JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2023
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IF 5.7
Mingyang Hou,Feng Zhu,Ying Liu,Yu Chen
Protonic ceramic electrochemical cells (PCECs) have received extensive attention for encouraging energy conversion and storage efficiencies. One of the key obstacles hindering the development of PCECs is the time-consuming and costly fabrication processes. In this study, we have fabricated fuel electrode-supported tubular PCECs via a facile and well-controlled phase inversion methhod combined with a dip-coating process. When operated in a fuel cell (FC) mode, single cells exhibit excellent peak power densities of 0.48, 0.91, 1.50, and 2.62 W cm -2 at 550–700 ℃, respectively. While in electrolysis cell (EC) mode, these tubular cells achieve high electrolysis current densities of − 0.61, − 1.59, − 3.03, and − 4.67 A cm -2 with reasonable Faradaic efficiencies at 550–700 ℃ and an applied voltage of 1.3 V, respectively. Additionally, cells can be stably operated at 0.5 A cm -2 for 120 h in FC mode and − 0.5 A cm -2 for 110 h in EC mode at 650 °C.
研究领域:
能量转换与存储
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材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
TRANSACTIONS OF TIANJIN UNIVERSITY
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2024
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IF 6.7
Liu Weihao,Liu Qingtao,Wan Xin,Shui Jianglan
Non-precious metal electrocatalysts (such as Fe–N–C materials) for the oxygen (O 2 ) reduction reaction demand a high catalyst loading in fuel cell devices to achieve workable performance. However, the extremely low solubility of O 2 in water creates severe mass transport resistance in the thick catalyst layer of Fe–N–C catalysts. Here, we introduce silicalite-1 nanocrystals with hydrophobic cavities as sustainable O 2 reservoirs to overcome the mass transport issue of Fe–N–C catalysts. The extra O 2 supply to the adjacent catalysts significantly alleviated the negative effects of the severe mass transport resistance. The hybrid catalyst (Fe–N–C@silicalite-1) achieved a higher limiting current density than Fe–N–C in the half-cell test. In the H 2 –O 2 and H 2 –air proton exchange membrane fuel cells, Fe–N–C@silicalite-1 exhibited a 16.3% and 20.2% increase in peak power density compared with Fe–N–C, respectively. The O 2 -concentrating additive provides an effective approach for improving the mass transport imposed by the low solubility of O 2 in water.
研究领域:
材料科学
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电化学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-10
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IF 14.7
Yin Shuhu,Chen Long,Yang Jian,Cheng Xiaoyang,Zeng Hongbin,Hong Yuhao,Huang Huan,Kuai Xiaoxiao,Lin Yangu,Huang Rui,Jiang Yanxia,Sun Shigang
Replacement of expensive and rare platinum with metal–nitrogen–carbon catalysts for oxygen reduction reactions in proton exchange membrane fuel cells is hindered by their inferior activity. Herein, we report a highly active iron-nitrogen-carbon catalyst by optimizing the carbon structure and coordination environments of Fe-N 4 sites. A critical high-temperature treatment with ammonium chloride and ammonium bromide not only enhances the intrinsic activity and density of Fe-N 4 sites, but also introduces numerous defects, trace Br ions and creates mesopores in the carbon framework. Notably, surface Br ions significantly improve the interaction between the ionomer and catalyst particles, promoting ionomer infiltration and optimizing the O 2 transport and charge transfer at triple-phase boundary. This catalyst delivers a high peak power density of 1.86 W cm −2 and 54 mA cm −2 at 0.9 V iR-free in a H 2 -O 2 fuel cells at 80 °C. Our findings highlight the critical role of interface microenvironment regulation.
研究领域:
电化学
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催化
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能源材料
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燃料电池
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 35
·2303719
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IF 19
Nuo Shang,Keliang Wang,Manhui Wei,Yayu Zuo,Pengfei Zhang,Hengwei Wang,Zhuo Chen,Daiyuan Zhong,Pucheng Pei
Flexible Zn–air batteries (FZABs) have attracted more attention due to their high specific energy, excellent stability, and unique rechargeability. However, these batteries are limited by the low conductivity of the gel electrolytes used. Here a quasi-liquid gel with ionic conductivity comparable to liquid electrolytes is presented. The gel pore structure is guided and modified in situ with large-size silica to achieve clear and unbroken pores. The reduced skeleton structure leads to a significant increase in ionic conductivity to 562.6 mS cm −1 , enabling a peak power density of 154 mW cm −2 and a cycle life of over 40 h with a low charge–discharge gap. The FZABs also exhibit a high lifetime and potential advantages in 10 mA cm −2 charge/discharge testing, and demonstrate excellent performance in practical applications. This study offers new possibilities for developing high-performance quasi-liquid gels and innovative concepts for FZABs.
