ELECTROCHIMICA ACTA
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2018
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IF 5.116
Bao-Hua Hou,Ying-Ying Wang,Hong-Yan Lü,Qiu-Li Ning,Xin Yan,Dao-Sheng Liu,Yue Chen,Jiawei Wang,Xinlong Wang,Xing-Long Wu
In order to ascertain the effect of carbon networks with various dimension on the Li-storage properties of Fe 3 O 4 anode material, three Fe 3 O 4 -based nanocomposites with different dimensional carbon networks, including zero-dimensional C/Fe 3 O 4 (0D-C/F), one-dimensional carbon nanotubes/Fe 3 O 4 (1D-CNTs/F) and two-dimensional graphene/Fe 3 O 4 (2D-G/F) nanocomposites, are successfully prepared via precisely controlling the preparation processes and parameters. Their morphology, conductivity, reaction kinetics, and electrochemical properties are discussed in detail. The results show that the addition of 1D-CNTs or 2D-G in the Fe 3 O 4 results in a smaller size of Fe 3 O 4 particles, which shortens the diffusion distance of Li + , and provides a faster electron conduction pathways, as well as the flexible carbon networks will effectively relieve the internal strain during charge and discharge processes. Most importantly, it is revealed that 2D-G/F with the large surface area leads to a faster electrochemical reaction kinetic which is mainly controlled by pseudocapacitive behavior, while the electrochemical reaction kinetic of 1D-CNTs/F is dominated by the slow Li + insert process. As a result, 2D-G/F shows the best Li-storage performance with a reversible capacity of 1014 mAh g −1 in the first cycle at 0.1 C and even at a high rate of 5 C, the reversible capacity is still 513.5 mAh g −1 . Furthermore, after 100 cycles at 0.5 C, it still delivers a reversible capacity of 1125.6 mAh g −1 without capacity decay.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2018
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IF 2.88
Dongfei Li,Naicui Zhai,Shichong Xu,Mingzhe Zhang,Chenglin Sun,Haibo Li
Raman spectra of the solution of LiClO 4 in acetonitrile (CH 3 CN) at different concentrations have been measured. With increasing the concentration of Li + , it was noted that several vibrational modes of CH 3 CN had significant changes in Raman shifts and some new Raman peaks emerged due to the CH 3 CN⋯Li + complex formation. In addition, Fermi resonance phenomenon between the ν 2 ' and ( ν 3 + ν 4 ) ' Raman bands of CH 3 CN⋯Li + complex was observed. Based on the Bertran's equations, Fermi resonance parameters of free CH 3 CN and CH 3 CN⋯Li + complex at different concentrations have been calculated, respectively. Compared the Fermi resonance coupling coefficients W of free CH 3 CN with CH 3 CN⋯Li + complex at different concentrations, the free CH 3 CN had a little smaller value, which indicated that the ν 2 ' /( ν 3 + ν 4 ) ' Fermi resonance in CH 3 CN⋯Li + complex was much stronger than the ν 2 / ν 3 + ν 4 Fermi resonance in CH 3 CN. From the detailed analysis of the effect of Li + on the spectral features of CH 3 CN, the effect mechanism of Li + coordination to CH 3 CN at the nitrogen of the CN group on the ν 2 / ν 3 + ν 4 Fermi resonance of CH 3 CN has been elucidated.
