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Phenothiazine–MXene Aqueous Asymmetric Pseudocapacitors
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-03-05 00:00:00 , DOI: 10.1021/acsaem.9b02404
Muhammad Boota 1 , Matthieu Bécuwe 2, 3, 4 , Yury Gogotsi 1
Affiliation  

We report here a molecular phenothiazine-based electrode as a high capacitance and long cycle life (77% retention after 80 000 cycles) pseudocapacitive organic material after hydrothermal deposition on reduced graphene oxide (rGO). Given the high stability of phenothiazine coated rGO hybrid electrodes under positive potentials, pseudocapacitive asymmetric supercapacitors were manufactured using two-dimensional titanium carbide (Ti3C2Tx) MXene as the negative electrode, which allowed expansion of the voltage window up to 1.4 V in 3 M H2SO4. The optimized asymmetric pseudocapacitors showed capacitance retention of over 80% after 30 000 cycles at 100 mV/s, which is one of the highest for aqueous asymmetric supercapacitors.

中文翻译:

吩噻嗪-MXene水不对称假电容器

我们在这里报告了一种基于分子吩噻嗪的电极,在还原石墨烯氧化物(rGO)上进行水热沉积后,具有较高的电容和长的循环寿命(80 000次循环后保留77%)。鉴于吩噻嗪涂覆的rGO混合电极在正电势下具有很高的稳定性,使用二维碳化钛(Ti 3 C 2 T x)MXene作为负电极制造了伪电容不对称超级电容器,从而允许电压范围扩展至1.4 V在3 MH 2 SO 4中。经过优化的非对称伪电容器在100 mV / s的3万次循环后显示出超过80%的电容保持率,这是水性非对称超级电容器最高的电容保持率之一。
更新日期:2020-03-05
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