JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Zhengwu Wang,Yannan Zhang,Bao Zhang,Dong Yang,Kai Zhou,Yixue Huang,Fei Wang,Jianguo Duan,Xianshu Wang,Peng Dong,Yingjie Zhang
Spinel LiNi 0.5 Mn 1.5 O 4 (LNMO) has gained significant attention as a promising cathode material for lithium-ion batteries due to its high working voltage (>4.7 V) and energy density . However, challenges such as electrolyte decomposition-induced material interface erosion and transition metal dissolution under high operating voltage hinder its commercial use. In this study, a thin and uniform Sm 2 O 3 layer has been successfully deposited on the surface of LNMO using a wet chemical method . A comprehensive investigation of surface morphology , crystal structure, and electrochemical performance of the modified LNMO is conducted. The results demonstrate that the Sm 2 O 3 surface modification acts as a robust multifunctional protective layer, effectively shielding against hydrofluoric acid-induced chemical attack and enhancing the migration efficiency of lithium ions . Notably, the capacity retention rate of LNMO@Sm 2 O 3 (3 wt%) remains up to 88 % after 280 cycles, significantly surpassing the uncoated counterpart. The coated material exhibits a capacity of 114 mAh g −1 even under 10 C rate conditions. Moreover, the AC impedance values and manganese dissolution of the modified material in the organic electrolyte are considerably lower than those of the uncoated counterpart. Theoretical calculations strongly support the experimental findings, revealing higher Mn vacancy formation energy and density of states at the Fermi energy level for the Sm 2 O 3 -modified electrodes. This research contributes to the field of surface modification and paves the way for further enhancements in the electrochemical performance of other high-voltage manganese-based lithium-ion batteries (LIBs).
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
纳米技术
·
表面工程
·
锂电池
✓ 已验证
DOI
高影响因子
CEMENT & CONCRETE COMPOSITES
·
2022
·
IF 9.93
Xing Ming,Qing Liu,Miaomiao Wang,Yongqing Cai,Binmeng Chen,Zongjin Li
Chloride-induced corrosion in reinforced concrete is a primary durability issue that causes large economic loss every year. To improve the intrinsic chloride binding capacity and realize a favorable corrosion protection of cement-based materials are thus crucial to prolong the service life of concrete structures. Here, alumina nano particles (ANPs) were incorporated to improve the chloride binding capacity of cement pastes in chloride solutions and the anti-corrosion performance of mortars under accelerated corrosion process. The ANPs facilitated the formation of alumino-ferrite-mono (AFm)-type phases, thereby improved the content of chemically bound chlorides. Solution calcium (Ca) ions benefited the chloride captured by calcium-(alumino-)silicate-hydrates (C-(A-)S-H) in the assistance of ANPs, especially at high initial chloride concentrations , and further evoked a pH-related chloride binding response. Moreover, the enhanced corrosion resistance was finally realized by incorporating appropriate amount of ANPs because of the filling and chemical effects induced low permeability of mortars. In general, the ANPs possess dual functions in the aspects of chloride binding and corrosion inhibition . These findings are expected to advance the design of high-durable cement-based materials serviced in the marine environment.
研究领域:
建筑材料
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土木工程材料
·
腐蚀科学
·
纳米材料应用
·
混凝土耐久性
✓ 已验证
DOI
高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2025
·Vol. 35
·期 7
·2341-2353
·
IF 4.7
Han-zhou LIU,Yan-chen LIU,Sheng-hao JING,Ya-qi HU,Zong-liang ZHANG,Si-liang LIU,Yang LIU,Zhi ZHUANG,Fan-qun LI,Fang-yang LIU
A dual-halide solid electrolyte, Li 3 YCl 3 Br 3 , was synthesized using a wet-chemistry route instead of the conventional mechanical ball-milling route. Li 3 YCl 3 B r3 exhibits an ion conductivity of 2.08 mS/cm and an electro- chemical stability window of 3.8 V. Additionally, an all-solid-state lithium-ion battery using Li 3 YCl 3 Br 3 and LiNi 0.83 Co 0.11 Mn 0.06 O 2 (NCM811) as the cathode material achieves a capacity retention of 93% after 200 cycles at 0.3 C and maintains a specific capacity of 115 mA·h/g during 2 C cycling. This exceptional performance is attributed to the high oxidative stability of Li 3 YCl 3 Br 3 and the in-situ formation of Y 2 O 3 inert protective layer on the NCM811 surface under high voltage. Consequently, the study demonstrates the feasibility of a simple, cost-effective wet-chemistry route for synthesizing multi-component halides, highlighting its potential for large-scale production of halide solid electrolytes for practical applications.