研究领域:
能源存储
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材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2024
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IF 7.1
Mengjiao Li,Tao Xu,Lingjun Huang,Zhidi Hu,Caiyuan Zhou,Duoduo Li,Jing Zhang,Enlai Hu,Zhongwei Chen
The continuous development of flexible electronics has driven researchers to intensively study zinc–air batteries with a theoretical high energy density, low cost, and high safety. However, conventional zinc–air batteries suffer from safety problems, such as electrolyte leakage. Therefore, the development of a green, renewable, and biodegradable solid electrolyte is urgently needed. In this work, a polymer electrolyte based on soybean protein isolate with high hydrophilicity, biodegradability, and ionic conductivity up to 0.024 S cm–1 is designed and applied to zinc–air batteries. The activation energy is obtained by calculating the slope of ln(σ) versus (1000/T) according to the Arrhenius equation, and OH– transport is mainly controlled by the Grotthuss mechanism. The resulting solid-state zinc–air battery has a stable discharge plateau of 1.2 V at 10 mA cm–2, a peak power density of up to 80 mW cm–2, and a long cycle stability of around 4300 min. This study provides a new option for designing green, economical, and biodegradable solid electrolyte and flexible sustainable energy storage devices from biomass.
研究领域:
材料科学
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能源存储
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可持续技术
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电化学
✓ 已验证
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
Yi-Cun Zhou,Ling Zhou,Chang-Ping Feng,Xiao-Tian Wu,Rui-Ying Bao,Zheng-Ying Liu,Ming-Bo Yang,Wei Yang
A kind of side-chain type anion exchange membranes (AEMs) with high ionic conductivity and good comprehensive stability was prepared via direct modification of commercial engineering plastic polyketone with diamines through Paal-Knorr reaction and quaternization reaction. It was found that the amount of diamine can effectively tune the microphase morphology and properties of the prepared quaternized functionalized-polyketone anion exchange membranes (QAFPK-AEMs). The tensile strength was increased from 18.6 MPa to 38.6 MPa, and the ion exchange capacity (IEC) was increased from 1.11 mmol/g to 2.71 mmol/g depending on the amount of added diamine. The QAFPK-1-6-AEM with the IEC of 1.43 mmol/g showed the highest hydroxide conductivity of 65 mS/cm at 25 °C and 96.8 mS/cm at 80 °C. The high ionic conductivity was achieved through the establishment of effective ionic channels, and it maintained 70% of the initial ionic conductivity after the 192 h treatment in 2 mol/L KOH (aq) at 80 °C. Moreover, a peak power density of 129 mW/cm 2 was achieved when the assembled single cell with QAFPK-1-6-AEM was operated at 50 °C. Thus, the prepared QAFPK-AEMs showed great potential applications for the anion exchange membrane fuel cells (AEMFCs).
研究领域:
材料科学
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化学工程
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能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
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2019
·Vol. 10
·期 1
·1-10
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IF 11.878
Yang Weifeng,Gong Wei,Hou Chengyi,Su Yun,Guo Yinben,Zhang Wei,Li Yaogang,Zhang Qinghong,Wang Hongzhi
Developing fabric-based electronics with good wearability is undoubtedly an urgent demand for wearable technologies. Although the state-of-the-art fabric-based wearable devices have shown unique advantages in the field of e-textiles, further efforts should be made before achieving “electronic clothing” due to the hard challenge of optimally unifying both promising electrical performance and comfortability in single device. Here, we report an all-fiber tribo-ferroelectric synergistic e-textile with outstanding thermal-moisture comfortability. Owing to a tribo-ferroelectric synergistic effect introduced by ferroelectric polymer nanofibers, the maximum peak power density of the e-textile reaches 5.2 W m −2 under low frequency motion, which is 7 times that of the state-of-the-art breathable triboelectric textiles. Electronic nanofiber materials form hierarchical networks in the e-textile hence lead to moisture wicking, which contributes to outstanding thermal-moisture comfortability of the e-textile. The all-fiber electronics is reliable in complicated real-life situation. Therefore, it is an idea prototypical example for electronic clothing.
