CHEMISTRY OF MATERIALS
·
2024
·
IF 7.2
Bo Hu,Qing Fang,Bailing Liu,Jianxin Ma,Qingbo An,Hong-Ying Zang,Yang-Guang Li,Haiming Xie,Zhong-Min Su
Proton-conducting materials serving as key components in various electrochemical and energy conversion devices have attracted a great deal of attention. The creation of superior proton-conducting materials in a wide temperature range under both humidified and anhydrous conditions is of great significance for practical applications. In this paper, we develop a coprecipitation synthesis approach for a new proton-conducting nanocomposite, [Bi2O2]Hx-PA0.28, which consists of a layered framework with [Bi2O2]2+ and phytic acid (C6H18O24P6, abbreviated as PA) existing as interlayer-embedded charge-balancing anions. Infrared spectroscopy (FTIR), solid-state NMR, Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS) suggest that oxygen atoms on the surface of the [Bi2O2]2+ layer bridge the uncoordinated oxygen atoms on the phosphate group to form a strong hydrogen bonding network. This leads to a water-assisted proton conductivity of 1.76 × 10–2 S cm–1 at 90 °C under 98% RH and even a stable anhydrous proton conductivity of 5.24 × 10–3 S cm–1 at 150 °C. Isotope effect tests have verified the selective transmission of hydrogen ions by the composite electrolyte materials. [Bi2O2]Hx-PA0.28 as electrolyte was further assembled into an ion-selective electrode for the recognition of hydrogen ions. Furthermore, open circuit potential time (OCPT) testing further confirms that solid-state electrolytes composed of [Bi2O2]Hx-PA0.28 exhibit a good electrochemical stability. This work broadens the possibilities for the development of solid-state proton conductors in a wide temperature range, even under anhydrous conditions.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Pengfei Yang,Hong Wu,Niaz Ali Khan,Benbing Shi,Xueyi He,Li Cao,Xunli Mao,Rui Zhao,Ming Qiu,Zhongyi Jiang
Graphene oxide (GO) membrane, possessing well-aligned laminar interlayer channels and oxygen bearing groups, offers great potentials as proton conductor in fuel cells. Yet, the scarcity and non-uniform distribution of proton conducting sites in the interlayer channels often lead to low conductivity and hinder the use of GO membranes for proton conduction. Single strand deoxyribonucleic acid (ssDNA) molecules bear abundant phosphate and amidogen groups which can act as proton conducting sites. The sequentially arranged phosphate and amidogen groups are in a linear molecule chain, which accords with the ideal arrangement of proton conducting sites. Herein, we intercalated ssDNA into GO interlayer channels via a pre-assembly process to create high-efficient proton conducting channels. GO nanosheets offer well-aligned 2D physical channels and ssDNA provides large amount of sequentially arranged proton conducting sites, which synergistically enhance proton conduction. The DNA@GO-3 membrane shows a proton conductivity of 564.8 mS cm −1 at 80 °C and 98% RH, which is 4.4-fold higher than that of pristine GO membrane and among the highest of the reported GO-based membranes. The H 2 /O 2 single fuel cell performance is improved by nearly 3 folds in terms of maximum power density.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2020
·
IF 4.473
Xiuwei Sun,Shumei Liu,Shan Zhang,Tianyi Dang,Hongrui Tian,Ying Lu,Shuxia Liu
Almost all proton-conducting materials display poor conductivity at subzero temperatures, which significantly limits their application in cold regions. Thus, effective strategies to achieve high proton conductivity in a wide range from subzero to medium temperatures (−40 to 85 °C) need to be developed. Herein, we prepared proton-conductive materials by encapsulating the acid–base adduct based on Keggin-type H3PW12O40 (HPW) and aminoethanesulfonic acid (C2H7O3NS, HSN) in the linear channels of SBA-15 (named HPW-HSN@SBA-15). The result is the same as we expected: HPW-HSN@SBA-15 exhibits high proton conductivity over a wide temperature range (−40 to 85 °C). The proton conductivity of 75 wt % HPW-HSN@SBA-15 (3HPW-HSN@SBA-15) reaches 0.16 S cm–1 at 85 °C, 97% relative humidity (RH), and 6.8 × 10–5 S cm–1 at −40 °C. The excellent proton conductivity at subzero temperature of HPW-HSN@SBA-15 is mainly attributed to the ultrafast proton transfer with low energy barrier between proton donor (acid group) and proton acceptor (base group) in acid–base adduct without the attendance of water. Furthermore, the proton conductivity cycle test of 3HPW-HSN@SBA-15 demonstrates its good durability and stability.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2019
