ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Fang Wang,Haojun Li,Qixing Wu,Jie Fang,Yang Huang,Chunli Yin,Yanghai Xu,Zhongkuan Luo
In this work, we proposed using titanium dioxides (TiO 2 ) with oxygen vacancies (H-TiO 2 ) as cathode catalysts to improve the electrochemical performance of non-aqueous lithium-air batteries. Such H-TiO 2 catalysts were attained by a facile heat treatment of rutile TiO 2 and the existence of vacancies was confirmed by Raman spectra and X-ray photoelectron spectroscopy (XPS). It was demonstrated that due to the presence of defects which can facilitate the adsorption and dissociation of oxygen, the in-house lithium-air battery with H-TiO 2 can be discharged at the current densities of 0.3 and 0.5 mA cm −2 while maintaining the specific capacities of 3.2 and 2.8 mAh cm −2 , respectively, much higher than those of the batteries without catalysts or with pristine rutile TiO 2 . In addition, the cycling test showed that the battery with H-TiO 2 can undergo 400 and 372 cycles, respectively, at the current densities of 0.3 and 0.5 mA cm −2 with a fixed specific capacity of 0.1 mAh cm −2 and a cutoff discharge voltage of 2.0 V.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materiomics
·
2023
·
IF 9.4
Fangze Chen,Dacheng Zhou,Xueqing Xiong,Juntao Pan,Donglin Cai,Ze Wei,Xiyong Chen,Yihui Liu,Nengneng Luo,Jialin Yan,Toyohisa Fujita
A series of single-phase double perovskite Pr 1- x Gd x BaCo 2- y Fe y O 5+ δ ( x = 0, 0.5 and 1, 0 ≤ y ≤ 1) materials were engineered through A/B site co-doping strategy to improve the mechanical, electrical and electrochemical properties as potential cathode materials for the application of intermediate solid oxide fuel cells (IT-SOFCs). The corresponding thermochemical stability, thermal expansion behavior, electrical conductivity and cathodic polarization resistance of the materials were systematically investigated. It was found that the A-site dual lanthanide doped Pr 0.5 Gd 0.5 BaCo 2 O 5+ δ (PGBCO) exhibits improved electrical conductivity, reduced thermal expansion, and comparatively low electrochemical polarization resistance versus single lanthanide double perovskite, PrBaCo 2 O 5+ δ (PBCO) and GdBaCo 2 O 5+ δ (GBCO) materials. Further investigation on the effect of B-site Fe-doping on Pr 0.5 Gd 0.5 BaCo 2- y Fe y O 5+ δ (PGBCF- y , 0 ≤ y ≤ 1) reveals that all the PGBCF- y compositions exhibit excellent chemical stability with Gd-doped ceria (GDC) at operating temperatures not higher than 1 100 °C. Besides, doping of Fe in B-site can effectively reduce the thermal expansion coefficients (TECs) of the Pr 0.5 Gd 0.5 BaCo 2 O 5+ δ ceramics at 30–1 000 °C. And the electrochemical impedance spectra (EIS) results show that the PGBCF- y |GDC| PGBCF- y symmetric cells have acceptable low area specific polarization resistances. Further examination of the cathodic polarization and characteristic capacitance from the AC impedance spectra by employing the relaxation time distribution (DRT) method demonstrated that charge transfer is the dominating sub-process for the oxygen transport through the materials.
研究领域:
材料科学
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燃料电池研究
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Tong Xue,Xiao-Lei Qiao,Jin-Fu Ma,Xiang-Hui Yan,Rui Lv,Feng-Lan Han
In this study, the K 2 NiF 4 -type La 1.8 Sr 0.2 CuO 4 has been hydrothermal synthesized and applied in Mg-air battery. The hydrothermal time and heat treatment temperature of synthesized La 1.8 Sr 0.2 CuO 4 has been discussed. X-ray diffraction (XRD) and scanning electron spectroscopy (SEM) were carried out to demonstrate the crystalline structure and morphology of synthesized materials. The electrochemical impedance and discharge performance were studied to understand the catalytic activities of La 1.8 Sr 0.2 CuO 4 . The La 1.8 Sr 0.2 CuO 4 with active carbon addition (La 1.8 Sr 0.2 CuO 4 /AC) in Mg-air battery was found to hold specific discharge capacity of 962 mAh g -1 at current density of 40 mA cm -2 , which was higher than that of the bulk electrode (i.e.,782 mAh g -1 ). The K 2 NiF 4 -type La 1.8 Sr 0.2 CuO 4 has been proved as a potential candidate for air cathode in Mg-air battery.
