Small
·
2018
·Vol. 15
·期 5
·1804158
·
IF 9.598
Lei Liu,Yu Chen,Yihao Xie,Peng Tao,Zijing Wang,Qingyi Li,Kexin Wang,Chenglin Yan
Slow ion kinetics of negative electrode materials is the main factor of limiting fast charge and discharge of batteries. Sluggish Na + kinetics property leads to large electrode polarization, resulting in poor rate and cyclic performances. Herein, an electrode of ultrasmall tin nanoparticles decorated in N, S codoped carbon monolith (TCM) with exceptional high-rate capability and ultrastable cycling behavior for Na-storage is reported. The resulted TCM electrode exhibits an extremely high retention of 96% initial charge capacity after 500 cycles at a current density of 500 mA g −1 . Significantly, when the current density is elevated to an ultrahigh rate of 5000 mA g −1 , a high reversible capacity of 228 mAh g −1 after the 2000th cycle is still maintained. More importantly, the stable and fast Na-storage of TCM is investigated and understood by experimental characterizations and kinetics calculations, including interfacial ion/electron transport behavior, ion diffusion, and quantitative pseudocapacitive analysis. These investigations elucidate that the TCM shows improved ion/electron conductivity and enhanced interfacial kinetics. An entirely new perspective to deep insights into the fast ion/electron transport mechanisms revealed by interfacial kinetics of sodiation/desodiation, which contributes to the profound understanding for developing fast charging/discharging and long-term stable electrodes in sodium-ion batteries, is provided.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Hu Zhang,Jian Yin,Dandan Ouyang,Yu Liu,Ruiyao Wu,Rui Zhang,Ruiqiang Huo,Gaixiu Yang,Yanjun Cai,Jiao Yin
The plateau capacity of a hard carbon anode plays a crucial role in achieving the high energy density of sodium-ion batteries. However, the loss of plateau capacity due to polarization at high current densities imposes significant limitations on hard carbon applications. Ultra-micropores could maintain plateau capacity at high current densities but are generally prepared accompanied by micropores and mesopores that deteriorate the Na-ion storage performance. Herein, a hard carbon with ultra-micropores is prepared by a protonation-mediated strategy using an N, P co-doped biomass precursor. The P dopants favor reducing the interaction between N and C so that the confined volatiles of NH3 could be utilized to create ultra-micropores concentrated at 0.4–0.8 nm. These ultra-micropores enable the hard carbon to deliver a reversible capacity of 386 mA h g−1 at 20 mA g−1, a high plateau capacity of 173 mA h g−1, and an excellent rate capability of 106 mA h g−1 at 2 A g−1. The plateau capacity and rate capability are superior to those of the reported hard carbons. This work provides a new approach for ultra-micropore construction within hard carbons and a new perspective for sodium-ion batteries toward high energy and power densities.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Yihan Yun,Wenlong Xie,Zhihua Yang,Guangmao Li,Shilie Pan
Birefringent materials are of great important as opto-electronic functional devices in solid laser system. Investigations on the design of new birefringent materials with large birefringence is meaningful. In this study, structure-birefringence relationship between AgGaS 2 (AGS) and NaGaS 2 (NGS) was systematically investigated. In the structures, the high ionic Na + cations broke the three dimensional (3D) [GaS] network to 2D layers, which results in the regular packing of GaS 4 tetrahedra and further the birefringence (~0.09, nearly twice that of AGS at ~1064 nm). Meanwhile, the blue-shift of the UV cutoff edge to 307 nm and a wide band gap of 3.9 eV has been observed in NGS. The property characterizations were carried out using the as-grown NGS single crystal with a size of 4 × 4 × 0.3 mm 3 by high temperature flux method. The results indicate that NGS may be a promising IR birefringent material and the cation substitution-oriented design strategy could be used to regulate the structure and optical properties of materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
·
2015
·Vol. 53
·期 14
·1020-1026
·
IF 3.83
Ting Li,Shuangfei Xiang,Piming Ma,Huiyu Bai,Weifu Dong,Mingqing Chen
