Permeability and selectivity synergistically enhanced nanofluidic membrane for osmotic energy harvesting
Jundong Zhong,
Tingting Xu,
Hongyan Qi,
Weibo Sun,
Shuang Zhao,
Zhe Zhao,
Yirong Sun,
Youliang Zhu,
Jianxin Mu,
Haibo Zhang,
Xuanbo Zhu,
Zhenhua Jiang,
Lei Jiang
Affiliations
Jundong Zhong
National and Local Joint Engineering Laboratory for Synthetic Technology of High‐Performance Polymer Jilin University Changchun Jilin China
Tingting Xu
National and Local Joint Engineering Laboratory for Synthetic Technology of High‐Performance Polymer Jilin University Changchun Jilin China
Hongyan Qi
National and Local Joint Engineering Laboratory for Synthetic Technology of High‐Performance Polymer Jilin University Changchun Jilin China
Weibo Sun
National and Local Joint Engineering Laboratory for Synthetic Technology of High‐Performance Polymer Jilin University Changchun Jilin China
Shuang Zhao
National and Local Joint Engineering Laboratory for Synthetic Technology of High‐Performance Polymer Jilin University Changchun Jilin China
Zhe Zhao
National and Local Joint Engineering Laboratory for Synthetic Technology of High‐Performance Polymer Jilin University Changchun Jilin China
Yirong Sun
National and Local Joint Engineering Laboratory for Synthetic Technology of High‐Performance Polymer Jilin University Changchun Jilin China
Youliang Zhu
State Key Laboratory of Supramolecular Structure and Materials Jilin University Changchun Jilin China
Jianxin Mu
National and Local Joint Engineering Laboratory for Synthetic Technology of High‐Performance Polymer Jilin University Changchun Jilin China
Haibo Zhang
National and Local Joint Engineering Laboratory for Synthetic Technology of High‐Performance Polymer Jilin University Changchun Jilin China
Xuanbo Zhu
National and Local Joint Engineering Laboratory for Synthetic Technology of High‐Performance Polymer Jilin University Changchun Jilin China
Zhenhua Jiang
National and Local Joint Engineering Laboratory for Synthetic Technology of High‐Performance Polymer Jilin University Changchun Jilin China
Lei Jiang
CAS Key Laboratory of Bio‐inspired Materials and Interfacial Science Technical Institute of Physics and Chemistry, Chinese Academy of Sciences Beijing China
Abstract For the porous‐membrane‐based osmotic energy generator, the potential synergistic enhancement mechanism of various key parameters is still controversial, especially because optimizing the trade‐off between permeability and selectivity is still a challenge. Here, to construct a permeability and selectivity synergistically enhanced osmotic energy generator, the two‐dimensional porous membranes with tunable charge density are prepared by inserting sulfonated polyether sulfone into graphene oxide. Influences of charge density and pore size on the ion transport are explored, and the ionic behaviors in the channel are calculated by numerical simulations. The mechanism of ion transport in the process is studied in depth, and the fundamental principles of energy conversion are revealed. The results demonstrate that charge density and pore size should be matched to construct the optimal ion channel. This collaborative enhancement strategy of permeability and selectivity has significantly improved the output power in osmotic energy generation; compared to the pure graphene oxide membrane, the composite membrane presents almost 20 times improvement.
