CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Jihong Bian,Kangning Wang,Jinbo Zhang,Yanzhong Zhen,Jianwei Wang,Yaodong Yang,Feng Fu
Shortage of energy and computing power puts forward requirements for developing multifunctional devices. Inherent defects greatly limit the development of transition metal oxides as promising candidate for energy storage and memory applications. We propose a facile strategy to modify MnO 2 via controlling the doping amount of Co, effectively regulating the structural, magnetic and electrical properties. The 15.78 %Co-MnO 2 is nano-flower-like in δ phase with a specific surface area of 123.86 m 2 g −1 and rich oxygen vacancies. Its corresponding memristors exhibit stable and repeatable, sweep speed-dependent and voltage magnitude-dependent volatile bidirectional threshold switching behavior with high switching ratio of 10 4 over 1100 cycles, which is attributed to the formation and rupture of conductive filaments formed by a large number of oxygen vacancies and a small number of Co ions under the electric field. By controlling the applied voltage and compliance current, multilevel resistance states are shown. Besides, 15.78 %Co-MnO 2 also exhibits excellent zinc storage performance, due to its large specific surface area, nano-sized structure and abundant oxygen vacancies. This work lays a foundation for developing high-performance and low-dimensional memristor devices and capacitors, and paves a way for low-power multifunctional devices.
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
Journal of Energy Chemistry
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2024
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IF 14
Tao Zhou,Xuan Du,Guo Gao
Exploring suitable high-capacity V 2 O 5 -based cathode materials is essential for the rapid advancement of aqueous zinc ion batteries (ZIBs). However, the typical problem of slow Zn 2+ diffusion kinetics has severely limited the feasibility of such materials. In this work, unique hydrated vanadates (CaVO, BaVO) were obtained by intercalation of Ca 2+ or Ba 2+ into hydrated vanadium pentoxide. In the CaVO//Zn and BaVO//Zn batteries systems, the former delivered up to a 489.8 mAh g −1 discharge specific capacity at 0.1 A g −1 . Moreover, the remarkable energy density of 370.07 Wh kg −1 and favorable cycling stability yard outperform BaVO, pure V 2 O 5 , and many reported cathodes of similar ionic intercalation compounds. In addition, pseudocapacitance analysis, galvanostatic intermittent titration (GITT) tests, and Trasatti analysis revealed the high capacitance contribution and Zn 2+ diffusion coefficient of CaVO, while an in-depth investigation based on EIS elucidated the reasons for the better electrochemical performance of CaVO. Notably, ex-situ XRD, XPS, and TEM tests further demonstrated the Zn 2+ insertion/extraction and Zn-storage mechanism that occurred during the cycle in the CaVO//Zn battery system. This work provides new insights into the intercalation of similar divalent cations in vanadium oxides and offers new solutions for designing cathodes for high-capacity aqueous ZIBs.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
Energy & Environmental Science
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2020
·Vol. 13
·期 9
·3149-3163
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IF 30.289
Zhenguo Yao,Qingping Wu,Keyi Chen,Jianjun Liu,Chilin Li
Aqueous Zn metal batteries (ZBs) have obtained increasing attention recently owing to their low-cost and environmentally friendly nature. Unfortunately, the sluggish Zn2+ de/intercalation in hosts often requires the nanostructural tailoring of cathode materials, which however degrades the tap density and accelerates the dissolution of active species. Herein, we propose a shallow-layer pillaring strategy to drive the superior zinc storage performance of V2O5 monolithic grains without the prerequisite of intentional nanoscale attenuation. The in situ polymerized 3,4-ethylenedioxythiophene chains only in the near-surface V2O5 interlayers are sufficient to activate a cascading effect to successively open the deeper interlayers during Zn intercalation. This synergic interlayer expansion mechanism leads to a thorough and quick redox process of bulk phase V2O5 even with micro-sized grains as opposed to the poor reaction kinetics in the non-pillared one. In contrast to excess pillaring or cation doping, the shallow-layer hybridization with a hydrophobic conductive polymer can suppress the dissolution of active species, reinforce the conductive contact between grains, lower the Zn2+ diffusion barrier (0.39 eV) and absorption energy (0.17 eV), and upgrade the pseudocapacitance contribution (>67%) and Zn2+ diffusion coefficient (1.43 × 10−9–1.81 × 10−8 cm2 s−1). This composite cathode enables an unprecedented cycling/rate performance (e.g. 388, 367 and 351 mA h g−1 even at 5, 8 and 10 A g−1 respectively, and 269 mA h g−1 after 4500 cycles at 10 A g−1), corresponding to high energy densities of 280.2 and 205.8 W h kg−1 under ultrahigh power densities of 700.5 and 5960 W kg−1, respectively. This concept of shallow-layer pillaring activation (especially via rich organic molecules) can be extended to more electrode systems with the preservation of the grain integrity.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
CHINESE CHEMICAL LETTERS
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2022
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IF 8.455
Wenshan Gou,Tian Jiang,Wei Wang,Qi Fan,Yan Zhang
Rechargeable aqueous zinc-ion batteries (AZIBs) are attracting tremendous attention because of their intrinsic merits such as high safety and low cost. Cathode plays a critical role in enhancing the electrochemical performance of AZIBs. However, it is difficult to design a robust and high-efficiency cathode material and further implement the commercialization of AZIBs. Metal-organic frameworks (MOFs) electroactive compounds are attractive to serve as the cathode of AZIBs due to their unique porosity and crystal structures, resource renewability and structural diversity. In this work, a calcium-pure terephthalates acid framework (Ca-PTA·3H 2 O) was synthesized by facile hydrolysis and cationic exchange method, then explored as a novel cathode for AZIBs. The results highlight a high specific capacity of 431 mAh/g (0.51 mAh/cm 2 ) at a current density of 50 mA/g, and excellent cycle performance with capacity retention of ∼90% after 2700 cycles at 500 mA/g. The following up characterizations investigate the reversible zinc storage mechanism in detail. This experiment made a specific contribution to the exploration of the new MOF as a competitive cathode for AZIBs.
