Journal of Materials Chemistry A
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2024
·Vol. 12
·期 10
·5768-5777
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IF 10.7
Liwei Su,Yijuan Zhu,Xingyi Zhan,Kang Yu,Tianyu Guo,Ke Gu,Hao Wu,Lianbang Wang,Yuanhao Wang,Xiaoxiang Wang
The practical application of polyethylene oxide (PEO) based solid-state electrolytes is severely limited by their low room-temperature ion transport, narrow electrochemical window, and unstable Li/PEO interfaces. This work introduces pentafluorobenzene boronic acid (PFBBA), with –C6F5 and –B(OH)2 ligands, as an advanced additive to resolve these problems. At 30 °C, the electrolyte containing 1.0% PFBBA shows the best performance with an ionic conductivity of 3.09 × 10−5 S cm−1, an Li+ ion transference number of 0.342, and an electrochemical window up to 5.0 V (vs. Li/Li+). The Li//Li battery can stably deposit/peel Li for 1000 h without a short circuit. The reversible capacity of Li//LiFePO4 full batteries at 0.5C after 500 cycles is 124.8 mA h g−1. The modification mechanism is studied by experimental and computational methods. The electron-withdrawing –C6F5 endows B in PFBBA with stronger Lewis acidity and better affinity with F in LiTFSI by forming π–π coordination. The hydrogen bonding interaction between B–OH in PFBBA and –O– in PEO changes the crystallinity of PEO. These two aspects enhanced Li+ ion transport and widened the electrochemical stability window. More importantly, PFBBA participates in in situ forming a LiF/Li–B–O rich SEI layer on the Li anode surface, enhancing the SEI film's mechanical strength and Li+ ion flux.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
·
IF 4.65
Shijie Gu,Yingyue Cui,Kaihua Wen,Shimou Chen,Jianling Zhao
Layered lithium/manganese-rich oxides (LMR) receive much attention due to its high specific capacity (∼300 mAh g -1 ). However, the serious capacity degradation during cycling hinders the commercial application of the LMR. Herein, 3-cyano-5-fluorophenylboronic acid (CFBA) was applied as an electrolyte additive for enhancing the cycling stability of LMR at high voltage. Linear sweep voltammetry (LSV), density function theory (DFT) calculations and the initial charge d Q /d V profiles indicate that the preferential oxidation of CFBA can improve the oxidative stability of electrolyte. By adding 0.7 wt% CFBA into standard (STD) electrolyte (1 M LiPF 6 in EC :EMC:DMC = 1:1:1, by weight), the LMR/Li half-cell delivered a discharge capacity of 245 mAh g -1 with a capacity retention of 88.4% after 200 cycles at 0.5C, while only 68 mAh g -1 with 25.2% retention in STD electrolyte. Further characterizations and theoretical calculation illustrate that CFBA can effectively eliminate the harmful HF, which improve the electrochemical performance . More importantly, the CFBA participates in the formation of a thin and uniform protective cathode-electrolyte interface (CEI) film on the surface of LMR, which effectively suppresses electrolyte decomposition and protects the structural integrity of LMR.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2023
·Vol. 35
·期 19
·2211330
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IF 29.4
Minhui Lu,Xiaoxuan Zhang,Dongyu Xu,Ning Li,Yuanjin Zhao
Detection of biomarkers associated with wound conditions provides in-depth healthcare information and benefits wound healing treatment. The current aim of wound detection is to achieve in situ multiple detections. Novel encoded structural color microneedle patches (EMNs) combining photonic crystals (PhCs) and microneedle arrays (MNs) for multiple wound biomarker detection in situ are described here. Using a partitioned and layered casting strategy, the EMNs can be divided into different modules and each serves for the detection of small molecules , including pH, glucose, and histamine. pH sensing is based on the interaction between hydrogen ions and carboxyl groups from hydrolyzed polyacrylamide (PAM); glucose sensing is achieved with the help of glucose-responsive fluorophenylboronic acid (FPBA); while histamine sensing relies on specific recognition of aptamers and target molecules. Owing to the responsive volume change of these three modules in the presence of target molecules, the EMNs can create structural color change and characteristic peak shift of the PhCs, thus realizing the qualitative measurement of target molecules with a spectrum analyzer. It is further demonstrated that the EMNs behave well in the multivariate detection of rat wound molecules. These features indicate that the EMNs can be valuable smart detection systems for wound status screening.
研究领域:
生物医学工程
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材料科学
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分析化学
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伤口愈合
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2021
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IF 7.514
Hongwei Zheng,Hong Lin,Xiangfeng Chen,Jianxin Sui,Mati Ullah khan,Tushar Ramesh Pavase,Xiangning Han,Limin Cao
Rapid detection of pathogenic bacteria particularly in food samples demands efficient separation and enrichment strategies. Here, hydrophilic temperature-responsive boronate affinity magnetic nanocomposites were established for selective enrichment of bacteria. The thermo-responsive polymer brushes were developed by surface-initiated atom transfer radical polymerization of N -isopropylacrylamide (NIPAm) and allyl glycidyl ether (AGE), followed by a reaction of epoxy groups, and incorporation of fluorophenylboronic acid. The physical and chemical characteristics of the magnetic nanocomposites were analyzed systematically. After optimization, S. aureus and Salmonella spp. showed high binding capacities of 32.14 × 10 6 CFU/mg and 50.98 × 10 6 CFU/mg in 0.01 M PBS (pH 7.4) without bacteria death. Bacterial bindings can be controlled by altering temperature and the application of competing monosaccharides. The nanocomposite was then utilized to enrich S. aureus and Salmonella spp. from the spiked tap water, 25% milk, and turbot extraction samples followed by multiplex polymerase chain reaction (mPCR), which resulted in high bacteria enrichment, and demonstrated great potential in separation of bacteria from food samples.
研究领域:
材料科学
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纳米技术
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生物技术
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食品安全
✓ 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）