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Molecular Ligand‐Mediated Assembly of Multicomponent Nanosheet Superlattices for Compact Capacitive Energy Storage
Author(s) -
Wu Guanhong,
Li Tongtao,
Wang Zhilei,
Li Mingzhong,
Wang Biwei,
Dong Angang
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202009086
Subject(s) - superlattice , materials science , nanosheet , supercapacitor , capacitance , graphene , nanotechnology , self assembly , nanoparticle , annealing (glass) , energy storage , oxide , chemical engineering , optoelectronics , composite material , chemistry , electrode , physics , power (physics) , quantum mechanics , engineering , metallurgy
Inspired by the self‐assembly of nanoparticle superlattices, we report a general method that exploits long‐chain molecular ligands to induce ordered assembly of colloidal nanosheets (NSs), resulting in 2D laminate superlattices with high packing density. Co‐assembly of two types of NSs further enables 2D/2D heterostructured superlattices. As a proof of concept, co‐assembly of Ti 3 C 2 T x and graphene oxide (GO) NSs followed by thermal annealing leads to MXene‐rGO superlattices with tunable microstructures, which exhibit significantly higher capacitance than their filtrated counterparts, delivering an ultrahigh volumetric capacitance of 1443 F cm −3 at 2 mV s −1 . Moreover, the as‐fabricated binder‐free symmetric supercapacitors show a high volumetric energy density of 42.1 Wh L −1 , which is among the best reported for MXene‐based materials in aqueous electrolytes. This work paves the way toward rational design of 2D material‐based superstructures for energy applications.