Advanced Science
·
2024
·
IF 14.3
Jing Hu,Pengfei Wang,Jianbo Hu,Menglian Zheng,Mingdong Dong
The development of membranes with rapid and selective ionic transport is imperative for diverse electrochemical energy conversion and storage systems, including fuel cells and flow batteries. However, the practical application of membranes is significantly hindered by their limited conductivity and stability under strong alkaline conditions. Herein, a unique composite membrane decorated with functional Cu 2+ cross-linked chitosan (Cts-Cu-M) is reported and their high hydroxide ion conductivity and stability in alkaline flow batteries are demonstrated. The underlying hydroxide ions transport of the membrane through Cu 2+ coordinated nano-confined channels with abundant hydrogen bonding network via Grotthuss (proton hopping) mechanism is proposed. Consequently, the Cts-Cu-M membrane achieves high hydroxide ion conductivity with an area resistance of 0.17 Ω cm 2 and enables an alkaline zinc-based flow battery to operate at 320 mA cm −2 , along with an energy efficiency of ≈80%. Furthermore, the membrane enables the battery for 200 cycles of long-cycle stability at a current density of 200 mA cm −2 . This study offers an in-depth understanding of ion transport for the design and preparation of high-performance membranes for energy storage devices and beyond.
研究领域:
材料科学
·
电化学能源
·
纳米技术
✓ 已验证
DOI
高影响因子
Energy Materials
·
2025
·Vol. 5
·期 7
·N
·
IF 11.2
Feiyang Hu,Zhiwen Cui,Zhen Dong,Liyuan Jiang,Nwaji Njemuwa Njoku,Wenzhang Dong,Hao Fan,Mahalingam Ravivarma,Jianbao Wu,Duanyang Kong,Jiangxuan Song
Aqueous Zn-based flow batteries often face issues such as poor reversibility and short lifespan due to irregular Zn deposition and detrimental side reactions. To address these challenges, we developed a zwitterionic gemini additive, N,N′-bis(3-propanesulfonic acid)-3,3′-bipyridinium (SPr-Bpy), to enhance Zn plating/stripping behavior and optimize the Zn2+ solvation structure. The dual sulfonate groups influence the Zn2+ solvation shell and anchor SPr-Bpy to the Zn surface through multi-site interactions. Additionally, the bipyridinium structure forms an electrostatic shielding layer, suppressing excessive Zn2+ accumulation, promoting uniform Zn deposition, and thus mitigating dendrite formation and hydrogen evolution. Consequently, the Zn||Zn symmetric cells exhibit an impressive lifespan of 250 h, while the Zn||Cu asymmetric cells achieve a high average Coulombic efficiency of 99.8% over 450 cycles. Moreover, SPr-Bpy significantly improves Zn/TEMPO flow battery performance, achieving a high areal capacity of 24.4 mAh cm-2 with an exceptional capacity retention of 99.992%/cycle over 500 cycles.
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
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Pengfei Wang,Kun Zhang,Jing Hu,Menglian Zheng
Zinc-based flow batteries hold great promise for grid-scale energy storage. However, the formation of zinc dendrites challenges their lifespan and safety. In this work, we devise a bimetallic organic framework material on carbon cloth (CuZn@MOF-CC) using a one-step dip coating method to address the dendrite issue. The prepared CuZn@MOF-CC promotes the creation of zincophilic sites on the electrode surface, facilitating smooth and uniform zinc deposition. Electrochemical csharacterizations and density functional theory (DFT) calculations reveal much stronger electronic interactions between CuZn@MOF and the zinc atoms compared to the commonly used anode material through an obvious electron interaction between the Zn atom and the Cu sites linked in the CuZn@MOF chain. By mitigating the zinc dendrite problem, this approach effectively improves the coulombic efficiency, cycle life, and safety of zinc-based flow batteries. The battery incorporating the prepared material demonstrates impressive stability, exceeding 450 cycles without dendrites at a high current density of 320 mA cm −2 , paving the way for efficient and reliable energy storage solutions and a sustainable future.
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 MEMBRANE SCIENCE
·
2025
·
IF 9
Shuhao Lin,Xin Liu,Kenan Xu,Kaiwen Wang,Nana Chang,Yixing Wang,Kang Huang,Weihong Xing,Zhi Xu
Alkaline zinc-based flow batteries (AZFBs) have emerged as a promising candidate for large-scale energy storage due to their low cost and high energy density. However, the pursuit of high power density in AZFBs has been hindered by the lack of ion conductive membranes (ICMs) capable of delivering high and stable ion conduction, a challenge that has yet to be fully addressed. Herein, we designed an innovative sulfonated hollow carbon sphere (SHCS)-embedded ICM designed specifically for AZFBs. By combining a hydrophilic polymer with SHCS, the membrane achieved exceptional ion conductivity through dual ion conduction channels. The sulfonic acid groups on SHCS and the polymer side chains created interconnected water networks, enabling efficient ion transport. Additionally, hollow structure and alkali resistance of SHCS provided stable ion pathways. As a result, the proposed membrane exhibited a superior OH − conductivity of 10.28 mS cm −1 , surpassing the pure polymer membrane (4.69 mS cm −1 ). In AZFB tests, it achieved an 88.9 % voltage efficiency at 80 mA cm −2 and operated for over 1570 cycles (1130 h). This work offers a breakthrough in designing high-performance ICMs, advancing high power density AZFBs for energy storage.
