INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2020
·
IF 4.939
Li Wang,Lili Cui,Xin Ge,Nailin Yue,Xingquan He,Wei Zhang,Tewodros Asefa
Developing efficient nonprecious electrocatalysts that can drive the oxygen electrode reactions in zinc-air batteries (ZABs) is important but remains challenging. In this work, novel materials comprising Mn/Cu nanoclusters-grafted N-doped carbon nanotubes are synthesized by preparing and then pyrolyzing Mn/Cu polyphthalocyanine-encapsulated carbon nanotubes (CNTs), followed by treating the products with acidic solution. The materials are named CNTs@(Mn,Cu)PPc-T, where T denotes the pyrolysis temperature in °C, and they are demonstrated to serve as efficient oxygen electrode catalysts for zinc-air batteries (ZABs). Among them, the one synthesized at 900 °C, CNTs@(Mn,Cu)PPc-900, requires more positive onset and half-wave potentials for reduction of oxygen and a low overpotential for the evolution of oxygen. A rechargeable ZAB assembled with CNTs@(Mn,Cu)PPc-900 electrocatalyst delivers a high power density (158.5 mW cm −2 ) and displays an excellent stability in 200 cycles of charge/discharge (in over 33 h). Such performance is even superior to that of a ZAB containing the benchmark Pt/C + RuO 2 catalyst as an air cathode under identical testing condition.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2020
·Vol. 13
·期 10
·2267
·
IF 3.057
Xiaodong Zuo,Zhiyi Chen,Chengzhi Guan,Kongfa Chen,Sanzhao Song,Guoping Xiao,Yuepeng Pang,Jian-Qiang Wang
Nanoscale perovskite oxides with enhanced electrocatalytic activities have been widely used as oxygen electrodes of reversible solid oxide cells (RSOC). Here, La0.6Sr0.4FeO3−δ(LSF) nanoscale powder is synthesized via a novel molten salt method using chlorides as the reaction medium and fired at 850 °C for 5 h after removing the additives. A direct assembly method is employed to fabricate the LSF electrode without a pre-sintering process at high temperature. The microstructure characterization ensures that the direct assembly process will not damage the porosity of LSF. When operating as a solid oxide fuel cell (SOFC), the LSF cell exhibits a peak power density of 1.36, 1.07 and 0.7 W/cm2at 800, 750 and 700 °C, respectively, while in solid oxide electrolysis cell (SOEC) mode, the electrolysis current density reaches 1.52, 0.98 and 0.53 A/cm2under an electrolysis voltage of 1.3 V, respectively. Thus, it indicates that the molten salt routine is a promising method for the synthesis of highly active perovskite LSF powders for directly assembled oxygen electrodes of RSOC.Keywords:reversible solid oxide fuel cell;molten salt synthesis;interface;LSF oxygen electrode;direct assembly
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Energy
·
2018
·
IF 13.12
Yuanhui Cheng,Dongming Li,Lei Shi,Zhonghua Xiang
Air-based flow batteries have triggered huge interests as promising large-scale energy storage devices due to their high energy density and extremely low cost. However, the sluggish kinetics of oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) lower their energy conversion efficiencies . Herein, we in situ grow amorphous NiS x -FeO y particles on sulfur doped carbon fiber paper (termed as NiS x -FeO y /SCFP) as practical self-supported oxygen electrode through a simple and economic synthesis route. Benefiting from the synergetic effects of amorphous NiS x -FeO y and SCFP, NiS x -FeO y /SCFP possesses massively accessible active sites, enhanced electrons and reactants transfer, and stable integrated structure, exhibiting a low overpotential (0.37 V) at 10 mA cm −2 for OER, a positive half-wave potential for ORR and a small potential gap (0.82 V). Zinc air flow battery assembled with newly developed NiS x -FeO y /SCFP shows a coulombic efficiency of 100% and a voltage efficiency of 50% at the charge-discharge current of 10 mA cm −2 , and vigorously operates 110 h without performance decay, showing highly catalytic activity and super cycling stability, which are among the best performance ever reported. We believe that this work will open up new ways for fabricating practical oxygen electrode for metal air based batteries applications.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Weichao Xie,Yijiang Liu,Hongbiao Chen,Mei Yang,Bei Liu,Huaming Li
In this work, we present an efficient bifunctional electrocatalyst comprising iron-nickel (FeNi) alloy nanoparticles confined in nitrogen-doped carbon nanotubes (denoted FeNi-NCNT) for zinc-air batteries. The FeNi-NCNT electrocatalyst is fabricated by anion-exchange of nickel(II) ion/zinc(II) ion-2,4,6-tris-(di(pyridin-2-yl)amino)-1,3,5-triazine complex with ferricyanide anion followed by mixing with melamine and then carbonization. The resultant FeNi-NCNT electrocatalyst displays excellent bifunctional activity with a low reversible oxygen electrode index of 0.725 V. The rechargeable aqueous zinc-air battery fabricated with FeNi-NCNT air cathode manifests both high specific capacity (819 mAh g −1 Zn at 5.0 mA cm −2 ) and long cycle life (1500 cycles/1000 h at 10 mA cm −2 , 600 cycles/400 h at 25 mA cm −2 , and 165 cycles/110 h at 50 mA cm −2 ). Moreover, flexible solid-state zinc-air battery assembled with FeNi-NCNT air cathode can deliver a specific capacity of 765 mAh g −1 Zn at 5.0 mA cm −2 , a power density of 84.8 mW cm −2 , and a cycle life of 110 h (330 cycles) at 2.0 mA cm −2 .
