TY - JOUR
T1 - Si@Ti3C2Tx with Si nanoparticles embedded in a 3D conductive network of crumpled Ti3C2Tx nanosheets for the anode of lithium-ion batteries with enhanced cycling performance
AU - Wang, Zhiwen
AU - Cao, Dong
AU - Ren, Mingxi
AU - Zhang, Hanning
AU - Pan, Limei
AU - John Zhang, Chuanfang
AU - Yang, Jian
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2022/2/5
Y1 - 2022/2/5
N2 - Silicon-based materials are considered the most promising anode materials for lithium-ion batteries (LIBs). However, due to the huge volume effect of Si powder during charging and discharging, the pulverization and peeling of silicon nanoparticles results in a certain amount of active material loss, which significantly affects the stability and coulombic efficiency of the battery. In this paper, a simple suspension mixing-freeze drying process was used to prepare a Si@Ti3C2Tx composite with a fluffy and porous structure, in which Si nanoparticles (SiNPs) are wrapped in a 3D conductive network of wrinkled and curled Ti3C2Tx nanosheets. Thus, both Si nanoparticle agglomeration and restacking of Ti3C2Tx nanosheets are inhibited, electrolyte penetration and charge transfer are facilitated, and Si nanoparticle volume expansion is effectively buffered. When used as an LIB anode, after 500 cycles and at a density of 1 A g−1, a high specific capacity of 1729 mAh g−1 and coulombic efficiency of ≥ 98.5% were achieved for Si@Ti3C2Tx, showing excellent electrochemical performance.
AB - Silicon-based materials are considered the most promising anode materials for lithium-ion batteries (LIBs). However, due to the huge volume effect of Si powder during charging and discharging, the pulverization and peeling of silicon nanoparticles results in a certain amount of active material loss, which significantly affects the stability and coulombic efficiency of the battery. In this paper, a simple suspension mixing-freeze drying process was used to prepare a Si@Ti3C2Tx composite with a fluffy and porous structure, in which Si nanoparticles (SiNPs) are wrapped in a 3D conductive network of wrinkled and curled Ti3C2Tx nanosheets. Thus, both Si nanoparticle agglomeration and restacking of Ti3C2Tx nanosheets are inhibited, electrolyte penetration and charge transfer are facilitated, and Si nanoparticle volume expansion is effectively buffered. When used as an LIB anode, after 500 cycles and at a density of 1 A g−1, a high specific capacity of 1729 mAh g−1 and coulombic efficiency of ≥ 98.5% were achieved for Si@Ti3C2Tx, showing excellent electrochemical performance.
KW - Anode
KW - Fluffy
KW - Lithium-ion battery
KW - MXene
KW - Silicon
UR - http://www.scopus.com/inward/record.url?scp=85116258121&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2021.162037
DO - 10.1016/j.jallcom.2021.162037
M3 - 文章
AN - SCOPUS:85116258121
SN - 0925-8388
VL - 892
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
M1 - 162037
ER -