Journal of Physical Chemistry C
·
2023
·
IF 3.7
Jiahui Li,Dongwei Ma,Gui Lu,Dong Fu,Carlos Ponce de León,Jia Hong Pan
Al-ion batteries (AIBs) represent promising multivalent-ion battery alternatives to Li-ion batteries (LIBs). Exploration of cathode materials is the key to improving the electrochemical performance of AIBs. Here we demonstrate a promising AIB cathode candidate based on two-dimensional graphitic carbon nitride (g-C3N4) nanosheets with reversible de/embedding of [AlCl4]− anions in its special layered porous structure during the cyclic charge/discharge process. To address the sluggish ion/charge transportation kinetics that is inherently present in AIBs due to the intrinsically low conductivity of g-C3N4, we optimize different synthetic precursors of g-C3N4 including dicyandiamide, urea, and melamine and, further, develop a facile method for uniformly coating a N-doped carbon (N–C) coating layer on the optimal g-C3N4 derived from dicyandiamide. The resultant AIBs consisting of the g-C3N4@N–C cathode and Al metal anode in the AlCl3/[EMIm]Cl electrolyte exhibit an initial capacity of ∼54.9 mAh·g–1 at 0.2 C with a high Coulomb efficiency ∼99.9%, and they possess long-term cycling over 200 cycles. The underlying charge/discharge process of AIBs, revealed by the ex situ X-ray diffraction and scanning electron microscopy analyses, involves the extraction/insertion of Al species (mainly Al3+, AlCl4–, and Al2Cl7–) into the g-C3N4 crystal lattices with the formation of intermediate Al8C3N4 and (ClCN)3.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2025
·
IF 3.3
Fangjie Liu,Zhengqi Su,Haizhao Li,Qingjie Wang,Xin Wang,Weiwei Shang,Bin Xu
CoFe 2 O 4 (CFO) was identified as one of the potential cathode materials for solid oxide fuel cells (SOFCs). However, optimization was required due to limitations of electrochemical performance. Here effects of Ca doping on CFO were investigated for the oxygen reduction reaction (ORR) properties. Co 1-x Ca x Fe 2 O 4 (CCxFO, x = 0, 0.2 (CC2FO), 0.4 (CC4FO)) were synthesized with sol-gel method. Oxygen vacancy concentration was increased by Ca doping enhancing the electrochemical performance of CFO. At 750 °C, the polarization resistance (R p ) of CC4FO was 1.04 Ω·cm 2 , which was 1.09 Ω·cm 2 lower than that of CFO (2.13 Ω·cm 2 ). The electronic conductivity value (σ) of CC4FO was 0.614 at 750 °C and the activation energy (E a ) of CC4FO was 102.81 kJ/mol. The results indicated that improvements in the ORR activity of the CFO spinel material were mainly attributed to an increase in oxygen vacancy concentration and oxygen surface exchange rate due to Ca doping, CC4FO showed promising potential as SOFC cathode.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Chuntao Yang,Kaiyong Feng,Jiangchang Chen,Ze Liu,Yingjian Yu
The commercial applications of aqueous rechargeable zinc-ion batteries (ZIBs) remain limited mainly owing to the low capacity storage efficiency and structural deformation of cathode materials, coupled with anode dendrite formation and side reactions that compromise battery performance. Herein, the electronically conductive metal-organic framework (EC-MOF) DDA-Cu was developed and used as the cathode for the first time in ZIBs. The electrode material showed an excellent initial discharge capacity of 249.6 mAh g −1 at 0.2 A g −1 . Notably, it also reached a effective capacity of 120 mAh g −1 after 175 cycles at an increased current density of 1 A g −1 . When used as an interface protective coating for zinc anodes, the uniform pore channels of DDA-Cu facilitated homogeneous zinc-ion deposition, which effectively suppressed dendrite growth and side reactions, typically a hydrogen evolution reaction (HER). Compared with bare zinc anodes, the Zn@DDA-Cu anode significantly extended battery lifespan, demonstrating stable cycling for over 3500 h at 0.5 mA cm −2 . Notably, the full battery with a Zn@DDA-Cu anode and a DDA-Cu cathode exhibited stable cycling for 100 cycles at 1 A g −1 , retaining a capacity of 185.5 mAh g −1 . This study provides an innovative strategy for the development of promising EC-MOFs for practical ZIB application.
