ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Qingyu Li,Tong Zhao,Caimei He,Yezheng Cai,Qiang Wu,Youguo Huang,Kui Liu,Zhaoling Ma,Hongqiang Wang
The designed synthesis of hollow carbon chamber catalysts is central for accelerating the oxygen reduction reaction (ORR) electrocatalysis, which is the core process of renewable metal-air batteries. Nevertheless the positive effect of hollow carbon cavities on the actual ORR electrocatalysis in alkaline and neutral medium is still underexplored. Herein, manganese-decorated zeolite imidazolate frameworks coated with polydopamine (PDA) was pyrolyzed to form the hollow and macroporous carbon cavities decorated with highly dispersed manganese-nitrogen moieties (Mn-NC). The hollow carbon cavities with spacious microchemical environment can maximize the amount of atomically active sites and provide convenient mass transfer channels, cooperatively boosting the alkaline and neutral ORR via an efficient close to four-electron pathway. As result, the hollow Mn-NC exhibited much enhanced catalytic capability than Mn-C synthesized without polydopamine coating in both alkaline and neutral electrolyte. When utilized as a cathode catalyst, the homemade zinc-air battery (ZAB) and magnesium-air battery (MAB) driven by Mn-NC displayed higher peak power density and longer stable discharge time than those driven by commercial Pt/C catalyst, along with robust rate performance, showing appreciable application potential. This work may inspire more study on rational design and synthesis of hollow catalysts with boosted ORR electrocatalysis for efficient energy conversion devices including fuel cells and other metal-air batteries and beyond.
研究领域:
材料科学
·
电化学
·
能源转换技术
✓ 已验证
产品关联
DOI
高影响因子
Small Methods
·
2025
·
IF 9.1
Xiaofeng Lei,Menglin He,Pingli Wu,Chao Ma,Xu Liu,Chongyan Yao,Wenfeng Cui,Qingxu Zhang,Caicai Li,Huiqiao Li,Xizheng Liu
The stabilization of metallic-Na anodes by the fabrication of a mechanically stable solid-electrolyte interphase (SEI) can enable the construction of stable Na-air batteries (NABs) that can be used as practicable energy-storage devices in ambient air. This study reports in situ fabrication of air-stable Na anodes protected by SEI films for stable NABs. The regulation of anions in the electrolyte generated hierarchically layered SEI on Na anodes; the sequential deposition of inorganic salts and organic components is modulated by controlling the competitive reduction of salt and solvent molecules on the Na surface. Metallic-Na anodes with hierarchical SEI comprising an outer salt-rich and inner organic-component-rich layer showed highly reversible stripping/plating. The high stability of the SEI layer in ambient air can be attributed to synergism between its hydrophilic inorganic and hydrophobic organic components. NABs with hierarchical-SEI-modified Na anodes showed stable cycling for >1900 h in ambient air. This study can guide the design of stable metallic anodes and facilitate the future development of diverse Na-based rechargeable batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBON
·
2021
·
IF 9.594
Qi Huang,Yuwei Xu,Yuanyuan Guo,Linjie Zhang,Yue Hu,Jinjie Qian,Shaoming Huang
To meet the increasing energy demand, the research and development of efficient and clean fuel cells and metal-air batteries are of great significance. Under these circumstances, these hierarchically porous carbon nanomaterials obtained by pyrolysis of coordination polymers are regarded as excellent oxygen reduction catalysts and are expected to be used as air cathode materials . Herein, a type of 2-dimensional structure of InOF-26 has been thermally converted into ultrathin graphitized nitrogen-doped carbon nanosheets , denoted as NG-CNS. During the carbonization , the addition of ferric chloride assists in breaking the intermolecular forces between crystal structures, which is further conducive to the formation of carbon nanosheets with an improved graphitization degree. Meanwhile, the subsequent ammonia impregnation together with secondary calcination can readjust the coordination environment of nitrogen species in the carbonaceous matrix. The obtained product of NG-CNS exhibits excellent ORR performance with a high half-wave potential of 0.80 V, a large diffusion-limited current density of 6.00 mA cm −2 , a small Tafel slope of 57.3 mV dec −1 , to show unexpected practicability in Zn-air battery and Al-air battery. The relatively simple synthetic procedure, low cost, high repeatability, and satisfactory electrochemical performance of NG-CNS will provide a direction for the facile preparation of coordination polymer-derived carbon nanomaterials in energy storage and conversion applications.
