INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Yi-Ying Ma,Ze-Long Lu,Yun-Zhu Xing,Wei-Shi Zheng,Chun-Guang Liu
In this case, various characterization technologies have been employed to probe dissociation mechanism of cellulose in N , N -dimethylacetamide/lithium chloride (DMAc/LiCl) system. These results indicate that coordination of DMAc ligands to the Li + –Cl − ion pair results in the formation of a series of Li x (DMAc) y Cl z (x = 1, 2; y = 1, 2, 3, 4; z = 1, 2) complexes. Analysis of interaction between DMAc ligand and Li center indicate that Li bond plays a major role for the formation of these Li x (DMAc) y Cl z complexes. And the saturation and directionality of Li bond in these Li x (DMAc) y Cl z complexes are found to be a tetrahedral structure. The hydrogen bonds between two cellulose chains could be broken at the nonreduced end of cellulose molecule via combined effects of basicity of Cl − ion and steric hindrance of [Li (DMAc) 4 ] + unit. The unique feature of Li bond in Li x (DMAc) y Cl z complexes is a key factor in determination of the dissociation mechanism.
研究领域:
化学
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材料科学
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高分子科学
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产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-11
·
IF 14.7
Li Wei,Zhang Menghang,Sun Xinyi,Sheng Chuanchao,Mu Xiaowei,Wang Lei,He Ping,Zhou Haoshen
Li-CO 2 batteries offer a promising avenue for converting greenhouse gases into electricity. However, the inherent challenge of direct electrocatalytic reduction of inert CO 2 often results in the formation of Li 2 CO 3 , causing a dip in output voltage and energy efficiency. Our innovative approach involves solid redox mediators, affixed to the cathode via a Cu(II) coordination compound of benzene-1,3,5-tricarboxylic acid. This technique effectively circumvents the shuttle effect and sluggish kinetics associated with soluble redox mediators. Results show that the electrochemically reduced Cu(I) solid redox mediator efficiently captures CO 2 , facilitating Li 2 C 2 O 4 formation through a dimerization reaction involving a dimeric oxalate intermediate. The Li-CO 2 battery employing the Cu(II) solid redox mediator boasts a higher discharge voltage of 2.8 V, a lower charge potential of 3.7 V, and superior cycling performance over 400 cycles. Simultaneously, the successful development of a Li-CO 2 pouch battery propels metal-CO 2 batteries closer to practical application.
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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产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2023
·
IF 15.1
Quanzhen Sun,Chen Shi,Weihao Xie,Yifan Li,Caixia Zhang,Jionghua Wu,Qiao Zheng,Hui Deng,Shuying Cheng
Ion doping is an effective strategy for achieving high-performance flexible Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cells by defect regulations. Here, a Li&Na co-doped strategy is applied to synergistically regulate defects in CZTSSe bulks. The quality absorbers with the uniformly distributed Li and Na elements are obtained using the solution method, where the acetates (LiAc and NaAc) are as additives. The concentration of the harmful Cu Zn anti-site defects is decreased by 8.13% after Li incorporation, and that of the benign Na Zn defects is increased by 36.91% after Na incorporation. Synergistic Li&Na co-doping enhances the carrier concentration and reduces the interfacial defects concentration by one order of magnitude. As a result, the flexible CZTSSe solar cell achieves a power conversion efficiency ( PCE ) of 10.53% with certified 10.12%. Because of the high PCE and the homogeneous property, the Li&Na co-doped device is fabricated to a large area (2.38 cm 2 ) and obtains 9.41% PCE . The co-doping investigation to synergistically regulate defects provides a new perspective for efficient flexible CZTSSe solar cells.
研究领域:
材料科学
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太阳能
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半导体物理
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产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Shulin Li,Qiaoquan Lin,Han Yan,Qiaodong Li,Yu Yang,Xinlin Yan,Zhenyu Wang,Chuang Yu,Long Zhang
Cl-rich Li-argyrodites are one type of sulfide solid electrolytes (SSEs) with a high ionic conductivity and suitable mechanical properties for practical application. However, their tolerance against moisture in air and compatibility with metallic Li need further improvements. Here, we demonstrate that Nb-O dual-doping can be a good strategy for advanced Cl-rich Li-argyrodite SSEs, prepared by high energy ball milling and annealing method. Our results show that the Nb-O co-doping enhances the interface compatibility towards metallic Li and improves the moisture resistance, while maintains a fast ion transport. The Nb-O incorporation improves the Young's modulus and mitigates the side reaction of Li-argyrodite with Li. The doping-optimized sample demonstrates a high critical current density of 2.28 mA cm −2 and a long-term Li plating/stripping stability under a relatively high current density (1 mA cm −2 ) for nearly 3000 cycles. Notably, the corresponding all-solid-state lithium batteries (ASSLBs), using a Li metal electrode, can maintain a superior cycling stability for over 1000 cycles at 1 C.
