ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Zongzhe Liu,Shaobo Ma,Xue Mu,Renlong Li,Geping Yin,Pengjian Zuo
A silicon anode with ultra-high specific capacity has motivated tremendous exploration for high-energy-density lithium ion batteries while it still faces serious issues of irreversible lithium loss, unstable electrode electrolyte interface (SEI), and huge volume expansion. Prelithiation is a crucial technology to alleviate the harm of active lithium loss of silicon-based full-cell systems. Herein, we reported a cathode prelithiation method using Li2S-PAN as a lithium “donor”, which was synthesized via chemical reaction between sulfurized polyacrylonitrile and Li-biphenyl complex. The Li2S-PAN with an initial charging capacity of 668 mAh g–1 (2.5–4.0 V) is loaded on the LiFePO4 electrode, and the LiFePO4/Li2S-PAN composite electrode displays a high initial charge capacity of 206 mAh g–1, which is 22.3% higher than the pristine LiFePO4. With a silicon/graphite/carbon (Si/G/C) composite anode, the Si/G/C||LiFePO4/Li2S-PAN full cell exhibits a reversible capacity of 123 and 107 mAh g–1 in the 1st and 10th cycle, which is 15.5 and 24.5% higher than the Si/G/C||LiFePO4 battery, respectively. The SEI layer of the silicon anode in the Si/G/C||LiFePO4/Li2S-PAN cell contains abundant conductive LiF species, which can enhance the interfacial stability and reaction kinetics of the cells. The proposed cathode prelithiation process is compatible with the industrial roll-to-roll electrode preparation process, exhibiting a promising application prospect.
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高影响因子
Energy Technology
·
2021
·Vol. 9
·期 4
·2100022
·
IF 3.631
Xianxing Mao,Xinyi Zhang,Yanfei Zeng,Ahmed Farid Halima,Pei Kang Shen
Aqueous zinc-ion batteries (AZIBs) are becoming increasingly popular energy storage technology compared with conventional lithium-ion and other rechargeable batteries. However, the poor structural stability and low conductivity remain a significant challenge in the development of the cathode material. This renders AZIBs with limitation of commercial secondary batteries. Herein, cathode optimization is demonstrated through precise control of the coupling of MnO with reduced graphene oxide (rGO) and multiwall carbon nanotubes (MWCNTs). 3D ternary MnO/rGO/MWCNTs (MPGC) nanostructures are synthesized by combining MnO nanoparticles with rGO and MWCNTs using a scalable hydrothermal and solid thermal reduction method. The MPGC cathode delivers a high specific capacity of 267.4 mAh g −1 at 0.2 A g −1 and improved stability with retention rate of 96.2% after 200 cycles at 0.5 A g −1 and 94.7% after 550 cycles at 1.2 A g −1 . This simple synthesis method has great potential in practical application of AZIBs as next-generation rechargeable batteries.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Ran Wang,Chong Cai,Di Wang,Zhiwei Liu,Lili Gao,Tifeng Jiao
In this work, a new type of self-assembled phytic acid-graphene oxide composite foam (PAGF) was prepared by hydrothermal method. In addition, Au nanoparticles (Au NPs) and Fe 3 O 4 particles were loaded onto PADF to obtain PAGF@Au&Fe 3 O 4 composite by a simple one-step method. The addition of graphene oxide (GO) can effectively prevent the agglomeration of Au NPs and weaken its surface passivation. The results of SEM, XRD, XPS and BET proved the successful preparation of the composite and its large specific surface area. Moreover, the synthesized PAGF@Au&Fe 3 O 4 composite showed good catalytic performance for p-nitrophenol (4-NP) and o-nitroaniline (2-NA) solutions with the rate constant (k) values of 0.0799 min −1 and 0.0546 min −1 , respectively. Due to the addition of Fe 3 O 4 , the composite exhibited good stability and recyclability, and maintained high catalytic efficiency after 8 cycles of catalytic process. The current work provides new ideas for developing novel graphene oxide-based composite materials and their catalytic degradation of organic pollutants.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Rui Ling,Bingqiang Cao,Wentao Qi,Chao Yang,Kaier Shen,Zhiyuan Sang,Jinze Guo,Dongli Xie,Shu Cai,Xiaohong Sun
Na 3 V 2 (PO 4 ) 3 (NVP) with a unique 3D open NASICON framework is regarded as an attractive electrode material in sodium-ion batteries (SIBs) due to its wide range of Na + accommodations. Nevertheless, the practical implementation of NVP is hampered by the unsatisfying capabilities and cycling stability at high rates of charging/discharging, which attribute to low electron/ion conductivities. Herein, a novel NVP@carbon/N-doped graphene aerogel (NVP@C/N-GA) is designed via a facile precursor infiltration followed by the post-heating treatment process. In this delicate design, the 3D porous and interconnected framework endows with bicontinuous ion/electron transport pathways for the rapid electrochemical reaction ; while the carbon layer combined with N doped graphene aerogel (N-GA) provides long-range conductive networks throughout the whole electrode and ensure the cycling stability. Consequently, the NVP@C/N-GA electrode is shown to achieve unprecedented rate capabilities and outstanding ultralong cycling stability as cathode (74.1 mA h g −1 at 100 C; 84% capacity retention at 20 C after 12,000 cycles) and anode (109.3 mA h g −1 at 20 C; 87% capacity retention at 20 C after 5000 cycles), both of them outperforms the majority of previously reported literature. Moreover, the symmetric full cell assembled by NVP@C/N-GA also demonstrates admirable electrochemical properties . Thus, this work may provide new avenues for constructing electrodes with high rate capability and ultralong-life.
