ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Hanxin Qian,Zhan Wu,Zhouyu Huang,Menglu Lu,Jiayuan Xiang,Fangfang Tu,Zheyu Jin,Jianping Xu,Yongping Gan,Xinping He,Hui Huang,Xinhui Xia,Yang Xia,Wenkui Zhang,Jun Zhang
Sodium-ion batteries (SIBs) are promising for large-scale energy storage due to their high cost-effectiveness and safety. Alloy anodes exhibit significantly higher specific capacities compared to those of carbonaceous anode materials, holding great promise for enhancing the energy density of SIBs. However, their practical application is severely hindered by substantial volume expansion, sluggish reaction kinetics, and continuous fracture reformation of the solid-electrolyte interphase (SEI). Here, a multifunctional composite binder system was designed for the Sn anode, which was composed of poly(ethylene oxide) (PEO), sodium alginate (SA), and sodium bis(trifluoromethylsulfonyl)imide (NaTFSI). The PEO-SA-NaTFSI (PSN) binder integrates ternary synergistic functions: robust adhesion between the active material and current collector, enhanced Na+ transport kinetics, and formation of a stable NaF-rich SEI. Therefore, the Sn-PSN anode achieves an outstanding sodium storage performance with a high capacity of 583.4 mA h g–1 at a current density of 10 A g–1 and 77% capacity retention after 1500 cycles. In addition, the Sn-PSN||Na3V2(PO4)3 full battery can maintain 81% capacity after 200 cycles with an electrode energy density of 169.0 W h kg–1. This work provides a multifunctional binder design strategy with broad application prospects for high-performance anodes of SIBs.
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高影响因子
RARE METALS
·
2025
·Vol. 44
·期 5
·3339-3350
·
IF 11
Wang Wen-Ying,Zhu Jun-Liang,Bo Lin,Zhou Wen-Ying,Liu Xing-Shuo,Li Chang-Cun,Zhang Zheng,Zhao De-Gang
The rock-salt cubic SnSe compound with multiple valleys and inherent low thermal conductivity is considered to be a promising thermoelectric compound. In this study, heterogeneous Pb atoms were strategically introduced into the lattice of cubic SnSe matrix, synergistically adjusting the thermoelectric transport properties of samples by optimizing hole carrier concentration ( n ) and suppressing thermal conductivity ( κ tot ). When the doping content reached 0.08 mol, the peak power factor (PF) at 300 K increased to 20.00 μW·cm –1 ·K –2 . The growing internal microstrain induced by the differences in atomic size strengthened the phonon scattering and effectively reduced the lattice thermal conductivity ( κ L ). With further decoupling of the electrical and thermal transport properties, a peak thermoelectric figure of merit ( ZT ) of 0.82 and an average ZT of 0.42 (300–750 K) were achieved in the samples doped with 0.10 mol Pb. These findings highlight the effectiveness of the selected dopants and demonstrate their synergy in improving the performance of thermoelectric materials. Graphical
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POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Qian Geng,Yueyue Yu,Zhiyong Xu,Yuhui Xie,Feng Wu,Wenbo Zhao,Yi Mei,Delong Xie,Dong Feng
The development of flame-retardant polymer materials is essential for reducing fire hazards and protecting lives and property. Black phosphorus shows promise as a flame retardant but suffers from poor dispersion in polymer matrices. This study presents a method for preparing non-covalently functionalized black phosphorus nanosheets (BP) through composite modification with an ionic liquid (IL) and pentaerythritol phosphate (PEPA), forming IPBP, which was incorporated into an ethylene-vinyl acetate (EVA) matrix to improve both mechanical properties and flame resistance. Molecular Dynamics simulations indicate that EVA enhances interfacial interactions between IL, PEPA, and BP, resulting in stronger interaction energies and better diffusion rates. Experimental results confirm that IPBP nanosheets improve BP compatibility with EVA. Combustion tests show that a 1.5 wt.% IPBP/EVA composite achieved a V-0 rating in the UL-94 test, reducing total heat release (THR) and peak heat release rate (PHRR) by 35.9% and 35.5%, respectively. Moreover, the tensile yield stress of IPBP/EVA increased by 23.3% and 10.8% with 0.5 and 1.0 wt.% IPBP, while that with 1.5 wt.% IPBP is comparable to pure EVA resin. This work provides an effective strategy for designing flame retardants to improve the fire resistance of EVA materials.
