CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Mingxue Wang,Kun Wang,Xiaobing Huang,Tao Zhou,Huasheng Xie,Yurong Ren
To improve the intrinsic electronic conductivity of Na 3 V 2 (PO 4 ) 2 F 3 (NVPF), zirconium (Zr) was introduced into the NVPF/C compound through a carbothermal reduction reaction with citric acid as the carbon source. The effects of Zr 4+ doping on the crystal structure and morphology of the as-prepared materials were analyzed. Electrochemical and kinetic properties of the samples were investigated by galvanostatic charge-discharge, CV and EIS test. It is confirmed that moderate Zr 4+ doping can improve the electrochemical performance of NVPF. Among all Na 3 V 2-x Zr x (PO 4 ) 2 F 3 /C (x = 0, 0.01, 0.05, 0.1) samples, Na 3 V 1·95 Zr 0·05 (PO 4 ) 2 F 3 /C shows the best rate and cycle performance. It exhibits the highest specific capacity of 121.8 and 110.3 mAh/g at 0.2 and 10 C, respectively, and maintains a capacity retention of approximately 83.6% after 1000 cycles at 5 C. The kinetic properties results show that the excellent electrochemical performance of Na 3 V 1·95 Zr 0·05 (PO 4 ) 2 F 3 /C can be attributed to the increase in electronic conductivity and ion diffusion coefficient .
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Zhuoya Ren,Shuai Liu,Jianqiang Chen,Yang Yu,Qianqian Shang,Sandile Fakudze,Chengguo Liu,Peiguo Zhou,Qiulu Chu
As the world transitions towards an electric vehicle-driven future, demand for energy storage materials has continued to grow. Silicon-carbon composites are considered one of the most promising anode materials for lithium-ion batteries owing to their superior electrochemical performance. However, their commercialization is seriously limited due to the use of chemical reagents as carbon source, unstable coating structures and the complexity of the synthesis process. Herein, a facile one-step carbonization method at 800 °C was used to prepare Si@SiO X @C-800 composite by using rice husks, 1‑butyl‑3-methylimidazolium acetate (BMIMAcO) and silicon nanoparticles (Si-NPs). When the optimized Si@SiOx@C-800 was applied to the anode of lithium-ion batteries, it exhibited prominent reversible capacity (694 mAh g −1 at 0.1 A g −1 ), with remarkable rate performance (220 mAh g −1 at 2 A g −1 ), and excellent cyclic stability (460 mAh g −1 with a capacity retention of 105.7% at 1 A g −1 after 1000 cycles). The coupling of interfaces by Si-N bonds led to the formation of a double-layered structure which enhanced Li + diffusion coefficients and electrochemical kinetics, while tremendously limiting the volume variation of Si nanoparticles (Si NPs). The double-shell-structured Si@SiO X @C-800 composite material which was facilely synthesized using an eco-friendly approach presented superior electrochemical performance.
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高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2017
·Vol. 21
·期 12
·3611-3618
·
IF 2.316
Luo Rongjie,Lu Yang,Hou Xiaoyi,Yu Qiuhong,Peng Tao,Yan Hailong,Liu Xianming,Kim Jang-Kyo,Luo Yongsong
Composites consisting of selenium/carbon (Se/C) encapsulated by ultra-thin Ni(OH) 2 nanosheet shell are synthesized as cathode for high-performance lithium-selenium batteries. The Se/C-Ni(OH) 2 cathode presents excellent discharge capacities and cyclic stability with almost 100% Coulombic efficiencies. It delivers a reversible capacity of 323 mAh g −1 after 300 cycles with almost negligible capacity degradation after 100 cycles at a high current density of 1 C. Several unique functional features of the composite electrodes are responsible for the findings. The uniform mixture of Se and carbon black in the composite promotes the utilization of the active materials with enhanced ion/electron transfer. The Ni(OH) 2 nanosheets maintain the integrity of Se/C core during cycles, reducing the shuttling effect reactions of polyselenides. These results demonstrate that the Se/C-Ni(OH) 2 composite cathode is a promising candidate for application in rechargeable lithium-selenium batteries.