研究领域:
材料科学
·
电化学
·
固态离子学
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能源存储
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电池技术
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无机非金属材料
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纳米材料应用
✓ 已验证
DOI
高影响因子
Small
·
2024
·Vol. 20
·期 31
·2310912
·
IF 13
Xunzhi Miao,Jianhe Hong,Shuo Huang,Liye Ding,Fang Wang,Min Liu,Quanquan Zhang,Hongyun Jin
All-solid-state lithium batteries (ASSLBs) are highly promising as next-generation energy storage devices owing to their potential for great safety and high energy density. This work demonstrates that composite solid polymer electrolyte with vertically-aligned card-house structure can simultaneously improve the high rate and long-term cycling performance of ASSLBs. The vertical alignment of laponite nanosheets creates fast and uniform Li + ion transport channels at the nanosheets/polymer interphase, resulting in high ionic conductivity of 8.9 × 10 −4 S cm −1 and Li + transference number of 0.32 at 60 °C, as well as uniformly distributed solid electrolyte interphase. Such electrolyte is characterized by high mechanical strength, low flammability, excellent structural stability and stable ion transport channels. In addition, the ASSLB cell with the electrolyte and LiFePO 4 cathode delivers a high discharge specific capacity of 124.8 mAh g −1 , which accounts for 85.6% of its initial capacity after 500 cycles at 1C. The reasonable design through structural control strategy by interconnecting the vertically-aligned nanosheets open a way to fabricate high performance composite solid polymer electrolytes.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子科学
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Nan Lu,Xi Zhang,Ruiqi Na,Wendi Ma,Chongyang Zhang,Yuchao Luo,Yongfeng Mu,Shuling Zhang,Guibin Wang
The synthesis of a nanocomposite gel polymer electrolytes (NGPEs) using Li + -functionalized SPEEK (SPEEK(Li)) nanofiber membrane as a matrix, cross-linked PVA as a gelled agent and LiClO 4 as an electrolytic salt for electric double layer capacitors (EDLCs) were reported in this work. Compared with conventional PVA based gel electrolyte, the “SO 3 − Li + ” functional groups and the pores structure of the SPEEK(Li) nanofiber membrane improves the ionic conductivity as well as mechanical stability , which made the prepared NGPEs exhibited a high ionic conductivity of 8.9 × 10 −3 S cm −1 at ambient temperature and a large voltage stability window range from 0 to 2.0 V. The fabricated symmetric EDLCs showed a specific capacitance of 146.96 F g −1 at a current density of 0.5 A g −1 , with a maximum energy density of 18.26 W h kg −1 . Meanwhile, the EDLCs showed outstanding cyclical stability of 98% specific capacitance retention after 3000 cycles GCD testing, all of these results indicated that the NGPEs should be appropriate to EDLCs and next-generation energy storage systems .