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高影响因子
ACS Nano
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2018
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IF 13.709
Jing Tian,Dunping Cao,Xuejun Zhou,Jiulin Hu,Minsong Huang,Chilin Li
A magnesium battery is a promising candidate for large-scale transportation and stationary energy storage due to the security, low cost, abundance, and high volumetric energy density of a Mg anode. But there are still some obstacles retarding the wide application of Mg batteries, including poor kinetics of Mg-ion transport in lattices and low theoretical capacity in inorganic frameworks. A Mg–Li dual-salt electrolyte enables kinetic activation by dominant intercalation of Li-ions instead of Mg-ions in cathode lattices without the compromise of a stable Mg anode process. Here we propose a Mg–organic battery based on a renewable rhodizonate salt (e.g., Na2C6O6) activated by a Mg–Li dual-salt electrolyte. The nanostructured organic system can achieve a high reversible capacity of 350–400 mAh/g due to the existence of high-density carbonyl groups (C═O) as redox sites. Nanocrystalline Na2C6O6 wired by reduced graphene oxide enables a high-rate performance of 200 and 175 mAh/g at 2.5 (5 C) and 5 A/g (10 C), respectively, which also benefits from a high intrinsic diffusion coefficient (10–12–10–11 cm2/s) and pesudocapacitance contribution (>60%) of Na2C6O6 for Li–Mg co-intercalation. The suppressed exfoliation of C6O6 layers by a firmer non-Li pinning via Na–O–C or Mg–O–C and a dendrite-resistive Mg anode lead to a long-term cycling for at least 600 cycles. Such an extraordinary capacity/rate performance endows the Mg–Na2C6O6 system with high energy and power densities up to 525 Wh/kg and 4490 W/kg (based on active cathode material), respectively, exceeding the level of high-voltage insertion cathodes with typical inorganic structures.
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高影响因子
CERAMICS INTERNATIONAL
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2018
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IF 3.057
Fanyu Kong,Xiaodong He,Qianqian Liu,Xinxin Qi,Yongting Zheng,Rongguo Wang,Yuelei Bai
The presented work compared the etching behavior between combustion synthesized Ti 3 AlC 2 (SHS-Ti 3 AlC 2 ) and pressureless synthesized Ti 3 AlC 2 (PLS-Ti 3 AlC 2 ). Because the former had a more compact structure, it was harder to be etched than PLS-Ti 3 AlC 2 under the same conditions. When served as anode material for Li-ion batteries, SHS-Ti 3 C 2 showed much lower capacity than PLS-Ti 3 C 2 at 1 C (52.7 and 87.4 mAh g −1 , respectively) due to the smaller d -spacing. Furthermore, Potentiostatic Intermittent Titration Technique (PITT) was used to determine the Li-ion chemical diffusion coefficient ( D Li + ) of Ti 3 C 2 in the range of 10 −10 − 10 −9 cm 2 s −1 , indicating that Ti 3 C 2 could exhibit an excellent diffusion mobility for Li-ion.
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JOURNAL OF POWER SOURCES
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2018
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IF 6.945
Jingyi Wu,Hongxia Zeng,Qingxuan Shi,Xiongwei Li,Qing Xia,Zhigang Xue,Yunsheng Ye,Xiaolin Xie
Uncontrollable lithium (Li) dendrite growth has hampered the application of lithium metal batteries (LMBs). Herein, a novel plastic crystal composite polymer electrolyte (nh-CPE) consisting of multifunctional two-dimensional (2D) molybdenum disulfide (MoS 2 ) and ion-conducting one-dimensional (1D) surfactant oxidized cellulose nanocrystal (OCNC) is developed to overcome this challenge. The nh-CPE possesses good Li-dendrite-suppressing ability, which is attributed to the well-designed three-dimensional (3D) ion conducting network constructed by homogeneously dispersed MoS 2 and OCNC. This structure facilitates Li-ion conductivity and enables uniform Li deposition on the anode. Moreover, the impermeable MoS 2 nano-flakes with excellent mechanical strength serve as physical barriers to hold the electrolyte-electrode interface stability and consequently block Li dendrite growth and enhance fire retardancy. When applied in LMB, the nh-CPE exhibits excellent cycle performance and rate capability, with 90% capacity retention after 200 cycles at 0.5 C and 60 °C, and a discharge capacity of 128 mAh g −1 at 1 C. Notably, owing to high room-temperature ionic conductivity (0.8 mS cm −1 ), the cell with nh-CPE cycled at room temperature delivers an initial discharge capacity of 144 mAh g −1 . The outstanding performance and simple process offer great opportunity to promote Li-dendrite-suppressing LMBs for practical application.