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Small Methods
·
2025
·
IF 9.1
Maoqiang Shen,Yang Liu,Xinyue Gao,Xuesen Liu,Yanhao Zhao,Linrui Hou,Changzhou Yuan
Typical shuttle effect of lithium polysulfides (LiPSs) and slow kinetics of redox reactions seriously hinder the potential application of lithium–sulfur batteries (LSBs). Herein, a titanium based ternary accordion heterostructure (i.e., TiC-TiN-TiO 2 ) is first fabricated through an acid-assisted eutectoid reaction of Ti 3 CN MXene obtained via efficiently gas-etching of Ti 3 AlCN MAX. The in situ crystal reconstruction not only creates functional sur/interface configuration but generates built-in electric field (BIEF) at the crystal interfaces, which induce interfacial charge redistribution and accelerate electronic/ionic conductions of the whole heterostructures. Besides, the well-defined functions of conductive TiC, adsorptive TiO 2 , and catalytic TiN enable the efficient fixation and conversion of LiPSs. Accordingly, LSBs assembled with the TiC-TiN-TiO 2 modified separators demonstrate a remarkable reversible capacity of 1185 mAh g −1 at 0.5 C, and an outstanding capacity retention of 778 mAh g −1 after 500 cycles with a decay rate of 0.078% per cycle. Moreover, excellent rate capability (838 mAh g −1 at 5 C) and superior cycling stability with high sulfur loading (3.7 mg cm −2 ) and low electrolyte/sulfur ratio (6.0 µL mg −1 ) are also achieved. More significantly, the eutectoid reaction of solid solution MXenes it devised here provides an innovative avenue to design functional hierarchical heterostructures for high-performance LSBs and beyond.
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高影响因子
Crystals
·
2025
·Vol. 15
·期 7
·622
·
IF 2.4
Haoyu Zhao,Junliang Zhu,Zhonghe Zhu,Lin Bo,Wenying Wang,Xingshuo Liu,Changcun Li,Degang Zhao
Cubic phase SnSe-based materials have great potential in the field of thermoelectricity due to their reduced carrier scattering, increased band degeneracy, and ultra-low lattice thermal conductivity. Nevertheless, systematic studies on the influence of element doping on the thermoelectric properties of cubic SnSe-based materials are still relatively scarce. To enrich the research in this field, this work investigates the effects of Ge doping on the phase composition, electrical and thermal transport properties of cubic Sn0.50Ag0.25Bi0.25Se0.50Te0.50thermoelectric materials. X-ray diffraction (XRD) analysis confirmed that the Ge-doped samples exhibited a single cubic phase structure, while scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS) revealed a uniform distribution of elements within the samples. The results indicate that increasing the Ge doping content substantially enhances their electrical conductivity, albeit at the expense of elevated thermal conductivity. By optimizing the content of Ge-doping, the thermoelectric figure of merit (ZT) reached 0.74 at 750 K. Notably, while moderate Ge doping enhances electrical transport properties, excessive doping leads to a significant rise in thermal conductivity, ultimately constraining further thermoelectric performance gains.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-18
·
IF 15.7
Li Rui,Xu Kaiqi,Wen Shenhao,Tang Xiaohan,Lin Zheyu,Guo Xia,Avdeev Maxim,Zhang Zhizhen,Hu Yong-Sheng
Halides are promising solid electrolytes due to their high ionic conductivity and high oxidation potential. Here we report a superionic chloride material, NaTaCl 6 , which exhibits a high ionic conductivity of 3.3 mS cm −1 at 27 °C, being two-orders of magnitude higher than that of NaNbCl 6 (0.01 mS cm −1 ). The considerably higher conductivity exhibited by NaTaCl 6 vs. NaNbCl 6 arises from the more facile rotational/reorientational dynamics of the [TaCl 6 ] polyanions in comparison to the [NbCl 6 ] anions. [TaCl 6 ] polyanion rotation is readily activated while [NbCl 6 ] polyanion reorientation is hindered at room temperature but can be turned on as the temperature increases or under prolonged mechanical milling. The higher degree of structural disorder exhibited by NaTaCl 6 compared to NaNbCl 6 —likely attributed to its greater mechanical and phonon softness—is found to contribute to the more pronounced [TaCl 6 ] anion rotation. Anion rotation is coupled with, and facilitates, macroscopic Na + -ion diffusion. As a result, enhanced rotational dynamics are directly correlated with the higher Na + -ion conductivity observed in NaTaCl 6 . The high ionic conductivity, combined with its electrochemical stability against positive electrode materials, enables good rate capability and long-term cycling performance in solid-state cells. These findings provide insights into ion transport mechanism in the newly emerging halide solid electrolytes.
