JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Tianyan Lan,Hongmei Du,Yunwu Li,Konggang Qu,Jinsheng Zhao,Xianxi Zhang,Yunyun Dong,Yan Zhang,Xueyue Zhang,Danyang Zhang
The development of bifunctional electrocatalysts to reduce the polarization loss is essential to enhance the performance of Zn-air batteries. The combination of metal-organic frameworks (MOFs) with metal or metallic compounds provides a way to integrate their merits and effectively improve their electrocatalytic performances. However, previous synthesis of MOFs/metal oxides usually involves high-temperature calcination , which makes it difficult to control their morphologies. In this work, through a ligand-insufficient and high temperature controlled solvothermal reaction, innovative NiFe-MOF/NiFe 2 O 4 hollow nanospheres were one-pot prepared without using any shape-controlled agent or calcination process. The as-obtained NiFe-MOF/NiFe 2 O 4 shows better ORR and OER performance than pure NiFe-MOF and NiFe 2 O 4 , suggesting a synergetic effect between NiFe-MOF and NiFe 2 O 4 . The maximum power density of the liquid Zn-air battery assembled using NiFe-MOF/NiFe 2 O 4 as the air electrode catalyst is 158.4 mW cm −2 at 246.1 mA cm −2 . This work offers fresh thoughts into designing highly efficient MOF-derived electrocatalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Sustainability
·
2022
·Vol. 14
·期 20
·13417
·
IF 3.889
Pingshu Leng,Hanbin Wang,Binfeng Wu,Lei Zhao,Yijing Deng,Jinting Cui,Houzhao Wan,Lin Lv
The use of transition metals as bifunctional catalysts for rechargeable zinc-air batteries has recently attracted much attention. Due to their multiple chemical valence states, the cobalt oxides are considered to be promising catalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). In this work, bifunctional Ag-decorated Co3O4-nitrogen doped porous carbon composite (Co3O4-NC&Ag) catalysts were synthesized by annealing ZIF-67 in N2and O2, respectively, followed by Ag deposition using chemical bath deposition. Due to the decoration of Ag nanoparticles and high specific surface area (46.9 m2g−1), the electrochemical activity of Co3O4increased significantly. The optimized Co3O4-NC&Ag catalysts possessed superior ORR performance with a half-wave potential of 0.84 V (vs. RHE) and OER activity with an overpotential of 349 mV at 10 mA cm−2. The open circuit voltage of the Co3O4-NC&Ag-based zinc-air battery was 1.423 V. Meanwhile, the power density reached 198 mW cm−2with a specific discharge capacity of 770 mAh g−1at 10 mA cm−2, which was higher than that of Pt/C-based zinc-air battery (160 mW cm−2and 705 mAh g−1). At a current density of 10 mA cm−2, the charge-discharge performance was stable for 120 h (360 cycles), exhibiting better long-term stability than the Pt/C&RuO2counterpart.Keywords:zinc air battery;Co3O4;bifunctional catalysts;silver decoration
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Qiusheng Zhou,Yuan Tian,Mingyuan Wang,Shuangying Lei,Chuanyin Xiong
The earth-abundant, low-cost, and efficient oxygen electrode materials offer a potential opportunity to satisfy the large-scale production and application of metal-air batteries. Herein, a molten salt-assisted strategy is developed to anchor transition metal-based active sites via in-situ confining into porous carbon nanosheet. As a result, a chitosan-based porous nitrogen-doped nanosheet decorated with the well-defined CoN x (CoN x /CPCN) was reported. Both structural characterization and electrocatalytic mechanisms demonstrate a prominent synergetic effect between CoN x and porous nitrogen-doped carbon nanosheets forcefully accelerates the sluggish reaction kinetics of oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Interestingly, the Zn-air batteries (ZABs) equipped with CoN x /CPCN-900 as an air electrode shows outstanding durability for 750 discharge/charge cycles, a high power density of 189.9 mW cm −2 , and a high gravimetric energy density of 1018.7 mWh g −1 at 10 mA cm −2 . Furthermore, the assembled all-solid cell displays exceptional flexibility and power density (122.2 mW 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
产品关联
DOI
PubMed
高影响因子
CARBON
·
2021
·
IF 9.594
Chao Zhang,Huifeng Dong,Binling Chen,Tianxu Jin,Jun Nie,Guiping Ma
