Nature Communications
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2025
·Vol. 16
·期 1
·1-8
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IF 15.7
Sun Wenlu,He Yulu,Fang Lei,Zeng Jinrong,Tang Enli,Hu Tingping,Zhang Hui,Lu Derong,Hu Chenji,Quan Zhilong,Kong Huabin,Chen Hongwei
Enhancing the durability of electrodes under high-power conditions is crucial for advancing high-power secondary batteries. Despite numerous optimization strategies proposed to mitigate electrode structural degradation, the performance of common electrodes inevitably deteriorates under high currents over extended cycling life. In this study, we report a capacity refreshing strategy for a porous organic framework electrode operating under high power conditions. By intermittently applying low currents, deactivated ions trapped within the framework can be effectively released, thus refreshing the electrode’s capacity. Importantly, this capacity refreshing can be periodically repeated. The framework electrode thus achieves an extended cycle life of over 60,000 cycles at 20 C (6 A/g) with a specific power of 28 kW/kg (based on active material). This strategy represents an alternative concept for designing organic electrodes that combine high power and long cycle life.
研究领域:
材料科学
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电化学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Zheng-Hong Liang,Rui Feng,Jia-Min Wu,Dong Li,Fang Wang,Xiu-Li Wang,Yu-Zhong Wang,Fei Song
Since the global water shortage, fog collection based on functional materials and surfaces has become one of the most potential ways to relieve the crisis. However, further improving the water collection efficiency through elaborate designs of material structures still encounters a bottleneck. Here, we present a temperature gradient-induced strategy for enhancing water collection from fog. Such a temperature modulation generates increases in the fog collection efficiency and surface-refreshing frequency by 25% and 217%, respectively. Scattering measurements show that the movement velocity of fog particles near cooling surfaces is increased by approximately 150%. Based on the theory of heat transfer and thermophoresis, the temperature field acting on fog particles is analyzed, deducing that the enhanced fog-collection performance results from thermophoretic forces generated by temperature gradients. This work offers a new approach for designing next-generation fog-collection devices and manipulating particle motions.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 32
·期 2
·2107424
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IF 18.808
Weiqing Chen,Min Zhou,Yang Liu,Xue Yu,Chaojie Pi,Ze Yang,Hao Zhang,Zhichao Liu,Ting Wang,Jianbei Qiu,Siu Fung Yu,Yang (Michael) Yang,Xuhui Xu
Halide perovskites are an emerging scintillator material for X-ray imaging. High-quality X-ray imaging generally requires high spatial resolution and long operation lifetime, especially for targeted objects with irregular shapes. Herein, a perovskite “polymer–ceramics ” scintillator, in which the halide perovskite nanocrystals are grown inside a pre-solidified polymer structure with high viscosity (6 × 10 12 cP), is designed to construct flexible and refreshable X-ray imaging. A nucleation inhibition strategy is proposed to prevent the agglomeration and Ostwald ripening of perovskite crystals during the subsequent precipitation process, enabling a high-quality polymer–ceramics scintillator with high transparency. This scintillator-based detector achieves a detection limit of 120 nGy s –1 and a spatial resolution of 12.5 lp mm –1 . Interestingly, due to the anchoring effect of the exfoliated atoms provided by the polymer matrix, the scintillator film can be refreshed after a long duration (≥3 h) and high dose (8 mGy s –1 ) irradiation. More importantly, this inherent characteristic overcomes the long operation lifetime issue of perovskites-based scintillators. Hence, the authors’ exploration of the polymer–ceramics scintillator paves the way for the development of flexible and durable perovskite scintillators that can be produced at a low operation cost.
研究领域:
材料科学
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医学影像
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物理学
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DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2024
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IF 6.5
Xinlin Li,Bin Zhan,Zhengxian Liu,Dongsong Wei,Yan Liu,Yanju Liu,Jinsong Leng
Ice accumulation may occur on various equipment, leading to poor operational performance. Superhydrophobic surfaces have been proven to be potential candidates for anti-icing applications, but they suffer from functional degradation under extreme conditions. In this study, four hybrid wetting surfaces with different patterns were prepared, including triangle (Surf-T), square (Surf-S), hollow square (Surf-HS), and hollow ring (Surf-HR). The superhydrophobic regions of CNT@PDMS coatings and the superhydrophilic micropatterns of AA7075 were exposed using a simple laser ablation method. The dynamic properties of impinging water droplets on different hybrid wetting patterns of sharp corners were discussed. The results showed that the Surf-S exhibited a shorter detaching time of 18.7 ms and achieved maximum rebound height. At the microscale, the superhydrophilic patterns could accelerate the coalescing process of anchored water droplets, leading to the formation of water-free regions and self-refreshing properties. Moreover, the good photothermal effect of superhydrophobic regions endowed Surf-S with improved de-icing efficiency, resulting in the melting of small ice particles within 10 s. This study proposed a novel strategy for designing and fabricating hybrid wetting surfaces with good icephobic potentials.