研究领域:
材料科学
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电子学
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纺织工程
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可穿戴技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
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IF 6.7
Yuanjing Meng,Muhammad Akbar,Jie Gao,Manish Singh,Te-Wei Chiu,Baoyuan Wang,Chen Xia,Liangdong Fan
Insufficient ionic conductivity of electrolyte materials and high manufacturing costs create bottlenecks in the commercialization of low-temperature solid oxide fuel cells (LT-SOFCs). Developing the semiconductor-ionic electrolyte represents a new research strategy for high-performance LT-SOFCs because of their attractive ion conduction and associated low polarization loss. In this study, a self-assembly approach is demonstrated by incorporating ABO 3 perovskite La 0.7 Sr 0.3 Cr 0.5 Fe 0.5 O 3-δ (LSCrF) into the fluorite structure CeO 2 , for developing 1LSCrF-xCeO 2 composite as semiconductor-ionic heterostructure for LT-SOFCs with superior electrochemical efficiency at the temperature below 550 °C and even down to 370 °C over unmodified and mechanically mixed samples. Self-assembly enables abundant nanoscale hetero-interfaces accompanied by widely distributed oxygen vacancies , which leads to the superior ionic conductivity of 0.018–0.112 S cm −1 , lower activation energy of 0.54 eV and better peak power density of 136–735 mW cm −2 over control samples at 370–550 °C, and stable operation for 50 h of resultant LT-SOFCs under a galvanostatic mode. This work highlights the important role of self-assembly in designing heterostructural semiconductor based electrolytes for high-performance LT-SOFCs.
研究领域:
材料科学
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电化学
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能源技术
✓ 已验证
DOI
高影响因子
ACS Catalysis
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2020
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IF 12.35
Bangxin Li,Shuai He,Jibiao Li,Xiangling Yue,John T.S. Irvine,Deti Xie,Jiupai Ni,Chengsheng Ni
Employment of identical oxides for the cathode and anode in a symmetrical solid oxide fuel cell (SSOFC) is beneficial for decreasing the fabrication costs of a robust cell. Ce doping on the A site of SrFeO3 increased the structural stability in a reducing atmosphere, but ceria was found to exsolve from the perovskite during the cooling process in the air if the doping level reached 20 atom %. The additional doping of 5 atom % Ru in Sr0.8Ce0.2FeO3 on the Fe site could prevent the ceria segregation in air and induce the surface decomposition under fuel conditions for the formation of nanoscale SrO, CeO2, and Ru0. The SSOFC with Ce/Ru codoped SrFeO3 on a Sr- and Mg-doped LaGaO3 electrolyte showed a small Rp value (0.12 Ω cm2) when H2 and ambient air were used as fuel and oxidant, respectively. The peak power densities of 846 and 310 mW cm–2 were achieved at 800 °C using H2 and C3H8 as fuel, respectively. The excellent coke resistance of the anode could be related to the simultaneous in situ exsolution of CeO2, SrO, and Ru0 nanoparticles.