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高影响因子
JOURNAL OF POWER SOURCES
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2021
·
IF 9.127
Yi-Feng Wang,Li-Na Song,Fei Li,Yue Wang,Xiao-Xue Wang,Ma-Lin Li,Lian-Chun Zou,Ji-Jing Xu
High concentration LiBr is beneficial to enhance the Br − oxidation rate, displaying stable low voltage plateau during charging process for lithium–oxygen batteries . However, the sufficient cyclic performance is generally restricted by uncontrollable high level Br 3 − , resulting in the low energy efficiency and shuttle effect . Herein, a nanoreactor , red-ox mediators shuttling suppressor and lithium-metal protector with the combination of the high concentration and shuttle-free LiBr are successfully constructed by anchoring the Br 3 − to carbonized ZIF-8 supported on reduced graphene oxide substrate (ZC-rGO). ZnO-decorated/nitrogen-doped 3D carbon framework of ZC-rGO cathode can accurately capture Br 3 − by space confinement effects and/or chemisorption , which is beneficial to improve the oxidation of discharge products (Li 2 O 2 ) and avoid the anode corrosion. The Li–O 2 battery demonstrates enormous advantages of the RMs in comparation with the typical rGO-based batteries, such as better cycling performance (>90 cycles) and more stable overpotential (<1.0 V). The proposed strategy in this study opens up a new way of inhibiting the shuttle effect of RMs in Li–O 2 batteries and other halogen batteries.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2021
·Vol. 32
·期 6
·7574-7586
·
IF 2.478
Ni Xinyao,Feng Hao,Li Lihui,Liu Xiaoyun,Wang Tianyi,Cui Zhong-Kai,Gu Jinlou,Zhuang Qixin
Nanocomposites with great thermal stability and excellent dielectric properties play a vital role in the development of high-temperature resistant capacitors. A facile yet effective method to synthesize enhanced dielectric properties of thermostable three-phase poly(p-phenylene benzobisoxazole) (mCCTO@CFGO/PBO) nanocomposite films is demonstrated in this work. The amino-functionalized oxide CaCu 3 Ti 4 O 12 nanoparticles (mCCTO) are enwrapped by the carboxyl-functionalized ultrathin graphene shells (CFGO), forming the silk-cocoon structure to achieve homogeneous dispersion in the matrix. The final films are fabricated via in situ polymerization by introducing the mCCTO@CFGO nanoparticles into the PBO precursor polymer. The mCCTO@CFGO/PBO nanocomposite films exhibit high thermal stability (the 5% thermal decomposition temperature is 655 °C), while the unique silk-cocoon structure effectively confers the high dielectric constant up to 86.9 and ultra-low dielectric loss (0.063) with the loading of 10 wt% mCCTO@3 wt% CFGO/PBO at 1 kHz and 200 °C. This promising strategy accelerates the development of electronic devices used under high temperatures.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Wei Qi,Mengjie Li,Wei Chen,Jun Yang,Long Zhao
Radiation techniques, with their advantages of being clean, economical, and efficient, have been widely studied for the synthesis of nanocomposites. In this study, reduced graphene loading palladium nanoparticles (Pd/RGO) were prepared in situ in a single step at the phase interface of an ionic liquid (IL)-based microemulsion of these nanoparticles exposed to a high-energy electron beam. The influence of the radiation dose and initial mass ratio of graphene oxide (GO) and PdCl 2 were studied. In addition, the effect of the length of the alkyl chain of the IL on the shape and Pd nanoparticle content of Pd/RGO composites, as well as their electrochemical activity, were investigated in detail. The radiation dose did not affect the shape of the Pd nanoparticles but increased the Pd nanoparticle content of the Pd/RGO composites when the dose exceeded 80 kGy. The Pd nanoparticle content of the Pd/RGO composites decreased as the alkyl chain length of the ILs and the initial mass ratio of GO and PdCl 2 increased. Both the Pd nanoparticle content and their distribution in the Pd/RGO composites have a great influence on their electrochemical performance. Finally, Pd/RGO composites with excellent electrochemical activity were produced efficiently by using the radiation technique. This study provides a basis for the synthesis of carbon-based noble metal nanocomposites using a simple clean and efficient method.
