Abstract Reduced graphene oxide (rGO) was prepared using oxalic acid in th e presence of montmorillonite (Mt) via hydrothermal treatment. The structure characterizations indicated that the porous structure of the obtained rGO and the residual oxygen groups were dominated by carbonyl and carboxyl groups. The mechanism analysis showed that the introduction of Mt. ensured the formation of isolated graphene oxide nanosheets free from being reduced by oxalic acid, further alleviating the irreversible restacking of rGO sheets. Electrochemical measurements demonstrated that the resultant rGO electrode offered a high specific capacitance (Cs) of 315 F/g at 1 A/g in a three-electrode configuration and the symmetric supercapacitor based on this electrode exhibited superior cycle stability with 89.7% capacitance retention after 10,000 cycles. This present work proposes a novel strategy for controlling the effects of oxalic acid on GO via employing multi-role Mt., also expands the preparation scope of graphene-based electrode materials.

中文翻译：

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蒙脱石作为制备还原氧化石墨烯的多功能试剂及其改进的超级电容性能

摘要 在蒙脱石 (Mt) 存在下，使用草酸通过水热处理制备还原氧化石墨烯 (rGO)。结构表征表明所得rGO的多孔结构和残留的氧基团以羰基和羧基为主。机理分析表明，Mt. 确保形成隔离的氧化石墨烯纳米片而不会被草酸还原，进一步减轻了 rGO 片的不可逆重新堆叠。电化学测量表明，所得 rGO 电极在三电极配置中在 1 A/g 下提供了 315 F/g 的高比电容（Cs），基于该电极的对称超级电容器表现出优异的循环稳定性，之后电容保持率为 89.7%。 10,000 次循环。