·
IF 2.291
Yumei Mao,Ying Zhang,Lei Li,Jing Li,Hongmei Zeng,Guohong Zou,Zhien Lin
Two new metal phosphates , namely, Zn(HPO 4 )(mmim) (SCU-21) and 2-Hmim·In(HPO 4 ) 2 (H 2 O) 2 (SCU-22), where mmim = 1,2-dimethylimidazole and 2-Hmim = 2-methylimidazolium, are synthesized and their properties are evaluated. The SCU-21 and SCU-22 compounds have layered structures with fes and sql nets, respectively. SCU-21 shows a strong blue emission under the excitation at 365 nm. SCU-22 shows a proton conductivity of 1.56 × 10 −5 S cm −1 at 85 °C under 95% relative humidity.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2024
·
IF 6.9
Wenli Wu,Lei Feng,Wei Tan,Liqin Han,Qunfeng Yue,Feng Zhang,Xiaoqiang Liang
The rich activated protons and effective proton-conducting paths are of importance to improve conductivities of conductors. Herein, a series of Brönsted acids as proton carrier and proton transfer sites is introduced into the highly stable MOF , contributing to create plentiful hydrogen bonds within frameworks. Consequently, the trifluoromethanesulfonic acid-embedded JUC-1000 ([Cu 24 (BDPO) 12 (H 2 O) 12 ]) displays the relatively highest conductivity of 7.04 × 10 −4 S cm −1 under ∼98% RH and 328 K, ∼16 times that of JUC-1000 (4.47 × 10 −5 S cm −1 ). When TMSA@JUC-1000 (TMSA = CF 3 SO 3 H) blended with chitosan (CS), the proton conductivity of TMSA@JUC-1000/CS-15 is the highest at ∼76% RH and 328 K (1.01×10 −2 S cm −1 ), which is six times higher than that of JUC-1000/CS (1.85×10 −3 S cm −1 ). The CS contains abundant –NH 2 and –OH groups as proton jumping sites, which would activate the –NH– or –OH bonds of JUC-1000 and the acidic groups in Brönsted acids . These would result in an increased content of activated protons and effective formation of H-bonding nets by acid-base interactions. The findings provide valuable insights into the potential application of MOFs materials in energy devices.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Xiuwei Sun,Xue Bai,Qian Wang,Ying Lu,Shuxia Liu
Most reported proton-conducting materials use water molecules as media for proton transport, but their low operating temperatures (below the boiling point of water) and humidity-dependent conductivity limit their extensive applications. This motivated researchers to explore high-temperature proton-conducting materials employing nonaqueous media. The acid–base adduct HPW-SA formed by Keggin-type phosphotungstic acid (H3PW12O40, abbreviated as HPW) and sulfamic acid (SA) shows high proton conductivity in the high-temperature region (160–190 °C), owing to its proton mobility remarkably enhanced by its solid–liquid transition. Inspired by this, we encapsulated the HPW-SA adduct into the cages of MIL-101 by the postsynthetic method to prepare the composite HPW-SA@MIL-101, aiming at taking full advantage of the proton conduction feature of the HPW-SA adduct while avoiding the problems of flowing away and corrosion caused by the independent use of HPW-SA adduct. As expected, HPW-SA@MIL-101 exhibits high proton conductivity (0.85 × 10–3–1.1 × 10–3 S cm–1) in the range of 160–190 °C. Its proton transfer activation energy (Ea) is 0.58 eV in the range of 160–190 °C, which indicates that proton migration is dominated by the diffusion effect following a vehicle mechanism. In addition, the proton conductivity of HPW-SA@MIL-101 did not decrease after six cycles of heating and cooling tests, showing good repeatability and stability.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2022
·
IF 4.432
Zhifu Guan,Yiqi Jin,Sha Shi,Biyao Jin,Meishan Zhang,Lianhua Zhao
