Electrosynthesis of a hyperbranched dendrimeric porphyrin polymer: optical and electronic characterization as a material for bifunctional electrochromic supercapacitors,Sustainable Energy & Fuels

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Electrosynthesis of a hyperbranched dendrimeric porphyrin polymer: optical and electronic characterization as a material for bifunctional electrochromic supercapacitors
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2020-10-07 , DOI: 10.1039/d0se00199f
Javier E. Durantini _{1,

2,

3,

4} , Raul Rubio _{1,

2,

3,

4} , Claudia Solis _{1,

2,

3,

4} , Lorena Macor _{1,

2,

3,

4} , Gustavo M. Morales _{1,

2,

3,

4} , María I. Mangione _{4,

5,

6,

7,

8} , Daniel A. Heredia _{2,

3,

4,

9} , Edgardo N. Durantini _{2,

3,

4,

9} , Luis Otero _{1,

2,

3,

4} , Miguel Gervaldo _{1,

2,

3,

4}

Affiliation

A Zn(II) porphyrin monomer modified by four fully π-conjugated side-branches holding eight carbazole residues produces a hyperbranched polymeric conducting film by electrochemical polymerization. The polymer possesses electronic properties that make the film suitable for application in energy storage devices as a supercapacitive material. This property is based on the pseudocapacitance generated by the reversible redox processes that can be induced in the organic polymeric film. The open dendrimeric structure allows the formation of a sponge-like tridimensional arrangement, with a large contact area between the liquid electrolyte and the film surface. The pseudocapacitive electrode material exhibits capacitances as high as 277 F g⁻¹ at a current density of 4.5 A g⁻¹, and presents a specific capacitance retention of 70% at 54.5 A g⁻¹. This high capacitance retention demonstrates that the organic polymer could be used as a material for energy storage applications where a high discharge–recharge rate is needed. Also, the electrochromic behavior of the porphyrin polymer may be used in transparent devices where charge discharge processes are followed by color changes.

中文翻译：

超支化树枝状卟啉聚合物的电合成：光学和电子表征，作为双功能电致变色超级电容器的材料

用四个具有八个咔唑残基的完全π-共轭的侧枝改性的Zn（II）卟啉单体通过电化学聚合产生超支化聚合物导电膜。该聚合物具有电子特性，使该膜适合作为超级电容材料应用于能量存储设备。该性质基于由可逆氧化还原过程产生的伪电容，该伪电容可在有机聚合物膜中诱发。开放的树枝状结构允许形成海绵状的三维排列，在液体电解质和膜表面之间具有大的接触面积。假电容电极材料在4.5 A g ^-1的电流密度下表现出高达277 F g ^-1的电容，在54.5 A g ^-1时呈现70％的比电容保持率。如此高的电容保持率表明，有机聚合物可以用作需要高放电速率的储能材料。而且，卟啉聚合物的电致变色行为可以用在透明装置中，其中电荷放电过程之后会发生颜色变化。

更新日期：2020-11-03

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