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
高影响因子
Nature Sustainability
·
2024
·
IF 25.7
Wang Junxiong,Ji Haocheng,Li Junfeng,Liang Zheng,Chen Wen,Zhu Yanfei,Ji Guanjun,Shi Ruyu,Zhou Guangmin,Cheng Hui-Ming
Direct recycling is a promising route for the sustainable management of end-of-life spent cathodes. However, its practical implementation is greatly restricted as most existing methods require heating or high-pressure conditions during the lithiation step to overcome the thermodynamic obstacles and realize lithium replenishment. In this study, we explored a strategy to realize spontaneous lithiation via simple solid–liquid mixing at ambient conditions. The thermodynamic barrier of the lithiation reaction was reduced by self-adsorbed amyloxylithium, which can spontaneously adsorb on the surface of degraded cathode particles without an external driving force. This strategy can regenerate both laboratory-dismantled LiNi 0.6 Co 0.2 Mn 0.2 O 2 from 10 Ah pouch cells and industrial-dismantled LiNi 0.5 Co 0.2 Mn 0.3 O 2 black mass. The capacity retention rate of a 1 Ah pouch cell assembled using regenerated LiNi 0.5 Co 0.2 Mn 0.3 O 2 as cathode material was 80.5% after 500 cycles. The proposed strategy has big economic advantages over conventional pyro- and hydrometallurgical methods, as evidenced by the techno-economic analysis, accompanied by obvious environmental benefits, as evidenced by reduced CO 2 emissions. This work provides a viable approach for the direct recycling of spent cathode material, improving the circularity of the battery industry.
研究领域:
材料科学
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能源技术
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Tongtong Yao,Nianjun Hou,Juanjuan Gan,Jun Wang,Xiaojing Zhi,Lijun Fan,Tian Gan,Yicheng Zhao,Yongdan Li
Sr 2-x Na x FeMo 0.65 Ni 0.35 O 6-δ is synthesized as an anode material for solid oxide fuel cells. The effects of Na on the crystalline phase and electrical properties are investigated. The main perovskite phase changes into a Ruddlesden-Popper structure after reduction when x is less than 0.1, while the material with a higher amount of Na keeps the perovskite structure. FeNi x alloy nanoparticles are exsolved during reduction, in which the content of Ni increases with the rise of Na amount. The surface oxygen vacancy concentration is also influenced by the doping of Na, and the highest value is reached when x is 0.1. Sr 1.9 Na 0.1 FeMo 0.65 Ni 0.35 O 6-δ anode exhibits the highest activity, and a single cell supported by a 300-μm-thick La 0.8 Sr 0.2 Ga 0.8 Mg 0.2 O 3-δ electrolyte layer shows maximum power densities of 1495 and 627 mW cm −2 at 850 °C with H 2 and wet CH 4 as fuels, respectively. The coking resistance of the anode is also improved with Na doping.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2022
·Vol. 26
·期 5
·1175-1183
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IF 2.747
Liu Xin,Zou Zhengguang,Meng Jianying,Zhang Shuchao,Zhong Shenglin,Li You
A V 6 O 13 micro-flower was synthesized via a facial hydrothermal method using ammonium metavanadate and oxalic acid dihydrate and combined with subsequent heat treatment. The effects of oxalic acid concentration and subsequent calcination temperature on the crystallinity and microstructure of V 6 O 13 are discussed in detail. We have compared these data to determine the optimal amount of reducing agent and calcination temperature and futher explored the electrochemical properties of cathode materials. The results show that the concentration of oxalic acid and calcination temperature has a great influence on the morphology and crystallinity. When paired with Li anode, V 6 O 13 cathode exhibits excellent electrochemical performance that the initial specific capacity is 376.7 mA g −1 and the capacity retention of 48.3% after 100 cycles at the current density of 100 mA g −1 . This work provides some references for the development of high-performance lithium-ion battery cathodes. Graphic abstract
研究领域:
材料科学
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电化学
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能源存储
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纳米结构材料
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电池技术
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Jian Zhang,Penghui Yao,Xuanlin Lu,Jiaxuan Chen,Wen Liu,Yicheng Zhao,Yongdan Li
The sluggish oxygen reduction reaction (ORR) at the cathode is a key step in protonic ceramic fuel cells. In this work, Pr 1.7 Sr 0.3 Ni 0.7 Cu 0.3 O 4+δ cathode with a Ruddlesden-Popper (RP) structure is modified with the doping of Ba, and BaPrO 3-δ nanoparticles are formed on the surface of the cathode. The addition of Ba improves the oxygen vacancy concentration and the electrical conductivity of the cathode, and the cathode with the nominal composition of Pr 1.7 Ba 0.15 Sr 0.3 Ni 0.7 Cu 0.3 O 4+δ shows the highest activity for the ORR process. The cathode shows the lowest polarization resistance of 0.055 Ω cm 2 at 700 °C. The hydration ability of the cathode is also enhanced with Ba. The maximum power density of a protonic ceramic fuel cell with Pr 1.7 Sr 0.3 Ni 0.7 Cu 0.3 O 4+δ cathode increases from 877 to 1262 mW cm −2 at 700 °C after the doping of Ba in the cathode. The cell also shows a promising durability.