To enhance the conductivity of sulfonated polyether ether ketone (SPEEK, SP) membrane and avoid the loss of ionic liquid (IL), using aminopropyloligosisiloxane (NH 2 -POSS) as molecular hybrid filler, a self-assembled medium temperature and non-humidified SP/IL/NH 2 -POSS hybrid membrane was prepared. NH 2 -POSS can be assembled into the hydrophilic domain ion phase of SPEEK. In which, –NH 2 of NH 2 -POSS and –SO 3 H of SPEEK formed acid-base pairs at the interface which were conducive to the construction of proton transport channel. In addition, NH 2 -POSS enriched IL in the hydrophilic domain, which retained IL while synergistically increased the conductivity. The results showed that the IL loss rate of SP/IL/NH 2 -POSS-2 membrane was 46.9 wt%, which was about 55.8% of SP/IL membrane; the conductivity of SP/IL/NH 2 -POSS-2 membrane at 200 °C without humidification was 5.51 mS·cm −1 , which was about 4 times that of SP/IL membrane.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2016
·
IF 6.333
Yongheng Yin,Zhen Li,Xin Yang,Li Cao,Chongbin Wang,Bei Zhang,Hong Wu,Zhongyi Jiang
Design and fabrication of efficient proton transport channels within solid electrolytes is crucial and challenging to new energy-relevant devices such as proton exchange membrane fuel cells (PEMFCs). In this study, the phosphoric acid (H 3 PO 4 ) molecules are impregnated into SNW-1-type covalent organic frameworks (COFs) via vacuum assisted method. High loading of H 3 PO 4 in SNW-1 and low guest leaching rate are achieved due to the similar diameter between H 3 PO 4 and micropores in SNW-1. Then the COF-based composite membranes are fabricated for the first time with impregnated COFs (H 3 PO 4 @SNW-1) and Nafion matrix . For the composite membranes, the acid-base pairs formed between H 3 PO 4 @SNW-1 networks and Nafion optimize the interfacial interactions and hydrophilic domains. The acidic –PO 3 H 2 groups in pores of H 3 PO 4 @SNW-1 provide abundant proton transfer sites. As a result, the continuous proton transfer channels with low energy barrier are created. At the filler content of 15 wt%, the composite membrane exhibits a superior proton conductivity of 0.0604 S cm −1 at 51% relative humidity and 80 °C. At the same time, the maximum power density of single fuel cell is 60.3% higher than that of the recast Nafion membrane .
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Tingting Zhang,Guangli Yu,Xiaoqiang Liang,Nian Zhao,Feng Zhang,Fengyu Qu
Imidazolium based ionic liquids (denoted BMIM-ILs) with the altering anions (OH − , HCO 3 − and AcO − ) as ionic carriers were synthesized and bottle around ship introduced into the cages of zeolite-type metal organic frameworks (ZIF-8) as porous host, resulting in a series of anion-containing composites (BMIM-ILs/ZIF-8) with anion conducting. Bottle around ship method could integrate with the superiorities of BMIM-ILs and ZIF-8 for more excelling conduction and quite eliminate IL leakage. Besides, the hybrid membranes combined BMIM-ILs/ZIF-8 as fillers with polymer blends consisting of polyvinylidene fluoride (PVDF) and polyvinylpyrrolidone (PVP) as matrix were assembled with varying weight percentages. The structures of the prepared composites and hybrid membranes were inspected. It should be noted that ZIF-8 encapsulating into BMIM-OH (6.8 × 10 −4 S cm −1 ) and BMIM-HCO 3 (1.08 × 10 −3 S cm −1 ) reveal two orders of magnitude increase in conductivity-values comparison to that of the parent framework (2.3× 10 −5 S cm −1 ) at 353 K and ∼98% relative humidity (RH). The hybrid membrane containing 30%BMIM-OH/ZIF-8 has the advantage in proton conductivity of 1.02 × 10 −3 S cm −1 at 353 K and ∼98% RH, which is 6.49 times higher than that of the ZIF-8/PVP/PVDF. The activation energies (E a ) of BMIM-OH/ZIF-8 and its hybrid membrane are calculated to be 0.15 eV and 0.23 eV, respectively. They could be regarded as a fast-ion conductor on the ground of high conduction and low activation energy, which make them bright outlooks and wonderful potential for electrochemical devices .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Xueyi He,Guangwei He,Anqi Zhao,Fei Wang,Xunli Mao,Yongheng Yin,Li Cao,Bei Zhang,Hong Wu,Zhongyi Jiang