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子化学
·
纳米技术
·
固体电解质
✓ 已验证
DOI
高影响因子
CHEMICAL COMMUNICATIONS
·
2015
·Vol. 51
·期 15
·3227-3230
·
IF 6.834
Maowen Xu,Jun-Ke Hou,Yu-Bin Niu,Guan-Nan Li,Yu-Tao Li,Chang Ming Li
Na2.65Ti3.35Fe0.65O9 rods were prepared by a simple solid-state route and coated with carbon to enhance their electronic conductivity. For the first time, Na2.65Ti3.35Fe0.65O9 was explored as an anode material for Na-ion batteries to deliver a discharge capacity of 137.5 mA h g−1 at a current rate of 40 mA g−1. The charge/discharge capacity of a carbon-coated sample increased by 46.3% to achieve 201.1 mA h g−1.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
WATER AIR AND SOIL POLLUTION
·
2023
·Vol. 234
·期 10
·630
·
IF 2.9
Liu Jianbo,Lv Gongcheng,Liu Xiaocong,Liu Junpeng,Jia Shouhao
The supernatant fluid and sludge produced by traditional polyacrylamide flocculant (PAM) flocculation of municipal sewage emit a strong odor, and the dewatering performance of flocculant flocculating sludge based on acrylamide as the main synthetic raw material remains undesirable. In this study, we investigated a new green bioflocculant called SDF. This bioflocculant was made using 3-chloro-2-hydroxypropyl-modified starch as the raw material, acrylamide as the monomer, cerium nitrate as the initiator, and dextrin and bone gum as fillers. The results of the study indicated that the SDF-flocculated sludge exhibited a larger pore structure, superior dewatering performance, and a lower intensity of malodorous substances in the supernatant compared to PAM. Furthermore, it was found that the component with the strongest odor in the supernatant detected through purge and trap-gas chromatography–mass spectrometry was ethanethiol, and it was observed that the signal intensity released from the SDF supernatant was 30.62% lower on the first day and 7.91% lower cumulatively over the course of 7 days when compared to PAM. As a consequence, the SDF materials offer promising potential for treating odorous gas and reducing sludge in sewage treatment plants due to their easy fabrication, low cost, and superior dewatering performance.
研究领域:
环境工程
·
高分子材料
·
水处理技术
·
生物化学工程
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Zhihao Wu,Ruchun Chen,Shuang Pan,Hui Liu,Xiaoli Hu
Herein, a convenient method is developed for ratiometric fluorescence detection of ATP (adenosine triphosphate) based on CDs-OPD (carbon dots- o-phenylenediamine). In the absence of ATP, oxOPD, the colored oxidation product of OPD fabricated by a redox reaction occurred between OPD and Cu 2+ , not only quenches the fluorescence of CDs, but also emits a yellow fluorescence which acts as another signal element. However, ATP will compete with OPD to chelate Cu 2+ inhibiting the redox reaction, which hampers the formation of oxOPD resulting in the diminution of IFE (inner filter effect) between CDs and oxOPD, then the fluorescence of CDs restores. ATP-induced dual-signal response of the CDs-OPD/Cu 2+ system makes ratiometric assay possible. The method exhibits high sensitivity toward ATP with a detection limit of 0.43 μmol L −1 . Furthermore, the semi-quantitative measurement of ATP is available by naked eyes through the color of fluorescence and solution. Finally, the developed method is employed for the quantification of ATP in practical samples with satisfactory results.
