FUEL
·
2024
·
IF 6.7
Hao Lou,Baixi Xia,Chuangang Yao,Haixia Zhang,Zhe Zhang,Yuxi Sun,Jingyi Ding,Li Zhang,Xiaoshi Lang,Kedi Cai
Advancing solid oxide fuel cells (SOFCs) significantly relies on the development of cathode materials that exhibit both high performance and stability. This study introduces a novel heterostructure composite cathode by combining La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3- δ (LSCF) particles with Ce 0.8 Pr 0.2 O 1.9 (CPO) nanosheets through hydrothermal synthesis. The LSCF-CPO composite demonstrates remarkable enhancements in both catalytic activity and CO 2 resistance. The distinctive nanosheet morphology of CPO and the extensive heterointerfaces facilitate superior charge transfer and accelerate the processes of oxygen adsorption and dissociation. The incorporation of CPO nanosheets reduces the thermal expansion of LSCF and alters the oxygen ion transport properties, thereby establishing a three-dimensional network for enhanced ion conduction. At 750 °C, the single cell using the LSCF-10CPO cathode achieves a remarkable peak power density of 1179 mW cm −2 , representing a notable 48 % enhancement over the single-phase LSCF. Additionally, the LSCF-10CPO exhibits exceptional CO 2 tolerance. This research offers valuable insights into the design of next-generation SOFC cathodes with enhanced performance and stability, paving the way for future advancements in energy technology.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2023
·
IF 3.2
Jingfang Zhang,Weishang Jia,Hao Yang,Xinrui He,Shuqing Ao,Chongyang Jin,Pengyu Chen,Hudong Li,Xinxiu Yan,Zhaoxia Ma,Yao-Yue Yang
Zinc-ion battery is regarded as one of the potential alternatives for advanced energy storage system , due to its high discharge capacity, low cost, and environmental benignity. The research and development of new electrode materials and reaction mechanism for zinc-ion battery have attracted most attention. Herein, cerium oxide is systematically investigated as a novel cathode material for aqueous zinc-ion battery. The battery charge and discharge test results show that cerium oxide has a discharge specific capacity comparable to that of manganese oxide cathode material, the discharge specific capacity is stable at 143.8 mAh g −1 after 500 cycles. The cyclic voltammetry curves and charge-discharge curves of cerium oxide are very similar to manganese oxide cathode materials. The results of X-ray diffraction and X-ray photoelectron spectroscopy demonstrate that the performance of cerium oxide as a cathode material for aqueous zinc-ion battery is related to the reaction product of zinc sulfate hydroxide hydrate and manganese ion in the electrolyte. And it is found that the discharge cut-off voltage also plays a crucial role in the discharge capacity of the aqueous zinc-ion battery with manganese ion.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
电池技术
✓ 已验证
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 52
·30556-30564
·
IF 3.049
Weijun Zhou,Jizhang Chen,Minfeng Chen,Xinwu Xu,Qinghua Tian,Junling Xu,Ching-Ping Wong
Aqueous zinc-ion batteries offer a low-cost and high-safety alternative for next-generation electrochemical energy storage, whereas suitable cathode materials remain to be explored. Herein, rod-like anhydrous V2O5 derived from a vanadium-based metal–organic framework is investigated. Interestingly, this material is assembled by tiny nanosheets with a large surface area of 218 m2 g−1 and high pore volume of 0.96 cm3 g−1. Benefiting from morphological and structural merits, this material exhibits excellent performances, such as high reversible capacity (449.8 mA h g−1 at 0.1 A g−1), good rate capability (314.3 mA h g−1 at 2 A g−1), and great long-term cyclability (86.8% capacity retention after 2000 cycles at 2 A g−1), which are significantly superior to the control sample. Such great performances are found to derive from high Zn2+ ion diffusion coefficient, large contribution of intercalation pseudocapacitance, and fast electrochemical kinetics. The ex situ measurements unveil that the intercalation of Zn2+ ion is accompanied by the reversible V5+ reduction and H2O incorporation. This work discloses a direction for designing and fabricating high-performance cathode materials for zinc-ion batteries and other advanced energy storage systems.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米科技