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高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 2
·1-12
·
IF 5.3
Wang Xiaoying,Yuan Wei,Kuang Yijing,Chen Xuyuan,Wang Xiaoning,Zhang Xiaoyu
A ratiometric electrochemical immunosensor is proposed for simultaneous detection of cellular-myelocytomatosis oncoprotein (C-myc) and B-cell lymphoma 2 (Bcl-2) via the potential-resolved strategy. It relied on multi-role co-loaded alloy composites (CLACs) and poly(3,4-ethylenedioxythiophene) (PEDOT)-graphene oxide (GO)-multiwalled carbon nanotubes (MWCNTs) (PGM) modified electrodes. CLACs with good catalytic and enzyme-like properties were synthesized in one step by loading tetramethylbenzidine (TMB) or methylene blue (MB) into Pt-Pd alloy and used as label materials. After immunological reactions, CLACs showed distinguishable dual differential pulse voltammetry signals at − 0.26 V and 0.38 V, corresponding to C-myc and Bcl-2, and the PGM had an electrochemical signal at 1.2 V, which could be used as a reference signal to construct a ratiometric sensor. CLACs had a satisfactory synergistic effect with the PGM, and eventually achieved quadruple signal amplification. Thus, benefiting from multiple magnification and ratiometric self-calibration functions, sensitive detections of C-myc and Bcl-2 were achieved, with detection limits as low as 0.5 and 2.5 pg mL −1 , respectively. Additionally, when the designed method was applied to blood samples from lymphoma patients, results consistent with the ELISA kit were obtained. This will open avenues for constructing multiple protein detection sensors. Graphical abstract
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高影响因子
JOURNAL OF POWER SOURCES
·
2014
·
IF 5.211
Xue Zhou,Yuanfu Deng,Lina Wan,Xusong Qin,Guohua Chen
A uniform carbon coated LiFe 0.15 Mn 0.85 PO 4 (LFMP/C) cathode material is synthesized by a surfactant-assisted, highly reproducible and energy-saving solid state method using a bimetallic oxalate (Fe 0.15 Mn 0.85 C 2 O 4 ) precursor. The obtained LiFe 0.15 Mn 0.85 PO 4 /C composite is characterized by X-ray diffraction (XRD), Raman spectrum , elemental analysis (EA), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The experimental results demonstrate that the oleic acid as a surfactant , for the scale preparation of LFMP, plays a critical role in controlling size of the obtained composite. The LiFe 0.15 Mn 0.85 PO 4 /C exhibits high specific capacity and good rate performance. It delivers initial discharge capacities of 156.5, 142.5, 129.0 and 103.0 mAh g −1 at 0.05, 0.1, 0.5 and 1C, respectively. Moreover, it shows good cycle stability at both room temperature (25 °C, 89% and 88% capacity retention after 250 and 500 cycles at 0.5 and 1C rates, respectively) and elevated temperature (55 °C, 80% capacity retention after 200 cycles at 0.5C rate). The significantly improved rate and cycling capability of the LiFe 0.15 Mn 0.85 PO 4 /C is attributed to the uniform carbon coating layer on the primary particles, the conductive network provided by the carbon between the LiMn 0.15 Fe 0.85 PO 4 /C particles and the sufficient pores formed in the LiFe 0.15 Mn 0.85 PO 4 /C aggregates.
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高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Zhilin Yan,Jiyang Liu,Yangfan Lin,Zheng Deng,Xueqin He,Jianguo Ren,Peng He,Chunlei Pang,Chengmao Xiao,Deren Yang,Haojie Yu,Ning Du
Silicon (Si) is considered as the most promising candidate for anode materials in the next-generation lithium-ion batteries (LIBs). Regulating the morphology and structure of Si plays a vital role in alleviating the volume expansion and improving electronic conductivity. Herein, an ingenious core-shell structure (denoted as CoMOF-D@Si@C) is synthesized by depositing Si uniformly on the pyrolytic metal-organic frameworks (MOFs) via chemical vapor deposition (CVD) method and then encapsulated with a carbon shell. The CoMOF-D@Si@C exhibits excellent rate capability and cycle performance, which delivers a high-rate capability of ~957 mAh g −1 at 10 A g −1 and a reversible capacity of 1493 mAh g −1 after 400 cycles. In particular, the capacity is maintained at 648 mAh g −1 after 1200 cycles at a high current density of 4 A g −1 with a rapid increase of the Coulombic efficiency (CE) to 99.8% after only 5 cycles and the average CE (99.7%) in the whole cycling at 4 A g −1 . Profiting from the outer carbon shell, uniform Si deposition and inner porous pyrolytic MOF structure, this architecture can maintain structural stability and provide constructive conductivity during cycling processes. The superior electrochemical performance of the CoMOF-D@Si@C composite makes it a promising anode material for LIBs.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Yang Xia,Liyue Yu,Chengwei Lu,Jing Zhu,Zhen Xiao,Jun Zhang,Chu Liang,Hui Huang,Yongping Gan,Wenkui Zhang
Monoclinic Li 3 V 2 (PO 4 ) 3 (LVP) fulfills safety requirements including superior chemical and thermal stabilities since the oxygen atoms are firmly anchored in PO 4 3− units, however the low intrinsic electronic conductivity strictly limits its electrochemical performance . Herein, to overcome this problem, a rationally designed passion fruit-like LVP@C/CNT composite constructed with LVP grains as seeds, carbon matrix as pulp, and carbon nanotubes (CNTs) as filaments, has been prepared via a facile spray pyrolysis method. In such unique biomimetic structure, carbon matrix encases LVP to reduce its particle size, which is beneficial to shorten ion pathways; Porous structure scattered around carbon matrix facilitates the rapid penetration of electrolyte; 3D CNT networks afford high-speed electron conduction and remarkable structural stability by forming the bridges between LVP grains. Owing to the multiple merits of this biomimetic structure, the rationally designed LVP@C/CNT composite with 3 wt% CNT exhibits high reversible capacity, superior cyclic stability and remarkable rate capability.
