INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Shuai Zhang,Zhenqian Li,Meng Wang,Dongyi Jia,Haiyi Jin,Han Zhang,Haipeng Zhang,Yixuan Ma
The development of high-performance and cost-effective battery technologies is crucial for storing and utilizing intermittent renewable energy. Aqueous iron-ion batteries (AIBs) constructed using low-cost iron salts hold promise in energy storage strategies but are constrained by the complex design and construction of cathode materials. Here, we report a one-step synthesis of carbon nanodots as conductive substrates for cathode-free aqueous iron-ion batteries, enabling the efficient deposition of hydroxyl iron oxide and enhanced ion storage. Scanning electron microscopy (SEM), X-ray diffraction (XRD), and Raman analyses confirm the effective deposition of hydroxyl iron oxide, ensuring the achievement of a maximum capacity of 0.43 mAh cm −2 . The designed cathode-free aqueous iron-ion battery demonstrates a long cycling life of up to 2000 cycles, representing a new direction for the development of aqueous iron-ion batteries.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·
IF 13.3
Chang Li,Yushuang Xu,Wenjun Deng,Yi Zhou,Xinyu Guo,Yan Chen,Rui Li
Although the research on aqueous batteries employing metal as the anode is still mainly focused on the aqueous zinc-ion battery, aqueous iron-ion batteries are considered as promising aqueous batteries owing to the lower cost, higher specific capacity, and better stability. However, the sluggish Fe 2+ (de)intercalation leads to unsatisfactory specific capacity and poor electrochemical stability, which makes it difficult to find cathode materials with excellent electrochemical properties. Herein, phenylamine (PA)-intercalated VOPO 4 materials with expanded interlayer spacing are synthesized and applied successfully in aqueous iron-ion batteries. Owing to enough diffusion space from the expanded interlayer, which can boost fast Fe 2+ diffusion, the aqueous iron-ion battery shows a high specific capacity of 170 mAh g −1 at 0.2 A g −1 , excellent rate performance, and cycle stability (96.2% capacity retention after 2200 cycles). This work provides a new direction for cathode material design in the development of aqueous iron-ion 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
Small
·
2024
·Vol. 20
·期 52
·2407715
·
IF 13
Chang Li,Xinyu Guo,Wenjun Deng,Na Shen,Yi Zhou,Yan Chen,Rui Li
Aqueous iron-ion batteries with reversible storage of Fe 2+ have undergone rapid development in recent years. Consistently throughout these studies, metallic iron is selected as the anode material. However, the large overpotential (250 mV) associated with the plating/stripping process of iron in aqueous solutions leads to unsatisfactory energy efficiency of the battery, although high capacity and Coulomb efficiency can be achieved. Herein, an iron-free anode material, 9,10-anthraquinone (AQ) is proposed in aqueous iron-ion batteries, which shows a low reaction potential and minimal polarization during storing iron ions. The organic anode exhibits favorable specific capacity of 106 mAh g −1 at 0.5 A g −1 and excellent cycling stability (92.6% retention after 500 cycles). In addition, an aqueous full iron-ion battery is constructed using AQ as the anode and 9,10-phenanthraquinone (PQ) as the cathode. The full battery demonstrates an enhanced energy efficiency of 72%, which is 206% higher than that of metal iron anode, and shows excellent cycling stability and Coulombic efficiency. This work provides a viable route to overcome the high polarization of metallic iron anode and promote the development of aqueous iron-ion 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
Advanced Energy Materials
·
2025
·Vol. 15
·期 36
·e02595
·
IF 26
Xiang Ji,Yi Li,Yanlong Wang,Jian Jiang,Maowen Xu,Jianhui Zhu
Rechargeable Fe-ion batteries with overwhelming cost/environmental benign superiorities hold great promise in large-scale charge-storage applications. However, there is still a lack of competitive cathodes with prominent capacity and long-term cyclability. To overcome these constraints, a unique Fe 2+ /NH 4 + co-insertion strategy is proposed, enabling both doubled reversible capacity and cyclic life of Berlin green (FeHCF) cathodes. The Fe 2+ insertion proves to induce FeHCF lattice contractions, alter ligand environment/activation energies of low-spin Fe III, and hence boost the redox conversion depth, while NH 4 + co-insertions help to elevate the cathode capacities by utilizing Fe 2+ -unoccupied reaction sites. Besides, they generate hydrogen bonds between inserted NH 4 + ions and N atoms in FeHCF, capable of vastly strengthening the cathode's cyclic durability. Cathodes in such collaborative dual-cation electrolytes exhibit a remarkable capacity of 162 mAh g −1 (4 A g −1 ) and far prolonged operation lifespan (over 1000 cycles) when compared to single-cation cases. The assembled full cells demonstrate impressive energy densities up to 70.4 Wh kg −1 , and far superior capacity retention of 88% after all the cycling. This work may offer a simple/feasible, and effective route to render high-capacity and long-lasting cathodes for future/practical Fe-ion battery systems.
研究领域:
储能
·
电化学
·
材料科学
·
电池技术
·
可持续能源
✓ 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）