研究领域:
材料科学
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电化学
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电池技术
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DOI
高影响因子
BIOMEDICAL CHROMATOGRAPHY
·
2023
·Vol. 37
·期 4
·e5589
·
IF 1.8
Chenchen Liu,Huiling Chen,Yida Zhang,Meng Li,Qiyao Jiang,Zhendong Wang,Liangwen Yu,Qi Wang,Huafeng Pan,Yue Zhuo
Li-Zhong-Xiao-Pi granules (LZXP) are effective for treating gastric precancerous lesions (GPL) in traditional Chinese medicine. However, the active compounds of LZXP and their potential therapeutic mechanism in GPL remained unclarified. The purpose of this study is to investigate the chemical composition and potential targets of LZXP. Based on the accurate masses, ion fragments, and literature data, a total of 128 compounds were identified in the LZXP sample using ultra-performance liquid chromatography and quadrupole time-of-flight mass spectrometry (UPLC–Q-TOF–MS) in both positive and negative ion modes, and 28 of these compounds were exactly determined by comparison with authentic reference standards. Meanwhile, 11 typical components were quantified via UPLC during a 24 min period. The linearity, accuracy, stability and recovery of the method were all proven. Through the network pharmacological analysis, six chemicals (quercetin, 4′-hydroxywogonin, sinensetin, 5, 7, 8, 3′, 4′-pentamethoxyflavanone, 8-gingerdione and quercetin) were identified as the active ingredients, and five LZXP targets (AKT1, CYP1B1, PTGS2, MMP9 and EGFR) were found to be the crucial molecules in the treatment of GPL. This study provides a systematic and applicable method for the rapid screening and identification of the chemical constituents from LZXP, and an effective understanding the mechanism of LZXP in the treatment of GPL.
研究领域:
中药学
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药理学
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分析化学
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产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2016
·Vol. 27
·期 3
·1605011
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IF 11.382
Yaxiong Yang,Yongfeng Liu,Kaichao Pu,Xing Chen,He Tian,Mingxia Gao,Min Zhu,Hongge Pan
In this study, an amorphous Li 2 CO 3 -coated nanocrystalline α-Fe 2 O 3 hierarchical structure is synthesized for the first time using a facile one-step mechanochemical process at room temperature, taking advantage of the concurrence of repeated fracture-cold welding of material's particles and a gas-solid redox reaction. The conformal coating and hierarchical structure significantly increase the cycling durability and rate capability. Typically, a 1–3 nm thick amorphous Li 2 CO 3 layer is conformally coated on Fe 2 O 3 nanocrystallines (≈10 nm in size) that form hierarchically aggregated particles 400–800 nm in size by ball milling α-Fe 2 O 3 with LiH in CO 2 . The prepared Li 2 CO 3 -coated nanocrystalline α-Fe 2 O 3 exhibits highly stable long-term cyclability as it delivers a reversible capacity of 975 mAh g −1 with 99% of retention after 400 cycles at 100 mA g −1 . At a high rate of 3000 mA g −1 , its reversible capacity still remains at 537 mAh g −1 , superior to the uncoated counterpart (311 mAh g −1 ). Moreover, amorphous Li 2 O and Li 2 CO 3 coatings are also similarly produced on Fe 2 O 3 and NiO nanocrystallines, respectively, representing the general applicability of this mechanochemical approach.
