Synthesis and characterization of hierarchical Bi2MoO6/Polyaniline nanocomposite for all-solid-state asymmetric supercapacitor
Synthesis and characterization of hierarchical Bi2MoO6/Polyaniline nanocomposite for all-solid-state asymmetric supercapacitor
复制标题
全固态非对称超级电容器分级Bi2MoO6/聚苯胺纳米复合材料的合成与表征
DOI：
10.1016/j.electacta.2017.05.165
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发表时间：
2017-08
影响因子：
6.6
通讯作者：
Ge Cunwang
中科院分区：
文献类型：
--
作者：
Wu Fangsheng;Wang Xiaohong;Zheng Wanru;Gao Haiwen;Hao Chen;Ge Cunwang
以木质素磺酸钠(SLS)为掺杂剂，通过简单的化学聚合，将Bi2MoO6与聚苯胺(PANI)层复合，制备出比容量和倍率性能均有提高的Bi2MoO6/聚苯胺(PANI)杂化纳米复合材料。与纯Bi2MoO6相比，Bi2MoO6/PANI(BMP)纳米复合材料具有较大的反应表面积、良好的结构稳定性、大量的活性中心、良好的应变调节以及快速的电子和离子传输，这些都有利于提高其电化学性能。因此，添加0.15g Bi2MoO6(BMP-2)的Bi2MoO6/PANI电极在1A/−1电流密度下的比电容为826F/−1，以5A/−1的电流密度循环3000次后的比容保持率为75.5%，高于纯Bi2MoO6和其他电极。此外，由BMP-2电极和活性碳(AC)制成的全固态非对称超级电容器具有高的比电容(90.0F g−1)和高的能量密度(31.9WH kg−1)。此外，BMP-2//AC非对称超级电容器具有很高的循环稳定性，连续6 000次循环后仍保持86.5%的初始容量。因此，这些结果将促进Bi2MoO6/PANI纳米复合材料作为一种有效的超级电容器电极材料的潜在应用。
Bi2MoO6/Polyaniline (PANI) hybrid nanocomposite with enhanced specific capacity and rate performance was synthesized by compositing Bi2MoO6with the PANI layer using sodium lignosulphonate (SLS) as a dopant through a simple chemical polymerization. The Bi2MoO6/PANI (BMP) nanocomposite affords a large reaction surface area, an excellent structural stability, a large number of active sites, good strain accommodation, and fast electron and ion transportation compared with pure Bi2MoO6, which all are beneficial for improving the electrochemical performance. Hence, the Bi2MoO6/PANI electrode with 0.15 g Bi2MoO6(BMP-2) shows a high specific capacitance of 826 F g−1at a current density of 1 A g−1and capacitance retention of 75.5% after 3000 cycles at a current density of 5 A g−1, which is higher than pristine Bi2MoO6and other electrodes. In addition, an all-solid-state asymmetric supercapacitor (ASC) fabricated by the BMP-2 electrode and activated carbon (AC) displays a high specific capacitance of 90.0 F g−1and a high energy density of 31.9 Wh kg−1. Moreover, the BMP-2//AC ASC device exhibits high cycle stability, and 86.5% of its initial capacitance is retained after continuous 6000 cycles. Therefore, these results will promote a promising potential application of the Bi2MoO6/PANI nanocomposite for use as an effective electrode material in supercapacitors.
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