PEDOT:PSS/MnO2/CNT Ternary Nanocomposite Anodes for Supercapacitive Energy Storage in Cyanobacterial Biophotovoltaics
PEDOT:PSS/MnO2/CNT Ternary Nanocomposite Anodes for Supercapacitive Energy Storage in Cyanobacterial Biophotovoltaics
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DOI：
10.1021/acsaem.0c02054
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发表时间：
2020-10-26
影响因子：
6.4
通讯作者：
Choi, Seokheun
中科院分区：
文献类型：
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作者：
Liu, Lin;Choi, Seokheun
集成到蓝藻生物光电转换器中的高性能超级电容阳极允许由生物光电转换器产生的能量被电容存储并通过显著的高功率突发传递。聚（3，4-乙撑二氧噻吩）聚苯乙烯磺酸盐，二氧化锰（MnO 2），和碳纳米管的三元纳米复合材料的设计提供了独特的和关键的功能，为开发一个完全光驱动的生物超级电容器或超级电容生物光伏器件。碳布上的纳米复合材料在1 M硫酸钠（Na 2SO 4）中表现出261 F/g的高比电容。即使在具有低离子电导率的BG-11蓝藻生长培养基中具有集胞藻属PCC 6803的厚生物膜，纳米复合物覆盖的布在照明下也显示出很大的生物电化学活性，产生105.2 www.example.com（-2）的面积电容和13.2 μ W h.cm（-2）的能量。mF.cm这种纳米复合材料集成在蓝藻生物光伏器件作为一个双功能的生物阳极，同时表现出光驱动的生物电催化和电荷存储功能。它通过充电和放电操作提供了生物光子学的巨大能量收集能力和内部超级电容器的深层电力储存。我们的混合系统在300 μ（-2）的放电电流密度下对于0.1 s脉冲产生162 μ（-2）的最大功率密度，这比未改性碳布上的生物光伏器件的最大功率密度大约100倍，比没有充电-放电操作的我们的生物光伏器件的最大功率密度大约6倍。A.cm W.cm所开发的超级电容生物光子学代表了革命性的技术突破，为无人值守的无线传感器网络提供了潜在可行的长期和强大的能源。
A high-performance supercapacitive anode integrated into cyanobacterial biophotovoltaics allows the energy produced by the biophotovoltaics to be capacitively stored and delivered through a significant high-power burst. A ternary nanocomposite of poly(3,4-ethylenedioxythiophene) polystyrene sulfonate, manganese dioxide (MnO2), and carbon nanotubes was designed to provide unique and critical functions for the development of a fully light-driven biosupercapacitor or a supercapacitive biophotovoltaic device. The nanocomposite on a carbon cloth exhibited a high specific capacitance of 261 F/g in 1 M sodium sulfate (Na2SO4). Even with a thick biofilm of Synechocystis sp. PCC6803 in a BG-11 cyanobacterial growth medium having a low-ionic conductivity, the nanocomposite-covered cloth showed great bioelectrochemical activity under illumination, producing an areal capacitance of 105.2 mF.cm(-2) and an energy of 13.2 mu W h.cm(-2). This nanocomposite integrated in a cyanobacterial biophotovoltaic device serves as a double-function bioanode concurrently exhibiting light-driven bioelectrocatalytic and charge-storage features. It offers the great energy-harvesting capability of biophotovoltaics and the deep power reservoir of an internal supercapacitor through charging and discharging operations. Our hybrid system produced a maximum power density of 162 mu W.cm(-2) for a 0.1 s pulse at a discharging current density of 300 mu A.cm(-2), which is about 100 times larger than that of the biophotovoltaic device on an unmodified carbon cloth and about 6 times greater than that of our biophotovoltaic device without the charging-discharging operation. The developed supercapacitive biophotovoltaics represent a revolutionary technological breakthrough that offers a potentially viable long-term and powerful energy source for unattended wireless sensor networks.