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JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Jing Zhang,Chenxiao Han,Lu Pan,Mannan Yang,Caiyin You,Yongzheng Zhang,Lujie Jia,Huihua Li,Ke Xu,Jian Su,Hongzhen Lin,Jian Wang
Aqueous zinc metal batteries (AZMBs) are promising for large-scale energy storage due to their intrinsic safety and cost effectiveness. However, the cycling stability of metallic Zn anode under low temperature surroundings is severely hindered by harmful hydrogen evolution reaction (HER) and uncontrollable dendrite growth, which is ascribed to sluggish desolvation kinetics of hydrated [Zn(H 2 O) x ] 2+ and blocked Zn 2+ diffusion kinetics. Herein, the strategy of “adsorption-sieving-catalysis” is initially proposed and the titanium nitride anchored on self-assembly porous reduced graphene oxide (TiN@RGO) as functional modulator is constructed on the surface of Zn anode. The abundant electrocatalytic sites on sieving pores significantly enhance interfacial desolvation, thereby accelerating Zn 2+ diffusion kinetics for dendrite-free plating. Consequently, TiN@RGO modified Zn delivers a long-term stripping/plating lifespan above 2600 h at 0.5 mA cm −2 and maintains reversible stability of 500 h at 2 mA cm −2 even under low temperature of 0 °C. Decreasing to as low as −8 °C, stable overpotential around 130 mV without any short-circuit is achieved. The coupled full cell with MnO 2 presents a high capacity retention of 72 % after 1000 cycles at 1.0 A g −1 at low temperature of 0 °C, providing new insights for the rational design of efficient LT-AZMBs.
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Journal of the American Chemical Society
·
2025
·
IF 15.6
Zi-Wei Wang,Jin-Da Luo,Zhong-Yuan Huang,Wanxia Li,Hao-Yuan Tan,Xiaobin Cheng,Mei-Yu Zhou,Xu-Dong Hao,Chen-Peng Luo,Chuan Wan,Linjun Wang,Yi-Chen Yin,Shuhong Jiao,Hong-Bin Yao
All-solid-state sodium batteries (ASSSBs) with a working voltage of approximately 3.5 V hold great potential for safe, sustainable, and high-energy-density electrochemical energy storage. However, 3.5 V oxide-type cathodes (e.g., NaNi1/3Fe1/3Mn1/3O2) may suffer from interfacial contact loss with solid electrolytes due to their intrinsic rigidity, resulting in irreversible capacity degradation during cycling. Herein, we report a highly deformable chloride cathode, NaFeCl4, displaying Young’s modulus of only 1.33 GPa and excellent structural reversibility. Benefiting from the soft lattice, the NaFeCl4 cathode maintains a crack-free morphology despite significant changes in structural units between tetrahedra [Fe3+Cl4] and octahedra [Fe2+Cl6] upon repeated Na+ insertion/extraction, achieving a high capacity retention of 84.4% over 500 cycles. Moreover, with only 5.2% of the cost of the NaNi1/3Fe1/3Mn1/3O2 and 3.7% of the cost of Na3V2(PO4)3 cathode, NaFeCl4 can deliver a working voltage of ∼3.45 V vs Na+/Na and energy density of ∼405 Wh kg–1. This chloride cathode offers new insight into solving the mechanical issues in solid-state systems, guiding future developments of low-cost, stable, and high-voltage cathodes for ASSSBs.