A new kind of nanocomposite (NC) hydrogel with Na-montmorillonite (MMT) is presented in this article. The NC hydrogels were synthesized by free radical copolymerization of acrylamide and (3-acrylamidopropyl) trimethylammonium chloride (ATC) in the presence of MMT and N,N ′-methylene-bis-acrylamide used as chemical cross-linker. Due to the cation-exchange reaction between MMT and ATC (cationic monomer) during the synthesis of NC hydrogels, MMT platelets were considered chemical “plane” cross-linkers, different from “point” cross-linkers. With increasing amount of MMT, the crosslinking degree enhanced, causing a decrease of the swelling degree at equilibrium. Investigations of mechanical properties indicated that NC hydrogels exhibited enhanced strength and toughness, which resulted from chemical interaction between exfoliated MMT platelets and polymer chains in hydrogels. Dynamic shear measurements showed that both storage modulus and loss modulus increased with increasing MMT content. The idea described here provided a new route to prepare hydrogels with high mechanical properties by using alternative natural Na-MMT. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2015 , 53 , 1020–1026
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2016
·
IF 2.628
Na Li,Dan Xu,Di Bao,Jinling Ma,Xinbo Zhang
Rechargeable Na-O 2 batteries have attracted significant attention as energy storage devices owing to their theoretically high energy storage capacity and the natural abundance of sodium. However, practical applications of this type of battery still suffer from low specific capability, poor cycle stability, instable electrolytes, and unstable polymer binders. Herein, we report a facile method of synthesizing binder free and flexible cathodes with Co 3 O 4 nanowire arrays vertically grown onto carbon textiles. When employed as a cathode for Na-O 2 batteries, this cathode exhibits superior performance, including a reduction of charge overpotential, high specific capacity (4687 mAh/g), and cycle stability up to 62 cycles. These enhanced performance can be attributed to the synergistic effect of the porosity and catalytic activity of the Co 3 O 4 nanowire catalyst.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
POULTRY SCIENCE
·
2024
·
IF 3.8
Meng Zhang,Pengfei Du,Jin Wan,Yimeng Chen,Xin Chen,Yumei Zhang
ABSTRACT Sodium dehydroacetate ( DHA-Na ) is a fungicidal preservative widely used in food and animal feed. DHA-Na can induce coagulation disorders in rats and poultry by inhibiting carboxylation of vitamin K-dependent proteins; it can also impair bone development in zebrafish. However, the effects of DHA-Na on broiler chicken bones remain unknown. Here, we assessed whether DHA-Na impairs bone development in broiler chickens. We administered Suji yellow chickens with 200 to 800 mg/kg DHA-Na, 2 mg/kg vitamin K, or both for 2 mo. Bone metabolite–related serum indicators, tissue micromorphology, and relevant protein expression were monitored during the treatment period. We also assessed primary chicken osteoblast activity, differentiation, and bone metabolite–related proteins after treatment with DHA-Na, vitamin K, or both. The results demonstrated that DHA-Na reduced bone index values and serum and bone osteoblast differentiation marker levels but blocked bone vitamin K cycle. DHA-Na also increased serum osteoclast differentiation marker levels, as well as the bone ratio of receptor activator of nuclear factor kappa-Β ligand to osteoprotegerin ratio. Moreover, DHA-Na reduced bone trabecular number, thickness, and area and increased trabecular separation considerably. In general, compared with the control group, the DHA-Na group demonstrated impairments in osteoblast activity and differentiation, as well as in the vitamin K cycle. By contrast, vitamin K supplementation led to considerable attenuation of the DHA-Na-induced decrease in osteogenic marker levels, along with a considerable increase in serum bone absorption marker levels and restoration of DHA-Na-induced bone microstructure damage. Vitamin K also attenuated DHA-Na-induced impairment in osteoclasts. In conclusion, the results indicated that in broiler chickens, DHA-Na supplementation can damage bones by inhibiting osteoblast function and increasing osteoclast activity; this damage can be prevented through vitamin K supplementation.