·
无机化学
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 10
·期 3
·984-990
·
IF 7.779
Jujun Yuan,Yunfei Gan,jirong Mou,Xiangdong Ma,Xiaokang Li,Junxia Meng,Lishuang Xu,Xianke Zhang,Haishan He,Jun Liu
Vanadium-based oxides have captured considerable attention as ZIB cathodes benefiting from their rich valences and superior theoretical capacity. However, vanadium-based oxides still suffer from structural instability, low electronic conductivity, and slow reaction dynamics, which will lead to poor zinc ion storage performance. Herein, amorphous VOx/NC porous spheres were fabricated by in situ, electrochemically-induced vanadium-polydopamine-derived crystalline V2O3/NC porous spheres. As a zinc-ion battery cathode, the VOx/NC porous spheres exhibit a sustainable capacity of 233 mA h g−1 at 5 A g−1 upon 1500 cycles and superior rate property. The excellent electrochemical performance of the VOx/NC porous-sphere electrode is ascribed to its distinctive architecture. The VOx/NC porous spheres possess amorphous VOx with a higher oxidation states of V5+/V4+, which can increase the theoretical energy density, provide more active sites, and improve Zn2+ diffusion kinetics. Furthermore, VOx/NC porous spheres with a porous core–shell architecture can enhance electrical conductivity and ensure electrolyte accessibility. This synthesis strategy can be potentially extended to fabricate other VOx/carbon composites with high valence states (V5+ and V4+).
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米结构材料
·
电池技术
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Zhiying Han,Jinghe Bai,Xu Chen,Xiaofei Zhu,Defeng Zhou
The cobalt-free cathode materials with high activity is critical to the commercial application of medium temperature solid oxide fuel cells (IT-SOFC). Herein, a series of cobalt-free Nb-doped Pr 2 Ni 1- x Nb x O 4 ( x = 0, 0.05, 0.10, and 0.15) perovskite oxides were successfully prepared, and the effects of Nb-doping on the structure, thermal stability and electrochemical properties of the cathode material are studied in detail. The Pr 2 Ni 1- x Nb x O 4 exhibits a K 2 NiF 4 type structure with Fmmm space group. The Nb 5+ cations that doped into Pr 2 NiO 4 replaces the Ni site, which increases the surface oxygen content, then effectively eliminates the phase transition of Pr 2 NiO 4 and significantly improves the ORR catalytic activity . The Pr 2 Ni 0.9 Nb 0.1 O 4 was found to occupy the lowest polarization resistance of 0.057 Ω cm 2 , and the peak power density of single cells supported by the electrolyte is 0.576 W cm −2 at 700 °C, which has good long-term stability.
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
·
2016
·
IF 3.014
Silin Li,Hengyong Tu,Feng Li,Muhammad Tuoqeer Anwar,Lijun Yu
In order to improve the performance of intermediate temperature solid oxide fuel cells (IT-SOFCs), the effect of partial substitution of the transition metal M = Co, Cu, Fe and Mn for Ni in Nd 2 NiO 4+δ on the crystal chemistry, electrical conductivity , thermal stability, chemical reactivity with YSZ electrolyte and electrochemical performance has been systematically investigated. The electrochemical performances of the cathode materials are tested on planar NiO-YSZ anode-supported cells fabricated with YSZ as electrolyte in size of 50 mm × 50 mm. Compared to Nd 2 NiO 4+δ , each Nd 2 Ni 0.9 M 0.1 O 4+δ material shows a decrease in electrical conductivity and an increase in lattice volume, oxygen vacancy concentration and chemical reactivity with YSZ electrolyte. The cell with Nd 2 Ni 0.9 Co 0.1 O 4+δ cathode achieves the maximum power density of 530 mW cm −2 at 0.7 V at 800 °C. The cell with Nd 2 Ni 0.9 Cu 0.1 O 4+δ cathode is the most stable in short-term test. A small amount of B-site doping in Nd 2 NiO 4+δ does not cause any change in the cathode microstructure. The study demonstrates that a tradeoff between oxygen transport properties and electrical conductivity can be accomplished by appropriate selection of transition metal and level of cation B-site doping in Nd2NiO4+δ. Nd2Ni0.9M0.1O4+δ (M = Co, Cu) can be considered to be potential cathode materials in IT-SOFCs.
