Multifunctional and flexible micro-supercapacitors (MSCs) have attractive prospects in integrated micro electronic systems fields owing to its high power density, fast charge/discharge rates and small volume feature. Here, a flexible MSC functional electromagnetic interference (EMI) shielding is designed based on Mn ion-intercalated Ti₃C₂T_x MXene, presenting a high areal capacitance of 87 mF cm⁻² at 2 mV s⁻¹, remarkable energy density of 11.8 mWh cm⁻³ and outstanding shielding effectiveness of 44 dB. By density functional theory (DFT) calculation, the interaction between Mn ions and surface terminal (-F, –O, and –OH) of Ti₃C₂T_x is emphatically discussed, finding that the intercalated Mn ions are inclined to be bonding with O-contained groups with the orbital hybridization of Mn 3d and O 2p. It is intriguing to provide enhanced electrochemical performance in energy storage and additive interlayer EM waves absorption in EMI shielding. The present work can offer new insights about underlying mechanism of cation intercalation in Ti₃C₂T_x MXene and multiple functional devices application in integrated micro electronics systems field.

多功能且灵活的微型超级电容器（MSC）凭借其高功率密度，快速充电/放电速率和小体积特性，在集成微型电子系统领域中具有诱人的前景。在此，基于Mn离子嵌入的Ti ₃ C ₂ T _x MXene设计了柔性MSC功能电磁干扰（EMI）屏蔽，在2 mV s ^-1时具有87 mF cm ^-2的高面积电容，具有显着的能量密度。 11.8 mWh cm ^-3的出色屏蔽效果为44 dB。通过密度泛函理论（DFT）计算，Mn离子与Ti ₃ C ₂ T的表面末端（-F，-O和-OH）之间的相互作用着重讨论了_x，发现随着Mn 3d和O 2p的轨道杂化，插入的Mn离子倾向于与含O的基团键合。在能量存储中提供增强的电化学性能，并在EMI屏蔽中吸收附加的层间EM波，这一点很有趣。本工作可以提供有关Ti ₃ C ₂ T _x MXene中阳离子嵌入的潜在机理以及集成微电子系统领域中多功能器件应用的新见解。