JOURNAL OF POWER SOURCES
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2017
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IF 6.395
Lesi Zhang,Ling Ling,Min Xiao,Dongmei Han,Shuanjin Wang,Yuezhong Meng
A novel self-assembled composite membrane , Nafion-[PDDA/ZrP] n with nacre-like nanostructures was successfully fabricated by a layer-by-layer (LbL) method and used as proton exchange membrane for vanadium redox flow battery applications. Poly(diallyldimethylammonium chloride) (PDDA) with positive charges and zirconium phosphate (ZrP) nanosheets with negative charges can form ultra-thin nacre-like nanostructure on the surface of Nafion membrane via the ionic crosslinking of tightly folded macromolecules. The lamellar structure of ZrP nanosheets and Donnan exclusion effect of PDDA can greatly decrease the vanadium ion permeability and improve the selectivity of proton conductivity . The fabricated Nafion-[PDDA/ZrP] 4 membrane shows two orders of magnitude lower vanadium ion permeability (1.05 × 10 −6 cm 2 min −1 ) and 12 times higher ion selectivity than those of pristine Nafion membrane at room temperature. Consequently, the performance of vanadium redox flow batteries (VRFBs) assembled with Nafion-[PDDA/ZrP] 3 membrane achieved a highly coulombic efficiency (CE) and energy efficiency (EE) together with a very slow self-discharge rate. When comparing with pristine Nafion VRFB, the CE and EE values of Nafion-[PDDA/ZrP] 3 VRFB are 10% and 7% higher at 30 mA cm −2 , respectively.
研究领域:
材料科学
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能源技术
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2022
·
IF 10.53
Yu Xia,Yan Wang,Hongyan Cao,Shuhao Lin,Yongsheng Xia,Xiaoxuan Hou,Yulin Wu,Ying Yu,Kang Huang,Weihong Xing,Zhi Xu
Ion exchange membranes (IEMs) blending porous materials have shown great potential for the large-scale energy storage technologies, such as flow battery . However, it remains challenging to overcome the compatibility issue between polymer and porous fillers. In this work, the polymer of intrinsic microporosity (PIM) was successfully introduced into sulfonated polyether ether ketone with high degree of sulfonation (HDS-SPEEK) membrane. PIM exhibited desirable compatibility with HDS-SPEEK due to the natural polymer property . Meanwhile, the rigid skeleton structure of PIM effectively solved the problems of HDS-SPEEK involving poor mechanical property and low vanadium resistance. With increasing the doping of carboxyl grafting modified PIM, the tensile strength increased from 15.22 to 29.94 MPa and the vanadium permeability declined from 4.4 × 10 −6 to 1.6 × 10 −7 cm 2 min −1 . As a result, the vanadium flow battery equipped with the optimized blend membrane showed significantly enhanced coulombic efficiency from 55% to 99% at the current density of 20 mA cm −2 , and had good long-term stability. This work presents a new route to prepare high-performance IEMs based on porous PIM materials for flow battery.
研究领域:
材料科学
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能源存储技术
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产品关联
DOI
高影响因子
Batteries-Basel
·
2023
·Vol. 9
·期 2
·141
·
IF 4
Xiaorui Wang,Shuang Wang,Dan Liang,Yinghe Cui,Xiaodong Wang,Zhipeng Yong,Fengxiang Liu,Zhe Wang
Based on amino polybenzimidazoles with flexible hydrophilic side chains (AmPBI-MOE) and polymeric ionic liquid (PIL), a series of composite membranes (AmPBI-MOE-PIL-X) were fabricated for vanadium redox flow battery applications. Here, 1-Bromo-2-(2-methoxyethoxy)ethane was grafted onto amino polybenzimidazole (AmPBI) by the method of halogenated hydrocarbons, and PIL was synthesized from ionic liquids by in situ radical polymerization to build a hydrogen-bonded cross-linked network within the film. The hydrophilic side chain improves the proton conductivity. With the increase in ionic liquids, the vanadium transmittance and the proton conductivity increase. The AmPBI-MOE-PIL-5 membrane not only exhibits a vanadium ions permeability of 0.88 × 10−9cm2min−1, which is much lower than Nafion117 (6.07 × 10−8cm2min−1), but also shows a very excellent blocking ability for vanadium ion. The AmPBI-MOE-PIL-5 membrane shows excellent performances at 60 mA cm−2, with VE of 87.93% and EE of 82.87%, both higher than that of Nafion117 membrane in VRFB.
