NATURE
·
2022
·Vol. 612
·期 7941
·673-678
·
IF 69.504
Xie Heping,Zhao Zhiyu,Liu Tao,Wu Yifan,Lan Cheng,Jiang Wenchuan,Zhu Liangyu,Wang Yunpeng,Yang Dongsheng,Shao Zongping
Electrochemical saline water electrolysis using renewable energy as input is a highly desirable and sustainable method for the mass production of green hydrogen 1 , 2 , 3 , 4 , 5 , 6 , 7 ; however, its practical viability is seriously challenged by insufficient durability because of the electrode side reactions and corrosion issues arising from the complex components of seawater. Although catalyst engineering using polyanion coatings to suppress corrosion by chloride ions or creating highly selective electrocatalysts has been extensively exploited with modest success, it is still far from satisfactory for practical applications 8 , 9 , 10 , 11 , 12 , 13 , 14 . Indirect seawater splitting by using a pre-desalination process can avoid side-reaction and corrosion problems 15 , 16 , 17 , 18 , 19 , 20 , 21 , but it requires additional energy input, making it economically less attractive. In addition, the independent bulky desalination system makes seawater electrolysis systems less flexible in terms of size. Here we propose a direct seawater electrolysis method for hydrogen production that radically addresses the side-reaction and corrosion problems. A demonstration system was stably operated at a current density of 250 milliamperes per square centimetre for over 3,200 hours under practical application conditions without failure. This strategy realizes efficient, size-flexible and scalable direct seawater electrolysis in a way similar to freshwater splitting without a notable increase in operation cost, and has high potential for practical application. Importantly, this configuration and mechanism promises further applications in simultaneous water-based effluent treatment and resource recovery and hydrogen generation in one step.
研究领域:
能源科学
·
材料科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
Carbon Energy
·
2025
·
IF 24.2
Ze Liu,Kaiyong Feng,Fengjun Deng,Xiaochen Zhang,Jiangchang Chen,Yingjian Yu
Silicon–air (Si–air) batteries have received significant attention owing to their high theoretical energy density and safety profile. However, the actual energy density of the Si–air battery remains significantly lower than the theoretical value, primarily due to corrosion issues and passivation. This study used various metal–organic framework (MOF) materials, such as MIL-53(Al), MIL-88(Fe), and MIL-101(Cr), to modify Si anodes. The MOFs were fabricated to have different morphologies, particle sizes, and pore sizes by altering their central metal nodes and ligands. This approach aimed to modulate the adsorption behavior of H 2 O, SiO 2 , and OH − , thereby mitigating corrosion and passivation reactions. Under a constant current of 150 μA, Si–air batteries with MIL-53(Al)@Si, MIL-88(Fe)@Si, and MIL-101(Cr)@Si as anodes demonstrated lifetimes of 293, 412, and 336 h, respectively, surpassing the 276 h observed with pristine silicon anodes. Among these composite anodes, MIL-88(Fe)@Si displayed the best performance due to its superior hydrophobicity and optimal pore size, which enhance OH − migration. This study offers a promising strategy for enhancing Si–air battery performance by developing an anodic protective layer with selective screening properties.
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
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Huachao Tao,Zhenhua Hou,Lulu Zhang,Xuelin Yang,Li-Zhen Fan
Zinc metal anode has serious dendrites and corrosion issues in the mild electrolyte, which greatly hinder the commercialization of aqueous zinc-ion batteries. Herein, zinc-amalgam (Zn 3 Hg) alloy anode has been prepared and displays a unique synergistic zinc plating/stripping and alloying/dealloying reaction mechanism. The ultrafast zinc ions diffusion in Zn 3 Hg and the alloying reaction of Zn 3 Hg with Zn ions effectively suppress the dendrites growth and skillfully address corrosion issues. Consequently, the Zn 3 Hg anode expresses long cycle life of 2000 h at 1 mA cm −2 /1 mAh cm −2 and exhibits the lowest voltage hysteresis of only 8.0 mV that we know so far. Even at 5 mA cm −2 /5 mAh cm −2 and 10 mA cm −2 /10 mAh cm −2 , the Zn 3 Hg anode also exhibits excellent cycling stability and low voltage hysteresis. Moreover, zinc ion capacitors composed of Zn 3 Hg anode and active carbon cathode still possess a specific capacity of 61 mAh/g after 5000 cycles at 1 A/g. The Zn 3 Hg anode enriches the varieties of zinc alloy anodes and provides a new development path for constructing stable and dendrite-free zinc metal anodes.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qi Li,Guizhou Liu,Shixiang Zhou,Sihan Tang,Ruiying Luo,Peng Wei,Chun Fang,Chunze Yan
Utilizing reversible Zn metal anode is the most attractive way to meet the urgent demand for rechargeable Zn-ion batteries with high energy density. For reliable and stable zinc-ion batteries, it is of particular importance to understand and prevent the issues associated with the chemically reactive, ionically blocking and mechanically unstable interfaces/interphases of the Zn metal anode. It is well known that increasing the surface area of electrode can create a more uniform ion/electron field, facilitating uniform ion deposition. However, larger surface area often exacerbates corrosion issues, and the impact of the geometric structure of electrode on ion diffusion-nucleation-growth mode remains unclear. Herein, a fast ion transport network enhanced 3D Zn anode prepared by 3D printing is reported to regulate the electrochemistry of Zn. 3D structure design help to explore the impact of geometric constraints on ion diffusion-nucleation behaviors, validating boundary conditions of nucleation theories, so as to achieve a dense and uniform deposition morphology. And the Zn(OTF) 2 -PEO hydrogel components within the 3D Zn powder electrode construct a 3D ion transport network. The hydrogel network optimizes the nucleation process by reducing the surface energy, which can address the corrosion issue caused by the increased surface area.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
AICHE JOURNAL
·
2016
·Vol. 63
·期 3
·1002-1009
·
IF 2.98
Pei Xie,Kai Wang,Peijian Wang,Yang Xia,Guangsheng Luo
Bromobutyl rubber (BIIR) is an important synthetic rubber with better vulcanizing behavior than traditional butyl rubber (IIR). It is hard to synthesize for the high reactant viscosity and strong corrosion caused by Br 2 and HBr. A microreactor platform was developed to solve the corrosion problem with cheap materials and obtain high quality BIIR based on microscaled mixing. The results showed that low reaction temperature and quickly eliminating HBr from the reacting solution were crucial to obtain high selectivity of demanded molecule structure and prevent polymer from decomposition. Owing to the corrosion resistance ability, a water assistant technology was successfully implemented in the microreactor system, which produced high quality BIIR with almost 100% selectivity and less reduced molecule weight. © 2016 American Institute of Chemical Engineers AIChE J , 63: 1002–1009, 2017
研究领域:
化学工程
·
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）