Ultra-small RuO2 nanoparticles supported on carbon cloth as a high-performance pseudocapacitive electrode,Advanced Composites and Hybrid Materials

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Ultra-small RuO2 nanoparticles supported on carbon cloth as a high-performance pseudocapacitive electrode
Advanced Composites and Hybrid Materials ( IF 23.2 ) Pub Date : 2022-03-25 , DOI: 10.1007/s42114-022-00452-z
Ruixiang Ge _{1,

2} , Liang Chen ₁

Affiliation

RuO₂ has been extensively investigated as a pseudocapacitive material. However, developing a facile and effective method to improve the pseudocapacitive performance of RuO₂ is still desired. In this work, we report the synthesis of ultra-small RuO₂ nanoparticles supported on carbon cloth (us-RuO₂/CC) via a facile two-step method. As a binder-free electrode, us-RuO₂/CC exhibits a high capacitance of 1067.4 F g⁻¹ at a current density of 1 A g⁻¹. Moreover, us-RuO₂/CC also shows good rate performance (87.8% capacitance retention at 20 A g⁻¹) and cycle stability (99.6% capacitance retention after 5000 cycles).

Graphical abstract

Ultra-small RuO₂ nanoparticles on carbon cloth (us-RuO₂/CC) were synthesized via annealing and acid etching treatment of a ZnRu precursor, which was prepared by a dip-coating process. Introducing Zn significantly reduces the particle size of RuO₂, leading to a high specific capacitance of 1067.4 F g⁻¹.

中文翻译：

碳布负载超小RuO2纳米粒子作为高性能赝电容电极

RuO ₂作为赝电容材料已被广泛研究。然而，仍然需要开发一种简便有效的方法来提高RuO _{2的赝电容性能。}在这项工作中，我们报告了通过简单的两步法合成了碳布负载的超小 RuO _{2纳米颗粒（us-RuO}_{2 /CC）。}作为无粘合剂电极，us-RuO _{2 /CC 在1 A g}^-1的电流密度下表现出1067.4 F g ^-1的高电容。此外，us-RuO ₂ /CC 还表现出良好的倍率性能（20 A g ^-1时的电容保持率为 87.8% ）和循环稳定性（5000 次循环后的电容保持率为 99.6%）。