The development of bifunctional activity and long durability of ORR/OER catalyst is vital for realizing the practical application of Zn–air batteries (ZAB). Herein, 3D-structured bifunctional catalysts , CoFe nanoalloy decorated carbon nanotubes (CNT) anchoring with 2D MXene (Fe/Co-CNT@MXene-T), were prepared and fabricated as the cathode for both aqueous and flexible ZAB. Taking advantages of active sites of CoFe nanoparticles , robust sheath and fast charge transfer provided by CNT and MXene, our optimal catalyst Fe/Co-CNT@MXene-8 exhibited remarkable electroactivities of ORR and OER comparable with the benchmark Platinum carbon (Pt/C) and Ruthenium dioxide (RuO 2 ), respectively. The as-assembled aqueous ZAB with Fe/Co-CNT@MXene-8 as cathode exhibited a high specific capacity of 759 mA h g −1 at a current density of 10 mA cm −2 , and a stable voltage platform in the quick discharge–charge test under a 375h long-lasting operation, superior to those assembled with benchmark commercial catalyst and other reported catalysts. Furthermore, the as-assembled flexible ZAB with Fe/Co-CNT@MXene-8 as cathode also presented excellent durability cycling and showed promising perspectives as future power sources for wearable application. Such high performance was also verified by X-ray absorption near-edge structure (XANES) and supported by density functional theory (DFT) calculation. This work provides a novel view to design highly effective and long-lasting rechargeable ZABs.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Mengxia Shen,Qingqing Liu,Jiaojiao Sun,Chanjuan Liang,Chuanyin Xiong,Chen Hou,Jianfeng Huang,Liyun Cao,Yongqiang Feng,Zhen Shang
Single-atom catalysts (SACs), with precisely controlled metal atom distribution and adjustable coordination architecture, have gained intensive concerns as efficient oxygen reduction reaction (ORR) electrocatalysts in Zn-air batteries (ZAB). The attainment of a monodispersed state for metallic atoms anchored on the carbonaceous substrate remains the foremost research priority; however, the persistent challenges lie in the relatively weak metal-support interactions and the instability of captured single atom active sites. Furthermore, in order to achieve rapid transport of O 2 and other reactive substances within the carbon matrix, manufacturing SACs based on multi-stage porous carbon substrates is highly anticipated. Here, we propose a methodology for the fabrication of carbon aerogels (CA)-supported SACs utilizing papermaking nanofibers , which incorporates advanced strategies for N -atom self-doping, defect/vacancy introduction, and single-atom interface engineering. Specifically, taking advantages of using green and energy-efficient feedstocks, combining with a direct pore-forming template volatilization and chemical vapor deposition approach, we successfully developed N -doped carbon aerogels immobilized with separated iron sites (Fe-SAC@N/CA-Cd). The obtained Fe-SAC@N/CA-Cd exhibited substantially large specific surface area (S BET = 1173 m 2 /g) and a multi-level pore structure, which can effectively mitigate the random aggregation of Fe atoms during pyrolysis. As a result, it demonstrated appreciable activity and stability in catalyzing the ORR progress (E 1/2 = 0.88 V, E onset = 0.96 V). Furthermore, the assembled liquid electrolyte-state Zn-air batteries (LES-ZAB) and all-solid-state Zn-air battery (ASS-ZAB) also provides encouraging performance, with a peak power density of 169 mW cm −2 for LES-ZAB and a maximum power density of 124 mW cm −2 for ASS-ZAB.
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
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2025
·
IF 4.1
Xiao Li,Xue-wei Wang,Xiao-Ran Wen,Shi-qi Li,Kun Zhang,Jia-cheng Yu,Yan Guo
Mn-based mullite, with its unique structure featuring two distinct Mn coordination environments, has garnered significant attention in the research and development of oxygen reduction reaction (ORR) catalysts. The nucleation and growth of SmMn 2 O 5 were influenced by controlling the hydrothermal reaction time and temperature, resulting in SmMn 2 O 5 with varying degrees of crystallinity. With the increase of hydrothermal temperature and time, the crystallinity of SmMn 2 O 5 is enhanced, and the morphology changes from an amorphous lamellar structure to a finer and longer nanorod structure. SmMn 2 O 5 with an amorphous lamellar structure prepared at 150 °C for 3 h has a maximum specific surface area of 355.35 m 2 g −1 . The electrochemical results indicate that the amorphous lamellar SmMn 2 O 5 shows excellent ORR performance with a half-wave potential of 0.76 V. This is mainly due to the fact that crystallinity induces an increase in the number of oxygen vacancies, which increases the number of active sites and changes the valence state of Mn. The amorphous lamellar SmMn 2 O 5 was used as a cathode in zinc-air batteries with a power density of 119 mW/cm 2 , showing potential applications. This work demonstrates an effective and simple strategy for increasing the number of oxygen vacancies in SmMn 2 O 5 , which helps the development and application of SmMn 2 O 5 in the field of electrocatalysis.
