Abstract This study provides a general process for the synthesis of carbon paper (CP) supported core-shell MnCo2O4@NiCo2O4 nanoarrays structure through two-step solvothermal method. The as-synthesized hierarchical MnCo2O4@NiCo2O4/CP is further used as counter electrode (CE) based on Titanium mesh of dye-sensitized solar cells (DSSCs) and exhibits an excellent electrochemical property with a high photoelectric conversion efficiency of 9.58%. The excellent electrochemical performance can be ascribed to the contribution from carbon paper combination outer-sphere NiCo2O4 nanosheet and inner-sphere MnCo2O4 nanoneedle arrays and the use of titanium mesh, which offer a large specific surface area, abundant electronic transmission channels and small internal impedance. The present work can be helpful to develop low-cost and effective CE materials in DSSCs and other applications.

中文翻译：

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在碳纸上原位生长MnCo2O4@NiCo2O4层状核壳丛状阵列，用于染料敏化太阳能电池的高效对电极材料

摘要 本研究为通过两步溶剂热法合成碳纸（CP）负载的核壳型MnCo2O4@NiCo2O4纳米阵列结构提供了通用方法。合成的分级 MnCo2O4@NiCo2O4/CP 进一步用作基于钛网的染料敏化太阳能电池 (DSSC) 的对电极 (CE)，并表现出优异的电化学性能，光电转换效率高达 9.58%。优异的电化学性能可归因于碳纸组合外球NiCo2O4纳米片和内球MnCo2O4纳米针阵列以及钛网的使用，其具有较大的比表面积、丰富的电子传输通道和较小的内阻抗。