·H 2 O的基质。制备过程包括将纳米晶体NH 4 CoPO 4 ·H 2 O锚定在具有固有3D网络结构的BC纳米纤维上。 。X射线衍射（XRD）结果表明Pmn 2 1内NH 4 CoPO 4 ·H 2 O NC的正交结构I型结构的空间群和BC。FE‐SEM图像显示了BC纳米纤维上的微板状NH 4 CoPO 4 ·H 2 O结构。通过在3 M KOH电解质中的CV，充电/放电和EIS估计，研究了所有样品的三电极系统的电化学性能。使用Co-BC90电极在0.25 mA cm -2的电流密度下可获得158.5 mF cm -2（43.3 F g -1）的最大比电容。而且，该样品在1mA cm -2的电流密度下经过3000次循环后显示出99％的优异的电容保持率。
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