研究领域:
材料科学
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电化学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 53
·114327-114335
·
IF 5.8
Zhou Hao,Zhang Dayong,Jiang Yongjun,Zeng Bo,Zhao Chenxi,Zhang Mingjie,Zeng Baiyan,Zhu Xiaoquan,Su Xintai,Romanovski Valentin,Bi Ran
The spent carbon cathode (SCC) is a hazardous solid waste from aluminum production. It has an abundant carbon source and a unique graphitic carbon layer structure, making it a valuable waste for recycling. This paper uses alkaline and acid leaching methods to report a straightforward way of extracting recovered carbon (RC) from SCC as anode material for lithium-ion batteries (LIBs). The results show that alkaline and acid leaching conditions at 70 °C with 1 M NaOH and HCl solution individually in 6 h and a liquid-solid ratio of 20:1 can result in RC with up to 94.63% carbon content than 49.38% in SCC, exhibiting a typical graphite structure. SCC and RC materials are obtained after calcination at 400 °C in an inert atmosphere and used as anode materials (SCC-400 and RC-400). In this paper, The initial charging specific capacities are 490.0 mA h g −1 , 195.4 mA h g −1 , and 423.2 mA h g −1 and initial coulombic efficiencies (ICE) are 67.8%, 78.9%, and 72.0% of RC-400, SCC, and SCC-400. RC-400 also shows excellent capacity retention and impedance values. This exciting finding provides a viable, non-hazardous, and resourceful method for treating and disposing of SCC from aluminum electrolysis.
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2021
·
IF 5.485
Boya Ma,Wenjing Lv,Jinying Li,Chunwei Yang,Qian Tang,Dong Wang
Aniline is a refractory pollutant with high toxicity that will cause pollution if discharged without treatment. However, conventional technology cannot meet the requirements of safe disposal. It is necessary to develop novel treatment technology to address this problem, and the electro-Fenton process could be a solution. In this study, a novel CNT-Ag@Cu cathode was synthesized by Ag doping and multiwall carbon nanotube (CNT) 3D morphology modification of copper foam (CF). The composition, structure and morphology of CNT-Ag@Cu were obtained. The aniline removal rate was over 99% under optimal conditions. The kinetic analysis results indicated that aniline removal followed a pseudo-first-order kinetic law, and the reaction rate constant reached 0.0661 min −1 . The aniline removal rate also reached 99.2% after the CNT-Ag@Cu cathode was used 10 times without further treatment. The CNT-Ag@Cu cathode had an excellent ability to maintain an OH concentration that reached 0.5 μmol/L after 60 min of reaction. Aniline removal is a coupling multimechanism in which Ag loading improves H 2 O 2 generation and the nanoconfinement effect of CNTs promotes accumulation of a high concentration of OH.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 41
·34564-34573
·
IF 3.289
Weiwei Fan,Zhu Sun,Junkai Wang,Jun Zhou,Kai Wu,Yonghong Cheng
The perovskite Sm0.95Ba0.05Fe0.95Ru0.05O3 (SBFR) is investigated to assess its possible use as a potential cathode material for solid oxide fuel cells. SBFR shows good thermal stability and has good chemical compatibility with the yttria-stabilized zirconia (YSZ) electrolyte below 1000 °C. In the oxygen partial pressure (pO2) range of 0.01–0.6 atm, the electrical conductivity of the SBFR sample follows a pO21/6 dependency, attributed to p-type electronic conductor behavior. Polarization resistance (Rp) increases with a decrease in pO2 (n = 0.53) and decreases with an increase in the amplitude of the applied direct current (DC) bias at 800 °C. The Rp values of the SBFR sample on the YSZ electrolyte in symmetrical cells are 0.28, 0.22, 0.15 Ω cm2 at 700, 750 and 800 °C, respectively, and the maximum power density of the YSZ electrolyte-supported single cell with the Ni-YSZ anode and SBFR cathode reaches 465 W cm−2 at 800 °C using pure H2 as a fuel and ambient air as an oxidant.