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ACS Applied Nano Materials
·
2021
·
IF 5.097
Xiaoru Gao,Jinfeng Wang,Qihui Xue,Yuan-Yuan Ma,Yuanzhe Gao
The exploration of high efficient and stable visible light-driven photocatalysts for water splitting into green energy hydrogen has been considered as one of the currently most challenging topics for solving the energy crisis and environmental remediation. In this paper, a series of ternary AgBr/polyoxometalate/graphene oxide (AgBr/POM/GO) composites (POMs = {PMo12}, {PW12}, {SiW12}, {P2W18}, and {P2Mo18}) were synthesized via an ionic liquid-assisted hydrothermal method. The successful combination of ternary AgBr/POM/GO composites has been determined by a series of techniques. In addition, such ternary nanocomposites displayed wide visible light absorption ranges. Photocatalytic experiments demonstrate that such AgBr/POM/GO ternary composites display remarkable photocatalytic activity for hydrogen production, and the photocatalytic performance can be regulated by the species of POMs. Under minimally optimized conditions, the average hydrogen evolution rates were 256.0 μmol g–1 h–1 for AgBr/PMo12/GO, 223.2 μmol g–1 h–1 for AgBr/PW12/GO, 212.0 μmol g–1 h–1 for AgBr/SiW12/GO, 207.2 μmol g–1 h–1 for AgBr/P2W18/GO, and 177.2 μmol g–1 h–1 for AgBr/P2Mo18/GO, respectively. Both AgBr and POMs can be excited under the irradiation, greatly improving the visible light adsorption of the nanocomposites. Moreover, the adoption of POMs enhances the photochemical performance of the ternary nanocomposites because of their excellent redox properties and good photogenerated-electron/holes generation capacities. This work presents an efficient POM-based photocatalyst system for photocatalytic hydrogen production, which may provide important guidance for the design and exploration of efficient photocatalytic materials.
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高影响因子
Journal of the Mechanical Behavior of Biomedical Materials
·
2021
·
IF 3.902
Feng Hu,Hailin Lu,Zishuo Ye,Shoujing Zhang,Wenbo Wang,Li Gao
New fabrication methods and lubrication materials must be developed to improve the lubrication performance of artificial joints and increase the lubrication duration. Herein, a novel polyvinyl alcohol/polyethylene glycol/graphene oxide (PVA/PEG/GO) hydrogel was prepared by a physical cross-linking method, and then the hydrogel and its sustained-release solution were used as lubricant for friction evaluation. The results demonstrated that the slow-release gel solution has good lubrication performance, and coefficient of friction (COF) is only 0.04, which is much lower than the COF of distilled water (about 0.08) under the same conditions. The structure characterization results revealed that no new materials are formed in the gel. The results of thermogravimetric analyses and differential scanning calorimetry demonstrated that the addition of GO may improve the network crosslinking structure of the PVA/PEG hydrogel and improve its mechanical strength . In addition, PVA/PEG/GO hydrogel has superior self-healing function. The self-healing hydrogel did not break again after being pulled under 200 G of weights. The PVA/PEG/GO hydrogel with excellent slow-release lubricating performance and self-healing properties provides a novel candidate for design of long-term lubricating artificial joints, and is expected to promote the progress of artificial joint lubrication applications.
