TY - JOUR
T1 - Porous nitrogen-doped reduced graphene oxide composite films for efficient electromagnetic shielding
AU - Gao, Tong
AU - Zhao, Hui
AU - Kong, Jie
AU - Zhuang, Qiang
AU - Liu, Xiaochen
AU - Lv, Yuelin
AU - Ou, Ye
AU - Chen, Lixin
N1 - Publisher Copyright:
© 2025
PY - 2025/8
Y1 - 2025/8
N2 - Graphene films are regarded as the next-generation electromagnetic interference (EMI) shielding material. However, the limited internal loss mechanisms in graphene films constrain their EMI shielding performance. In this work, porous nitrogen-doped reduced graphene oxide (porous N-rGO) composite films are prepared by vacuum filtration and a high-temperature annealing process using GO and micron-sized ZIF-8 particles as N source and template. After annealing, micron-sized ZIF-8 simultaneously introduces N heteroatoms into the efficient conductive network of rGO and creates a multi-level pore structure, which synergistically improves the shielding performance of composite films. The EMI shielding effectiveness of porous N-rGO composite film reaches 45.6 dB (48 μm) in the X-band, with an absolute shielding effectiveness of 35500.7 dB/cm2·g. Additionally, the porous N-rGO composite film with PDMS coating exhibits excellent flexibility and long-term durability. This flexible, high-performance EMI shielding composite film demonstrates great application potential in wearable electronic devices and aerospace fields.
AB - Graphene films are regarded as the next-generation electromagnetic interference (EMI) shielding material. However, the limited internal loss mechanisms in graphene films constrain their EMI shielding performance. In this work, porous nitrogen-doped reduced graphene oxide (porous N-rGO) composite films are prepared by vacuum filtration and a high-temperature annealing process using GO and micron-sized ZIF-8 particles as N source and template. After annealing, micron-sized ZIF-8 simultaneously introduces N heteroatoms into the efficient conductive network of rGO and creates a multi-level pore structure, which synergistically improves the shielding performance of composite films. The EMI shielding effectiveness of porous N-rGO composite film reaches 45.6 dB (48 μm) in the X-band, with an absolute shielding effectiveness of 35500.7 dB/cm2·g. Additionally, the porous N-rGO composite film with PDMS coating exhibits excellent flexibility and long-term durability. This flexible, high-performance EMI shielding composite film demonstrates great application potential in wearable electronic devices and aerospace fields.
KW - Electromagnetic interference shielding
KW - Harsh conditions
KW - Multi-level pore structure
KW - N-doped conductive network
UR - http://www.scopus.com/inward/record.url?scp=105002741199&partnerID=8YFLogxK
U2 - 10.1016/j.compositesa.2025.108942
DO - 10.1016/j.compositesa.2025.108942
M3 - 文章
AN - SCOPUS:105002741199
SN - 1359-835X
VL - 195
JO - Composites Part A: Applied Science and Manufacturing
JF - Composites Part A: Applied Science and Manufacturing
M1 - 108942
ER -