JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2016
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IF 1.835
Dawei Li,Guangqian Li,Pingfeng Bian,Zhe Shen,Mengfan Fu,Wenjun Fang,Weidong Yan
Epigallocatechin gallate (EGCG) is the most abundant and active components in tea. In this text, the density and viscosity of ternary aqueous solution of EGCG containing LiCl/NaCl/KCl were determined at temperatures ranging from 288.15 to 308.15 K at atmospheric pressure. The density data was used to compute the apparent molar volumes (Vφ), limiting partial molar volumes (Vφ0), and transfer partial molar volumes (ΔtrsVφ0). The viscosity B-Coefficients were calculated from the measured viscosity data using the extended Jones–Dole equation. The values of density and viscosity increased continuously with the increasing of molality of EGCG and decreased with the temperature increasing. The positive values including (Vφ, Vφ0, ΔtrsVφ0, viscosity B-Coefficients, the free energies of activation for solvent Δμ10≠, and for solute Δμ20≠) and Helper’s constant (∂2Vφ0/∂T2)p close to zero indicated the presence of strong solute–solvent interactions and the structure–making effect of EGCG in the investigated solutions. The apparent molar isobaric expansions (Eφ0) decreasing with temperature suggested that the solute–solvent interactions became weaker as temperature increased. These significant parameters could provide necessary data about molecular interactions occurring in simulated body fluids.
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高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Min Sun,Zhijun Liang,Rui Zhang,Kai Zhang,Kai kai Ba,Yanhong Lin,Dejun Wang,Tengfeng Xie,Yu Zhang
Recently, constructing heterostructures at the working electrode has emerged as a promising technique in energy storage. This approach utilizes the interfacial energy level difference between two semiconductors to enhance charge transfer and improve Li + diffusion kinetics. In this work, we employed an in-situ hydrothermal method to successfully fabricate TiO 2 /MoO 3 heterostructured electrodes. The resulting interface driving force of approximately 0.54 V exhibited a significant enhancement in charge transfer and demonstrated superior Li + storage performance compared to individual MoO 3 electrodes. Additionally, the incorporation of TiO 2 effectively reduced volume expansion, enhancing the stability of the electrode material. As expected, the heterostructure electrode TiO 2 /MoO 3 (x = 10) exhibits the highest specific capacitance of 606.36 F·g −1 . Our further fabricated asymmetric supercapacitor TiO 2 /MoO 3 (x = 10)//PPy device presents an energy density of 42.28 Wh·kg −1 , which is 1.57-fold higher than that of the MoO 3 //PPy device. This study introduces a methodology that enhances the efficiency and accessibility in the process of creating electrode materials, thereby offering a more streamlined and user-friendly avenue for the advancement of supercapacitor.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
·
IF 20.2
Hao Wang,Nanping Deng,Yayi Lu,Yongbing Jin,Geng Li,Bowen Cheng,Weimin Kang
In this study, the CoP-Co 2 P heterojunction nanoparticles embedded in N-doping porous carbon nanofibers (CoP-Co 2 P/NPCNFs) are designed and prepared. The highly conductive grid of NPCNFs can physically confining lithium polysulfide (LiPS) and provide facilitated channels for Li + transport. Furthermore, due to the spontaneous built-in electric field (BIEF) based on at the formed heterogeneous interfaces of CoP-Co 2 P, the heterojunction can significantly catalyze bi-directional conversion of LiPS and chemically adsorb LiPS which confirmed by the DFT calculations, suppressing the “shuttle effect” of LiPS. Thus, the Li-S batteries with the CoP-Co 2 P/NPCNFs modified separators exhibit a high initial specific capacity of 1322.86 mAh g −1 at 1 mA cm −2 and stable 695 cycles with a low decay rate (0.069 %). More importantly, the assembled pouch cell also can run with ultra-low specific capacity decay rate. Additionally, the pouch battery can also be applied to the operation of fans, temperature and humidity meters, mobile phone charging, etc.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Zining Man,Hao Tian,Xingbao Zhu,Zhe Lü
One experiment in this study utilized the plasticizer succinonitrile and lithium salt LiTFSI to directly create an ionic liquid electrolyte, with an artificial solid electrolyte interface layer generated using fluoroethylene carbonate. The typical electrolyte exhibited an ionic conductivity of 10–3 S cm–1 at room temperature and an electrochemical window of up to 5.3 V based on electrochemical impedance spectroscopy and linear sweep voltammetry tests. This electrolyte system effectively addresses the issues of decomposition and deterioration of traditional organic electrolytes in Li–O2 batteries at high voltages (over 4.5 V), as well as the problem of direct oxidation of the anode caused by oxygen shuttling, thereby greatly improving the lifespan of Li–O2 batteries. Additionally, the electrolyte’s low volatility and flame retardancy allowed for reliable operation of the battery in an air atmosphere. A Li–O2 battery assembled with the novel electrolyte was capable of cycling in a pure oxygen atmosphere for more than 1000 cycles at a capacity density of 200 mA h g–1 and over 150 cycles at 500 mA h g–1. Even when connected to ambient air without an additional oxygen selective membrane (OSM), the battery can still cycle continuously for more than 350 and 150 cycles at these two kinds of capacity density.