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高影响因子
Nano Energy
·
2020
·
IF 16.602
Baoyu Sun,Shuaifeng Lou,Wei Zheng,Zhengyi Qian,Can Cui,Pengjian Zuo,Chunyu Du,Jingying Xie,Jiajun Wang,Geping Yin
Constructing robust 2D−based energy storage nanomaterials by well−defined pore architectures and rational surface modification are critical yet daunting challenges for rechargeable alkali−ion batteries. Herein, a new−type 2D interwoven multi pores decorated Co 3 O 4 @N−doped carbon nanosheet with rich surface defects is proposed as lithium/sodium ion anodes for the first time. The combining experimental researches, microscopic structure characterization and dynamics analysis demonstrate that the multi porous structure provides large numbers of channels to accelerate Li + /Na + transport, rational surface design creates abundant active sites for fast ions reactions, while robust carbon shell offers excellent ionic/electrical conductivity and structural integrity. The obtained bifunctional composites deliver superior rate performance and long−term cycle stability (~529 mA h g −1 after 2000 cycles in LIBs and ~166 mA h g −1 after 1700 cycles in SIBs) due to the synergistic contribution of the unique structure and surface defects . Furthermore, it still remains a high reversible capacity (>610 mA h g −1 after 1000 cycles) in full cell. Kinetic analysis reveals the designed anode exhibits prominent pseudocapacitive behavior, enabling ultra−fast lithium/sodium storage and ultrahigh−rate capability. This work offers valuable insights for developing high performance energy storage devices.
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高影响因子
IONICS
·
2019
·Vol. 26
·期 4
·1721-1728
·
IF 2.289
Fan Xin-ming,Zhang Xia-hui,Hu Guo-rong,Zhang Bao,He Zhen-jiang,Li Yun-jiao,Zheng Jun-chao
SiO/C is believed to be one of the most promising anode material for lithium-ion batteries due to the low operation potential and superior theoretical capacity. However, the substantial volume change during cycling process limits its further practical application. Herein, we report an affordable and highly effective approach to enhancing the electrochemical performance by adding a small amount of single-walled carbon nanotubes (SWCNT) as conductive additive for SiO/C anodes. An efficient liquid-phase mixing approach is employed to evenly disperse the SWCNT into silicon oxide/graphite composite anode for lithium-ion batteries (LIBs). The electrochemical capability is carried out using pouch full cells with commercial electrode areal loading and mass loading. The addition of SWCNT (0.5%) reduces film resistance and direct current resistance (DCR) for charging. The lithium-ion diffusion coefficient is 6.32 × 10 −15 cm 2 s −1 for SWCNT-added sample, which is an order of magnitude higher than that of the sample without SWCNT (2.33 × 10 −16 cm 2 s −1 ). Furthermore, the battery assembled by the SWCNT-adding electrode shows better rate performance and cycle stability. The charge efficiency improves 1.25 times at 4 C charging, which enables fast charging for LIBs. The cycling results show that SWCNT-adding electrode displays capacity retention of 90.30% after 600 cycles at 1 C. Furthermore, the loading of SiO/C electrode increases from 93.4 to 95.4 wt%, which is beneficial for improvement of energy density. It is worth noting that it suggests a well-designed recipe for the practical application of SWCNT for LIBs.
