Dalian Institute of Chemical Physics,Chinese Academy of Sciences
Welcome Campus Map Contact 中文
Home About Research People International Opportunities Facilities MyDICP
Location: Home >> News & Events >> News
Low-cost Hydrocarbon Membrane Enables Commercial-scale Flow Batteries for Long-duration Energy Storage
  English.dicp.cas.cn    Posted:2022-03-28    From:DNL17

Flow batteries are promising for energy storage due to their high safety, high reliability, long cycle life, and high efficiency.

The development of commercial-scale flow batteries for long-duration energy storage requires to reduce the cost of flow batteries, especially the cost of ion-exchange membranes.

Recently, a research group led by Prof. LI Xianfeng from the Dalian Institute of Chemical Physics (DICP) of the Chinese Academy of Sciences (CAS) realized pilot-scale synthesis and roll-to-roll manufacturing of hydrocarbon membranes with high-performance in alkaline-based flow batteries.

This work was published in Joule on March 21.

The hydrocarbon membranes for alkaline-based flow batteries with high performance (Image by YUAN Zhizhang)

The researchers realized the kilogram-level synthesis of sulfonated poly(ether-ether-ketone) (SPEEK) polymer and demonstrated the pilot-scale roll-to-roll synthesis of SPEEK membrane and their applications in alkaline-based flow batteries.

They found that the rigid skeleton and dispersive cation exchange groups enabled the high stability of the membrane in alkaline media, and could confine O-containing species (H2O, OH-, etc.) inside the membrane, resulting in the formation of continuous hydrogen-bonding networks. This favoured the dissociation of H+ in H–O–H (H2O) and transfer from H2O to adjacent OH- ions through a Grotthuss mechanism, thus providing a high OH- conductivity in SPEEK.

The membrane was integrated in alkaline zinc-iron flow battery stack with power up to 4 kW, with a high energy efficiency of 85.5% operated at 80 mA/cm2.

This work was supported by the National Natural Science Foundation of China, CAS Engineering Laboratory for Electrochemical Energy Storage, and the Youth Innovation Promotion Association of CAS. (Text by YUAN Zhizhang)

DALIAN INSTITUTE OF CHEMICAL PHYSICS, CHINESE ACADEMY OF SCIENCES

Welcome
Opportunities
Education

Campus Map
Contact

中文

Dalian Institute of
Chemical Physics, CAS
457 Zhongshan Road
Dalian, China 116023

Copyright 1999-2020. Dalian Institute of Chemical Physics, Chinese Academy of Sciences. All rights reserved.