Synthetic melanin facilitates MnO supercapacitors with high specific capacitance and wide operation potential window
Synthetic melanin facilitates MnO supercapacitors with high specific capacitance and wide operation potential window
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合成黑色素有助于MnO超级电容器具有高比电容和宽工作电位窗口
DOI：
10.1016/j.polymer.2021.124276
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发表时间：
2021-10-28
期刊：
影响因子：
4.6
通讯作者：
Li, Yiwen
中科院分区：
文献类型：
--
作者：
Guo, Wancai;Guo, Xutong;Li, Yiwen
尽管人们对基于氧化锰（MnO）的混合电极材料进行了大量研究，但由于MnO在碳基体中不可避免的团聚和有限的稳定性，合理设计和简便制备高性能MnO混合超级电容器仍然充满挑战。在这项工作中，我们开发了一种直接一锅聚合法来合成一系列Mn离子掺杂的聚左旋多巴[P（L-DOPA）]合成黑色素纳米颗粒（Mn@SMNPs），以进一步转化为由许多稳定的Mn相关化学键（C-N-Mn）组成的小尺寸杂化碳纳米颗粒（MnO@CNPs，20-80 nm）。所获得的MnO@CNPs电极材料具有物理空间保护和MnO的良好分布，可以显示出高的比电容值（例如，545 F g（-1）在0.5 A g（-1）在6 M KOH电解质中）在1.3 V的宽工作电压内。这项工作将继续为制造下一代高性能合成黑色素基储能材料和器件提供灵感。
Although tremendous efforts have been devoted to manganous oxide (MnO)-based hybrid electrode materials, the rational design and facile preparation of high-performance MnO hybrid supercapacitors are still full of challenges, due to the inevitable agglomeration and limited stability of MnO within carbon matrixes. In this work, we developed a direct one-pot polymerization method to synthesize a series of Mn ion doped polylevodopa [P(L-DOPA)] synthetic melanin nanoparticles (Mn@SMNPs) for further transforming into small-sized hybrid carbon nanoparticles (MnO@CNPs, 20-80 nm) consisting of many stable Mn-related chemical bindings (C-N-Mn). The obtained MnO@CNPs electrode materials with physically spatial protection and well distribution of MnO could display high specific capacitance values (e.g., 545 F g(-1) at 0.5 A g(-1) in 6 M KOH electrolyte) within a wide operation voltage of 1.3 V. This work will continue to provide an inspiration towards the fabrication of the next-generation of high-performance synthetic melanin-based energy storage materials and devices.