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Journal of Energy Chemistry
·
2024
·
IF 14
Fan Li,Tiantian Dong,Yi Ji,Lixin Liang,Kuizhi Chen,Huanrui Zhang,Guanglei Cui,Guangjin Hou
Solid polymer electrolytes (SPEs) have become increasingly important in advanced lithium-ion batteries (LIBs) due to their improved safety and mechanical properties compared to organic liquid electrolytes. Cross-linked polymers have the potential to further improve the mechanical property without trading off Li-ion conductivity. In this study, focusing on a recently developed cross-linked SPE, i.e., the one based on poly(vinylene carbonate)-poly(ethylene oxide) cross-linked network (PVCN), we used solid-state nuclear magnetic resonance (NMR) techniques to investigate the fundamental interaction between the chain segments and Li ions, as well as the lithium-ion motion. By utilizing homonuclear/heteronuclear correlation, CP (cross-polarization) kinetics, and spin–lattice relaxation experiments, etc., we revealed the structural characteristics and their relations to lithium-ion mobilities. It is found that the network formation prevents poly(ethylene oxide) chains from crystallization, which could create sufficient space for segmental tumbling and Li-ion conduction. As such, the mechanical property is greatly improved with even higher Li-ion mobilities compared to the poly(vinylene carbonate) or poly(ethylene oxide) based SPE analogues.
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JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Zhenbo Wang,Xiaoyan Guo,Guowei Zhang,Lu Sai,Hongzhe Wang,Ying Bai,Huiling Zhao
Li-rich oxides are one kind of promising cathodes for the advanced lithium-ion batteries owing to ultrahigh specific discharge capacity and low cost. Whereas, their high energy density stemmed from oxygen anion redox easily triggers irreversible phase transition and oxygen release, simultaneously companied with low initial Coulombic efficiency, rapid capacity degradation and poor cycling stability. Herein, an integrated strategy of Li 0.35 La 0.55 TiO 3 (LLTO) coating and Ti 4+ /La 3+ dual-element doping is introduced to improve the electrochemical performances of Li 1.2 Mn 0.56 Ni 0.17 Co 0.07 O 2 (LMNCO) via facile sol-gel method and annealing treatment. Various characterizations including in-situ XRD and DEMS demonstrate that LLTO coating can accelerate Li + diffusion and alleviate side reactions at cathode-electrolyte interface, meanwhile Ti 4+ /La 3+ -doping can stabilize lattice oxygen and restrain oxygen release in the charge-discharge process. Electrochemical test results manifest that the LLTO-modified LMNCO cathode exhibits excellent rate property and long-term cycling stability, e.g. , a discharge capacity of 153.6 mAh g −1 at 5C, and a superior capacity retention of 83 % after 400 cycles at 1C. This work presents one simple strategy for the modification of Li-rich material to rationally utilize TM cationic and oxygen anionic redox reactions, and to promote the electrochemical performance and structure stability of layered-structure cathode in long-term cycling even under elevated temperature.
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Journal of Energy Chemistry
·
2023
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IF 13.1
Han Yan,Ruifeng Song,Ruonan Xu,Shulin Li,Qiaoquan Lin,Xinlin Yan,Zhenyu Wang,Chuang Yu,Long Zhang
The (electro)chemical stability and Li dendrite suppression capability of sulfide solid electrolytes (SEs) need further improvement for developing all-solid-state Li batteries (ASSLBs). Here, we report advanced halogen-rich argyrodites via I and Cl co-occupation on the crystal lattice. Notably, a proper I content forms a single phase, whereas an excessive I causes precipitation of two argyrodite phases like a superlattice structure. The resultant synergistic effect of the optimized composition allows to gain high ionic conductivities at room temperature and −20 °C, and enhances the (electro)chemical stability against Li and Li dendrite suppression capability. The Li|argyrodite interface is very sensitive to the ratio of I and Cl. A LiCl- and LiI-rich double-layer interface is observed from the cell using the SE with optimized composition, whereas too high I content forms only a single interface layer with a mixture of LiI and LiCl. This double-layer interface is found to effectively mitigate the Li/SE reaction. The proper designed argyrodite enables ASSLBs to achieve good electrochemical properties at a broad temperature range regardless of the electrode materials. This co-occupation strategy provides a novel exploration for advanced halogen-rich argyrodite system.