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高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2026
·
IF 7.9
Xiaodong Yang,Tianyang Luo,Shunchang Yang,Yicheng Yang,Pengkai Sun,Lili Wang,Shuo Yang,Ye Han,Bin Gao,Dawei Su
Antibiotic residues are increasingly detected in aquatic environments, posing persistent ecological risks and threatening the sustainable reuse of wastewater resources. Developing low-cost, environmentally benign, and durable photocatalysts for efficient antibiotic removal remains a major challenge for practical water treatment. In this study, an interfacial-bonded kaolinite/g-C 3 N 4 composite was fabricated through an acid–alkali-assisted ball-milling strategy using earth-abundant raw materials. The structural, surface, optical, and photoelectrochemical properties of the composites were systematically characterized, while density functional theory (DFT) calculations were employed to elucidate the interfacial charge-transfer mechanism. The optimized composite (2mKCN10) exhibited a specific surface area of 66.23 m 2 g −1 , approximately 1.4 times that of pristine g-C 3 N 4, and achieved 88.12% levofloxacin removal within 120 min under simulated solar irradiation. The catalyst retained approximately 85% of its initial photocatalytic activity after ten consecutive cycles, demonstrating excellent long-term stability. Radical trapping experiments identified ·O 2 - as the dominant reactive species, while experimental characterization combined with DFT calculations supports the proposed interfacial electronic coupling between kaolinite and g-C 3 N 4 , which promotes charge separation and accelerates carrier migration. The simple and scalable ball-milling synthesis, combined with the use of naturally abundant clay minerals and the absence of noble metals, provides a practical route toward developing low-cost photocatalysts for antibiotic-contaminated wastewater treatment. This work offers an effective strategy for engineering clay–semiconductor interfaces and advances the development of sustainable photocatalytic technologies for wastewater remediation and future water reuse. Download: Download high-res image (256KB) Download: Download full-size image
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高影响因子
Journal of Chemistry
·
2021
·Vol. 2021
·期 1
·5685596
·
IF 2.506
Jia Ma,Jianer Wang,Yuping He,Yiwei Huang,Yejun Chen
Solvothermal reaction of 4,4’,4’-nitrilotribenzoic acid (H 3 TCA) with Ca(NO 3 ) 2 ·4H 2 O and Cd(NO 3 ) 2 ·4H 2 O successfully afforded a heterometallic compound, that is, [Cd 2 Ca(TCA) 2 (DMA) 2 (H 2 O) 3 ] n ·2n(DMA) ( 1 , DMA = N,N’-dimethylacetamide). The structure of 1 was further characterized through EA, diffraction of single crystal X-ray, and thermogravimetric analysis (TGA) together with powder X-ray diffraction (PXRD). Moreover, complex 1 ’s luminescent performance in solid state was also discussed at environmental temperature. The applications on the ischemic cerebral infarction therapy were evaluated, and the specific mechanism was investigated at the same time. Firstly, the hypersensitivity C-reactive protein (hs-CRP) content in human brain microvascular endothelial cell (HBMEC) was measured with real-time reverse transcription-polymerase chain reaction (RT-PCR). Then, interleukin-18 and interleukin-1 β content released through the HBMEC was detected with enzyme-linked immunosorbent assay (ELISA).
研究领域:
生物无机化学
·
神经药理学
·
炎症生物学
·
转化医学
·
分子影像学
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·Vol. 45
·期 15
·117640
·
IF 6.2
Li Xu,Wei Liao,Xiaosong Zhou,Yongqiang Tan
The influences of Cr 3 C 2 addition on phase formation, microstructures and mechanical properties of (Zr,Ti,Nb,Ta,Hf)C prepared from binary carbides mixtures by spark plasma sintering were studied. The introduction of 4/3 mol.% Cr 3 C 2 significantly lowered the minimum temperature for uniform high-entropy phase (Zr,Ti,Nb,Ta,Hf)C from 2200 °C for to 1900 °C. The lower solubility limit of Cr in (Zr,Ti,Nb,Ta,Hf,Cr)C results in excessive Cr 3 C 2 -based carbides, which tends to segregate along grain boundaries at higher sintering temperatures while locate at triple junctions at lower sintering temperatures . High mechanical strength of 599 MPa were obtained when 4/3 mol.% Cr 2 C 3 was added and sintered at 1900 °C. The fine grain size and Cr 3 C 2 -based carbides are responsible for the high mechanical properties. More Cr 2 C 3 addition results in lower mechanical properties due to excessive Cr 3 C 2 -based carbides.
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