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ELECTROCHIMICA ACTA
·
2018
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IF 5.116
Zhengyi Qian,Baoyu Sun,Lei Du,Shuaifeng Lou,Chunyu Du,Pengjian Zuo,Yulin Ma,Xinqun Cheng,YunZhi Gao,Geping Yin
Since electrode surfaces primarily house the sites of oxygen reduction/evolution reactions, surface chemistry is pivotal for both charge and discharge processes of Li–O 2 batteries . Herein, we introduce oxygen-containing functional groups associated with defects on the carbon fiber papers (functionalization) via acid treatment and investigate their effects on the rechargeable nonaqueous Li–O 2 batteries. The discharge platform increases from 2.68 V to 2.79 V, meanwhile the decreased charge overpotential (a drop of 0.84 V) is also observed after functionalization. It is found that the discharge products formed on pristine carbon fiber exhibit a huge toroidal-like structure, in contrast to the porous flake clusters with much smaller size on the functionalized carbon fiber. On the other hand, the smaller product clusters are found to be much easier to be oxidized, leading to remarkably reduced charge overpotential. In this regard, the decomposition of electrolyte and corrosion of carbon cathode are dramatically alleviated, thus leading to greatly promoted cycling performance. All the experimental facts suggest that the oxygen functional groups associated with defects could provide tremendous active sites for the nucleation of discharge products and result in remarkably decreased overpotential for both the oxygen reduction and the oxygen evolution reaction in our cases.
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JOURNAL OF MEMBRANE SCIENCE
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2017
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IF 6.035
Guoping Chen,Xiong Song,Suqing Wang,Ying Wang,Tuo Gao,Liang-Xin Ding,Haihui Wang
Lithium–sulfur (Li–S) battery is considered as one of the most promising advanced energy storage devices. However, several critical issues remain which restrict their practical applications, especially the shuttle effect of soluble lithium polysulfides . Herein, we designed a lightweight multifunctional layer comprising reduced graphene oxide (rGO) and cobalt/nitrogen co-doped carbon nanofibers (Co-N-C) to modified the polypropylene (PP) separator to facilitate the electrochemical performance of Li–S batteries. The Co-N-C/rGO layer with abundant mesopores possesses strong immobilization ability of polysulfides and high electronic conductivity, which could work as an intrinsic physical/chemical frame work barrier and an upper current collector to trap and reutilize the polysulfides. Consequently, the Li–S battery with the modified Co-N-C/rGO/PP separator exhibits excellent cycling performance and good rate capability. A high discharge capacity of 1344 mAh g –1 at 0.1 C, 658 mAh g –1 at 5 C and a low capacity degradation rate of 28.8% after 500 cycles at 0.5 C were obtained. These exciting results indicate that this multifunctional Co-N-C/rGO/PP separator could be a promising separator candidate for Li–S batteries.
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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.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Zhengren Tao,Fangrui Cheng,Yinghan Wang,Sijie Su,Enhai Song,Jiulin Gan,Shi Ye
The arrangement of lithium and niobium in the LiNbO 3 lattice is crucial to its notable ferroelectric, piezoelectric, ion conductive, and nonlinear optical properties. However, the synthesis of Li concentration-gradient nanocrystals remains a significant challenge. In this paper, we report a reliable method for synthesizing LiNbO 3 : Yb/Er nanocrystals with a Li-gradient through topochemical molten salt synthesis. We elucidate the Li-gradient characteristics using various analytical techniques, including depth-dependent elemental analysis. Variable-temperature upconversion luminescence spectroscopy provided insights into thermally induced surface and interior Li + diffusion. Our findings demonstrate that Li-gradient nanocrystals exhibit enhanced ferroelectric behavior and increased sensitivity to mechanical force in upconversion emission response. This study proposes a feasible universal strategy for synthesizing alkali metal niobate materials with controlled polarization, offering promising candidates for flexible, low-power optoelectronic devices.
