Transition metal oxide-based anodes are an attractive candidate for high performance next-generation batteries due to their high theoretical capacity. However, their practical applications toward high energy density are limited due to the inactive materials in the electrode and large volume expansion during Li insertion and extraction processes. Here, we report a one-pot formation method of cryptomelane manganese oxide nanowires-based freestanding anode for Li-ion storage. The freestanding electrodes are completed simply by vacuum drying a controlled in-situ hydrogel thin film with no additional process, achieving flexible devices without a binder. The porous electrode structure via such a one-pot synthesis makes it capable of multidimensional Li-ion accessibility and volume change suppression. As a result, the mechanically flexible anode delivers the reversible capacity of about 525 mAh g⁻¹ after 400th cycles at 1.0 A g⁻¹. This study opens up the feasibility of one-pot synthesis in the design of various conversion-type electrodes to realize ultra-light, flexible energy storage devices.

由于其高理论容量，基于过渡金属氧化物的阳极是高性能下一代电池的有吸引力的候选者。然而，由于电极中的非活性材料和锂嵌入和脱嵌过程中的大体积膨胀，它们在高能量密度方面的实际应用受到限制。在这里，我们报告了一种用于锂离子存储的基于锂锰氧化物纳米线的锂离子电池的一锅法形成方法。独立式电极只需真空干燥受控原位水凝胶薄膜即可完成，无需额外工艺，实现无需粘合剂的柔性设备。多孔电极结构通过这种一锅合成使其能够实现多维锂离子可及性和体积变化抑制。结果，机械柔性阳极在1.0 A g ^{-1 的}第400次循环后提供约525 mAh g ^-1的可逆容量。该研究开辟了在设计各种转换型电极以实现超轻、柔性储能装置方面的一锅法合成的可行性。