Advanced Energy Materials
·
2022
·Vol. 12
·期 40
·2201800
·
IF 29.698
Jie Chen,Zexiao Cheng,Yaqi Liao,Lixia Yuan,Zhen Li,Yunhui Huang
Li metal batteries have suffered from dendrite growth and its derived dead Li formation for a long time. A new lithium restoration method through the shuttling of redox mediators has been proposed recently. However, the side reaction of severe self-discharge often occurs when some redox mediators are used. Here, a selection principle of redox mediators for reactivating dead Li in lithium metal batteries is put forward, which is able to reactivate the dead Li effectively and reduce the self-discharge at the same time. Three redox mediators of ferrocene (Fc), 10-methylphenothiazine (MPT), and thianthrene (Th) with different redox potentials are tested in LiFePO 4 |Cu anode-free Li metal batteries to clarify the selection principle. Furthermore, 2,2,6,6-tetramethylpiperidinooxy (TEMPO), which is speculated to be a suitable one for reactivating dead Li in lithium metal batteries, is verified. This work provides a universal selection principle of redox mediators and may boost its practical application in Li metal batteries.
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DOI
高影响因子
Food Chemistry: Molecular Sciences
·
2021
·
IF 0
Haoyuan Yin,Haijun Chi,Zhuye Shang,Ali Qaitoon,Jianfei Yu,Qingtao Meng,Zhiqiang Zhang,Hongmin Jia,Run Zhang
Responsive small-molecule fluorescence probe specific for target analyte detection is an emerging technology for food safety and quality analysis. In this work, we report a new water soluble small-molecule fluorescence probe ( PG ) for the detection of hypochlorous acid (HOCl) in drinking water samples. Probe PG was developed by coupling of a glucosamine into 10-methyl-10H-phenothiazine fluorophore with a HOCl-responsive C=N bond. The thioether is another recognition site that can be oxidized to be sulfoxide in water. Due to the specific reactions triggered by HOCl, probe PG ’s absorption band is blue shifted from 388 to 340 nm, and fluorescence at 488 nm is more than 55-fold enhanced. Probe PG features high fluorescence stability in PBS buffer with varied pH, fast response and high selectivity to HOCl. The application of the probe PG for HOCl detection in real-world samples is demonstrated by HOCl detection in drinking water, including tap water, purified water, and spring water samples. The recoveries of this method for HOCl detection in drinking water are in the range of 99.17–102.3%. This work thus provides a new method for HOCl detection in drinking water with high precision and accuracy.
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DOI
PubMed
Science China-Materials
·
2025
·
IF 7.4
Su Yi,Zheng Zefei,Sun Lingjie,Sun Wenzhe,Zhang Yongqi,Liu Huapeng,Yang Chenfei,Li Shouzhen,Wang Miaoyu,Chen Xing,Ding Shuaishuai,Yang Fangxu,Zhang Xiaotao
Organic cocrystals have become increasingly prevalent in a variety of research domains, owing to the simple preparation, cost-effectiveness, and highly tunable properties. Particularly, the strong charge transfer (CT) interactions in cocrystals render them promising candidates for high-efficiency photothermal conversion materials. However, the majority of reported organic photothermal cocrystals exhibit planar and rigid π-conjugated structures, which restrict molecular vibrations while simultaneously impeding non-radiative dissipation processes—ultimately hindering the enhancement of photothermal conversion performance. Herein, we design a novel non-planar photothermal NMTQ cocrystal, which shows a broadband absorption range of 220–2000 nm and high photothermal conversion efficiencies from ultraviolet (UV) to near-infrared (NIR)-II region. Quantum chemical calculations have been utilized to demonstrate that the distorted butterfly-like conformation in NMTQ is conducive to non-radiative transitions via higher non-adiabatic couplings (NACs) and lower spatial overlap integral ( S r ). An interfacial solar evaporation system was constructed using NMTQ cocrystals, achieving an evaporation rate of 2.158 kg m −2 h −1 with 94.96% solar-to-vapor conversion efficiency under 1 Sun irradiation. The photothermal platform demonstrated simultaneous contaminant removal functionality, establishing a sustainable strategy for clean water production through rational photothermal material design.
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Energy Storage Materials
·
2025
·
IF 20.2
Rongfeng Yang,Fan Wang,Wan-er Cui,Wei Chen,Tianyu Lei,Dongjiang Chen,Dongxu Chen,Li Xia,Chi Zhang,Kaijun Cheng,Runyi Dai,Yichao Yan,Xiaobin Niu,Yin Hu
Lithium sulfur batteries are persistently investigated by the research community due to their high energy density property. However, in order to get such performance, based on the current pouch cell strategy, less electrolyte and more stacking electrodes need be applied, leading to the aggravated dendrite growth, dead lithium accumulation and electrolyte depletion. In this context, we report a regenerative redox mediator strategy, targeting the operation window of the lithium sulfur batteries. The redox mediator can spontaneously consume the dead lithium on the anode, then be re-oxidized on the cathode through electrochemical process. Based on this design, the lithium sulfur pouch cell can be fully charged at 1C for more than 140 cycles. Moreover, the regeneration mechanism is studied by in situ UV–vis spectroscopy. This work not only validates the effectiveness of redox mediator for improving the high rate charging and cycling of lithium sulfur pouch cells, but also excludes the invalid mediator type and provides the design concept, guiding the future development of high rate charging strategy for lithium sulfur batteries.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Haiyan Ma,Yuyao Li,Xianjing Zhang,Ling Yan,He Gao,Lan Liu,Longbin Xu
Hypochlorous acid (HClO), an important reactive oxygen species and widely used disinfectant, plays dual roles in immune defense and oxidative injury, while its uncontrolled accumulation poses serious threats to human health and environmental safety. Thus, rapid, selective, and field-deployable detection strategies are urgently required. Here, we report a phenothiazine-benzothiazole fluorescent probe (PTMB) that achieves ultrafast (<5 s), highly selective, and sensitive detection of HClO, featuring a large Stokes shift (130 nm) and an ultralow detection limit of 39.1 nmol L −1 . To extend practical applicability, PTMB was embedded into an agarose hydrogel, yielding a portable, smartphone-readable platform for real-time and semi-quantitative HClO monitoring via RGB-based chromatic analysis. This gel sensor enabled accurate detection in diverse water samples with excellent recovery and reproducibility. Furthermore, PTMB exhibited low cytotoxicity and efficient cellular uptake, enabling dynamic fluorescence imaging of exogenous HClO in living cells. By uniting molecular probe design, gel encapsulation, and digital quantification, PTMB provides a robust dual-mode platform for environmental monitoring and biological imaging, offering a blueprint for next-generation portable sensing technologies.
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PubMed
高影响因子
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