Bending Resistance Covalent Organic Framework Superlattice:“Nano‑Hourglass”‑Induced Charge Accumulation for Flexible In‑Plane Micro‑Supercapacitors  

作　　者：Xiaoyang Xu Zhenni Zhang Rui Xiong Guandan Lu Jia Zhang Wang Ning Shuozhen Hu Qingliang Feng Shanlin Qiao 

机构地区：[1]College of Chemistry and Pharmaceutical Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,People’s Republic of China [2]State Key Laboratory of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,People’s Republic of China [3]School of Chemistry and Chemical Engineering,Northwestern Polytechnical University,Xi’an 710072,People’s Republic of China [4]Hebei Electronic Organic Chemicals Engineering Center,Shijiazhuang 050018,People’s Republic of China

出　　处：《Nano-Micro Letters》2023年第2期198-211,共14页纳微快报（英文版）

基　　金：the National Natural Science Foundation of China(No.22105058,52272163);Hebei(China)Natural Science Foundation(Grant No.B2021208014,B2021208073);Key R&D Program of Hebei(Grant No.20311501D,216Z1201G);Key Research and Development Program of Shaanxi Province(2021GY-217).

摘　　要：Covalent organic framework(COF)film with highly exposed active sites is considered as the promising flexible selfsupported electrode for in-plane microsupercapacitor(MSC).Superlattice configuration assembled alternately by different nanofilms based on van der Waals force can integrate the advantages of each isolated layer to exhibit unexpected performances as MSC film electrodes,which may be a novel option to ensure energy output.Herein,a mesoporous free-standing A-COF nanofilm(pore size is 3.9 nm,averaged thickness is 4.1 nm)with imine bond linkage and a microporous B-COF nanofilm(pore size is 1.5 nm,averaged thickness is 9.3 nm)withβ-keto-enamine-linkages are prepared,and for the first time,we assembly the two lattice matching films into sandwich-type superlattices via layer-by-layer transfer,in which ABA–COF superlattice stacking into a“nano-hourglass”steric configuration that can accelerate the dynamic charge transportation/accumulation and promote the sufficient redox reactions to energy storage.The fabricated flexible MSC–ABA–COF exhibits the highest intrinsic CV of 927.9 F cm^(−3) at 10 mV s^(−1) than reported two-dimensional alloy,graphite-like carbon and undoped COF-based MSC devices so far,and shows a bending-resistant energy density of 63.2 mWh cm^(−3) even after high-angle and repeat arbitrary bending from 0 to 180°.This work provides a feasible way to meet the demand for future miniaturization and wearable electronics.

关 键 词：In-plane micro-supercapacitor Covalent organic framework Free-standing nanofilm SUPERLATTICE Bending resistance 

分 类 号：TM53[电气工程—电器] TB33[一般工业技术—材料科学与工程]