Nature Energy
·
2024
·
IF 49.7
Xie Congxin,Wang Chao,Xu Yue,Li Tianyu,Fu Qiang,Li Xianfeng
The ever-increasing need for energy-dense batteries with high safety is fuelling global research and innovations in new redox chemistry and device design. Here we show an aqueous battery employing highly concentrated hetero-halogen electrolytes that contain I − and Br - , resulting in a multielectron transfer process of I − /IO 3 − . The intermediate bromide species IBr and Br 2 , generated during the electrochemical process, enhances the reaction kinetics and alleviates the potential gap between oxidation and reduction. When using a 6 M I − electrolyte to achieve over 30 M electron transfers, the I − /IO 3 − cathode displayed a high specific capacity of over 840 Ah l catholyte −1 . A battery with Cd/Cd 2+ as the anode demonstrated a high energy density of over 1,200 Wh l catholyte −1 . Even at an exceptionally high current density of 120 mA cm −2 , an energy efficiency of 72% was obtained. Our work demonstrates that safe aqueous batteries with high energy density are possible, offering a development option for grid-scale energy storage and even electric vehicles.
研究领域:
电化学
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能源存储
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电池技术
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材料科学
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高影响因子
JOURNAL OF POWER SOURCES
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2026
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IF 8.4
Manqi Chen,Luoting Wu,Wenjun He,Guimei Li,Suyu Chen,Jiawei Luo,Chunxia Xie,Cheng-Gong Han,Kai Zhou,Li Niu
Effectively harvesting low-grade waste heat dispersed in the surrounding environment is critical for current energy recovery. Gel thermocells, which use ions as carriers to directly convert heat into electricity, have attracted increasing attention due to their high ionic thermopower and flexibility. However, the limited availability of redox couple poses a challenge to achieving high ionic thermoelectric (i-TE) performance. Herein, we propose a new redox couple, I − /IO 3 - , effectively utilized in the i-TE gel PAM/CMC-I - /IO 3 - -[HeMIM]Cl. By combining the thermogalvanic effect and the thermodiffusion effect, the i-TE performance is enhanced, demonstrating an n-type ionic thermopower of −11.1 mV K −1 and a normalized maximum output power density of 0.47 mW m −2 K −2 at 313 K. The mechanical properties of the i-TE gel exhibit 480% strain and strong adhesion to various materials. In addition, a gel device connecting twenty-five gel thermocells in series generates a high output voltage of 2.2 V, sufficient to drive a buzzer, highlighting the application potential of the i-TE gel with the I − /IO 3 - redox couple. This work broadens the range of redox couples applicable in i-TE systems, offering versatility for designing high-performance gels.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Chenhui Yan,Bowen Zhang,Xing Ai,Chunping Xie,Tao Wang,Jinglin Huang,Guo Chen,Xiaoshan He,Yansong Liu,Zhibing He
Radioiodine anions (I and IO 3 ) pose a serious threat to the environment and human health due to their high radioactivity and solubility. Therefore, it is important to develop efficient and economical adsorbent materials for radioiodine anions. In this work, combined with the excellent properties of chitosan (CS) and (3-acrylamidopropyl) trimethylammonium chloride (AMPTAC), a novel interpenetrating network hydrogel CS@AMPTAC was synthesized to improve the adsorption efficiency of CS hydrogel for I and IO 3 . Due to the electrostatic interaction and anion exchange ability of the quaternary ammonium group (−N + (CH 3 ) 3 Cl⁻), the introduction of AMPTAC constructs a more complex and effective adsorption sites for CS@AMPTAC. Combined with the protonated amino group (−NH 3 + ) in CS, the CS@AMPTAC showed better adsorption efficiency and anti-interference performance than CS. The CS@AMPTAC hydrogel shows excellent adsorption performance over a wide pH range (pH 2–11), which overcomes the sensitivity of traditional adsorbents to pH. Meanwhile, the maximum adsorption capacities of CS@AMPTAC for I and IO 3 are 359.9 mg/g and 312.64 mg/g, respectively, which exhibits remarkable enhancements of 246.26 mg/g and 267.34 mg/g compared to CS. In addition, based on the synergistic adsorption mechanism and the hydrophilicity of CS@AMPTAC, the hydrogel can reach adsorption equilibrium within 30 min. The synergic strategy shows great potential for application in the treatment of radioiodine anions.