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
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2021
·Vol. 25
·期 7
·2065-2074
·
IF 2.647
Chen Jingzhou,Wang Xuan,Feng Wangjun,Zhao Wei,Shi Zhaojiao
Lithium-sulfur batteries have become a potential candidate for a new generation of energy storage devices due to their extremely high theoretical capacity, but their shuttle effect and poor conductivity of sulfur and final discharge products hinder their commercial development. In this paper, ZIF-8 material with a large specific surface area was successfully prepared with metallic zinc as the central atom and dimethylimidazole. After sintering at 800 °C, the mesoporous carbon material was obtained, which increased its physical adsorption of sulfur. At the same time, titanium dioxide was coated on the mesoporous carbon material to obtain a core-shell structure with a specific surface area of up to 556.1 m 2 /g. The titanium dioxide coating well inhibits the occurrence of the shuttle effect and at the same time improves the cycle stability of the lithium-sulfur battery. The specific discharge capacity of the battery reaches 1351 mAh/g at 0.1 C.
研究领域:
能源材料
·
电化学储能
·
纳米材料
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Zhihong Du,Xu Dong,Tong Wang,Konrad Świerczek,Hailei Zhao
Fluorine doping in the oxygen sublattice has been previously employed to modify the physicochemical properties of perovskite-type oxides. However, the underlying mechanism responsible for the observed enhancements remains unclear. In this study, we systematically investigate the effects of F-doping on the crystal structure, electronic properties, oxygen ion transport, and electrochemical performance of SrCo 0 · 8 Ti 0 · 2 O 3- x - δ F x cathodes through a combination of experimental and DFT theoretical computation methods. The results indicate that the samples retain a cubic structure, while F-doping reduces the valence state of Co and decreases the oxygen vacancy concentration. Although the thermal expansion coefficients of SCTF x remain unchanged, the electrical conductivity of the F-doped SCTF 0.1 is improved. Partial substitution of F for O effectively increases the oxygen diffusion coefficient and reduces the polarization resistance in the charge transfer process, thereby enhancing the catalytic activity of the SCTF 0.1 cathode. The polarization resistance of SCTF 0.1 is as low as 0.050 Ω cm 2 at 700 °C. Notably, the peak power densities of a full cell with the SCTF 0.1 cathode exhibit a significant boost, particularly at lower temperatures. Theoretical calculations corroborate the experimental findings, demonstrating that F-doping effectively reduces the oxygen migration barrier. Overall, fluorine doping proves to be an effective strategy for optimizing SrCo 0 · 8 Ti 0 · 2 O 3 -based SOC cathodes.
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
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2025
·Vol. 41
·期 2
·333-342
·
IF 3
Lin Huahui,Shen Yu,Wei Li,Song Ran,Wu Fan,Wei Peng,Yang Zhenzhong,Ren Yurong,Qu Ke,Ding Zhengping
Ultra-high nickel layered cathodes (Ni⩾95%) have emerged as prospective candidates for next-generation lithium-ion batteries (LIBs) due to their exceptional specific capacity and cost-effectiveness. However, the commercial application of these cathodes has been hindered by several challenges, including structural instability during cycling, high sensitivity to air, and slow Li + migration. In this research, a one-step modification strategy was developed to simultaneously achieve Mg doping and Li 3 PO 4 layer coating for the ultra-high nickel cathodes. Characterization results demonstrated that Mg doping not only alleviates lattice strain changes during the H2–H3 phase transition (H2: the second hexagonal phase; H3: the third hexagonal phase) but also serves as a structural anchor, preventing Ni 2+ migration and occupation within the Li layer. The Li 3 PO 4 surface coating layer acts as an electrochemical shield, protecting against interfacial side reactions and enhancing the Li + diffusion rate. As a result, the LiNi 0.95 Mn 0.05 O 2 cathode, with both internal and external modifications, demonstrates significant improvement in cycling stability (85.7% capacity retention after 100 cycles) and Li + transport performance (130.6 mA·h·g −1 at 10 C, 1 C=189.6 mA·h·g −1 ), providing a solid foundation for the further development and application of ultra-high nickel cathodes.