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Nanomaterials
·
2024
·Vol. 14
·期 21
·1721
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IF 4.4
Qi You,Xuan Zhou,Chengxiang Yang,Mu Liu,Wei Liu,Jinkai Li,Xuchuan Jiang
A series of red-emitting phosphors, Na3.6Y1.8−x(PO4)3:xEu3+, have been synthesized by a high-temperature solid-phase method. The impact of the partial Li+/K+ion substitution on the crystal structure and photoluminescence (PL) performance of Na3.6Y1.05(PO4)3:0.75Eu3+phosphor have been investigated. Various techniques have been used for characterization of the as-obtained materials. X-ray diffraction (XRD) analysis was utilized to confirm the composites of these samples, and the morphology and element distribution were examined by scanning electron microscope (SEM) and transmission electron microscope (TEM). This study found that the developed Na3.6Y1.8−x(PO4)3:xEu3+phosphors exhibited a prominent emission peak at ~620 nm when excited at 393 nm, which corresponded to5D0→7F2transitions of Eu3+ions. Furthermore, the robust emission peak at ~705 nm (5D0→7F4) of these phosphors enables a better match with plant pigment absorption. Beyond that, the partial substitution of Li+/K+ions probably changed the crystal structure, and reduces the symmetry around Eu3+, leading to significantly enhanced luminous intensities by 23.24% and 18.29%, with the highest quantum yields (QYs) reaching 99.85% and 96.29%, respectively. Additionally, the prepared phosphors show non-thermal quenching and superior thermal stability at elevated temperatures from 298 to 473 K. These findings and results suggest that Li⁺/K⁺-substituted Na3.6Y1.05(PO₄)₃:0.75Eu3⁺ phosphors can serve as promising red-emitting phosphors for plant lighting applications.
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PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 40
·2404044
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IF 18.5
Zhenkun Liu,Xiangli Che,Wei Wang,Gesong Huang,Wenjie Huang,Chenyu Liu,Qi Liu,Ye Zhu,Zhan Lin,Dong Luo
Lithium-rich layered oxides (LLOs) have gained significant attention due to their high capacity of over 250 mAh g −1 , which originates from the charge compensation of oxygen anions activated under high voltage. However, the charge compensation of oxygen anions is prone to over-oxidation, leading to serious irreversible oxygen release, surface-interface reactions, and structural evolution. These detriments make LLOs undergo fast voltage decay and capacity fading, which have hindered their practical applications for many years. Herein, this work develops a multifunctional co-doping strategy and constructs W─O bonds with strong bonding interaction and covalence, low bond energy Li─S bonds with non-binding electrons near the Fermi level, and continuous and homogeneous surface spinel-like layer induced by W/S co-doping. Their synergistic effect significantly mitigates the irreversible oxygen release and surface-interface reactions and improves structural stability of Li-rich layered cathodes. Thus, the designed and prepared Co-free Li-rich layered cathode (Li 1.232 Mn 0.574 Ni 0.191 W 0.003 O 1.995 S 0.005 ) delivers superior voltage and capacity stability. Its capacity retention after 400 cycles is as large as 86%, and its voltage decay rate from the 10th to the 400th cycle is only 0.626 mV cycle −1 .