研究领域:
材料科学
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电化学
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能源存储与转换
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF RARE EARTHS
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2022
·
IF 4.632
Rui Yang,Yunfeng Tian,Yun Liu,Jian Pu,Bo Chi
To promote the electrocatalytic activity and stability of traditional La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3– δ (LSCF) oxygen electrodes in reversible solid oxide cells (RSOCs), conventional physical mixed method was used to prepare the Pd-LSCF composite oxygen electrode. The cell with Pd-LSCF|GDC|YSZ|Ni-YSZ configuration shows perfect electrochemical performance in both solid oxide fuel cell (SOFC) mode and solid oxide electrolysis cell (SOEC) mode. In the SOFC mode, the cell achieves a power density of 1.73 W/cm 2 at 800 °C, higher than that of the LSCF oxygen electrode with 1.38 W/cm 2 . In the SOEC mode, the current density at 1.5 V is 1.67 A/cm 2 at 800 °C under 50 vol% steam concentration. Moreover, the reversibility and stability of the RSOCs were tested during 192 h long-term reversible operation. The degradation rate of the cell is only 2.2%/100 h and 2.5%/100 h in the SOEC and the SOFC modes, respectively. These results confirm that compositing Pd with the LSCF oxygen electrode can considerably boost the electrochemical performance of LSCF electrode in RSOCs field.
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Rong Fang,Hongwei Hu,Jiupai Ni,Chengsheng Ni
ZnO is a semiconductor with a reactive surface due to the presence of oxygen vacancies, but its application in solid oxide electrochemical cells (SOCs) was limited by its low electronic conductivity. Aluminum-doped zinc oxide (AZO), an n -type transparent conductive oxide, is explored for the reversible SOCs. Interestingly, 2 at. % of alumina doping in zinc oxide (AZO-2) increased the electric conductivity of ZnO to 1 Scm −1 at 800 °C. The K chem (5.98 x 10 −8 cm s −1 ) of AZO-2 from electric conductivity relaxation is 91% higher than that of ZnO. AZO-2 electrode on Y 0.16 Zr 0.84 O 1.92 (8YSZ) electrolyte exhibits a polarization resistance ( R p ) of 0.73 Ω cm 2 at open-circuit voltage and 800 °C, and the reaction is limited by the surface exchange of oxygen species. The surface exchange current density of AZO-2 cathode on Y 0.16 Zr 0.84 O 1.92 is 0.0736 A cm -2 at 800 °C. AZO-2 electrode can be activated after 20 cycles of switching bias, and the R p is further decreases to 0.26 Ω cm 2 . This study confirms that AZO with an enhanced electric conductivity can be used for the oxygen electrode of a reversible SOC due to the fast surface oxygen exchange over the defective surface with couple Zn 2+ and O 2− vacancies.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2020
·Vol. 36
·期 6
·1153-1160
·
IF 1.063
Wang Huanfeng,Li Junfeng,Li Fei,Li Jingjing,Xu Jijing
Highly stable and efficient bifunctional air cathode catalyst is crucial to rechargeable metal-air batteries. Herein, a ternary nanoalloy layer composed of noble and base metal coated on a three-dimensional porous Ni sponge as the bifunctional cathode is synthesized through in-situ anchoring strategy, which can effectively keep the multi-metal nanoparticles from agglomeration and improve the density of active sites and catalytic activity. The prepared catalyst displays an excellent catalytic performance with lower overpotential and long-term stability. The Zn-air batteries with the as-prepared cathodes possess a large power density of 170 mW/cm 2 , long cycling stability up to 230 cycles, and a high specific capacity of 771 mA·h/g. Furthermore, the corresponding Li-air batteries deliver a discharge capacity of 22429 mA·h/g. These superior properties of the metal-air batteries can be attributed to the combined influence of design and composition of electrode, which is of great significance to improve the electrochemical catalytic activity, providing great potential of wide application in expanded rechargeable energy systems.
