Chemical interaction with carbon has been employed to establish electron conduction pathways through intimate contact with anode materials. It is highly plausible that the strong chemical interaction can change the crystallinity as well as bonding nature of anode materials. This highlights the importance of chemical interaction with carbon and its effects on the material and electrochemical properties of anode materials. However, this is not yet investigated. This study is the first report on the amorphization of layered structured GeSe induced by the chemical interaction and its implications on the electrochemical properties for K-ion batteries. The charge storage mechanism of GeSe/CNT composite, investigated using ex-situ X-ray diffraction, indicates that reversible conversion-alloying reaction of GeSe is realized by the amorphization, which is closely linked with weakening of Ge–Se bonds derived from the strong chemical interaction and a concomitant increase in K-ion diffusion. As a result, the GeSe/CNT composite exhibits excellent electrochemical properties. Similar amorphization driven by chemical interaction is also observed for other layered structured anode materials. This study provides new insights on the chemical interaction of layered anode materials with carbon. Our findings could effectively be used to realize reversible conversion reaction for other anode materials for advanced secondary batteries.

与碳的化学相互作用已被用于通过与阳极材料的密切接触来建立电子传导途径。强烈的化学相互作用可以改变阳极材料的结晶度和键合性质，这是非常合理的。这突出了与碳的化学相互作用及其对阳极材料的材料和电化学性能的影响的重要性。然而，这尚未调查。这项研究是关于化学相互作用引起的层状结构 GeSe 非晶化及其对 K 离子电池电化学性能的影响的第一份报告。GeSe/CNT 复合材料的电荷存储机制，使用非原位研究X 射线衍射表明 GeSe 的可逆转化合金化反应是通过非晶化实现的，这与强化学相互作用导致的 Ge-Se 键的减弱和 K 离子扩散的伴随增加密切相关。因此，GeSe/CNT 复合材料表现出优异的电化学性能。对于其他层状结构阳极材料，也观察到由​​化学相互作用驱动的类似非晶化。这项研究为层状阳极材料与碳的化学相互作用提供了新的见解。我们的发现可以有效地用于实现先进二次电池其他负极材料的可逆转化反应。