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Laser & Photonics Reviews
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2024
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IF 9.8
Jiaying Zheng,Jiawei Liu,Yanrong Liang,Xiangjia Sun,Jiao Liu,Tongtong Zhu,Chunyan Lv,Xiaojuan Liang,Weidong Xiang
In laser illumination, there is considerable interest in phosphor-converted laser diodes that boast high efficiency and exceptional thermal stability. Phosphor-in-glass (PiG) and phosphor-in-glass film (PiF) are highly favored for their efficiency, cost-effectiveness, and ease of fabrication. To tackle the issue of low thermal conductivity of glass, a novel lithium–aluminum–silicate glass is innovatively developed. This glass induces the precipitation of spodumene crystalline phase, enhancing material stability. Utilizing solid-state sintering techniques, Y 3 Al 3.5 Ga 1.5 O 12 :Ce 3+ (YAGG:Ce) PiG is fabricated, which exhibited a luminous flux (LF) of 866.76 lm under 450 nm blue light with 3.88 W input power. Benefiting from the high thermal conductivity of sapphire substrate and the high-intensity glass system, YAGG:Ce PiF demonstrated a saturation threshold of 10.20 W, yielding an impressive LF of 2178.1 lm, which is 2.5 times that of PiG samples. Notably, the thermal conductivity increased significantly from 2.2 W m −1 K −1 (PiG) to 7.0 W m −1 K −1 (PiF), surpassing traditional organic resin materials. To validate the practicality of the two-color converters, it integrates them into both starlight lamp and laser flashlight modules for encapsulation, thereby generating attractive green light in various environments. This design holds the potential to become the ideal choice for the next generation of high-power, high-brightness laser illumination.
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Surfaces and Interfaces
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2024
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IF 5.7
Xinru Wang,Qiuxu Chen,Daming Yang,Ying Li,Dongxu Yin,Baoxin Ni,Wei Lu,Guiru Sun,Ming Feng
Photo-assisted electrochemical strategy has garnered interest for its ability to diminish the large overpotential of lithium-oxygen batteries (LOBs). Nonetheless, creating a sophisticated photocatalyst capable of absorbing a wide spectrum of light and dramatically lowering the recombination rate for electron-hole pairs presents a significant challenge. Herein, we design an Ag-doped ZnO (Ag@ZnO) hollow nanosphere as photocatalysts to boost the reaction dynamics of photo-assisted LOBs. The Ag@ZnO hollow nanospheres, featuring a mesoporous structure, are beneficial for improving O 2 transport and enabling the retention of discharge products. Additionally, the ability to absorb light and the efficiencies of electron-hole separation are enhanced for Ag@ZnO as a result of Ag doping. The electrons generated by photoexcitation facilitate the conversion of O 2 to produce Li 2 O 2 during discharge, whereas during charging, the presence of holes causes the decomposition of Li 2 O 2 . Consequently, a significantly low overpotential of 0.22 V, ultrahigh cycling efficiency of 93.73%, and good reversibility was achieved for the photo-assisted LOBs using Ag@ZnO. We consider that this work can offer a reliable strategy to improve electrochemical kinetics and contribute to the development of efficient photocatalysts for photo-assisted LOBs.
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CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Haihua Wang,Futao Li,Chao Zhu,Chaoxian Chen,Ze Ding,Xiangping Chen
The rapid growth of the new energy market has led to a substantial increase in the demand for ternary lithium batteries, highlighting the importance of recycling their cathode materials to mitigate environmental risks and alleviate the limited supply of valuable metals. Traditional recycling methods for waste ternary lithium batteries are often inefficient and energy-intensive, particularly in recovering lithium. This study proposes a novel process for the separation and recovery of Li, Ni, Co, and Mn from simulated spent ternary lithium battery cathode materials. The process employs chromatographic separation and column operation techniques using amine-modified polyacrylonitrile fibers as adsorbents, which have selective adsorption capacity for Li with transition metals Ni, Co, and Mn. Experimental results demonstrated a lithium recovery rate of 99.4 % with 100 % purity under optimized conditions: solution pH of 2, feed solution concentration of 10 mmol/L, a fully packed adsorption column, and a feed flow rate of 0.29 mL/min. During the elution process, 0.2 mol/L nitric acid achieved effective desorption of the adsorbed metals. Furthermore, the intermetallic separation coefficients revealed significant separation efficiencies for Ni, Co, and Mn. This proposed method offers notable advantages in recovery efficiency, selectivity, and environmental sustainability, with particularly outstanding performance in lithium recovery, making it a promising strategy for recycling valuable metals from spent ternary lithium batteries.
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