Nature Communications
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2025
·Vol. 16
·期 1
·1-10
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IF 15.7
Li Shanlin,Chen Yingyu,Wang Zhen,Wang Mengmeng,Guo Xianglin,Tang Xueqing,Wang Xiaoyu,Lai Wende,Tong Meiyun,Wang Changhong,Cong Shan,Geng Fengxia,Chen Yong,Zhao Zhigang
Electrochromic materials were discovered in the 1960s when scientists observed reversible changes between the light and dark states in WO 3 thin films under different voltages. Since then, researchers have identified various electrochromic material systems, including transition metal oxides, polymer materials, and small molecules. However, the electrochromic phenomenon has rarely been observed in non-metallic elemental substances. Herein, we propose the development of non-metallic iodine electrodeposition-based electrochromic dynamic windows using a water-in-salt electrolyte containing iodine ions. The unique electrolyte environment and solvation structure of the water-in-salt electrolyte suppress the dissolution and shuttle effect of iodine, thereby achieving a different reaction pathway compared to traditional electrolytes. This pathway involves a reversible solid-liquid transition between solid iodine and solvated iodide ions. The iodine electrodeposition-based electrochromic dynamic window demonstrates a high optical contrast of 76.0% with near colour neutrality and excellent cycling stability. A practical 400 cm 2 complementary dynamic window is fabricated to demonstrate good electrochromic performance, including high optical contrast, a near colour-neutral opaque state, fast response time, uniform modulation, and polarity-switchable functionality.
研究领域:
材料科学
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化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2025
·
IF 19
Jiaqi Zhu,Guoli Zhang,Lu Lin,Tong Qiu,Wenchao Fu,Fengzhi Liu,Baihua Qu,Dianxiao Jiang,Xiaopeng Lu,Yu Song,Xiao-Xia Liu,Xiaoyuan Zhou,Xiaoqi Sun
Rechargeable Mg batteries have gained great interest thanks to the abundant resources and high theoretical capacity of Mg metal anode. However, it suffers from severe passivation and extremely poor plating/stripping kinetics. Herein, a simple salt electrolyte system of Mg(OTf) 2 /MgCl 2 -DME is studied, and the poor Mg affinities on typical metal current collectors are revealed as the key factor for rapid cell failure. Accordingly, an interphase modification on Cu current collector by the in situ generation of a magnesiophilic Cu-thiourea (CuTU) complex is presented. It provides active sites for solvated Mg 2+ as well as Mg. This not only homogenizes Mg 2+ flux but also helps with the release of solvated species to lower the desolvation barrier. The high affinity with Mg further enables the dense and uniform growth of Mg deposits. Thanks to these merits, the facile and reversible plating/stripping of Mg is realized. As a result, the symmetric cells with Mg pre-deposited on CuTU-Cu electrodes stably operate for over 2600 h, which is a 34-fold increase in comparison to the standard Mg foil. Full cells coupling the Mg-CuTU-Cu anode and a PDI-EDA cathode with an N/P ratio of 3 deliver a high capacity of 251 mAh g −1 as well as stable cycling.
研究领域:
电化学
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材料科学
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能源存储
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金属电池
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界面工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yaqi Li,Pengjian Zuo,Ruinan Li,Hua Huo,Yulin Ma,Chunyu Du,YunZhi Gao,Geping Yin,Robert S. Weatherup
Rechargeable Mg-ion batteries typically suffer from either rapid passivation of the Mg anode or severe corrosion of the current collectors by halogens within the electrolyte, limiting their practical implementation. Here, we demonstrate the broadly applicable strategy of forming an artificial solid electrolyte interphase (a-SEI) layer on Mg to address these challenges. The a-SEI layer is formed by simply soaking Mg foil in a tetraethylene glycol dimethyl ether solution containing LiTFSI and AlCl3, with Fourier transform infrared and ultraviolet–visible spectroscopy measurements revealing spontaneous reaction with the Mg foil. The a-SEI is found to mitigate Mg passivation in Mg(TFSI)2/DME electrolytes with symmetric cells exhibiting overpotentials that are 2 V lower compared to when the a-SEI is not present. This approach is extended to Mg(ClO4)2/DME and Mg(TFSI)2/PC electrolytes to achieve reversible Mg plating and stripping, which is not achieved with bare electrodes. The interfacial resistance of the cells with a-SEI protected Mg is found to be two orders of magnitude lower than that with bare Mg in all three of the electrolytes, indicating the formation of an effective Mg-ion transporting interfacial structure. X-ray absorption and photoemission spectroscopy measurements show that the a-SEI contains minimal MgCO3, MgO, Mg(OH)2, and TFSI–, while being rich in MgCl2, MgF2, and MgS, when compared to the passivation layer formed on bare Mg in Mg(TFSI)2/DME.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Caiyun Wang,Xingxing Wu,Yufan Xia,Xuan Zhang,Hongge Pan,Mi Yan,Yong Li,Yinzhu Jiang
Mg metal anodes experience significant passivation of harmful side reactions in conventional electrolyte consisting of magnesium bis(trifluoromethane sulfonyl)imide (Mg(TFSI) 2 ) in 1,2-dimethoxyethane (DME), which critically impedes the advancement of high-performance rechargeable magnesium batteries. Herein, an innovative electrolyte system comprising an ultra-dilute 0.02 M Mg(TFSI) 2 in DME with 4-chlorobutyl methyl ether (CME) as co-solvent is strategically devised. This unique formulation effectively suppresses the formation of TFSI − -derived passivation byproducts while simultaneously facilitating the establishment of protective Cl-rich interphase, thereby achieving exceptional reversibility in Mg plating/stripping processes. Remarkably, Mg electrodes demonstrate stable cycling performance with a minimal overpotential of 70 mV at 0.1 mA cm −2 in the optimized 0.02 M Mg(TFSI) 2 -DME/CME electrolyte. More impressively, the system maintains reversible electrochemical operation for 400 h even at 2 mA cm −2 . This work presents a novel electrolyte formulation for overcoming the limitations of Mg metal anode in conventional Mg(TFSI) 2 based electrolytes, offering new perspectives for the development of next-generation rechargeable magnesium batteries.
研究领域:
电化学
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能源材料
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电池技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）