研究领域:
材料科学
·
能源化学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xiangsi Wu,Zhiqiang Zhang,Caimei He,Yanhao Shen,Xianwen Wu,Hongqiang Wang,Zhaoling Ma,Qingyu Li
As the bifunctional oxygen electrocatalysts, the mixed-valence metal oxide with multiple oxidation state of metal ions usually gives analogous alloy effect. However, the irreversible surface reconstruction of the electrocatalyst during the electrochemical catalysis usually changes the oxidation state of metal ions in the near-face to higher oxidation state especially in the mixed-valence metal oxide. For the modulation equilibrium, we adopt a new approach to prepare the mixed-valence cobalt oxide with the regulatable ratio of Co 2+ /Co 3+ by inducing air at a certain temperature during the cooling procedure. The obtained Co/CoO/Co 3 O 4 /NCS with hollow nanosphere possesses multiple heterointerfaces accompanying rich oxygen vacancies. Together with the contribution of the mixed valence and oxygen vacancies, Co/CoO/Co 3 O 4 /NCS exhibits an exceptional ORR activity with a half-wave potential of 0.844 V and superb OER activity with a low overpotential of 285 mV at 10 mA cm −2 . The as-fabricated Zn-air batteries with Co/CoO/Co 3 O 4 /NCS catalyst exhibit a remarkable open-circuit voltage (1.47 V), a competitive power density of 146.5 mW cm −2 , and good durability without nearly no performance decay for over 400 h at 5.0 mA cm −2 . More attractively, when constructed into Mg-air batteries, Co/CoO/Co 3 O 4 /NCS cathode realizes an excellent stable discharge voltage over 90 h at 20 mA cm −2 .
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 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
Exploration
·
2024
·
IF 0
Qi Gao,Jian Gan,Pixiang Wang,Yuxiang Huang,Daihui Zhang,Wenji Yu
Air pollution is caused by the perilous accumulation of particulate matter (PM) and harmful gas molecules of different sizes. There is an urgent need to develop highly efficient air filtration systems capable of removing particles with a wide size distribution. However, the efficiency of current air filters is compromised by controlling their hierarchical pore size. Inspired by the graded filtration mechanisms in the human respiratory system, microporous ZIF-67 is in situ synthesized on a 3D interconnected network of bamboo cellulose fibers (BCFs) to fabricate a multiscale porous filter with a comprehensive pore size distribution. The macropores between the BCFs, mesopores formed by the BCF microfibers, and micropores within the ZIF-67 synergistically facilitate the removal of particulates of different sizes. The filtration capabilities of PM2.5 and PM0.3 could reach 99.3% and 98.6%, respectively, whereas the adsorption of formaldehyde is 88.7% within 30 min. In addition, the filter exhibits excellent antibacterial properties (99.9%), biodegradability (80.1% degradation after 14 days), thermal stability, and skin-friendly properties (0 irritation). This study may inspire the research of using natural features of renewable resources to design high-performance air-filtration materials for various applications.
研究领域:
材料科学
·
环境工程
·
化学工程
·
生物医学
✓ 已验证
DOI
Journal of Energy Chemistry
·
2019
·
IF 5.162
Zhuoran Zhang,Jianxing Zhang,Yulong Sun,Huanhuan Jia,Linfeng Peng,Yunyang Zhang,Jia Xie
The sulfide solid electrolytes have the characteristics of high ionic conductivity and low grain boundary resistance, which make them suitable for bulk-type all-solid-state batteries. However, most of them suffer from poor stability in air. Here, we explore the air stable sulfide solid electrolytes in Li 4 SnS 4 -Li 3 SbS 4 system. The solid solutions of Li 4– x Sb x Sn 1– x S 4 (0 ≤ x ≤ 0.5) can be formed in Li 4 SnS 4 -Li 3 SbS 4 system. Li 3.8 Sb 0.2 Sn 0.8 S 4 achieves the highest ionic conductivity of 3.5 × 10 −4 S cm −1 in this system, which is 5 times as that of Li 4 SnS 4 and 3 orders of magnitude higher than that of Li 3 SbS 4 , respectively. Li 3.8 Sb 0.2 Sn 0.8 S 4 crystallizes into the same structure with high ionic conductivity phase of β -Li 3 PS 4 . Moreover, Li 3.8 Sb 0.2 Sn 0.8 S 4 owns good stability in humid air . Matching with LiCoO 2 and Li 4 Ti 5 O 12 , Li 3.8 Sb 0.2 Sn 0.8 S 4 exhibits the potential to be applied in all-solid-state batteries.
