Meticulous design and morphological tuning at nano/micrometer have been the focal point to modulate and comprehensively understand the kinetics of electrochemical reactions, especially in lithium-ion batteries (LIBs). In this report, we demonstrate an elegant approach to fabricate spinel-cobalt oxide (Co₃O₄) with sheet, pellet, flower, and cube-like morphologies. When evaluated as anode materials in LIBs, the Co₃O₄ nanomaterials with 2D sheet-morphology demonstrates the best electrochemical performance compared to those of Co₃O₄ materials with pellets-, flowers- and cube-like morphologies. Galvanostatic charge/discharge study of Co₃O₄ nanomaterials with 2D sheet-morphology shows an initial discharge capacity of 1618.0 mAh g⁻¹ and a discharge capacity of 587.0 mAh g⁻¹ is achieved even after 60 cycles at 0.1 C rate with an impressive columbic efficiency of ∼99%. Importantly, the sheet-structured Co₃O₄ electrode delivers a discharge capacity of 444.0 mAh g⁻¹ at a high current of 1.0 C and provides 275.0 mAh g⁻¹ even after 400 cycles with ∼99.0% columbic efficiency suggesting high electrode stability. The enhanced electrochemical performance of Co₃O₄ nanomaterials with 2D sheet-morphology is attributed to improved electrode/electrode interface with nano-sized particles and better accommodation of strain during charge/discharge processes compared to other morphologies.

纳米/微米的精细设计和形态调整一直是调制和全面理解电化学反应动力学的重点，特别是在锂离子电池（LIB）中。在本报告中，我们演示了一种制备具有片状，粒状，花朵状和立方体状形态的尖晶石-氧化钴（Co ₃ O ₄）的优雅方法。当评估为LIB中的阳极材料时，具有二维片状形态的Co ₃ O ₄纳米材料与具有颗粒状，花朵状和立方体状形态的Co ₃ O ₄材料相比，表现出最佳的电化学性能。Co ₃ O _4的恒电流充放电研究具有二维片状形态的纳米材料显示出初始放电容量为1618.0 mAh g ^-1，即使在0.1 C速率下循环60次后，其放电容量也为587.0 mAh g ^-1，其哥伦布效率约为99％。重要的是，片状结构的Co ₃ O ₄电极在1.0 C的高电流下的放电容量为444.0 mAh g ^-1，即使在400次循环后仍能提供275.0 mAh g ^-1，具有约99.0％的钴效率，这表明电极稳定性高。Co ₃ O ₄的增强电化学性能 具有二维薄片形态的纳米材料归因于与其他形态相比，改善了与纳米级颗粒的电极/电极界面，并在充电/放电过程中更好地适应了应变。