Nafion, as a state-of-the-art solid electrolyte for proton exchange membrane fuel cells (PEMFCs), suffers from drastic decline in proton conductivity with decreasing humidity, which significantly restricts the efficient and stable operation of the fuel cell system. In this study, the proton conductivity of Nafion at low relative humidity (RH) was remarkably enhanced by incorporating multifunctional graphene oxide (GO) nanosheets as multifunctional fillers. Through surface-initiated atom transfer radical polymerization of sulfopropyl methacrylate (SPM) and poly(ethylene glycol) methyl ether methacrylate, the copolymer-grafted GO was synthesized and incorporated into the Nafion matrix, generating efficient paths at the Nafion–GO interface for proton conduction. The Lewis basic oxygen atoms of ethylene oxide (EO) units and sulfonated acid groups of SPM monomers served as additional proton binding and release sites to facilitate the proton hopping through the membrane. Meanwhile, the hygroscopic EO units enhanced the water retention property of the composite membrane, conferring a dramatic increase in proton conductivity under low humidity. With 1 wt % filler loading, the composite membrane displayed the highest proton conductivity of 2.98 × 10–2 S cm–1 at 80 °C and 40% RH, which was 10 times higher than that of recast Nafion. Meanwhile, the Nafion composite exhibited a 135.5% increase in peak power density at 60 °C and 50% RH, indicating its great application potential in PEMFCs.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2020
·Vol. 31
·期 7
·1571-1580
·
IF 2.578
Xianlin Xu,Zhufeng Shao,Lei Shi,Bowen Cheng,Xuan Yin,Xupin Zhuang,Youbo Di
Effective proton conducting sites and establishing proton channels are two critical factors in developing high-performance proton exchange membranes. This study first establishes a strategy in designing effective proton conducting channels for Nafion by using solution blowing of sulfonated polyethersulfone (SPES) nanofibers containing CC3, which is an emerging porous organic cage that possesses the advantages of dissolvable organic solvents and high proton conduction from its interconnected three-dimensional pore structure. Our strategy results in SPES nanofiber networks with CC3 uniformly involved in and composite membranes with Nafion-filled interfiber voids. Benefiting from such structural features, the composite membrane exhibits high proton conductivity (0.315 S cm −1 at 80°C and 100% RH), low methanol permeability (0.69 × 10 −7 cm 2 S −1 ), excellent water absorption, thermal and dimensional stability, and single-cell performance. This study provides not only a valuable reference for the application of CC3 but also a new idea for establishment of proton transfer channels.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2022
·Vol. 18
·期 48
·2205444
·
IF 15.153
Wei-Lian Xie,Xiao-Min Li,Jiao-Min Lin,Long-zhang Dong,Yu Chen,Ning Li,Jing-Wen Shi,Jing-Jing Liu,Jiang Liu,Shun-Li Li,Ya-Qian Lan
Metal-oxo clusters have emerged as advanced proton conductors with well-defined and tunable structures. Nevertheless, the exploitation of metal-oxo clusters with high and stable proton conductivity over a relatively wide temperature range still remains a great challenge. Herein, three sulfate groups decorated zirconium-oxo clusters ( Zr 6 , Zr 18 , and Zr 70 ) as proton conductors are reported, which exhibit ultrahigh bulk proton conductivities of 1.71 × 10 −1 , 2.01 × 10 −2 , and 3.73 × 10 −2 S cm −1 under 70 °C and 98% relative humidity (RH), respectively. Remarkably, Zr 6 and Zr 70 with multiple sulfate groups as proton hopping sites show ultralow activation energies of 0.22 and 0.18 eV, respectively, and stable bulk conductivities of >10 −2 S cm −1 between 30 and 70 °C at 98% RH. Moreover, a time-dependent proton conductivity test reveals that the best performing Zr 6 can maintain high proton conductivity up to 15 h with negligible loss at 70 °C and 98% RH, representing one of the best crystalline cluster-based proton conducting materials.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）