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
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Tao Xuan,Xusheng Cheng,Liwei Wang
The practical implementation of Zn-based flow batteries encounters the challenges associated with uneven deposition of Zn ions and undesirable side reactions. Here, a hybrid Zn-based electrolyte system composed of ZnBr 2 , ethylene glycol (EG), H 2 O and potassium gluconate (KGlu) is developed as anolyte to modulate the solvation structure and interface engineering for a sustainable Zn-based flow battery. The EG molecules could exclude water molecules outside the solvation structure, inhibiting the water-induced side reactions and Zn corrosion. Moreover, the incorporation of potassium gluconate constructs an artificial stable anionic interface for dendrite-free Zn deposition. Chemical stability and hydrogen evolution potential tests demonstrate that the activity of water molecules could be suppressed in the EG-containing hybrid electrolyte. Deposition morphologies and Zn//Zn symmetric flow battery tests also reveal that gluconate anions preferentially adsorbed on zinc anode could effectively facilitate uniform zinc deposition. As a result, the Zn-based flow battery with the proposed hybrid electrolyte delivers a stable cycling performance over 200 cycles and high reversibility with an average CE of over 97.4 % at 20 mA cm −2 , exhibiting a peak power density of 103.2 mW cm −2 . This work provides a universal electrolyte design strategy for realizing a sustainable Zn-based flow battery.
研究领域:
储能技术
·
电化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
AICHE JOURNAL
·
2022
·Vol. 68
·期 9
·e17738
·
IF 4.167
Xiaoxuan Hou,Kang Huang,Yongsheng Xia,Feiyan Mu,Hongyan Cao,Yu Xia,Yulin Wu,Yuqin Lu,Yixing Wang,Fang Xu,Ying Yu,Weihong Xing,Zhi Xu
Zinc-based flow batteries receive widespread attention due to their advantages of low cost and high energy density. However, zinc dendrites are easy to appear during the charge process, pierce the membrane and thus destroy the battery, which seriously restrict its further development. In this article, MFI-type zeolite nanosheets ( ns -MFIs) with high mechanical strength and hydrophobicity are in situ introduced to porous polymer membranes, which spontaneously form turnup fish-scale-like structure through the one-step phase inversion/surface segregation process. This special structure well disperses mechanical energy to provide effective protection characteristics to resist the penetration of zinc dendrites, and meanwhile promotes the uniform zinc depositions on the electrode by alleviating the water migration and accelerating zincate ion diffusion, so as to prolong the cycle life of the battery for more than 600 cycles, which is 4 times and 2.5 times longer than the commercial Nafion 212 and pristine porous polymer membrane, respectively. Moreover, the sub-nano size pores and high-aspect-ratio of ns -MFIs afford membranes extra ion sieving ability and transport area for the charging-balancing ions OH − to ensure superior battery performance, delivering an average coulombic efficiency (CE) of ~98.5%, voltage efficiency (VE) of ~83.2%, and energy efficiency (EE) of ~81.9% at 80 mA/cm 2 .
研究领域:
材料科学
·
电化学
·
储能技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Fujun Chu,Leibin Guo,Shaocong Wang,Yuanhui Cheng
Aqueous zinc-based flow batteries have received considerable attention for large-scale energy storage due to their low cost, high safety and readily available raw materials. However, zinc dendrites shorten the battery's cycle life and limit the battery's specific capacity. Herein, we design a zinc slurry anode with 3D interconnected electron-ion networks to achieve high areal capacity and uniform distribution of reactive zinc. Multi-layered graphitic felt builds abundant avenues for electron transfer , and zinc slurry offers massive ions transfer channels. The capacity is up to 100 mAh cm −2 , which is among the highest values in zinc-based flow batteries. The assembled zinc-iron flow battery delivers high coulomb efficiency of 100% and energy efficiency of 85-90%, respectively. Additionally, zinc-iron flow batteries show outstanding cycle stability over 580 h without performance degradation . This work proposes a novel avenue to solve the critical problems of low areal capacity and short cycle life, caused by limited zinc deposits and dendrites at anodes.
研究领域:
储能技术
·
电池技术
·
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）