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高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Yangjinghua Yu,Runjun Sun,Zhong Wang,Mu Yao,Guohe Wang
Graphene oxide (GO) composite materials as adsorbent have been widely researched in the adsorption various heavy metal contaminated water . In order to improve its structural stability and adsorption properties, self-support GO/Sodium Alginate (SA)/1, 2-Propanediamine (PDA) composite membrane was prepared by vacuum filtration. The performance of amino functional groups in composite membranes was observed using X-ray photoelectron spectrum (XPS). The X-ray diffraction (XRD) was used to characterize the interlayer spacing. The Pb 2+ adsorption properties of composite membranes were discussed by intermittent adsorption experiments. Intermittent adsorption experiments include the subject of the pH, contact time, adsorption film weight, concentration of metal ion and temperature change. The Pb 2+ adsorption on the composite membrane strongly depends on pH. After 20 min of adsorption, the membrane reached the adsorption equilibrium, and the adsorption rate was fast. The maximum adsorption capacity of the composite membrane to Pb 2+ was 189.25 mg g −1 . The adsorption process of the membrane was consistent with the chemisorption process and mono-layer adsorption process. The GO/SA/PDA membranes can be used to the adsorption of Pb 2+ , which might give contribution to environmental protection.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yubo Pan,Yali Zhang,Yaoguo Huang,Yun Jia,Linlin Chen
Cyanide wastewater contains highly toxic contaminants such as free cyanide and metal-cyanide complex, it is necessary to find the appropriate degradation technologies. In this study, a simple and effective photocatalyst with enhanced adsorption and photocatalytic activity was developed. A new composite photocatalyst was successfully prepared by solid-state dispersion (SSD) method, which combined graphene oxide (GO), nano titanium dioxide (nano-TiO 2 ) and silicon-based zeolite (ZSM-5). The techniques of scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), N 2 adsorption–desorption test, X-ray diffraction (XRD), ultraviolet–visible diffuse reflectance spectroscopy (UV–Vis DRS), thermogravimetric analysis (TGA), and X-ray photoelectron spectroscopy (XPS) were used to characterize the samples. The experiments with different content of nano-TiO 2 , different wavelengths of light source, different catalyst dosage, control experiments of different materials, and the determination of pH value and zeta potential were also carried out. The results showed that the 3.0 g/L of GTZ-60 (GO/TiO 2 /ZSM-5 composite photocatalyst with a content of 60 wt% TiO 2 ) has the highest photocatalytic degradation efficiency under ultraviolet wavelength which the degradation efficiency of total cyanide and copper could reach 98.73% and 98.96%, respectively. The degradation of total cyanide followed the pseudo-first-order kinetics. The photoelectric properties of GTZ-60 obviously improved the migration and separation of photogenerated electrons ( e − ) and holes ( h + ), so that high photocatalytic efficiency was obtained. XPS analysis showed that cyanide was finally degraded to carbon oxide and nitrogen oxide. Copper and zinc are removed in the form of copper (Ⅱ) and zinc (Ⅱ).
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高影响因子
ELECTROANALYSIS
·
2021
·Vol. 33
·期 10
·2243-2251
·
IF 3.223
Kunpeng Miao,Long Yan,Ran Bi,Xiaoyan Ma
RGO/Au/Ni electrode was manufactured by a convenient, controllable, and environmental process, which was carried out by cyclic voltammetry (CV), and in this process, graphene-gold nanohybrid materials were simultaneously deposited on the nickel foam. Then the GOx was immobilized on the RGO/Au/Ni electrode by covalent bonding, and obtained the enzymatic biosensor. Scanning electron microscope (SEM) and Raman spectroscopy were adopted to confirm the microstructure of the fabricated RGO/Au/Ni electrode. Fourier transform infrared spectroscopy (FT-IR) was used to characterize the prepared enzymatic electrode. CV, chronoamperometry, and electrochemical impedance spectroscopy (EIS) were used to characterize the electrochemical performance of the fabricated enzymatic biosensor. It is found that AuNPs were well dispersed on the wrinkled RGO sheets, and the biosensor had a high sensitivity to glucose (32.83 μA ⋅ mM −1 ⋅ cm −2 ) with a wide linear range (0.15 26.15 mM), the strengths of anti-interference ability, good stability, and repeatability, etc.
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高影响因子
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