TY - JOUR
T1 - Construction of an MXene/Organic Superlattice for Flexible Thermoelectric Energy Conversion
AU - Wang, Zhiwen
AU - Zhang, Chuanrui
AU - Zhang, Jun
AU - Liang, Jia
AU - Liu, Zhenguo
AU - Hang, Fengling
AU - Xuan, Yuxue
AU - Wang, Xia
AU - Chen, Mengran
AU - Tang, Shaowen
AU - Zong, Peng An
N1 - Publisher Copyright:
© 2022 American Chemical Society.
PY - 2022/9/26
Y1 - 2022/9/26
N2 - Construction of an inorganic/organic superlattice-based film has been proven effective in enhancing thermoelectric (TE) performance as well as flexibility by a variety of mechanisms, typically for two-dimensional (2D) TiS2-based flexible TEs. MXenes, typically, Ti3C2Tx, are a type of 2D material widely investigated in fields of flexible batteries and electromagnetic shielding, among others. However, they have rarely been reported in flexible TEs. One of the key factors is that the surface termination groups (-T) on an MXene could trap electrons, restricting the electronic transport. Herein, -T groups were tailored and substituted by organic ions (-HA) by facile preannealing, exfoliation, and reassembly. The intercalation of -HA introduced Ti-N bonding, forming a flexible MXene/organic superlattice film. The electrical conductivity of the superlattice film was increased by 5 times to 1.6 × 105 S m-1 due to defect reduction as well as the electron injection effect. While the Seebeck coefficient was maintained, the power factor was increased from 4 to 18 μW m-1 K-2. The TE module based on the superlattice film revealed an output power of 7.6 nW at a temperature gap of 50 K. This work opens up an avenue of fabricating flexible MXene-based TE films by tailoring the surface termination group and constructing inorganic/organic superlattice structures.
AB - Construction of an inorganic/organic superlattice-based film has been proven effective in enhancing thermoelectric (TE) performance as well as flexibility by a variety of mechanisms, typically for two-dimensional (2D) TiS2-based flexible TEs. MXenes, typically, Ti3C2Tx, are a type of 2D material widely investigated in fields of flexible batteries and electromagnetic shielding, among others. However, they have rarely been reported in flexible TEs. One of the key factors is that the surface termination groups (-T) on an MXene could trap electrons, restricting the electronic transport. Herein, -T groups were tailored and substituted by organic ions (-HA) by facile preannealing, exfoliation, and reassembly. The intercalation of -HA introduced Ti-N bonding, forming a flexible MXene/organic superlattice film. The electrical conductivity of the superlattice film was increased by 5 times to 1.6 × 105 S m-1 due to defect reduction as well as the electron injection effect. While the Seebeck coefficient was maintained, the power factor was increased from 4 to 18 μW m-1 K-2. The TE module based on the superlattice film revealed an output power of 7.6 nW at a temperature gap of 50 K. This work opens up an avenue of fabricating flexible MXene-based TE films by tailoring the surface termination group and constructing inorganic/organic superlattice structures.
KW - MXene
KW - superlattice
KW - surface termination group
KW - thermoelectric
KW - two-dimensional materials
UR - http://www.scopus.com/inward/record.url?scp=85138801528&partnerID=8YFLogxK
U2 - 10.1021/acsaem.2c01855
DO - 10.1021/acsaem.2c01855
M3 - 文章
AN - SCOPUS:85138801528
SN - 2574-0962
VL - 5
SP - 11351
EP - 11361
JO - ACS Applied Energy Materials
JF - ACS Applied Energy Materials
IS - 9
ER -