研究领域:
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 Applied Energy Materials
·
2023
·
IF 6.4
Ziyi Zhu,Mingyang Zhou,Zidai Fan,Qiwen Wu,Kai Tan,Yan Liu,Yu Chen,Jiang Liu
Proton-conducting solid oxide cells are regarded as promising solid-state energy conversion devices to realize the high-efficiency conversion between electrical energy and chemical energy. However, the high cost, easily reducible ion characteristics, and large thermal expansion coefficient related to the valence state of the traditional high-catalytic cobalt-based oxygen electrode are unavoidable problems. Cobalt-free barium ferrite-based oxides with triple-conducting properties are considered the most promising prospective candidates for highly active oxygen electrode materials because of the increased electrochemical reaction active sites, excellent thermal stability, and low thermal expansion coefficient. In this work, by introducing 5% A-site deficiency at the atomic scale, the oxygen vacancy concentration is increased so that the catalytic reaction kinetics and proton-conduction ability of ABO3-type perovskite oxygen electrode material BaFe0.5Sn0.2Bi0.3O3−δ are improved. The effects of non-stoichiometry on the phase composition, microstructure, hydration capacity, thermal expansion characteristics, conductivity, and chemical stability are investigated. In both fuel cell and electrolysis cell operation modes, the proton-conducting solid oxide cells with the A-site-deficient Ba0.95Fe0.5Sn0.2Bi0.3O3−δ oxygen electrode demonstrate excellent electrochemical performance, giving a peak power density of 0.69 W cm–2 (increased by 19.0%) and an electrolysis current density of 1.64 A cm–2 (increased by 30.2%) at 700 °C. Moreover, even at 600 °C with 50% high steam partial pressure, electrolysis for hydrogen production is maintained for about 100 h without significant attenuation, confirming the vital role of A-site defect engineering in the design of advanced oxygen electrode materials.
研究领域:
材料科学
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能源工程
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2023
·
IF 4.2
Yiping Yang,Jingxuan Hao,Xinting Lv,Jinyong Lei,Xurui Huang,Jun Pan,Fengyuan Yu,Zihao Liao,Jing Zhou,Guoping Xiao,Xiao Lin,Jian-Qiang Wang,Linjuan Zhang
In reversible solid oxide cells (rSOCs), the slow reaction rate of oxygen reduction reaction and the rate of OER were the primary issues limiting their development. Up to now, a large amount of oxygen electrode materials have been studied for high-temperature rSOC, but stable materials that can be applied to large cells are still relatively rare. At present, LSCF remains the most important material for oxygen electrodes in the large-scale production of rSOCs. In this work, low-coordination Au nanoparticles were loaded onto the surface of LSCF. The maximum power density of the LSCFA oxygen electrode single cell at 0.6 V is up to 0.79 W/cm2, 1.58 times that of the pure LSCF-based single cell, and the current density of 1.3 V under SOEC mode is up to 1 A/cm2, which is 1.6 times that of the pure LSCF-based single cell. DRT analysis shows that the introduction of a low coordination number Au not only significantly reduces the Ohmic impedance of LSCF itself but also improves the conductivity of O2–. The development of this work is of great importance for the subsequent development of high-performance and high-stability rSOC.