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
ChemCatChem
·
2024
·
IF 3.8
Ke Wan,Zhi Li,Yangfan Sun,Xin Zhang,Jiayi Fang,Qingshan Li,Yuanna Sun,He Miao
Graphical Oxygen vacancies were introduced into the perovskite LaMnO 3 using a carbon reduction process. LaMnO 3 was mixed with conductive carbon black in a 3:1 mass ratio, then heated at 500 °C for 2 h under an Ar atmosphere and allowed to cool naturally. The resulting novel composite material, LMOC-500, exhibited excellent catalytic activity and stability for the oxygen reduction reaction. Zinc-air batteries (ZABs) have garnered significant attention due to their high theoretical energy density, safety, and environmental sustainability. However, the slow oxygen reduction reaction (ORR) kinetics at the cathode remains a major challenge for improving ZAB performances. In this study, ABO 3 -type perovskite transition metal oxides, particularly LaMnO 3 , are explored as potential nonprecious metal catalysts to address these limitations. In this work, the LaMnO 3 catalyst was prepared using the sol-gel method, and oxygen vacancies were introduced through a novel carbon reduction approach using conductive carbon black as the reducing agent. The catalyst was reduced at different temperatures to optimize its ORR activity. The 500 °C-reduced sample (LMOC-500) shows the superior catalytic performances, achieving an onset potential of 0.937 V versus RHE and a half-wave potential of 0.824 V versus RHE. The optimized material also exhibited excellent stability in long-term discharge tests in ZAB applications, demonstrating its potential application as the ORR catalyst for ZABs.
研究领域:
材料科学
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电化学
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能源科学
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
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2024
·
IF 5.4
Fancheng Meng,Peng Chen,Shulin Li,Na Cao,Sheng Cheng,Xiangfeng Wei,Jiangtao Di,Jiehua Liu
Compared with the rapidly developing lithium- and sodium-ion batteries, zinc-air batteries (ZABs) offer the advantages of safety and high energy density. Nevertheless, their applications in underwater conditions are currently limited due to the low oxygen levels in such environments. Drawing inspiration from fish gills, we have successfully constructed a self-breathing zinc-air battery (ZAB) that can extract dissolved oxygen from water and convert it to electrical energy. By utilizing a Co2Fe-NC catalyst and a large-window cathode, the ZAB demonstrates a continuous discharge duration of 68.6 h in the underwater condition, thanks to its well-engineered architecture, optimized catalyst, and gas diffusion layer. Meanwhile, the underwater ZAB outperforms fish gills as it also operates efficiently in air, exhibiting a high capacity of 740 mA h g–1 and a high power density of 320 mW cm–2. Additionally, prolonged cycling tests indicate the ZAB’s capability for stable charging and discharging with minimal potential variation. This study introduces an innovative approach to the development of breathable underwater metal–air batteries.