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CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Yi Tan,Yuxuan Chen,Renren Wang,Shouye Liu,Feiyang Hu,Quan Yu,Yawen Liu,Guangyuan Chen,Zilin Zeng,Hao Xiao,Chuan Tan,Tao Duan,Lin Zhu
Two cationic functional woods with highly density nitrogen functional group are synthesized. • Q-BW and Gua-BW exhibit the fast uptake adsorption kinetics (within 5 min) of I - and IO 3 - through strong electrostatic interactions. • Gua-BW containing guanidine groups achieves roughly ten times the maximum IO3- sorption capacity of Balsa wood via electrostatic and redox. • Gua-BW, derived from renewable Balsa wood with low cost, displays excellent adsorption capacity and favorable reusability. Compared to conventional adsorbent carriers, Balsa wood (BW) has the superiority of being low-cost and environmentally friendly. Herein, quaternary ammonium-functionalized Balsa wood (Q-BW) and guanidine-functionalized Balsa wood (Gua-BW), as two cationic functional woods, are synthesized directly from natural Balsa wood via grafting high-density nitrogen-containing groups. The two modified woods exhibited remarkably high adsorption rates for I - and IO 3 - through electrostatic interactions, reaching adsorption equilibrium within 5 min. The maximum adsorption performance reached 120 mg·g −1 for I - and 220 mg·g −1 for IO 3 - , which was 10 times higher than that of natural Balsa wood. Notably, grafting with guanidino groups endows Gua-BW with redox ability, thereby significantly enhancing its adsorption performance for IO 3 - . Furthermore, Gua-BW demonstrates excellent reusability, retaining stable adsorption efficiency after 5 cycles. As a cationic porous wood material with ultrahigh positive charge density, Gua-BW possesses properties of being green, low-cost, renewable, and having significantly higher adsorption rates for I - and IO 3 - , which provides a new approach for applications in the field of iodine-containing wastewater purification. The synthetic pathway of two cationic wood material and adsorption of iodide ions and iodate ions. Download: Download high-res image (199KB) Download: Download full-size image
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DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2025
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IF 1.6
Sun Yuchen,Guo Mingyu
In this work, we report the efficient removal of I − /IO 3 − from wastewater by tripropylamine quaternary ammonium cation based monodisperse microspheres. Benefitting from the rapid solvent exchange process and the excellent ionic selectivity of tripropylamine quaternary ammonium cation, these microspheres show capture rate of 98% for I − and 66% for IO 3 − at a concentration of 50 ppm. Meanwhile, they exhibit high adsorption capacities of 350 mg/g for I − and 370 mg/g for IO 3 − , coupling with excellent reusability. These characteristics highlight their superior practicability for removal of iodine, particularly in the context of radioactive iodine-contaminated water.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
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IF 9.5
Chenhui Yan,Junyu Li,Chuan Tan,Guangyuan Chen,Qian Zhao,Yuxuan Chen,Pan He,Yulong Luo,Tao Duan,Jiehong Lei,Lin Zhu
The efficient capture and immobilization of radioiodine (I–, IO3–) is of great importance in radioactive waste management. Here, a Cu2O-loaded three-dimensional bulk cationic hydrogel composite (Cu2O@CH) was successfully prepared by simple redox reactions and UV photopolymerization, which realized the rapid enrichment and efficient immobilization of I– and IO3–. The adsorption experiments showed that the maximum adsorption capacity of Cu2O@CH for I– in the solution at pH = 3 reached 416.5 mg/g, and the adsorption capacity of IO3– in the solution at pH = 6 could reach 313.4 mg/g. It exhibited extremely fast adsorption kinetics for I– and IO3–. In addition, Cu2O@CH also exhibited efficient I– and IO3– removal from simulated high-level liquid waste. The rapid capture and effective immobilization of radioiodine (I–, IO3–) were realized by the electrostatic interaction of −N+(CH3)3 groups in Cu2O@CH with I– and IO3–, as well as the chemical reactions between Cu2O and I–. The bulk cationic hydrogel composite explored the multifunctional role toward fast, high adsorption capability and easy handling, highlighting its superiority compared to the powder adsorbent, which renders it a potential adsorbent for the removal of radioactive iodine (I–, IO3–) in nuclear wastewater treatment.
研究领域:
环境科学
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材料科学
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核能工程
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DOI
PubMed
高影响因子
Chemistry-An Asian Journal
·
2023
·Vol. 18
·期 9
·e202300145
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IF 4.1
Hai Zou,Yunfeng Bao,Shiwen Du,Xueshang Xin,Yu Qi,Guosheng Shao,Fuxiang Zhang
Graphical A visible-light-responsive photocatalyst based on nitrogen-doped bulk oxide YTaO 4− x N y was synthesized and used as an H 2 evolution photocatalyst for Z-scheme overall water splitting coupling with the PtO x /WO 3 as the O 2 evolution photocatalyst and the I − /IO 3− as the shuttle ions. Nitrogen doping into oxide has been proved to be an effective strategy to extend visible-light utilization of oxides with layered or channeled structure, but it is shortage for the bulk oxides free of layered or channeled structure. Here, we report a novel nitrogen-doped bulk oxide (denoted as YTaO 4− x N y ) with good visible light response. As benefited from the strong hybridization of N 2 p and O 2 p electronic state according to the density functional theory (DFT) calculations, the band gap (3.6 eV) of YTaO 4 precursor was sharply narrowed to 2.4 eV on YTaO 4− x N y due to the obvious uplift of the valence band maximum (VBM). After decorated with the platinum cocatalyst, the Pt/YTaO 4− x N y was used as the H 2 -evolving photocatalyst for assembly of Z-scheme overall water splitting system by coupling with the PtO x /WO 3 as the oxygen evolution photocatalyst and using the I − /IO 3− as the shuttle ions. This work enriches the material database of nitrogen-doped oxide with wide visible light absorption and shows its promising application in solar-to-chemical conversion.
研究领域:
材料科学
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光催化
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可再生能源
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）