研究领域:
材料科学
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电化学工程
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2019
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IF 6.361
Xiao-Bing Yang,Lei Zhao,Xu-Lei Sui,Ling-Hui Meng,Zhen-Bo Wang
A novel composite vanadium-blocking proton exchange membrane for vanadium redox flow battery (VRB) was designed and constructed by immobilizing phosphotungstic acid (PWA) on Nano Kevlar Fibers (NKFs) via a solution-casting method. The proton/vanadium selectivity of the composite membrane is greatly improved by incorporating the complex formed by NKFs and PWA into the Nafion matrix. Simple tuning of the complex doping quantity results in different composite membranes with superior vanadium barrier properties (namely, a minimum vanadium permeability of 2.46 × 10 -7 cm 2 min −1 ). This coupled with proton conductivities reaching 0.061 S cm −1 at room temperature indicates a proton/vanadium selectivity of 2.48 × 10 5 S min cm −3 , which is 6.3 times higher than that of recast Nafion (0.34 × 10 5 S min cm −3 ). When tested in a VRB, the performance of the single cell assembled with the composite membrane greatly outperforms that with recast Nafion at current densities ranging from 40 to 100 mA cm −2 .
研究领域:
材料科学
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电化学
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能源技术
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 25
·15137-15144
·
IF 10.733
Lei Hu,Li Gao,Xiaoming Yan,Wenji Zheng,Yan Dai,Ce Hao,Xuemei Wu,Gaohong He
An advanced ion-selective membrane containing a dynamic hydroxyl-based 3D H-bond network is first proposed for improved efficiencies and stability in flow battery applications. The 3D H-bond network structure is constructed by the nanoscale aggregation of hydrophilic dense-hydroxyl side chains anchored to hydrophobic polybenzimidazole. This unique dynamic H-bond network creates proton transport highways as well as vanadium permeation barriers across the membrane, leading to an ultralow vanadium ion permeability (<10−9 cm2 s−1) and remarkably low area resistance (0.32 Ω cm−2). This membrane exhibits high coulombic efficiencies (CE: 98.0–99.2%) and energy efficiencies (EE: 88.9–77.9%) at high current densities (80–200 mA cm−2), together with a long lifetime of over 800 cycles (about 42 days) at 120 mA cm−2 in vanadium flow batteries. The design of dynamic 3D H-bond networks provides a promising strategy for the development of highly ion-selective and stable membranes for flow battery application.
研究领域:
材料科学
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电化学
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能源存储
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
·
IF 7.139
Jinchao Li,Jun Long,Wenheng Huang,Wenjie Xu,Jun Liu,Huan Luo,Yaping Zhang
A series of novel branched sulfonated polyimide (bSPI-x) membranes with 8% branched degree are developed for application in vanadium redox flow battery (VRFB). The sulfonation degrees of bSPI-x membranes are precisely regulated for obtaining excellent comprehensive performance. Among all bSPI-x membranes, the bSPI-50 membrane shows strong vanadium permeability resistance, which is as 8 times as that of commercial Nafion 212 membrane. At the same time, the bSPI-50 membrane has remarkable proton selectivity, which is four times as high as that of Nafion 212 membrane. The bSPI-50 membrane possesses slower self-discharge speed than Nafion 212 membrane. Furthermore, the bSPI-50 membrane achieves stable VRFB efficiencies during 200-time charge-discharge cycles at 120–180 mA cm −2 . Simultaneously, the bSPI-50 membrane exhibits excellent capacity retention compared with Nafion 212 membrane. All results imply that the bSPI-50 membrane possesses good application prospect as a promising alternative separator of VRFB.
