Abstract
In this work, Co3O4 layers can be constructed on copper foam (CF) in seconds via facile and efficient solution combustion processes, forming self-supporting Co3O4@CFs. By controlled immersion and calcination times, Co3O4@CF electrodes with different Co3O4 loadings are prepared and recorded as CF-1, CF-2, and CF-3, respectively. As anodes for lithium-ion batteries (LIBs), CF-1, CF-2, and CF-3 exhibit high-areal capacity of 0.87, 1.59, and 1.95 mAh/cm2 at 0.5 mA/cm2, respectively. The high capacity may be due to the high Co3O4 loadings and the hybrid (diffusion and pseudocapacitive) lithium storage behavior of the porous Co3O4 layer. This study provides an ultrafast solution combustion method for the construction of self-supporting anodes in LIBs, which can be further extended to prepare other self-supporting metal oxide-based electrodes for LIBs.
Published Version
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