研究领域:
材料科学
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电化学
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纳米材料
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能源存储
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固态化学
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DOI
高影响因子
Journal of Energy Chemistry
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2023
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IF 13.1
Qiang Lv,Yajie Song,Bo Wang,Shangjie Wang,Bochen Wu,Yutong Jing,Huaizheng Ren,Shengbo Yang,Lei Wang,Lihui Xiao,Dianlong Wang,Huakun Liu,Shixue Dou
Solid polymer electrolytes (SPEs) are one of the most promising alternatives to flammable liquid electrolytes for building safe Li metal batteries. Nevertheless, the poor ionic conductivity at room temperature (RT) and low resistance to Li dendrites seriously hinder the commercialization of SPEs. Herein, we design a bifunctional flame retardant SPE by combining hydroxyapatite (HAP) nanomaterials with N-methyl pyrrolidone (NMP) in the PVDF-HFP matrix. The addition of HAP generates a hydrogen bond network with the PVDF-HFP matrix and cooperates with NMP to facilitate the dissociation of LiTFSI in the PVDF-HFP matrix. Consequently, the prepared SPE demonstrates superior ionic conductivity at RT, excellent fireproof properties, and strong resistance to Li dendrites. The assembled Li symmetric cell with prepared SPE exhibits a stable cycling performance of over 1200 h at 0.2 mA cm −2 , and the solid-state LiFePO 4 ||Li cell shows excellent capacity retention of 85.3% over 600 cycles at 0.5 C.
研究领域:
材料科学
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电化学
·
能源存储
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产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2021
·
IF 6.789
Ying Zhang,Yujie Luo,Shiqi Fu,Xiulong Lv,Qian He,Fangying Ji,Xuan Xu
UVC (wavelength < 280 nm) has a wide range of applications in the field of water disinfection due to its excellent bactericidal performance. In this work, we synthesized an upconversion luminescent material, β-NaYF 4 : Pr 3+ , Li + (NYF), which can generate UVC, and compounded it with a BiOCl photocatalyst to synthesize β-NaYF 4 : Pr 3+ , Li + @BiOCl (NYF-Bi) with a core-shell structure. The NYF-Bi composite material can be driven under visible light and has high photocatalytic activity . The bactericidal performance of NYF and NYF-Bi were evaluated using Escherichia coli , Staphylococcus aureus , Shigella and Salmonella . The NYF-Bi composite material killed 99.99% of E. coli under visible light (λ ≥ 420 nm) within 180 min and maintained high germicidal efficacy after 4 cycles. Finally, we deduced the sterilization mechanism of the NYF-Bi composite material through carrier dynamics studies and catching agent experiments. The death of bacteria was mainly caused by UVC light and active species , including h + , OH, and O- 2. This research provides a new material for water disinfection.
研究领域:
环境科学
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材料科学
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微生物学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2023
·Vol. 27
·期 6
·1399-1409
·
IF 2.5
Zhang Ruixin,Xie Binxuan,Rong Junfeng,Liu Lili,Hou Guolin,Chen Shimou
Polymer electrolytes with high safety and high performance are considered to be one of the most promising candidates to upgrade the traditional organic-solvent-based lithium-ion batteries. However, unlimited thermal runaway and incompatibility between electrolyte and electrode greatly limit the development of advanced polymer electrolytes. In this work, we fabricated bilayer polymer electrolytes (DLMs) with a multilevel heterostructure to achieve high-temperature self-shutdown functionality and uniform Li-ion flux. The double-layer heterostructure consists of a self-shutdown layer in contact with the cathode and an ionic liquid composite polymer layer in contact with the anode, which can achieve effective electrode–electrolyte interface contact, fast self-shutdown, and more than 900 h of stable lithium plating/stripping. In addition, the NCM523/DLM/Li battery exhibits a high reversible capacity of 129.7 mAh g −1 at 0.5 C and maintains high-capacity retention (> 89%) after 200 charge–discharge cycles. This study shows a great advantage in handling thermal abuse and a stable lithium anode, suggesting a promising approach to the high-safety lithium metal batteries.
研究领域:
材料科学
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电化学
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电池技术
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产品关联
DOI
高影响因子
Chemical Engineering and Processing-Process Intensification
·
2024
·
IF 3.8
Ying Ma,Youzhi Liu,Jiayu Li,Chengqian Zhang,Shufei Wang
The demand for lithium-ion batteries in new energy vehicles and energy storage technologies is rapidly increasing, making the efficient extraction of lithium resources from salt lakes, which are rich in lithium reserves, crucial. To address the issues of slow adsorption rate and low adsorption capacity of lithium ion sieves in the adsorption column, In this paper, the high-gravity rotating packed bed (RPB) is utilized for the first time to enhance the adsorption process of Li + on lithium ion sieve composite material(CTS/L-HMO), thereby investigating its adsorption mechanism. Specifically, CTS/L-HMO was prepared by combining manganese-based lithium ion sieves with chitosan, and used as the filler for the RPB to adsorb lithium containing solution. The research showed that chitosan successfully coated the manganese-based lithium ion sieves and the distribution of various elements was uniform. In the RPB, the adsorption capacity of CTS/L-HMO increased first and then decreased with the increase of liquid flow rate and high gravity factor. Compared to a fixed bed, the adsorption capacity and adsorption rate in the RPB increased by 43.30 % and 33.33 %, respectively. After 10 cycles of regeneration experiments, the adsorption capacity of CTS/L-HMO remained as high as 30.19 mg/g, and it exhibited high selective adsorption for Li + .