研究领域:
材料科学
·
能源工程
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Yanli Zhang,Zongchao Zhu,Yiheng Gu,Han Chen,Yifeng Zheng,Lin Ge
In this paper, a novel Cl − anion doping strategy is proposed to modify the electrochemical performance of Sr 2 Fe 1.5 Mo 0.5 O 6− δ (SFM) cathode for solid oxide fuel cells. A series of Cl-doped Sr 2 Fe 1.5 Mo 0.5 O 6− x − δ Cl x (SFMCl x , x = 0, 0.1, 0.2, 0.3, 0.4) materials is synthesized by the citric acid–glycine combustion method, and the effect of Cl doping on the crystal structure and electrochemical performance is systemically investigated. The doping of Cl into the SFM leads to the lattice expansion, and the electrochemical performance of Cl-doped SFMCl x cathodes is effectively improved as a result of the enhanced mobility of lattice oxygen introduced by Cl doping. The optimal composition with x = 0.2 (sample Sr 2 Fe 1.5 Mo 0.5 O 5.8− δ Cl 0.2 , noted as SFMCl0.2) exhibits a minimum polarization resistance R p value of 1.987 Ω cm 2 at 600 °C, reduced by 38.04% compared with the SFM cathode. These results suggest that Cl doping is an effective strategy to improve the electrochemical properties of cathode for solid oxide fuel cells.
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 Energy Chemistry
·
2018
·
IF 3.886
Houfu Lv,Yingjie Zhou,Xiaomin Zhang,Yuefeng Song,Qingxue Liu,Guoxiong Wang,Xinhe Bao
Solid oxide electrolysis cell (SOEC) can electrochemically convert CO 2 to CO at the gas-solid interface with a high current density and Faradaic efficiency, which has attracted increasing attentions in recent years. Exploring efficient catalyst for electrochemical CO 2 reduction reaction (CO 2 RR) at the cathode is a grand challenge for the research and development of SOEC. Sr 2 Fe 1.5 Mo 0.5 O 6- δ (SFM) is one kind of promising cathode materials for SOEC, but suffers from insufficient activity for CO 2 RR. Herein, Gd 0.2 Ce 0.8 O 1.9 (GDC) nanoparticles were infiltrated onto the SFM surface to construct a composite GDC-SFM cathode and improve the CO 2 RR performance in SOEC. The current density over the GDC infiltrated SFM cathode with a GDC loading of 12.8 wt% reaches 0.446 A cm −2 at 1.6 V and 800 °C, which is much higher than that over the SFM cathode (0.283 A cm −2 ). Temperature-programmed desorption of CO 2 measurements suggest that the infiltration of GDC nanoparticles significantly increases the density of surface active sites and three phase boundaries (TPBs), which are beneficial for CO 2 adsorption and subsequent conversion. Electrochemical impedance spectroscopy results indicate that the polarization resistance of 12.8 wt% GDC-SFM cathode was obviously decreased from 0.46 to 0.30 Ω cm 2 after the infiltration of GDC nanoparticles.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2023
·Vol. 29
·期 7
·2549-2561
·
IF 2.8
Peng Jiaqi,Wei Yuanyuan,Hu Bin,Zhang Liang,Huang Jinfu,Tang Hongyu,Huang Bin,Li Yanwei,Chen Shaojun,Xiao Shunhua
Due to the urgency of developing high energy density cathode materials in power batteries, as well as the high price and environmental unfriendliness of cobalt, researchers are working on ultra-high nickel low cobalt and ultra-high nickel cobalt-free layered cathode materials. However, the poor cyclic stability and rate performance of this material resulted from structural instability and severe surface/interface side reactions during cycling seriously hinder its practical application. In this paper, LiNi 0.9 Mn 0.1 O 2 (NM90) cathode material is modified by La 2 O 3 coating, and La 3+ doping caused by thermal diffusion is achieved simultaneously. The synergistic enhancement of the two modifications can effectively improve the layered structure and reduce surface/interface side reactions. The dual-modified material shows good structural stability, the La 2 O 3 coating does not fall off and the active material does not appear fragmentation and collapse after 100 cycles. At the same time, the dual-modified material also shows excellent electrochemical performance, with a capacity retention of 83.19% after 100 cycles at 1 C and a reversible capacity of 129.9 mAh g −1 at 