研究领域:
材料科学
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电化学
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能源材料
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燃料电池
✓ 已验证
产品关联
DOI
高影响因子
SYNTHETIC METALS
·
2023
·
IF 4.4
Tao Wang,Yu Zhao,Ruoxi Ma,Lijuan Li,Qianjun Ling,Xueliang Li,Yunsheng Ding,Haibing Wei
Dimensionally and chemically stable anion exchange membranes with excellent ion conductivity are highly desired in electrochemical energy conversion technologies. Herein, we present a design using rigid arylene units, i.e., p -tetraphenylene and p -terphenylene, to suppress the water sorption of quaternized poly(arylene alkylene) membranes with high ion contents. Of note, side chain double-quaternary ammonium (QA) functionalized poly( q -tetraphenylene- co - p -terphenylene alkylene) membrane P(4PA- co -3PA)-D100 with the IEC value as high as 2.93 mmol g −1 showed very limited water uptake and swelling at 80 °C of 75 wt% and 14 %, respectively. Meanwhile, the immiscibility of hydrophilic double-cation side chain and the hydrophobic poly(arylene alkylene) backbone drives the formation of phase-separated morphology. As a result, P(4PA- co -3PA)-D100 showed an exceptional conductivity of 227.8 mS cm −1 at 80 °C with activation energy of 10.5 kJ mol −1 . Despite the rigid poly(arylene alkylene) backbone with highly chemical durability and oxidative stability, the tandem tethered double cation in the side chain showed a 11 % QA moiety loss after a 1000-h treatment in 2 M NaOH at 80 °C. Moreover, a good peak power density of 550 mW cm −2 at the current density of 1.06 A cm −2 was achieved for P(4PA- co -3PA)-D100 with the gases flow of 200 mL min −1 . This work demonstrates that, in addition to the approach of cross-linking, the highly conductive AEMs with excellent dimensional stability can be achieved by improving the rigidity of polymer backbones.
研究领域:
材料科学
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电化学
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能源转换技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
·
IF 7.139
Liming Zhang,Bingjie Pang,Shiqing Hu,Zhongwei Cao,Peng Zhang,Xuefeng Zhu,Weishen Yang
Protonic ceramic fuel cells (PCFCs) are promising power generation equipment because of their high efficiency and low operating temperature. However, the sluggish oxidation-reduction reaction (ORR) kinetics of the cathode seriously limits their further development. Here, a low-valent alkaline-earth metal Mg-doped BaCo 0.4 Fe 0.4 Zr 0.2 O 3-δ (BaCo 0.4 Fe 0.4 Zr 0.1 Mg 0.1 O 3-δ = BCFZMg0.1) cathode is developed to increase oxygen vacancy concentration and hydration capability of mixed oxygen ion-electron conducting (MIEC) electrode materials . The phase composition , microstructure, and stability in wet air were examined, while the oxygen vacancy , hydration capability, conductivity, and surface species of the materials were investigated. Experimental results demonstrate that the oxygen vacancy concentration, hydration capability, and conductivity are all increased by Mg doping. Consequently, the ORR active sites were expanded to the whole electrode surface , and the electrochemical performance of PCFCs with BCFZMg0.1 cathode was greatly improved (peak power density: >40% increase; polarization resistance : 60–70% decrease). This work provides a new strategy to develop cathodes with high ORR activity for PCFCs by doping Mg into the MIEC perovskite B-site.
研究领域:
材料科学
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能源工程
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电化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Yiming Liang,Fulin Wang,Rui Cai,Jianen Huang,Umar Wahid,Xinrong Wei,Zhongfu Zhao,Wei Liu,Chunqing Zhang
Owing to structure advantages, poly(styrene-b-(ethylene-co-butylene)-b-styrene) (SEBS) has garnered significant attention in the field of anion exchange membranes (AEMs) for fuel cell applications . However, its low ionic conductivity has remained a formidable obstacle for high-performance SEBS based AEMs. Herein, an innovative approach is employed, incorporating ionic oligomeric polystyrene (OPS) into physically crosslinked SEBS based AEMs, to fabricate two series of OPS/SEBS AEMs via precise control of the molecular weight and load ratio of OPS, respectively. The variables are theoretically capable of decreasing the glass transition temperature ( T g ) of the polystyrene phase below the operating temperature of fuel cells. The results demonstrate that the lower molecular weight and the higher load quantity of OPS not only broaden the ion transport channels but also lower the energy barrier of the conducting polystyrene phase. Remarkably, the membrane (1300-CHM–OH–35) with an IEC of 2.41 mmol g −1 significantly improved the ionic conductivity to 150.9 mS cm −1 at 80 °C, despite its low total polystyrene content (45.78%), and attained a peak power density of 506.26 mW cm −2 at 1100 mA cm −2 in a H 2 /O 2 single cell operating at 70 °C. This outstanding performance underscores the promising potential of our approach in the development of high-performance SEBS AEMs for fuel cell applications.
研究领域:
材料科学
·
化学工程
·
能源技术
✓ 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）