• Oxygen functional groups improve rate capability as well as long-term cycling stability of graphite oxide.

• The adsorption-intercalation hybrid K⁺ storage mechanism of graphite oxide (GO) is elucidated by in situ Raman spectroscopy and systematic electrochemical characterization.

• It is unraveled that the C = O and COOH rather than C-O-C and OH groups contribute to the formation of highly conductive, intact and robust solid electrolyte interphase.

中文翻译：

---

含氧官能团调节碳/电解质界面特性以增强 K+ 储存

• 氧官能团提高了氧化石墨的倍率性能和长期循环稳定性。

• 通过原位拉曼光谱和系统的电化学表征阐明了氧化石墨（GO）的吸附-插层混合K ^{+存储机制。}

• 揭示了 C = O 和 COOH 而不是 COC 和 OH 基团有助于形成高导电、完整和坚固的固体电解质界面。