Journal of Energy Chemistry
·
2023
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IF 13.1
Yuan Qin,Chaozhong Guo,Zihao Ou,Chuanlan Xu,Qi Lan,Rong Jin,Yao Liu,Yingchun Niu,Quan Xu,Yujun Si,Honglin Li
Designing single-atom catalysts for oxygen reduction reaction (ORR) are fashionable but challenging to boost the zinc-air battery performance. Significantly enhanced ORR activity by manganese (Mn) single-atom catalysts can be achieved by accurately regulating the coordination number of isolated Mn atoms. Theoretical calculations indicate that the single Mn-N 5 sites possess lower free energy barrier and higher oxygen adsorption performance than single Mn-N 4 sites to accelerate the ORR kinetics. Target to it, here we synthesize an atomically dispersed Mn-N 5 catalyst by precisely axial coordination of pyridinic-N doped into two-dimensional (2D) porous nanocarbon sheets (∼3.56 nm thickness), which reveals outstanding catalytic activity and ultrahigh stability for the ORR in zinc-air battery owing to the inhomogeneous charge distribution of Mn-N 5 sites compared to the conventional single-site Mn-N 4 catalyst and Pt/C. This work gives a new strategy for in situ regulating the electronic structure of metal single-atoms and further promoting the overall ORR performance in energy systems.
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
产品关联
DOI
高影响因子
Energy Technology
·
2022
·Vol. 10
·期 11
·2200602
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IF 4.149
Xiaoran Zhu,Jianze Zhang,Yan Wang,Mingsheng Yang,Haiping Yu,Tengfei Li,Mingjun Hu,Jun Yang
It remains a challenge to achieve high-performance, low-cost, and robustly durable Fe, N co-doped carbon-based oxygen reduction reaction (ORR) catalysts with abundantly accessible Fe–N X sites. Herein, a novel scheme is designed to enrich the pore structure, increase the specific surface area, and generate spatially isolated Fe–N X sites of the ORR catalyst, in which pyridine nitrogen-rich lamellar metal–organic complex (Fe–tetrapyridophenazine) is employed as the precursor and 2D graphitic carbon nitride (g-C 3 N 4 ) as additional nitrogen source for achieving synergistic nitrogen-doping effect. The introduction of g-C 3 N 4 not only ameliorates the nitrogen coordination environment of metal active centers of the composite, but also increases the specific surface area and improves the pore structure. The resultant Fe–NC&CN composite has abundant active sites as well as remarkable electrical conductivity and suitable pore size for electron transfer and reactant diffusion. As expected, the catalyst exhibits excellent ORR activity, driving the reaction with low overpotential ( E 1/2 = 0.879 V) and remaining stable over a long reaction time (93% for 60 000 s), better than commercial Pt/C (20%) in all aspects. The assembled Zn–air battery exhibits high open-circuit voltage of 1.566 V and high specific capacity of 815 mAh g Zn −1 , as well as stable and persistent discharge performance.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
·
IF 9.9
Feng-Di Tu,Zi-Yun Wu,Pan Guo,Li-Xiao Shen,Zi-Yu Zhang,Yun-Kun Dai,Miao Ma,Jing Liu,Bin Xu,Yun-Long Zhang,Lei Zhao,Zhen-Bo Wang
Platinum group metal (PGM)-free catalysts represented by nitrogen and iron co-doped carbon (Fe-N-C) catalysts are desirable and critical for metal-air batteries , but challenges still exist in performance and stability. Here, cerium oxides (CeO x ) are incorporated into a two-dimensional Fe-N-C catalyst (FeNC-Ce-950) via a host-guest strategy. The Ce 4+ /Ce 3+ redox system creates a large number of oxygen vacancies for rapid O 2 adsorption to accelerate the kinetics of oxygen reduction reaction (ORR). Consequently, the as-synthesized FeNC-Ce-950 catalyst exhibits a half-wave potential ( E 1/2 ) of 0.921 V and negligible decay (<2 mV for Δ E 1/2 ) after 5,000 accelerated durability cycles, significantly outperforming most of ORR catalysts reported in recent years and precious metal counterparts. When applied in a zinc-air battery, it demonstrates a peak power density of 175 mW cm −2 and a specific capacity of 757 mAh g Zn −1 . This study also provides a reference for the exploration of Fe-N-C catalysts decorated with variable valence metal oxides .
研究领域:
材料科学
·
电化学
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能源存储与转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Xiaoyan Zeng,Yongfa Huang,Tingzhen Li,Zheng Lian,Ren Zou,Xinwen Peng
As a wood containing many ordered cell cavities and blood vessels, eucalyptus is an ideal precursor material in preparing hierarchical porous carbon electrodes for Zn-air batteries. However, insufficient micro-mesoporous and minor active sites inhibit the application of wood-directly derived carbon materials in Zn-air batteries. Hence, a simple and cost-effective formic acid pretreatment method was proposed to prepare nitrogen-doped bulk phase catalysts with abundant micro-mesoporous and enough high active sites from eucalyptus. Formic acid pretreatment selectively removed part of lignin and hemicelluloses , thus generating abundant nanopores and contributing to the introduction of more nitrogen active sites. Moreover, the obtained bulk carbon had high mechanical strength and wonderful electrical conductivity, containing cross-linked networks and natural ion transport channels. Benefiting from the above advantages, the bulk carbon catalyst could be directly used as self-supported cathode, and the resulting Zn-air batteries achieved a long cycle life of more than 300 h. This work provides a simple and feasible method for the development of biomass-derived hierarchical bulk-phase porous carbons for energy-related applications.