研究领域:
材料科学
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环境工程
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化学工程
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2024
·
IF 4.1
Haoyun Deng,Zhixiong Yang,Mengzhen Zhou,Encai Ou,Yanbing Lu,Qiulan Zhou,Kun Liu,Weijian Xu
( Z )-1,3-pentadiene (Zp) exhibits a rigid planar molecular structure and is known for the typical 1,5-sigmatropic hydrogen shift, while it is commonly considered an inert monomer during polymerization. Herein, by utilizing the steric effect of the terminal methyl in Zp, the high trans -1,4-polypentadiene (HTPD) with highly ordered microstructure and well-defined sequence are successfully synthesized using barium dithymol/ tert- butyllithium/ tri -ethylaluminum trimetallic initiators based on anionic polymerization. The significant dependence of polymerization rate and trans -1,4-selectivity on ratio of Ba/Al/Li is demonstrated. The modification in microstructure ( trans -1,4 content ranging from 75 % to 92 %) and stereo-regularity (isotactic triad mm % > 65 %) are confirmed by nuclear magnetic resonance (NMR). Compared with the poly(( Z )-1,3-pentadiene) (PZp) prepared by n -BuLi containing σ -ligand modifiers, the strategy using a large steric initiator to achieve regular insertion of Zp into polymer chains is proved to be effective. Kinetics studies demonstrated that Ba–Al–Li system is characterized by retarded anionic polymerization (RAP), yet it shows a quasi-living process and enabling the preparation of stereometric block polymers such as polyisoprene- b -HTPD (PI- b -HTPD). Thermal performance analysis indicates that the obtained highly ordered polymers show superior thermoplastic properties ( T m = 77.4 °C) with crystallinity as an elastomer. Furthermore, reasonable interpretations for the structure formation, sequence, and rate reduction effected by the Ba/Al/Li trimetallic initiator are proposed.
研究领域:
高分子化学
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材料科学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Hongshan Wang,Guangyong Zeng,Zhaomei Yang,Xi Chen,Ludan Wang,Yuan Xiang,Xiangdong Zeng,Zhenhua Feng,Binbin Tang,Xudong Yu,Ying Zeng
With the consumption of lithium resources increasing year by year, the investigation of high-performance salt lake lithium extraction technology is extremely important. In order to effectively separate Mg 2+ and Li + from brine, a novel charge-positive nanofiltration (NF) membrane with high permeability and excellent Mg 2+ /Li + separation factor was designed by interfacial polymerization (IP) in this work. A B15C5-MX-NF membrane was fabricated by blending hydrophilic two-dimensional (2D) MXene nanosheets into a PES membrane substrate to enhance the permeability, followed by the modification of polyamide (PA) layer with a crown ether molecule (Benzo-15-crown-5) to optimize the surface properties of membrane. The PA layer thickness was effectively reduced (58 nm) due to the enhancement in the interaction between the substrate membrane and PEI by the incorporation of MXene, while the addition of B15C5 provided additional Li + permeation channels. The B15C5-MX-NF membrane exhibited excellent permeability (16.1 L·m −2 ·h −1 ·bar −1 ) and superior selectivity for Mg 2+ /Li + ( S Li, Mg of 15.8) under the dual optimization of membrane substrate and PA layer. In addition, it was demonstrated by molecular dynamics (MD) simulations that the B15C5 molecules in the B15C5-MX-NF membranes had a specific recognition ability of Li + to allow its preferential permeation, thereby enhancing the Mg 2+ /Li + selectivity of the membranes. This study provides a new idea for the preparation of NF membranes for efficient Mg 2+ /Li + separation.
研究领域:
材料科学
·
化学工程
·
膜技术
·
环境科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）