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Journal of Materials Research and Technology-JMR&T
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2024
·
IF 6.2
Xuewu Li,Chenghu Ma,Tian Shi,Hejie Yang,Chuanwei Zhang,Wei Qi,Chen Li,Rongrong Liu,Weiping He,Yuanhai Liu
Aluminum-Lithium (Al-Li) alloys widely used in aerospace manufacture are highly susceptible to corrosion, which limits their industrial applications. Herein, 1H,1H,2H,2H-perfluorodecyltriethoxysilane (PFDTES) is used as a modifier for low-surface-energy treatment of TiO 2 nanoparticles. The water-based polyurethane (PU) is made as a binder to achieve a tight bonding between modified ceramic particles and Al-Li alloy, thus resulting in the extremely-feasible air-spraying preparation of a superhydrophobic coating with strong abrasion resistance. The water contact angle (CA) of as-prepared coating achieves 160 ± 0.83°, and the rolling angle (SA) is as low as 5.95 ± 0.59°. The surface structure, organization and composition are further characterized using SEM, EDS, XPS and laser confocal microscopy. Meanwhile, the electrochemical impedance and potentiodynamic polarization tests are performed for corrosion characterization. The results show that the corrosion potential of such coating increases by 170 mV compared with substrate, the corrosion current density decreases by two orders of magnitude, and the impedance modulus increases by two orders. The corrosion inhibition rate of the as-prepared coating is 98.8%, indicating that the corrosion resistance has been significantly enhanced. In addition, the mechanical robustness and stability of the coating is evaluated and confirmed using a sandpaper rubbing test. It also possesses great self-cleaning, anti-pollution and thermostable behaviors, thereby allowing them to work in extreme manufactures. Moreover, the as-prepared coating exhibits excellent adaptability to various materials and anti-icing property. This work sheds positive insights in enlarging industrial applications of multifunctional ceramic coatings in aerospace fields.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
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IF 5.8
Wen Wang,Chuyuan Lin,Fenqiang Luo,Renpin Liu,Xiaochuan Chen,Wangyang Wu,Shiting Wei,Fuyu Xiao,Peixun Xiong,Qinghua Chen,Qingrong Qian,Lingxing Zeng
Hybrid magnesium-lithium batteries (MLIBs) are a promising battery system with safety and exceptional reaction kinetics due to the combination of the dendritic-free deposition Mg metal anode and the rapid Li intercalation cathode. The large interchain frame of VO 2 may contribute to the metal-ion diffusion, making it a suitable cathode for MLIBs. However, the development of VO 2 cathodes for MLIBs is restricted by bad structural stability and low electronic conductivity. Herein, MoS 2 with a hexagonal crystal structure is introduced into the tetragonal VO 2 to construct heterostructure interfaces and induce abundant oxygen vacancies (VO 2 /MoS 2 -2), which enhances the structural stability and reaction kinetics. For this reason, the VO 2 /MoS 2 -2 cathode delivers a remarkable capacity (518 mAh g -1 ) and a considerable cycling lifespan (202 mAh g -1 at 1.0 A g -1 over 700 cycles). Even at low temperatures (-15 and -40 °C), VO 2 /MoS 2 -2 delivers 145 and 115 mAh g -1 after 200 and 50 cycles at 0.1 A g -1 , respectively. This strategy of combinatorial design offers a widely applicable method for the cryogenic resistance and cycling durability of magnesium-lithium batteries.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2025
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IF 4.1
Bolin Chen,Shuru Wu,Zhenyuan Shi,Shuanghui Li,Zihan Chen,Tao Li,Qingsong Tong,Jun Gao,Minquan Tian,Jingzheng Weng
To enhance the stability and safety of solid-state lithium metal batteries under high voltage and high energy density conditions, a flexible inorganic–organic hybrid solid-state electrolyte based on polyacrylic acid–boric acid–anhydrous lithium hydroxide–lithium oxalate salt (LiPAAOB) and holey graphene oxide (HGO) was designed and fabricated. By optimizing the doping ratio of HGO, the LiPAAOB&HGO composite electrolyte exhibited optimal electrochemical performance. This composite electrolyte achieved an ionic conductivity as high as 1.5 × 10 −3 S cm −1 at room temperature, significantly exceeding that of the unmodified PVDF-based solid electrolyte (4.6 × 10 −4 S cm −1 ); its activation energy was 0.14 eV, demonstrating excellent lithium-ion mobility. An electrochemical stability window of 4.3 V with good redox reversibility was gained; the lithium-ion transference number (t Li + ) reached 0.77, markedly higher than that of conventional Poly (vinylidene fluoride) (PVDF)-based electrolytes. Linear sweep voltammetry (LSV) further confirmed that the electrochemical stability window of the electrolyte could be extended up to 5.2 V, meeting the requirements for high-voltage cathode materials. Regarding battery performance, the Li | LiPAAOB&HGO SPE | Li symmetric cell achieved stable cycling for over 2900 h under testing conditions of 0.2 mA cm −2 , verifying its excellent interfacial stability and dendrite suppression ability; the Li | LiPAAOB&HGO SPE | LiFePO₄ full cell retained 71.5 % capacity after 900 cycles at 1C rate, with an average coulombic efficiency as high as 99.8 %.
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