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Updated: Jul 17, 2025

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

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Published on: August 16, 2018

Two-Dimensional MFI-Type Zeolite Flow Battery Membranes.

Dezhu Zhang^1,2, Kang Huang^1,2, Yongsheng Xia¹

¹State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, No. 30 Puzhu South Road, Nanjing, 211816, China.

Angewandte Chemie (International Ed. in English)

|September 6, 2023

Summary

A novel 2D MFI-type zeolite membrane significantly enhances vanadium flow battery (VFB) performance. This advanced membrane offers superior vanadium resistance and proton conductivity, leading to extended self-discharge times and stable cycling for reliable energy storage.

Keywords:

Flow Batteries Two-Dimensional Membranes ZSM-5 Zeolite Nanosheets

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Last Updated: Jul 17, 2025

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Published on: February 23, 2017

Area of Science:

Materials Science
Electrochemistry
Energy Storage

Background:

Vanadium flow batteries (VFBs) are crucial for stationary energy storage.
High-performance VFBs require membranes with excellent vanadium resistance and proton conductivity.
Current membranes face limitations in efficiency and longevity.

Purpose of the Study:

To fabricate and evaluate a novel two-dimensional (2D) MFI-type zeolite membrane for VFBs.
To assess the membrane's vanadium resistance, proton conductivity, and electrochemical performance.
To compare the VFB performance with the new membrane against commercial standards.

Main Methods:

Fabrication of a 2D MFI-type zeolite membrane using zeolite nanosheet modules.
Measurement of vanadium resistance and proton conductivity.
Evaluation of VFB performance metrics including coulombic efficiency, voltage efficiency, and energy efficiency at various current densities.
Long-term cycling stability tests and self-discharge analysis.

Main Results:

The 2D MFI-type zeolite membrane exhibited high vanadium resistance (0.07 mmol L⁻¹ h⁻¹) and proton conductivity (0.16 S cm⁻¹).
Achieved high coulombic (93.9%), voltage (87.6%), and energy (82.3%) efficiencies at 40 mA cm⁻².
Significantly extended self-discharge period to 116.2 h compared to 45.9 h for commercial membranes.
Demonstrated stable performance over 1000 cycles (>1500 h) at 80 mA cm⁻².

Conclusions:

The developed 2D MFI-type zeolite membrane is a highly promising candidate for advanced VFBs.
Its superior ion-conductive properties enhance battery efficiency and longevity.
This membrane technology advances the development of reliable stationary electrochemical energy-storage devices.