研究领域:
材料科学
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能源工程
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生物质利用
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
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2023
·Vol. 11
·期 15
·8202-8212
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IF 11.9
Feng-Yi Zheng,Ruisong Li,Shibo Xi,Fei Ai,Jike Wang
Iron-based catalysts have demonstrated fascinating activities in the oxygen reduction reaction (ORR), especially due to the synergistic effect between atoms and clusters, but challenging for further improvement. Herein, a strategy is developed to optimize the catalyst with nitrogen-coordinated Fe single atoms (SAs) and closely surrounding Fe atomic clusters (ACs) towards efficient ORR. The FeSA/FeAC-NC 900 delivers excellent ORR activity with half-wave potential (E1/2) in both acidic (0.80 V) and alkaline (0.90 V) media, as well as superior stability. Theoretical calculations further reveal that the synergistic effects of Fe-based SAs and ACs along with porous structures can decrease the overall energy barrier in the ORR process. Besides, the FeSA/FeAC-NC 900-based zinc–air battery manifests a high peak power density (214.3 mW cm−2) and a high-specific capacity (773.6 mA h g−1). This work provides a new perspective to highly optimize the synergistic interaction of SAs and ACs for boosting activity and energy storage.
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 COLLOID AND INTERFACE SCIENCE
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2023
·
IF 9.9
Quan Zhang,Kang Lian,Qian Liu,Gaocan Qi,Shusheng Zhang,Jun Luo,Xijun Liu
High entropy alloys (HEAs) are those metallic materials that consist of five or more elements. Compared with conventional alloys, they have much more catalytic active sites due to unique structural characteristics such as high entropy effect and lattice distortion, endowing them with promising applications in the region of hydrolysis catalysts. Herein, we successfully loaded high-entropy alloys onto carbon nanotubes (FeNiCoMnRu@CNT) by hydrothermal means. It exhibits excellent HER and OER properties in alkaline seawater. To accomplish two-electrode total water splitting when constructed into Zn air cells, it only needed 1.6 V, and the timing voltage curve showed a steady current density of 10 mA cm −2 during constant electrolysis for more than 30 h in alkaline seawater. The remarkably high HER and OER activity of FeNiCoMnRu@CNT HEAs NPS indicates the potentially broad application prospect of HEAs for Zn air battery.
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
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 10
·3091-3102
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IF 7
Jianping Liu,Guijun Li,Chuanlan Xu,Hongdian Chen,Rong Jin,Lingtao Sun,Chenyang Shu,Haifeng Chen,Chaozhong Guo,Honglin Li,Yujun Si
Non-precious metal Fe–N–C materials are considered one of the promising substitutes for the Pt/C catalyst toward the oxygen reduction reaction (ORR). However, they still suffer from rapid stability reduction caused by the severe Fenton reaction in the ORR process. Here we report a supramolecular-gel-pyrolysis (SGP) method to design a non-noble CeO2/Ce-N–C composite with a hierarchically porous carbon sheet-network structure, serving as an efficient Ce single-atom-site (Ce-N4O4) catalyst for the ORR in a zinc–air battery (ZAB). The prepared catalyst displays comparable ORR catalytic activity and stability to those of Pt/C in an alkaline electrolyte. The corresponding ZAB tests also show a higher energy density and better long-term cycling durability. Theoretical calculations indicate that the enhanced ORR activity may be attributed to the fact that the presence of oxygen vacancies and the Ce-N4O4|CeO2 coupling sites can largely favor the chemical adsorption and activation of O2. This work provides a new avenue for exploring rare-earth metal single-atom ORR electrocatalysts with coupled ORR catalytic sites.
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
CHEMICAL PHYSICS LETTERS
·
2023
·
IF 2.8
Bo Li,Mohib Ullah Khan,Cheng Qv,Lin Chen,Ying Xiong,Lixin Zhang,Mingzai Wu
Conventional flexible zinc-air batteries (ZABs) electrolytes are mainly made of hydrogels, and thus can freeze at low temperatures and cause cell failure. Here, we report a gel electrolyte consisting of agar, polyacrylamide and dimethyl sulfoxide with high ionic conductivity (24 mS cm −1 ) at −30 °C. The flexible ZABs based on this gel electrolyte showed good cycling stability (45 h) at −30 °C, which provides a new idea for the development of low-temperature resistant flexible ZABs.