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
产品关联
DOI
高影响因子
RARE METALS
·
2025
·
IF 11
Song Lin-Lin,Ren Rong-Zheng,Wang Zhen-Hua,Zhang Jing,Qiao Jin-Shuo,Sun Wang,Sun Ke-Ning
The proton ceramic electrochemical cell (PCEC), distinguished by its robust all-solid-state construction, emerges as a particularly promising contender in the realm of hydrogen production technologies. However, inadequate water-storage capability (hydration) and limited proton mobility within conventional PCEC oxygen electrodes hinder the efficiency of water splitting to oxygen, thereby restricting the broader application of PCECs. Here, we report a Ni-doped perovskite oxygen electrode Sr 2 Fe 1.4 Ni 0.1 Mo 0.5 O 6- δ (SFNM), where the incorporation of nickel can effectively amplify the concentration of oxygen vacancies while synergistically enhancing the hydration interaction between water molecules and the perovskite lattice. The enhanced hydration capacity facilitates proton-defect formation and lowers the energy barrier for proton migration. Benefiting from these synergistic enhancements, SFNM demonstrates a substantially reduced polarization resistance of approximately 0.078 Ω cm 2 at 700 °C under humidified conditions ( p H 2 O = 0.1 atm). A PCEC utilizing the SFNM electrode achieves a remarkable current density of 2.60 A cm 2 with an applied voltage of 1.3 V at 700 °C. Furthermore, the PCEC exhibits favorable stability over a duration of 200 h. These outstanding results emphasize the potential of Ni doping to substantially improve both the hydration efficiency and proton mobility within perovskite electrode materials, positioning them as excellent candidates for high-performance PCECs. Graphical abstract
研究领域:
电化学
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能源材料
·
固态离子学
·
氢能技术
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功能陶瓷
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催化材料
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Gaoxia Mei,Lili Cui,Zhiyu Dou,Xingquan He
Developing robust dual-function oxygen electrode reaction catalysts is vital toward renewable/rechargeable energy systems but remains challenging. In this work, novel electrocatalytically active hybrid materials comprising Fe 0.5 Co 0.4 Ni 0.1 alloy nanoparticles-embedded N-doped carbon nanotubes , named CNTs@(Fe,Co,Ni)PP-T (where T denotes the pyrolysis temperature employed to prepare them), are developed by pyrolyzing the mixture of hyperbranched tri-metal (Fe, Co, Ni)-coordinated polyporphyrin-encapsulated carboxylic acid-functionalized carbon nanotubes and melamine . The materials are demonstrated to act as effective bifunctional oxygen electrode catalysts. Especially, the one generated at 800 °C, termed as CNTs@(Fe,Co,Ni)PP-800, has larger specific surface area, larger active surface area and better electrical conductivity than other as-obtained contrast materials. Undoubtedly, this material displays superior reactive activity for O 2 -associated electrochemical reactions in alkaline media, delivering more positive onset (0.988 V vs . RHE) and half-wave (0.837 V vs . RHE) potentials for the reduction of oxygen and a smaller overpotential (355 mV) at 10 mA cm −2 for the evolution of oxygen than its counterparts. In practical application, the CNTs@(Fe,Co,Ni)PP-800 based zinc-air battery (ZAB) achieves a small initial charge-discharge voltage gap of 0.69 V at 2 mA cm −2 and an outstanding cycling durability in 300 cycles of charge-discharge (in over 50 h), superior to the benchmark Pt/C+RuO 2 based ZAB under the identical testing conditions.
研究领域:
材料科学
·
能源化学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·Vol. 21
·期 40
·e09293
·
IF 12.1
Jianxiong Wang,Zuo Li,Wei Chen,Longfei Sun,Chunwen Sun,Suping Peng
Reversible protonic ceramic cells (R-PCCs) are a kind of distinguished long-time energy conversion and storage device. The utilization of oxygen electrodes is vital to achieve high electrochemical performances for R-PCCs, demanding high catalytic activity toward oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and appropriate thermal expansion coefficients (TEC). Herein, novel high-entropy perovskites Pr 0.2 Ba 0.2 Sr 0.2 La 0.2 Nd 0.2 MeO 3-δ (Me = Co, Fe, Mn) are explored. Pr 0.2 Ba 0.2 Sr 0.2 La 0.2 Nd 0.2 CoO 3-δ (PBSLNC) exhibits a TEC of 12.02 × 10 −6 K −1 , which is thermomechanical compatible with BaCe 0.7 Zr 0.1 Y 0.1 Yb 0.1 O 3-δ (BCZYYb) electrolyte. The cell with PBSLNC electrode delivers a peak power density of 0.87 W cm −2 in fuel cell (FC) mode and a current density of −1.39 A cm −2 at 1.3V and 650 °C under H 2 O electrolysis (EC) mode. The R-PCCs with PBSLNC electrode also achieve a distinguished current density of −1.45 A cm −2 at 1.3 V and 700 °C under CO 2 -H 2 O co-electrolysis condition. Moreover, the R-PCCs with PBSLNC electrode demonstrate exceptional stability for 150 h in both FC and EC modes, 96 h in H 2 O-CO 2 co-electrolysis mode, and 100 h (10 cycles) in reversible mode. This research provides a novel oxygen electrode for R-PCCs, as well as a strategy to design efficient Co-based oxide catalysts with low TEC for advanced R-PCCs.
研究领域:
材料科学
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电化学
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能源存储与转换
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固体氧化物电化学
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功能陶瓷
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催化材料
✓ 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）