Premium
Partially Etched Ti 3 AlC 2 as a Promising High‐Capacity Lithium‐Ion Battery Anode
Author(s) -
Chen Xifan,
Zhu Yuanzhi,
Zhu Xiaoquan,
Peng Wenchao,
Li Yang,
Zhang Guoliang,
Zhang Fengbao,
Fan Xiaobin
Publication year - 2018
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201801200
Subject(s) - mxenes , anode , materials science , hydrofluoric acid , lithium (medication) , etching (microfabrication) , nitride , gravimetric analysis , diffusion , carbide , chemical engineering , battery (electricity) , analytical chemistry (journal) , nanotechnology , layer (electronics) , composite material , metallurgy , chemistry , electrode , chromatography , medicine , power (physics) , physics , organic chemistry , quantum mechanics , endocrinology , engineering , thermodynamics
MXenes, a family of two‐dimensional transition‐metal carbide and nitride materials, are thought to be promising materials in energy storage because of their high electronic conductivity, hydrophilic surfaces, and low diffusion barriers. MXenes are generally prepared by removing the “A” elements (A=Al, Si, Sn, etc.) from their corresponding MAX phases by using hydrofluoric acid (HF) and other etching agents, although these “A” elements usually have great volumetric and gravimetric capacities. In a study of the etching progress of Ti 3 AlC 2 and evaluation of their anode performance in lithium‐ion batteries, a partially etched sample (0.5 h‐pe Ti 3 C 2 T x ) is found to have much higher capacity (160 mAh g −1 , 331.6 mAh cm −3 at 1C) when compared with the fully etched Ti 3 C 2 T x (110 mAh g −1 , 190.3 mAh cm −3 at 1C). Moreover, a 99 % capacity retention was observed even after 1000 cycles in the 0.5 h‐pe Ti 3 C 2 T x anode. This interesting result can be explained, at least in part, by the alloying of the residual Al during lithiation.