研究领域:
动物科学
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营养学
·
兽医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2024
·
IF 13
Boyu Li,Xiaohui Liu,Xuanting He,Jiaxiang Liu,Shun Mao,Wenquan Tao,Zhuo Li
Mixed matrix composite membranes (MMCMs) have shown advantages in reducing VOCs and CO 2 emissions. Suitable composite layer, substrate, and good compatibility between the filler and the matrix in the composite layer are critical issues in designing MMCMs. This work develops a high-performance UiO-66-NA@PDMS/MCE for VOCs adsorption and CO 2 permea-selectivity, based on a simple and facile fabrication of composite layer using amidation-reaction approach on the substrate. The composite layer shows a continuous morphological appearance without interface voids. This outstanding compatibility interaction between UiO-66-NH 2 and PDMS is confirmed by molecular simulations. The Si─O functional group and UiO-66-NH 2 in the layer leads to improved VOCs adsorption via active sites, skeleton interaction, electrostatic interaction, and van der Waals force. The layer and ─CONH─ also facilitate CO 2 transport. The MMCMs show strong four VOCs adsorption and high CO 2 permeance of 276.5 GPU with a selectivity of 36.2. The existence of VOCs in UiO-66-NA@PDMS/MCE increases the polarity and fine-tunes the pore size of UiO-66-NH 2 , improving the affinity towards CO 2 and thus promoting the permea-selectivity for CO 2 , which is further verified by GCMC and EMD methods. This work is expected to offer a facile composite layer manufacturing method for MMCMs with high VOC adsorption and CO 2 permea-selectivity.
研究领域:
材料科学
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环境工程
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Weize Jin,Tao Zhou,Zhaolei Wang,Wenwen Xue,Chun Feng,Fang Zhang,Xiaoyu Huang,Dong Yang,Patrick Théato,Yongjun Li
Covalently grafting redox-active polymer to graphene sheets is a practical approach for developing high-performance organic cathode materials . Here, we report a facile preparation of radical polymer poly(2,2,6,6-tetramethylpiperidin-1-oxyl-4-yl methacrylate) (PTMA) grafted graphene sheets (rGO) composites (rGO- g -PTMA) with various PTMA contents via one-step radical polymerization , and their applications as cathodes for Li-ion/Na-ion batteries. The energy storage capacity of rGO- g -PTMA is determined by the relative contribution from the battery-type redox reaction of PTMA and the pseudocapacitive behavior of rGO sheets. The optimized rGO- g -PTMA 50 composite with 50 wt% of PTMA shows excellent energy storage performance, which is almost two times higher than that of the physically blended rGO/PTMA 50 owing to reduced solubility of PTMA in electrolyte solution and improved electrical conductivity . As cathode materials for Li-ion/Na-ion batteries, rGO- g -PTMA 50 shows superior performance including high capacity, good cycling and rate stability. Hence, this covalently bonded radical polymers on graphene provide new option for developing high-performance organic cathode materials for Li-ion/Na-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
高分子化学
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Yingfang Tao,Jie Lin,Deyin Wang,Yuhua Wang
A new type of carbon dots that emit blue emission in aqueous state while cyan emission in solid state was synthesized by a simple hydrothermal method. The photoluminescence quantum yield of the carbon dots in aqueous state and solid state is 7.6% and 29.2%, respectively. The enhanced and red-shifted emission observed in solid state carbon dots is ascribed to surface state change caused by aggregation. The occurrence of surface state change in solid state carbon dots has been evidenced by concentration dependent steady-state photoluminecence spectra and time-resolved luminescence decay. Surface functionalization by Na + is beneficial for carbon dots to resist luminescence quenching in solid state. A proof-of-concept study was performed to demonstrate the potential application of the obtained carbon dots as inks for anti-counterfeiting and printing high quality fluorescent images.