10 C. The electrochemical mechanism reveals that the dual-modified material effectively reduces the charge transfer resistance and greatly increases the Li + diffusion coefficient. It will provide useful reference and technical support for the research of other electrode materials. Graphical abstract The NM90 and La 2 O 3 -coated NM90 particles have similar spherical morphology and are formed by the agglomeration of many primary particles; the surface of NM90 material is evenly coated by La 2 O 3 and No obvious boundary between La 2 O 3 and NM90 materials is found; LiNi 0.9 Mn 0.1 O 2 cathode material coated by 1wt% La 2 O 3 has the best cycle 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
ACS Applied Energy Materials
·
2024
·
IF 5.4
Gang Ni,Mengmeng Sun,Ning Wang,Zhiqiu Pan,Fuhu Cao,Peng Cui,Chenggang Zhou
As promising candidates for large-scale energy storage applications, aqueous zinc ion batteries (AZIBs) face challenges due to the electrochemical instability of cathode materials and Zn anodes. Introducing additives into the electrolyte is an effective approach to improving the compatibility of electrodes. In this work, trace amounts of poly(acrylic acid) (PAA) are utilized as electrolyte additives in 1.0 M ZnSO4 to enhance the cycle performance of the Zn3[Fe(CN)6]2/Zn battery. PAA demonstrates strong interfacial engineering ability on both the cathode and anode. PAA directly reacts with the Zn anode, leading to the formation of PAA–Zn films growing on the anode surface. The interfacial film inhibits the parasitic hydrogen evolution reactions, reducing the generation of byproducts. Regulating the anode’s interfacial structure promotes the uniform deposition of Zn. The electrolyte with 0.8 wt % PAA additives enables a long cycle life exceeding 300 h at 5 mA·cm–2 and 2.5 mAh·cm–2 in Zn/Zn symmetric cells, along with a high Coulombic efficiency of 98.07% in Cu/Zn asymmetric cells. Meanwhile, PAA preferentially adsorbs on the surface of the Zn3[Fe(CN)6]2 cathode, inhibiting the dissolution of ferricyanide anions in aqueous solution and reducing the self-discharge behavior. Thanks to the interfacial regulation of PAA on both the cathode and anode, the cycle performance of the Zn3[Fe(CN)6]2/Zn full cell is significantly enhanced to nearly six times that without PAA additives. This work lays the groundwork for the development of electrolyte additives that can improve the electrochemical performance of both the cathode and anode of AZIBs.
研究领域:
电化学
·
能源存储
·
材料科学
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Xin Wan,Yanyun Zhang,Fangfang Dong,Ning Wang,Congyi Hao,Xiang Huang,Wei Liu,Yongcheng Jin
O3-type layered oxide materials are considered one of the most promising cathode materials for sodium-ion batteries due to their high capacity. However, the structural evolution of the O3-type layered oxide during cycling is more complex, exhibiting poorer structural reversibility. In order to achieve a high electrochemical performance of O3-type sodium-ion cathode materials, we adopted a high-entropy strategy to realize multielement codoping of Mg, Co, and Ti into the transition metal layer of O3-type NaNi0.4Fe0.2Mn0.4O2 and prepared a high-entropy cathode material of NaNi0.35Mg0.05Fe0.15Co0.05Mn0.35Ti0.05O2 (NMFCMT-2). The transition metal layer doped with multiple elements Mg, Co, and Ti not only stabilizes the crystal structure and widens the layer spacing but also weakens the Na–O bonding, thereby facilitating sodium-ion diffusion and mitigating volume changes during the charge–discharge process. In situ XRD results show that this strategy can delay the phase transition of O3–P3 and realize the phase transition of P3–O3 in advance during the discharge process so that NMFCMT-2 can maintain the O3 phase to a greater extent during the cycles. The results show that the capacity retention rate was 80.6% after 200 cycles at 1C and 88.6% after 200 cycles at 5C. In addition, its high voltage cycling stability is also significantly improved compared to the pristine NaNi0.4Fe0.2Mn0.4O2.
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
危险品化学品经营许可证（带存储）