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
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Jinghe Bai,Defeng Zhou,Leilei Niu,Xiaofei Zhu,Ning Wang,Qingwen Liang,Youjie Zhang,Ling Hu,Huifang Gong,Wenfu Yan
Here, in situ assembly in La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ and CoFe 2 O 4 composite (LSCFC) cathode was induced by Pr to form La 0.6 Sr 0.4 Co x Fe y O 3-δ /PrCoO 3 /Co 3 O 4 /PrO 2 (LSCFC-PI) multiphase heterostructures . The surface of LSCFC-PI forms uniform nanoparticles , and the unique core-shell structure prevents Sr segregation, thereby enhancing CO 2 tolerance and increasing oxygen reduction reaction (ORR) active sites. Furthermore, compared with LSCFC, LSCFC-PI increases the oxygen vacancy content of the cathode due to the existence of multiphase heterostructure, improves the ORR kinetics, and the conductivity is also greatly improved. The peak power density (PPD) of LSCFC-PI as a single-cell cathode at 700 ℃ reached 1.51 W cm −2 , which was 2.65 times higher than that of LSCFC's 0.57 W cm −2 , and in the long-term stability test at a constant voltage ∼0.8 V for 100 hours, showing excellent stability. In situ assembly of multiphase heterostructures is expected to become a new strategy for developing high-performance IT-SOFC cathodes.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Jinglian Zhu,Xu Zhang,Haiguang Gao,Yuting Shao,Yana Liu,Yunfeng Zhu,Jiguang Zhang,Liquan Li
Rechargeable magnesium batteries (rMBs) are promising techniques suitable for large-scale energy storage systems with low-cost and high safety. However, their development is severely hindered by strong coulombic effect between bivalent Mg 2+ and cathode materials . In this work, two dimensional hierarchical nano-micro hybrids are synthesized by in-situ generating VS 4 nanosheets on carbon-coated Ti 3 C 2 MXene matrix (denoted as VS 4 @Ti 3 C 2 /C). A high-performance rMB system is built by using the hierarchical nano-micro hybrids cathode, magnesium foil anode, and 0.25 M methylpyrrolidinium chloride in 0.25 M 2PhMgCl-AlCl 3 /tetrahydrofuran as the electrolyte. The existence of V–C bond proves that VS 4 is anchored on the surface of Ti 3 C 2 via a strong chemical bond, rather than simply by adsorption. The unique hierarchical nano-micro structure improves the accessibility of the electrolyte and reduces the charge transfer resistance, leading to a high discharge capacity of 492 mA h g −1 at 50 mA g −1 , an outstanding rate performance of 129 mA h g −1 at 1000 mA g −1 , and excellent cycling performance (over 900 cycles at 500 mA g −1 ). Moreover, reversible intercalation of MgCl + into VS 4 @Ti 3 C 2 /C is revealed by investigating the evolution of the hybrids during different electrochemical states. This study will shed light on designing high-performance MXene-based cathode materials for multivalent batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
多价离子电池
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Mengna Qin,Guibao Wu,Kai Zheng,Xiaofei Yu,Juan Xu,Jianyu Cao
The pH-neutral aqueous redox flow battery (ARFB) is one of the most attractive flow batteries due to its non-corrosiveness, low-cost, and wider electrochemical stability window compared to those with acidic or alkaline electrolytes. However, there are few families of organic redox-active molecules available as catholyte materials for pH-neutral ARFBs. Herein, through incorporation of quaternary ammonium moiety into the redox-active phenoxazine nucleus, an organic catholyte material, N , N , N -trimethyl-2-(10H-phenoxazin-10-yl) ethan-1-aminium chloride (NEt-POZ) is achieved for pH-neutral ARFBs. The NEt-POZ has a high redox potential of 0.79 V versus SHE and rapid redox kinetics (0.23 cm s −1 ) as well as high water-solubility (∼2.6 M in H 2 O). Paired with a methyl viologen (MV) anolyte in the pH-neutral aqueous electrolyte, a viologen-phenoxazine ARFB full cell is assembled, which shows an open circuit voltage of ∼1.23 V. However, the results of long-term cycling experiments indicate low Coulomb efficiency and rapid declining capacity of the NEt-POZ catholyte. The mechanism analysis unveils that the unstable doubly oxidized tri-cations (NEt-POZ 3+ ) formed via the disproportionation of radical di-cations (NEt-POZ 2+ ) in solution readily react with chloride anions to form poly-chlorinated derivatives, which precipitate from the catholyte due to their poor water solubility, leading to a rapid decrease in capacity. When there is no chloride present in the electrolyte solution, highly reactive NEt-POZ 3+ cations can interact with other counter-anions (such as sulfate and carbonate ions) and even water to form complex adducts.