研究领域:
材料科学
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表面工程
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DOI
高影响因子
Catalysis Science & Technology
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2022
·Vol. 12
·期 16
·5009-5020
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IF 6.177
Yujiao Zhu,Qingming Chen,Chi Chung Tsoi,Xiaowen Huang,Abdel El Abed,Kangning Ren,Shao-Yuan Leu,Xuming Zhang
The chloroplast of plants is a natural microfluidic reactor for natural photosynthesis, in which the multi-enzymatic Calvin cycle is the key. In the chloroplast, the Calvin cycle enzymes are reportedly attached to the thylakoid membrane by physical interactions. To mimic this process, we physically immobilized the first enzyme of the Calvin cycle, D-ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO), into microfluidic reactors by injecting 2 μg μL−1 RuBisCO for 4 h and demonstrated the successful production of the glucose precursor, 3-phosphoglycerate, at 0.145 ± 0.008 nmol min−1. Hydrophobic interactions play an important role in the physical immobilization, making the process simple and fast. The physical immobilization presents a 5.7-fold thermal stability as compared to the free RuBisCO, and shows performances inferior but close to that of chemical immobilization in enzyme kinetics, production rate and stability. Although the reactors can retain only 40% of the initial activity after 10 cycles of reusing, the physical immobilization has an interesting special feature that the enzyme can be desorbed to refresh the reactor for new immobilization. Experiments show that >95% activity can be restored after 5 cycles of refreshing. With the merits of reusing and refreshing, up to 5 mL of 3-PGA can be produced by continuously injecting the reactant mixture with great sustainability and cost-effectiveness. The reactors are also scaled out to two and six parallel reactors as a proof of concept of large-scale synthesis. Physical immobilization in microfluidic reactors is highly suitable for the multi-enzymatic, cascaded reactions in the Calvin cycle and facilitates the future study of artificial synthesis of glucose.
研究领域:
生物化学
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生物技术
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微流控
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酶工程
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合成生物学
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DOI
高影响因子
Nature Electronics
·
2024
·Vol. 7
·期 6
·487-496
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IF 33.7
Gao Yun,Li Hongjin,Dai Xingliang,Ying Xingjian,Liu Zhe,Qin JiaJun,Guo Jie,Han Zhongkang,Zhang Yujing,Zhu Meiyi,Wu Xiaohui,Cai Qiuting,Yang Yixing,Feng Linrun,Zhang Xiaoyu,Huang Jingyun,He Haiping,Gao Feng,Ye Zhizhen
Perovskite light-emitting diodes (PeLEDs) could be of use in the development of active-matrix displays. However, due to ion migration in crystal structure, PeLEDs have electroluminescence rise times over milliseconds, which is problematic for the development of high-refresh-rate displays. Here, we show that the electroluminescence rise time of PeLEDs can be reduced to microseconds using an individual-particle passivation strategy. The approach is based on BF 4 − ions that can passivate every nanocrystal in a perovskite emissive layer during film deposition. It leads to a defect-free film with discrete nanostructure and excellent crystallinity, which inhibits ion migration. Our strategy can be applied in perovskite nanocrystal films with different colours: red (635 nm), green (520 nm) and blue (475 nm). These PeLEDs all demonstrate response times within microseconds and high external quantum efficiencies of 22.7%, 26.2% and 18.1%, respectively. This allows us to create microsecond-response active-matrix PeLEDs that exhibit external quantum efficiencies above 20% at a display brightness of 500–3,000 cd m −2 for green devices with a resolution of 30 pixels per inch. We also develop microsecond-response red, green and blue active-matrix displays with 90 pixels per inch.
研究领域:
材料科学
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光电技术
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显示技术
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DOI
高影响因子
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