Metal-organic cages improving microporosity in polymeric membrane for superior CO
<sub>2</sub>
capture
Mixed matrix membranes, with well-designed pore structure inside the polymeric matrix via the incorporation of inorganic components, offer a promising solution for addressing CO
2
emissions. Here, we synthesized a series of novel metal organic cages (MOCs) with aperture pore size precisely positioned between CO
2
and N
2
or CH
4
. These MOCs were uniformly dispersed in the polymers of intrinsic microporosity (PIM-1). Among them, the MOC-Ph cage effectively modulated chain packing and optimized the microporous structure of the membrane. Remarkably, the PIM-Ph-5% membrane shows superior performance, achieving an excellent CO
2
permeability of 8803.4 barrer and CO
2
/N
2
selectivity of 59.9, far exceeding the 2019 upper bound. This approach opens opportunities for improving the porous structure of polymeric membranes for CO
2
capture and other separation applications.
期刊:
Science Advances
2025
作者:
Jian Guan,Jingcheng Du,Qian Sun,Wen He,Ji Ma,Shabi Ui Hassan,Ji Wu,Hongjun Zhang,Sui Zhang,Jiangtao Liu
DOI:10.1126/sciadv.ads0583
Fullerene Intercalation of MXene Toward Super‐Long‐Cycle Sodium Ion Storage
Abstract2D layered MXene‐based materials are applied as cation‐intercalation electrode materials for sodium‐ion batteries (SIBs) due to their layered structures but suffer from spontaneous restacking during Na+ insertion and deintercalation processes, resulting in sluggish reaction kinetics and poor cycling stability. Herein, fullerene C60 is intercalated covalently into the interlayer of Ti3C2Tx MXene nanosheets by using a low‐temperature hydrothermal reaction between a water‐soluble C60 derivative and hydrophilic MXene nanosheets, resulting in enlarged interlayer spacing of MXene nanosheets from 12.8 to 14.1 Å and consequently retarded self‐restacking. Moreover, the strong electron extraction ability of C60 facilitates electron transfer from MXene to C60, enabling faster charge transport during Na+ transportation. The as‐prepared C60@MXene hybrid is applied as a novel anode of SIBs, exhibiting outstanding electrochemical performance and super‐long cycling stability. C60@MXene‐based SIB delivers a specific capacity of 226.8 mAh g−1 at 0.1 A g−1 after 300 cycles, which surpasses that obtained from the pristine MXene anode, and retains 94.5% capacity at 1 A g−1 after 10 000 cycles. DFT simulations confirm that C60‐induced enlarged interlayer spacing benefits Na+ migrations, which is responsible for improved electrochemical performance and cycling stability.
期刊:
Advanced Functional Materials
2024
作者:
Xing Wang,Yizhe Wang,Kun Ni,Jian Guan,Muqing Chen,Yanwu Zhu,Shangfeng Yang
DOI:10.1002/adfm.202400185