研究领域:
材料科学
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能源技术
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2019
·Vol. 29
·期 33
·1902875
·
IF 15.621
Zhichao Wang,Wenjia Xu,Xiaokang Chen,Yanhua Peng,Yanyan Song,Chunxiao Lv,Hongli Liu,Junwei Sun,Ding Yuan,Xiyan Li,Xiangxin Guo,Dongjiang Yang,Lixue Zhang
Heteroatom doping plays a significant role in optimizing the catalytic performance of electrocatalysts. However, research on heteroatom doped electrocatalysts with abundant defects and well-defined morphology remain a great challenge. Herein, a class of defect-engineered nitrogen-doped Co 3 O 4 nanoparticles/nitrogen-doped carbon framework (N-Co 3 O 4 @NC) strongly coupled porous nanocubes, made using a zeolitic imidazolate framework-67 via a controllable N-doping strategy, is demonstrated for achieving remarkable oxygen evolution reaction (OER) catalysis. X-ray photoelectron spectroscopy, X-ray absorption fine structure, and electron spin resonance results clearly reveal the formation of a considerable amount of nitrogen dopants and oxygen vacancies in N-Co 3 O 4 @NC. The defect engineering of N-Co 3 O 4 @NC makes it exhibit an overpotential of only 266 mV to reach 10 mA cm −2 , a low Tafel slope of 54.9 mV dec −1 and superior catalytic stability for OER, which is comparable to that of commercial RuO 2 . Density functional theory calculations indicate N-doping could promote catalytic activity via improving electronic conductivity, accelerating reaction kinetics, and optimizing the adsorption energy for intermediates of OER. Interestingly, N-Co 3 O 4 @NC also shows a superior oxygen reduction reaction activity, making it a bifunctional electrocatalyst for zinc–air batteries. The zinc–air battery with the N-Co 3 O 4 @NC cathode demonstrates superior efficiency and durability, showing the feasibility of N-Co 3 O 4 /NC in electrochemical energy 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
Nanoscale
·
2017
·Vol. 9
·期 47
·18977-18982
·
IF 7.367
Yafei Cheng,Fan Liao,Wen Shen,Liangbin Liu,Binbin Jiang,Yanqing Li,Mingwang Shao
Excellent performance and multifunctional electrocatalysts are of great importance for the development of renewable energy. Here, a multifunctional carbon cloth supported cobalt phosphide (CoP@CC) electrocatalyst was synthesized via a simple electrochemical deposition followed by subsequent phosphorization. This self-standing CoP@CC presents superior HER performance in both acid and alkaline media and excellent OER activity in an alkaline environment. When applied as both anode and cathode catalyst to overall water splitting, CoP@CC only required a low cell voltage of 1.68 V to drive a current density of 10 mA cm−2, making this catalyst a potential candidate in industrial application. Moreover, inspired by its satisfying ORR activity, CoP@CC was first used as the air-electrode in zinc–air batteries, which outputted an open-circuit potential of 0.6 V and a power density of ∼30 mW cm−2.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Xuedong He,Yujian Zhang,Juan Wang,Jun Li,Lianghao Yu,Feng Zhou,Juan Li,Xiaojun Shen,Xin Wang,Shun Wang,Huile Jin
Metal compounds encapsulated in carbon materials exhibit promising properties as potential oxygen electrocatalysts. Herein, we first report Fe2N@C derived from the biomass bioaccumulation doping method, which offers a new perspective for exploring oxygen reduction reaction (ORR) electrocatalysts with low cost and high performance. The Fe2N@NCNTs prepared with our biodoping method display excellent ORR activity with a low half-wave potential (E1/2) and long-term stability in a broad pH range. More importantly, a zinc–air battery (ZAB) constructed with Fe2N@NCNTs’ catalysts exhibits a high open-circuit voltage (1.53 V), high peak power density (135 mW cm–2), and excellent stability (over 200 h). The significantly improved ORR performance can be attributed to the high N-doping level and its hierarchically porous structure. This work offers a path for the development of ORR catalysts for environmental governance and efficient energy conversion.
研究领域:
材料科学
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能源科学
·
环境科学
✓ 已验证
DOI
高影响因子
Batteries-Basel
·
2022
·Vol. 8
·期 12
·259
·
IF 5.938
Kaixin Li,Zhanhua Dong,Zhe Lü
The development of robust and efficient electrocatalysts for use in fuel cells and metal–air batteries has garnered a great deal of interest due to the quest for clean and renewable energy sources. In this paper, a promising Co-doped Pr0.5Ba0.4Ca0.1Fe1-xCoxO3-δ(x = 0, 0.2, 0.4, 0.6, 0.8; denoted as PBCFC-x, x = 0, 2, 4, 6, 8) with enhanced durability and electrocatalytic ORR/OER activity for zinc–air battery cathode catalysts is presented. Particularly, PBCFC-6 exhibits the best bifunctional catalytic activity in alkaline media among several materials, according to research using the RDE. The zinc–air battery with PBCFC-6 as the cathode catalyst delivered the smallest discharge–charge voltage difference at the current density of 10 mA·cm−2and only increased by 0.031 V after 220 cycles (220 h), demonstrating its superior bifunctional catalytic activity and durability. The optimized electrochemical performance of both OER and ORR as well as stability in zinc–air batteries might result from the higher electrical conductivity, increasing concentration of adsorbed oxygen, and the greater proportion of Fe4+(t2g3eg1) with optimal electron occupancy, owing to the partial replacement of Fe with Co.Keywords:Pr0.5Ba0.4Ca0.1Fe1-xCoxO3-δ;rechargeable zinc–air batteries;ORR/OER;bifunctional catalyst
研究领域:
材料科学
·
电化学
·
能源技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）