High-capacitance MXene anode based on Zn-ion pre-intercalation strategy for degradable micro Zn-ion hybrid supercapacitors

A comprehensive overview of MXene‐based anode materials for univalent metal ions (Li+, Na+, and K+) and bivalent zinc ion capacitor application

“…Moreover, pre‐intercalation strategy to improve the storage property of MXene has been noticed in the previous discussions of univalent MICs. Recently, Mao et al [190] . reported a degradable micro ZIC by coupling Ti 3 C 2 T x MXene/ZnCl 2 anode and MnO 2 ‐MWCNTs cathode.…”

“…[188,189] Moreover, pre-intercalation strategy to improve the storage property of MXene has been noticed in the previous discussions of univalent MICs. Recently, Maoet al [190] reported a degradable micro ZIC by coupling Ti 3 C 2 T x MXene/ ZnCl 2 anode and MnO 2 -MWCNTs cathode. The pre-intercalation of Zn 2 + into the MXene layers via osmotic pressure and simultaneous replacement of the surface attached À F terminals (partly) by the À Cl are found to expand the interlayer spacing as well as electronic conductivity of the anode material.…”

“…based storage systems have shown profound interest due to the surplus availability, low cost, and involvement of two/three electrons in the redox process. But studies on the multivalent MICs, except ZICs, are very rare and need to be explored. Some progress has been made to achieve flexible MICs device, [164,183,186,187,190] , but the overall performance is not as good as required for realistic application. Therefore, significant efforts should be paid to design flexible, self‐healable, stretchable, compressible, and biodegradable MICs device by employing advanced techniques such as inkjet/3D/screen printing and laser cutting.…”

Thin carbon nanotube coiled around thick branched carbon nanotube composite electrodes for high-performance and flexible supercapacitors

“…It has been reported that microporous carbons with pore sizes smaller than 2 nm are not fully electrochemically accessible, which decreased the rate performance of microporous carbon. [20][21][22] On the other hand, a high capacitance can be achieved in carbon materials with higher mesoporous surface area compared to microporous surface area. [23][24][25][26] It is still a great challenge to obtain carbon nanomaterials with a hierarchical porous structure for FSC applications.…”

MXene: Nanoengineering and Application as Electrode Materials for Supercapacitors

“…Talapin 课题组 [40] 在熔融无机盐中通过取代和消除反 应来制备和去除表面端基，合成了具有 O、NH、S、 Cl、Se、Br 和 Te 表面端基的 MXene，以及无端基的 MXene。Gao 课题组 [41] [42] 引入其他端接基团，调 节表面端基类型以提高 MXene 的电化学性能。Li 课 题组 [43] 采用碘辅助蚀刻路线(图 2(a))制备无氟且富 氧端基的 MXene，在 1 mV• s −1 扫速下的比电容(293 [43] Fig. 2 Preparation method and electrochemical performance of iodine-containing terminated MXene [43] (a) Preparing strategy by Lewis-acid melt etching; (b) CV curves of I-Ti3C2…”