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 ENGINEERING JOURNAL
·
2025
·
IF 13.2
Shijie Li,Qi Wang,Yao Chang,Zhenghao Pu,Yi Lu,Yiwa Luo,Zhe Wang,Wei-Li Song,Wei Wang,Shuqiang Jiao,Dongbai Sun
The molten salt electrolysis method has garnered significant attention for titanium extraction. However, the multi-step reduction and disproportionation reactions of titanium ions severely impact the current efficiency of this process. This study investigated the cathodic behavior of titanium ions on liquid lead (Pb) and zinc (Zn) electrodes in fluoride melts using first-principles calculations and electrochemical analysis. The structure of titanium species in the melt and the reduction mechanism of titanium ions on solid molybdenum (Mo), liquid Zn, and Pb electrodes were elucidated through high-temperature in-situ Raman spectroscopy and experimental analysis. Numerical simulations were employed to analyze the electrolysis process, yielding optimal electrolysis parameters such as current density and overpotential. Electrolysis products were examined through experimental electrolysis and X-ray computer microtomography (x-ray μ-CT) reconstruction, validating the numerical simulation results and confirming the optimal electrolysis parameters. These findings provide valuable insights for enhancing the scalability of the molten salt electrolysis method for titanium extraction and purification.
研究领域:
材料科学
·
电化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Hongwei Tang,Mingkun Wang,Juan Xie,Kang Zhang,Pengcheng Su,Xiangyi Zheng,Kexin Wan,Huilong Dong,Jishi Wei,Yihui Li
Layered MnO2 is regarded as one of the most prospective cathode materials for aqueous zinc-ion batteries (AZIBs), yet it is impeded by its inferior conductivity and the poor cycling stability caused by the manganese dissolution. Herein, a facile alkali-metal-ion intercalation strategy is proposed, where sodium ion and potassium ion are adopted to verify the universality of the alkali-metal-ion intercalators in promoting the zinc-ion storage capability of MnO2. The intercalated alkali-metal ions could not only effectively promote the structural stability by serving as pillars but also improve the conductivity by modulating its electronic structure. Moreover, the extra oxygen defects are introduced during the intercalation of alkali-metal-ion “pillars”, which is conducive to the mitigation of manganese dissolution by regulating the Mn–O bond and acceleration of Zn2+ kinetics. As a result, the proposed Na+-intercalated MnO2 (NMO) and K+-intercalated MnO2 (KMO) present enhanced electrochemical performances and Zn2+ transfer kinetics. Specifically, NMO 600 and KMO 650 deliver the capacities of 236.3 and 158.2 mAh g–1 after 100 cycles at 0.1 A g–1, respectively, which are larger than that of pristine δ-MnO2. This work substantiates the potential of alkali-metal-ion “pillars” in improving the zinc-ion storage capability of layered MnO2 cathode and provides a promising way to develop high-performance manganese-based cathode materials via a facile solid-phase method.
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
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2024
·
IF 4.1
Chen Wang,Peng Shi,Chao Guo,Rui Guo,Jiangyuan Qiu
Cobalt-based oxide CuCo 2 O 4 -loaded CuCo 2 O 4 /carbon felt (CF) composite cathodes were synthesized by hydrothermal deposition of a precursor of Cu/Fe oxides on CF followed by roasting in air. The material serves both catalytic and cathodic dual functions in the heterogeneous electro-Fenton (EF) process. Through XRD (X-ray diffraction), FTIR (Fourier transform infrared spectroscopy), XPS (X-ray photoelectron spectroscopy), SEM (scanning electron microscope), and catalytic experiments, it was concluded that CuCo 2 O 4 loading was successful and the highest hydrophilic 180-CuCo 2 O 4 /CF was obtained by varying the hydrothermal temperature without destroying the original structure. 180-CuCo 2 O 4 /CF accomplished 98.03 % degradation in 60 min, and it was found to maintain high degradation capacity in the pH 3 ∼ 9 range in experiments where the experimental parameters were varied. Compared to monometallic oxides, Cu and Co dual active centers are integrated in CuCo 2 O 4 , giving it diverse redox properties and oxidation states. As a result, the CuCo 2 O 4 /CF material can realize the dual function of catalytic and cathodic, which provides a new development direction in practical wastewater treatment.
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
危险品化学品经营许可证（带存储）