研究领域:
材料科学
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电化学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Xiaodong Liu,Chunyang Liu,Zhiqiang Wang,Hongming Chen,Zijin Liu,Jiaqi Yang,Woon-Ming Lau,Dan Zhou
Aqueous zinc-ion batteries (AZIBs) are now vigorously explored as a class of novel and competitive candidates for large-scale energy storage in terms of high safety, eco-friendliness and low cost. In order to realize efficient Zn-storage with desirable cycling stability and rate capability, constructing suitable cathode materials that possess reliable host structure and fast Zn 2+ diffusion kinetics makes a lot of sense. Herein, novel V 2 O 5 nanofibers were facilely synthesized via a hydrothermal method and employed as a cathode material for AZIBs. By matching with aqueous Zn(CF 3 SO 3 ) 2 electrolyte, the cathode is able to achieve a specific capacity as high as 264.5 mAh g −1 at 200 mA g −1 . Even conducted at a large current density of 2000 mA g −1 , a considerable rate capability of 132.6 mAh g −1 can also be delivered. In addition, electrochemical reaction kinetics and ion diffusion mechanism were initially conducted to uncover the insights for efficient Zn-storage. This work is anticipated to offer feasible strategy for the design and fabrication of promising vanadium-based cathode materials for rechargeable AZIBs.
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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产品关联
DOI
高影响因子
IONICS
·
2023
·Vol. 29
·期 7
·2783-2791
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IF 2.8
Xu Wengang,Xie Qizhen,Chen Xiaobo,Wu Mingjun,Zhang Jun,Ru Qiang
Aqueous zinc-ion batteries (AZIBs) are considered to be one of the potential alternatives for lithium-ion batteries. Vanadium-based oxides as cathode materials have aroused increasing attention because of their advantages, such as low cost and high specific capacity. But its rapid capacity decay prompted researchers to explore various modified techniques. Herein, an electrolyte modification strategy by introducing acid trisodium salt (EDTA-3Na) additive to 2 M ZnSO 4 solution is developed to stimulate high reversible zinc storage. The desolvation effect of EDTA-3Na in the electrolyte optimizes the zinc deposition behavior and inhibits the formation of zinc dendrites, which could reduce the resistance of the VO 2 //Zn full cells and accelerate the reaction kinetics of the cathode. The VO 2 //Zn full cells can present a high zinc storage capability of 281.5 mAh g −1 at a high current density of 5 A g −1 after 1000 cycles and deliver prominent rate performance of 403.6, 373.5, 343.1, and 297.6 mAh g −1 at 1, 2, 4, and 8 A g −1 respectively.
研究领域:
储能
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电化学
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材料科学
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电池技术
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2022
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IF 4.326
Haichao Yu,Xuan Chen,Jie Zhou,Hui Wang
Zn-ion hybrid supercapacitors (ZHSCs) have been considered as a promising candidate for energy storage systems because of the merits they inherited from both supercapacitors and rechargeable batteries. Herein, we show the eco-friendly modified solvent evaporation-induced self-assembly (EISA) synthesis of newly engineered plant polyphenol tannin-derived ordered mesoporous carbons (TOMCs) and employ them as cathode material for high-performance ZHSCs to promote the diffusion dynamics of Zn2+ ions for the first time. The optimized TOMC-700 possesses a high Brunauer–Emmett–Teller (BET) surface area of 967 m2 g–1, narrow mesopores centered at ∼3.5 nm, and rich heteroatoms. Profiting from the synergy of enhanced kinetics and electroactivity, the aqueous TOMC-700-based ZHSC exhibits intriguing Zn-storage capabilities, including a superior energy density of 148.9 Wh kg–1 at 180 W kg–1 in a broad potential range of 0–1.8 V and long-term cycling stability. Moreover, the quasi-solid TOMC-700-based ZHSC also delivers an outstanding energy density of 121.3 Wh kg–1 at 180 W kg–1. These results highlight the facile fabrication of a natural carbohydrate-derived ordered mesoporous carbon as cathode material, notably boosting the development of Zn-based hybrid energy storage systems.
研究领域:
材料科学
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能源存储
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纳米技术
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电化学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2023
·Vol. 30
·期 3
·1457-1467
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IF 2.8
Xu Wengang,Zhang Xiaonan,Li Junhao,Chen Xiaobo,Lan Lin,Zhang Jun,Ling Francis Chi-Chung,Ru Qiang
The scaffolded hierarchical CeVO 4 /V 2 CT x -MXene composite is harvested to boost the performance of vanadium oxides in aqueous zinc-ion batteries. Benefiting from the high electronic-ion conductivity of V 2 CT x -MXene and the multilayered structure of the composite, CeVO 4 /V 2 CT x -Mxene cathode depicts the advantages of the acceptable zinc storage and ionic reaction kinetics. Compared with pure CeVO 4 , CeVO 4 /V 2 CT x -MXene cathode shows a reversible discharge capacity of 295.0 mAh g −1 at 1 A g −1 , capacity retention of 81.6% over 3000 cycles at 5 A g −1 , and good high-rate performance of 233.5 mAh g −1 at 8 A g −1 . The quasi-solid-state batteries of CeVO 4 /V 2 CT x -MXene demonstrate well mechanical deformability and good cycling performance. This work provides a reference for solving the problem of vanadium-based materials for aqueous zinc-ion batteries.
研究领域:
材料科学
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能量存储
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电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）