研究领域:
能源化学
·
电化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Ru-Yi Chen,De-Feng Zhou,Xiao-Fei Zhu,Ning Wang,Jing-He Bai,Chun-Qi Guo,Lian Ai
Cobalt-based perovskites are widely used as cathode materials for intermediate temperature solid oxide fuel cells (IT-SOFCs) due to their excellent catalytic activities. In this paper, a series of Nb-doped La 0.5 Sr 0.5 Co 0.8 Cu 0.2- x Nb x O 3–δ (LSCCu 0.2- x Nb x O 3-δ , x = 0.00 ≤ x ≤ 0.075) cathode materials with excellent electrochemical performance are prepared by a Pechini method, and the critical Nb-doping effect is studied in detail. In the new cathode material, the surface oxygen content increases with the Nb doping, while the segregation of Sr and the coefficient of thermal expansion (TEC) is reduced. The optimum LSCCu 0.15 Nb 0.05 O 3-δ shows the highest surface oxygen content, the lowest surface Sr content, and the highest oxygen reduced reaction (ORR) catalytic activity. At 700 °C, the polarization resistance (Rp) is 0.065 Ω cm 2 , and the peak power density (PPD) of single cells supported by the electrolyte is 518 mW cm −2 , which are promising for the IT-SOFCs. Therefore, the LSCCu 0.15 Nb 0.05 O 3-δ should be a promising cathode material for the high-performance IT-SOFCs.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2020
·Vol. 45
·期 4
·5337-5346
·
IF 3.741
Chuangang Yao,Jixing Yang,Haixia Zhang,Sigeng Chen,Jian Meng,Kedi Cai
Summary Cu doped perovskites SrFe 0.9- x Cu x Mo 0.1 O 3- δ (SFCM, x = 0-0.2) are explored as cathodes for IT-SOFCs. The influence of Cu doping on the property of SFCM series was studied in detail. The oxygen content decreases with the increase of Cu doping amount. SFCM samples are chemically compatible with LSGM electrolyte. However, the TEC values are still a bit higher than that of some common SOFC electrolytes. At 750°C, the R p values are 0.261, 0.227 and 0.155 Ω·cm 2 for SFCM0, SFCM0.1, and SFCM0.2. The obtained activation energies for x = 0, 0.1, and 0.2 are 1.01, 0.98, and 0.87 eV, respectively. These results indicate that Cu doping into SrFe 0.9- x Cu x Mo 0.1 O 3- δ has a favorable effect on the electrochemical activity of the materials.
研究领域:
材料科学
·
电化学
·
能源材料
·
固体氧化物燃料电池
·
无机功能材料
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
JinFeng Ou,Wenbin Luo,Jian Li,Yi Yu,Zhen Zhang,Zisheng Chao,WenJun Yi,JinCheng Fan
This paper designed and successfully prepared a novel sandwich-like structure CuS@GO as a cathode material of aluminum batteries (ABs). Graphene oxide (GO) nanosheets sandwich CuS nanotubes (NTs) in the middle, and the interconnected carbon layers form a 3D conductive network to connect all CuS NTs. This nanotubular structure is conducive to the infiltration of electrolytes, provides more active sites, and promotes a rapid charge transfer. The one-dimensional hollow tubular structure of CuS and the sandwich-like structure composed of GO can buffer the volume changes generated during cycling, increase mechanical stress, and enhance the structural stability of the material. The synergistic effect of the unique microstructure composed of CuS NTs and GO leads to an enhanced electrochemical performance. At a current density of 0.2A g–1, CuS@GO maintains a specific capacity of nearly 96.85 mAh g–1 and Coulombic efficiency (CE) of nearly 100% after 200 cycles. The electrochemical reaction mechanism of CuS@GO as a cathode material for ABs was also investigated.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）