研究领域:
材料科学
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电化学
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能源存储
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DOI
高影响因子
POLYMER
·
2011
·Vol. 52
·期 23
·5312-5319
·
IF 3.829
Dongyang Chen,Shuanjin Wang,Min Xiao,Dongmei Han,Yuezhong Meng
High-molecular-weight bulky-block poly(fluorenyl ether thioether ketone)s were successfully synthesized by a two steps one-pot protocol using N,N′ -dimethy- S -carbamate masked dithiols for vanadium redox flow battery (VRB) application. The followed sulfonation procedure gave birth to novel sulfonated block poly(fluorenyl ether thioether ketone)s (SPFETKs) with controlled ionic exchange capacities (IEC). Membranes with proton conductivities higher than (IEC > 1.66 mequiv. g −1 ) or comparable to (IEC < 1.66 mequiv. g −1 ) that of Nafion117 membrane were achieved. The VO 2+ permeabilities of SPFETKs membranes were much lower than that of Nafion117 membrane. The thermal properties, mechanical properties, oxidative stability , water uptake, proton conductivity, VO 2+ permeability and cell performance were investigated in detail.
研究领域:
高分子化学
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能源材料
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电化学
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膜科学与技术
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功能高分子
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Dan Liang,Shuang Wang,Wenjia Ma,Di Wang,Geng Liu,Fengxiang Liu,Yinghe Cui,Xiaodong Wang,Zhipeng Yong,Zhe Wang
A proton selective membrane based on a metal-organic framework (MOF) and polybenzimidazole (PBI) with a controllable sulfonation degree is designed for vanadium redox flow battery (VRFB) applications. The size of UiO-66 is between hydrated multivalent vanadium ions and stokes radius of protons, and its suitable pore size can obstruct the penetration of vanadium ions, resulting in a high vanadium resistance rate. Simultaneously, the imidazole groups and sulfonic acid groups in the sulfonated polybenzimidazole compose the acid-base pairs, which block the penetration of vanadium ions. Therefore, sulfonated PBI together with UiO-66 forms a denser network structure for as a vanadium ion barrier. Compare with the Nafion117 film, the vanadium transmittance of prepared composite film is lower (5.15 × 10 −7 cm 2 min −1 vs. 2.95 × 10 −9 cm 2 min −1 ). Compare with the Nafion117 membrane, VRFB with MOF polymer exhibits higher voltage efficiency (94.54%–74.93%) and energy efficiency (84.82%–73.98%) at 40-200 mA•cm −2 .
研究领域:
材料科学
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电化学
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能源存储
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Xiaorui Wang,Shuang Wang,Han Sun,Chenglong Li,Feng Pan,Tongtong Gao,Yu Luo,Xiaojuan Wang,Zhe Wang
A series of innovative branching OPBI composite membranes (OPBI-BTZ-PIL) were created based on benzotriazole side chain grafted OPBI (OPBI-BTZ) and double-bond ionic liquids for vanadium redox flow battery applications. The benzotriazole contained three nitrogen sites, which helped enhance the proton conductivity and low area resistance. The cation in the polymeric ionic liquid in the matrix and the vanadium ion produces the Donnan effect , which reduces vanadium permeability. Moreover, the hydrogen bond cross-linking network formed by the polymeric ionic liquid in the membrane further helps proton transport. The vanadium permeability of OPBI-BTZ 10 -PIL 10 is as low as 1.51 × 10 −9 cm 2 min −1 , which is one 40th of the Nafion117 (62.54 × 10 −9 cm 2 min −1 ). Its ion selectivity is up to 2.45 × 10 6 S min cm −3 . The OPBI-BTZ 10 -PIL 10 membrane performs well at 60 mA cm −2 , with CE of 94.12% and EE of 86.2%, both of which are higher than the Nafion117 membrane.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）