Reduced graphene oxide/Mn3O4 nanohybrid for high-rate pseduocapacitive electrodes
Reduced graphene oxide/Mn3O4 nanohybrid for high-rate pseduocapacitive electrodes
复制标题
用于高倍率赝电容电极的还原氧化石墨烯/Mn3O4纳米杂化物
DOI：
10.1016/j.jcis.2017.10.031
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发表时间：
2017
影响因子：
9.9
通讯作者：
Limei Duan
中科院分区：
文献类型：
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作者：
Limei Duan
纳米结构Mn 3 O 4由于其低成本、环境相容性和固有的高容量而成为一种有前途的赝电容电极材料。然而，低导电性和低可及活性位点限制了其性能。我们报道了一维（1D）纳米尺度的Mn 3 O 4与还原氧化石墨烯（RGO）的耦合制备RGO/Mn 3 O 4纳米杂化材料。（MORGO）作为具有高电容的赝电容电极材料。氧化石墨烯（GO）在Mn 3 O 4/氧化石墨烯（MOGO）体系中选择性还原为还原氧化石墨烯（RGO），同时保持锰的氧化态不变是制备MOGO的关键。比表面积比纯Mn 3 O 4高14倍，电荷转移电阻降低3.2倍。MORGO.is这些增强的性质导致在0.1A.g1的电流密度下538 F g1的优异的比电容，和472 F g1在10 A g1在1 M Na 2SO 4水电解质。在2000次循环后，电容保持89%，证明了其优异的长期循环稳定性
anostructure Mn3O4 is a promising pseudocapacitive electrode material due to its low cost, environmental compatibility, and intrinsically high capacity. However, the poor electrical conductivity and.low accessible active sites limit its performance. We report that one-dimensional (1D) nanoscale.Mn3O4 has been coupled with reduced graphene oxide (RGO) to fabricate RGO/Mn3O4 nanohybrid.(MORGO) as a pseudocapacitive electrode material with high capacitance. The selective reduction of graphene oxide (GO) in Mn3O4/graphene oxide (MOGO) to reduced graphene oxide (RGO) while sustaining.the unchanged oxidation state of manganese is the key to obtain MORGO. Specific surface area of MORGO.is 14 times higher than pure Mn3O4, and the charge transfer resistance decreases 3.2 times. These.enhanced properties lead to excellent specific capacitance of 538 F g1 at the current density of 0.1 A.g1., and of 472 F g1 at 10 A g1 in 1 M Na2SO4 aqueous electrolyte. The capacitance retained 89% after.2000 cycles, demonstrating its excellent long-term cycling stability