研究领域:
材料科学
·
纳米技术
·
光学材料
·
光致发光
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2017
·Vol. 27
·期 28
·1701130
·
IF 12.124
Dunping Cao,Congling Yin,Dingren Shi,Zhengwen Fu,Jincang Zhang,Chilin Li
Exploring novel structure prototype and mineral phase, especially open framework material, is crucial to developing high-performance Na-ion battery cathodes in view of potentially faster intrinsic diffusion of Na + in lattices. Perovskite phases have been widely applied in solar cells, fuel cells, and electrocatalysis; however, they are rarely attempted as energy storage electrode materials. This study proposes pre-expanding perovskite iron fluoride (KFeF 3 ) framework by stuffing large-sized K + as a channel filler, which is advantageous over Na + , NH 4 + , and H 2 O molecule filler in terms of structure robustness, symmetry, and connectivity. K + stuffing leads to the preservation of a more “regular” cubic phase with fast isotropic 3D diffusion as a consequence of no distortion of FeF 6 octahedra during K-Na electrochemical exchange and following Na-insertion cycling. High-rate Na-storage is achievable with a reversible capacity of 110, 70, and 40 mAh g −1 at 0.1, 2, and 10 C, respectively, for this open framework fluoride cathode, benefiting from solid solution electrochemical behavior and high intrinsic diffusion coefficient. It is thought that this rate performance is currently the best among Na-storage fluoride materials.
研究领域:
材料科学
·
储能
·
电化学
·
无机化学
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Jiaming Hu,Shuai Zhang,Chen Feng,Shanggeng Li,Longfei Zhang,Jiajun Ma,Qiang Yin
In this work, an efficient Fe 3+ adsorbent was synthesized by using the tryptamine and sodium carboxymethyl cellulose (CMC-Na) modified polyacrylamide gel. The functional monomers synthesized by the reaction of tryptamine and methacrylic acid chloride were doped into the composition, and CMC-Na participated in the formation of the gel network. By changing different conditions, the optimal use conditions of the gel were explored. The Langmuir and Freundlich isotherm models were used to discuss the adsorption behavior. According to the fitting results, the Freundlich model was more suitable for explaining the adsorption of Fe 3+ by gels. The feasibility of its adsorption process was confirmed by the study of its kinetics and thermodynamics. As an adsorbent, tryptamine CMC-Na modified polyacrylamide gel has excellent ability to remove Fe 3+ from aqueous solutions. The maximum adsorption capacity of tryptamine and CMC-Na modified polyacrylamide gel for Fe 3+ reached 127.5 mg g −1 .
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
·
2026
·Vol. 223
·期 6
·e202500691
·
IF 2
Jiasheng Lv,Jiazhen Wu,Jungu Xu
The sodium-conductive ceramic Na-β-Al 2 O 3 serves as an indispensable solid electrolyte material in Na-S battery systems, primarily owing to its exceptional ionic transport properties for Na + ions coupled with remarkable resistance to thermal degradation. However, its limited conductivity at low temperatures restricts practical applications, necessitating strategies to enhance performance. In this paper, a series multicomponent-doped Na 2 Al 10−5 x (Li 2 x Mg x Zn x Ni x )O 16−3.5 x ( x ≤ 0.4) was synthesized through solid-state reaction method, with their phases, microstructures, and electrical properties being thoroughly studied. The results revealed that the highest ionic conductivity (1.2 × 10 −2 S/cm at 300°C) was achieved for the sample x = 0.1, which is five times higher than that of the parent material, significantly exceeding the undoped sample (2.38 × 10 −3 S/cm at 300°C). In addition, the sodium ion migration pathways in Na-β-Al 2 O 3 -based materials were investigated by the bond-valence-based method.
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产品关联
DOI
高影响因子
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