研究领域:
分析化学
·
生物传感
·
纳米材料
·
分子生物学
·
临床检验
✓ 已验证
DOI
高影响因子
IONICS
·
2019
·Vol. 26
·期 2
·627-637
·
IF 2.289
Zhai Huanhuan,Shuai Yi,Wang Yu,Chen Kanghua
As a negative electrode material, the main drawbacks of Li 4 Ti 5 O 12 (LTO) are its low electric conductivity and poor Li-ion diffusion coefficient. Fortunately, elements modification to address these problems is an effective method. Herein, we firstly report Ni and F co-modified LTO material which is synthesized via a solid-state reaction. Powder X-ray diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy were conducted to investigate the structure and morphology. Afterwards, we surprisingly find that Ni and F co-modification can reduce the overall charge transfer resistance of LTO for part of Ti 4+ converts into Ti 3+ and Ni 2+ ions supply the charge carriers. When test in battery, a superior discharge capacity of 236.1 mAh g −1 at 0.036 A g −1 is obtained, much higher than that of pristine LTO (196.9 mAh g −1 ). Furthermore, it still retains a discharge capacity of 174.6 mAh g −1 after 200 cycles at 0.18 A g −1 and exhibits an excellent rate performance.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
固体化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2015
·
IF 4.321
Lu Qi,Xianghai Meng,Rui Zhang,Haiyan Liu,Chunming Xu,Zhichang Liu,Peter A.A. Klusener
Droplet size distribution (DSD) and mean droplet size of chloroaluminate ionic liquid (IL)–heptane dispersion in a stirred vessel were investigated as a model system for the composite ionic liquid/hydrocarbon system applied in the commercial isobutane alkylation process. Focused beam reflectance measurement was used to identify the phase inversion, and particle video microscope (PVM) was employed to measure the DSD of IL-continuous dispersions. The effects of agitation speed and dispersed phase holdup on the DSD and mean droplet size were investigated. Phase inversion was found at a heptane hold-up of just above 0.5. The observed DSDs could be described well by logarithmic normal distributions in spite of variable operating conditions. The DSDs appeared to be more or less independent of the dispersed phase holdup ( ϕ heptane ⩾ 0.3) at the same agitation speed. A semi-empirical correlation based on Shinnar theory was proposed to predict the droplet mean size in the impeller region for the IL-continuous dispersion, and the predicted value agreed well with the experimental data. This work will be a good basis to predict the dispersion behavior under process conditions.
研究领域:
化学工程
·
流体力学
·
多相系统
·
过程工程
·
胶体与界面科学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 3
·1551-1561
·
IF 3.069
Long Meng,Yunan Wu,Kai Pan,Ye Zhu,Xiaojie Li,Wei Wei,Xiaoya Liu
Nickel-titanium alloy (NiTi alloy) has recently received an increasing amount of attention. However, the release of toxic nickel ions and the threat of implant infections has limited its clinical applications. Thus, we report a promising copolymer coating with excellent nickel ion (Ni2+) inhibition release, cytocompatibility, and antimicrobial properties to solve these safety issues involving NiTi alloy implantation. Quaternized copolymers poly (7-hydroxy-4-methylcoumarin methacrylate-co-2-hydroxyethyl methacrylate-co-2-(dimethylamino)ethyl methacrylate) (PCHD-Q) with many hydroxyl and tertiary amine groups were first synthesized, self-assembled into nanoparticles, and then deposited on NiTi substrate through electrodeposition. After UV irradiation, scanning electron microscopy (SEM) images revealed that homogeneous, continuous, and dense coatings were obtained. The coatings showed good improvement of protective behavior for the NiTi alloy in an in vitro environment and could significantly decrease the release of Ni2+ through physical barriers and physical adsorption, which could obviously reduce cytotoxicity inducing by Ni2+. According to in vitro cell viability and antibacterial tests, the quaternized coating materials not only provided a relatively stable biointerface for cell adhesion, spreading and growth, but also obtained excellent antimicrobial activity for the bare NiTi alloy against S. aureus and E. coli. These results suggested that our coatings materials have the potential for improving the safety and success rate of NiTi-based implantations.
研究领域:
材料科学
·
生物医学工程
·
表面涂层技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL COMMUNICATIONS
·
2016
·Vol. 52
·期 64
·9969-9971
·
IF 6.567
Yan Zhang,Yubin Niu,Min-Qiang Wang,Jingang Yang,Shiyu Lu,Jin Han,Shu-Juan Bao,Maowen Xu
In this communication, we designed and synthesized a novel calcium–organic framework and presented it as an anode material for sodium-ion batteries. The results show that it delivers a reversible capacity of higher than 140 mA h g−1 even after 300 cycles. The remarkable performance is attributed to the high structural stability and extremely low solubility of the calcium–organic framework in electrolytes.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
功能材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）