Premium
Self‐Assemble and In‐Situ Formation of Laponite RDS‐Decorated d‐Ti 3 C 2 T x Hybrids for Application in Lithium‐ion Battery
Author(s) -
He Yan,
Zhou Aiguo,
Liu Darong,
Hu Qianku,
Liu Xuqing,
Wang Libo
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201902650
Subject(s) - materials science , mxenes , electrochemistry , anode , lithium (medication) , nanocomposite , scanning electron microscope , chemical engineering , electrode , intercalation (chemistry) , transmission electron microscopy , current density , nanotechnology , composite material , inorganic chemistry , chemistry , medicine , physics , quantum mechanics , endocrinology , engineering
Two‐dimensional transition metal carbide materials called MXenes show potential application for energy storage. However, the lower capacity of MXene anodes limits their further application in lithium‐ion batteries. d‐Ti 3 C 2 T x with less layered structure by intercalation and delamination of acoustic degradation method in DMSO (dimethyl sulfoxide). This fabricated fewer sheets samples not only improve the electrical conductibility, specific area, but also reduce the ion diffusion resistance. Here we reported the facile synthesis of new laponite/d‐Ti 3 C 2 T x nanocomposites by the edge positive RDS nanosheets were assembled on negative MXene nanosheets through electrostatic interaction. Structure of laponite RDS/d‐Ti 3 C 2 T x nanocomposites was investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The characterization results show that the RDS nanosheets were intimately assembled on the d‐Ti 3 C 2 T x nanosheets. The electrochemical properties of the developed nanocomposite as anode materials of lithium‐ion batteries were characterized. Electrochemical tests indicate that the charge‐discharge result of laponite RDS/d‐Ti 3 C 2 T x can deliver an initial specific discharge capacity of 458 mAh⋅g −1 under a current density of 50 mA⋅g −1 . And a reversible discharge capacity of 160 mAh⋅g −1 at a current density of 1000 mA⋅g −1 , which was significantly higher than that of pure Ti 3 C 2 Tx, laponite RDS. The exceptional electrochemical performance of laponite/d‐Ti 3 C 2 T x electrode could be attributed to the improvement of electronic conductivity by d‐Ti 3 C 2 T x and laponite in the laponite/d‐Ti 3 C 2 T x composite.