研究领域:
材料科学
·
电化学
·
固体离子学
·
储能技术
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Nan Wang,Jialin Fu,Xuecheng Cao,Lingling Tang,Xiankai Meng,Zhenyi Han,Linhao Sun,Shuo Qi,Dangsheng Xiong
Li–air batteries have received significant attention for their ultrahigh theoretical energy density. However, the byproducts induced by attacking air hinder the conversion of Li–O 2 batteries to Li–air batteries. Humidity is one of the main obstacles, not only causing side reactions with the discharge products but also leading to rapid corrosion of the lithium anode. Here, we fabricated a novel composite hydrophobic catalyst by loading RuO 2 and graphene on N-doped porous carbon. The catalyst was endowed with hydrophobicity and showed superior catalytic performance and low affinity to water in the air. A Li–air battery equipped with this novel composite catalyst exhibited eminent cycling performance in pure oxygen (over 470 h), humid oxygen [∼40% relative humidity (RH), over 310 h], and ambient air (∼42% RH, over 330 h) at a current density of 500 mA g −1 , and the discharge specific capacity increased from 13122.1 to 19358.6 mAh g −1 .
研究领域:
材料科学
·
电化学
·
能源存储
✓ 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 Materials Chemistry A
·
2020
·Vol. 8
·期 17
·8171-8194
·
IF 11.301
Yuanzhi Li,Shaowen Wu,Jichun Wu,Qianqian Hu,Chongyang Zhou
CO and volatile organic compounds (VOCs) as main air pollutants are discharged in large quantities from various industrial processes. They are not only hazardous to human health, but also harmful to the air environment. Currently, catalytic combustion using supported noble metal catalysts is commercially used for the abatement of air pollutants in various industrial processes due to high catalytic efficiency and long-term durability. The major challenge for catalytic combustion is large energy consumption. Photocatalytic oxidation provides a low energy consumption approach as it utilizes inexhaustible solar energy. The major challenges for photocatalytic oxidation are low catalytic efficiency and prone deactivation. Photothermocatalytic oxidation provides a very promising approach for the abatement of air pollutants. It perfectly combines the advantages of catalytic combustion and photocatalytic oxidation. Photothermocatalytic abatement of air pollutants follows a mechanism of light-driven thermocatalytic oxidation, which is considerably enhanced by a novel photoactivation that is completely different from photocatalysis on semiconductor photocatalysts. This review will discuss the light-driven thermocatalytic oxidation mechanism and the novel photoactivation, and summarize several strategies of designing efficient photothermocatalysts such as nanostructured transition metal oxides, supported noble metal catalysts, nanocomposites of transition metal oxides and semiconductor photocatalysts, and so on.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Biosensors-Basel
·
2022
·Vol. 12
·期 5
·294
·
IF 5.743
Jia Man,Luming Man,Chenchen Zhou,Jianyong Li,Shuaishuai Liang,Song Zhang,Jianfeng Li
Microfluidics devices have widely been employed to prepare monodispersed microbubbles/droplets, which have promising applications in biomedical engineering, biosensor detection, drug delivery, etc. However, the current reported microfluidic devices need to control at least two-phase fluids to make microbubbles/droplets. Additionally, it seems to be difficult to make monodispersed microbubbles from the ambient air using currently reported microfluidic structures. Here, we present a facile approach to making monodispersed microbubbles directly from the ambient air by driving single-phase fluid. The reported single-phase-fluid microfluidic (SPFM) device has a typical co-flow structure, while the adjacent space between the injection tube and the collection tube is open to the air. The flow condition inside the SPFM device was systematically studied. By adjusting the flow rate of the single-phase fluid, bubbles were generated, the sizes of which could be tuned precisely. This facile bubble generator may have significant potential as a detection sensor in detecting viruses in spread droplets or haze particles in ambient air.Keywords:microfluidic device;single-phase fluid;bubbles;air detection
研究领域:
生物医学工程
·
传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
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
·
电化学
·
能源存储与转换
✓ 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）