研究领域:
能源材料
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电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Lufa Yang,Shuai He,Zongyi Shang,Jie Zou,Yaoyue Yang,Zhigang Zhao,Dan Xiao,Caixia Zhou
The Zn-Ag and Zn-Ag/air hybrid batteries are challenged by the low conductivity and capacity of Ag electrode materials. How to further optimize and tune the surface electronic structure of Ag nanomaterials has become an important topic in the improvement of Ag electrode materials. Herein, the silver nanobelts (Ag NBs) materials were prepared by a fast and simple redox replacement reaction. The special nanobelts structure, with the key surface features of the gully-like morphology, raised Ag mounds and superlattice fringes, are beneficial to tune the surface electron structure and thereby increase the conductivity and electrochemical performance of Ag NBs. As a consequence, the assembled Zn-Ag battery exhibits favorable electrochemical performance in view of the specific capacity of 380.9 mAh g Ag −1 . In addition, the hybrid Zn-Ag/air battery shows two-step voltage plateaus of 1.83 and 1.55 V in the Zn-Ag reaction, as well as a voltage plateau of 1.23 V corresponding to the Zn-air reaction. The hybrid battery maintains a high energy efficiency of 76.9% and high rate capabilities, demonstrating an excellent energy-saving feature of this battery. The insights gained from this work may be beneficial for designing the highly-efficient Ag catalysts for electrochemical energy storage.
研究领域:
材料科学
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能源存储
·
电化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
·
IF 8.3
Zihao Xie,Qian Yang,Xiaomin Xu,Deqing He,Yongning Yi,Hao Qiu,Huangang Shi,Yingping Pang,Wei Wang,Chao Su
The main obstacle in the commercial application of aqueous zinc-air batteries (ZABs) are emerging viable, sustainable, and safe alternatives in electrochemical energy conversion technologies. However, the practical realization of ZABs is impeded by four-electron oxygen evolution (OER) and reduction reactions (ORR) and their sluggish kinetics. Herein, we propose a niobium and fluorine co-doping strategy to regulate in situ Ba and Sr exsolution, inducing the formation of amorphous/crystalline Ba 0.6 Sr 0.4 Co 0.8 Fe 0.2 O 3-δ heterointerfaces with an alkali treatment. Associated with the formation of a low valence state of cobalt, an abundant oxygen defects, and amorphous/crystalline feature, the catalyst enables enhanced oxygen binding energy in the OER and ORR activities. The optimized bifunctional perovskite oxide (BSCFeN-F al ) catalysts present an excellent oxygen electrocatalytic activity and stability, with much lower OER and ORR overpotentials than other perovskite oxides in this work and with negligible performance decay in accelerated durability testing. When used as an air-electrode, the BSCFeN-F al demonstrates excellent performance, achieving high power density and remarkable cycling stability. This work highlights the essential function of the heterostructure interface in oxygen electrocatalysis, opening a new avenue to advanced neutral metal-air batteries.
研究领域:
材料科学
·
电化学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 10
·2251
·
IF 3.2
Linxiang Zhou,Chaoyang Shi,Huaqi Wang,Danyang Wei,Haodong Jin,Haoqi Li,Zhiwei Meng,Mingli Xu
Developing efficient and durable non-precious metal catalysts for oxygen electrocatalysis in fuel cells and zinc–air batteries remains an urgent issue to be addressed. Herein, a bimetallic CoCe-NC catalyst is synthesized through pyrolysis of Co/Ce co-doped metal–organic frameworks (MOFs), retaining the inherently high surface area of MOFs to maximize the exposure of Co-N and Ce-N active sites. The electronic interaction between Co and Ce atoms effectively modulates the adsorption/desorption behavior of oxygen-containing intermediates, thereby enhancing intrinsic catalytic activity. In alkaline media, the CoCe-NC catalyst exhibits E1/2= 0.854 V electrocatalytic capability comparable to commercial Pt/C, along with superior methanol resistance and durability. Notably, CoCe-NC demonstrates an overpotential 84 mV lower than Pt/C at 300 mA cm−2in a GDE half-cell. When the catalyst is employed as a cathode in zinc–air batteries, it demonstrates an open-circuit voltage of 1.47 V, a peak power density of 202 mW cm−2, and exceptional cycling durability.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xiaohong Sun,Jinhui Zhang,Xueyan Li,Qinglu Peng,Xuliang Yang,Qingju Liu,Longzhou Zhang
The inherent trade-off between mechanical robustness and ionic transport efficiency in gel electrolytes has posed a long-standing challenge for advancing solid-state zinc-air batteries. Conventional approaches struggle to reconcile micron-scale pores (essential for mechanical reinforcement) with macroporous networks (critical for rapid ion migration). In this study, a novel strategy was employed to introduce micropores onto the skeleton of a macroporous gel. The X-ray tomography reveals this secondary structure for the first time. The zinc-air battery assembled by this gel exhibit the high ion conductivity of 205 mS cm −1 and undertake a stress of 984 Kpa. Additionally, the lifetimes of button cell and flexible Zinc-air battery reach 120 h and 97 h respectively.
研究领域:
材料科学
·
能源工程
✓ 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）