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高影响因子
DESALINATION
·
2025
·
IF 9.8
Fei Han,Aocheng Yuan,Zhi Zhang,Qingquan Deng,Jiaoting Li,Shuibo Wu,Mingdong Zhang,Jingli Mu
Radiocobalt (e.g., 58 Co and 60 Co), a critical neutron-activated corrosion product in the nuclear industry, poses great challenges due to high toxicity. Effective removal of radioactive Co 2+ from complex environments is significantly urgent. Metal sulfide ion exchangers (MSIEs) are promising adsorbents; however, limited research has focused on Co 2+ removal, especially from seawater and real-world radioactive waste. Herein, a layered K 2 Cu 2 Sn 2 S 6 (CTS-1) was reported for the efficient capture of Co 2+ . The charge-balancing K + ions are exchangeable, endowing CTS-1 with Co 2+ capture ability via an ion exchange mechanism. This mechanism leads to the releasing K + into solution and concurrently immobilizing Co 2+ , which was confirmed macroscopically and microscopically. CTS-1 exhibited Langmuir maximum adsorption capacities of 33.96 and 20.72 mg/g in deionized water and seawater at 25 °C, respectively; the overall adsorption kinetics were similar in both matrices. CTS-1 displayed excellent pH durability with >99 % removal of Co 2+ at pH 4–8 and high selectivity for Co 2+ in various natural matrices. Impressively, in seawater ( C 0 Co = 5 mg/L), CTS-1 achieved 97.38 % of Co 2+ removal with a distribution coefficient ( K d ) up to 3.817 × 10 4 mL/g, surpassing many existing adsorbents. Furthermore, CTS-1 exhibited radiation resistance; its structure and adsorption performance remained largely unchanged after a gamma radiation dose of 200 kGy. CTS-1 demonstrated the ability to remove nearly 99 % of radiocobalt from real-world radioactive wastewater, while also showing removal efficiency for other radionuclides like 51 Cr and 58 Mn. Overall, this work provides a highly promising material to tackle radiocobalt contamination in radioactive waste, greatly promoting environmental protection and safety for the radioactive industry.
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INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
·
2025
·
IF 4.6
Xu Xia,Chenyang Ma,Tianen Yang,Zhiyuan Ma,Yu Cao,Jiahuan He,Qiwen Zheng,Huaping Hong,Ji Xiong
This study investigates gradient cemented carbide with a cubic phase-free surface layer (CFL), commonly used as substrates for coated inserts to extend their service life. The tough gradient surface layer effectively prevents crack propagation, minimizing coating delamination and edge chipping. We propose using hexagonal boron nitride (h-BN) as a non-cubic nitrogen source for fabricating gradient cemented carbide with cubic (W,Ti)C, as a replacement for traditional cubic nitrogen sources. By employing powder metallurgy, we successfully created gradient cemented carbide with a CFL derived from h-BN. We also analyze the mechanism of gradient structure formation and characterize the microstructure, elemental distribution, and mechanical properties of the novel materials. The results demonstrate the feasibility of producing gradient cemented carbides with a CFL when h-BN is used as the nitrogen source. The crystal orientations at the gradient boundary are randomly distributed, showing no abrupt interface between the surface layer and the interior. Notably, titanium (Ti) and boron (B) are nearly absent in the surface layer, while cobalt (Co) shows higher concentration compared to the interior. The use of h-BN facilitates a nearly homogeneous titanium distribution in the subsurface zone, contrasting with the clustering seen when traditional cubic TiN is employed as the nitrogen source. Additionally, the thickness of the gradient surface layer can be effectively controlled by adjusting the h-BN levels, increasing with higher h-BN content in the raw materials. However, excessive h-BN addition facilitates abnormal WC phase growth in cemented carbides, and negatively affects transverse rupture strength despite the toughening effects of the cubic phase-free layer. Increased h-BN content also promotes the formation of TiB phases, which enhances the hardness of the cemented carbide.
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International Journal of Analytical Chemistry
·
2020
·
IF 1.678
Lina Huang,Hanke Li,Yuhang Li,Peng Ren,Lezhou Yi,Yang Chen,Tongmei Ma
Background. Organic tin compounds (OTCs), a group of high-risk hazardous substances, are highly concerned in safety regulation of consumer products especially for toys because they can cause serious damage to organs after prolonged or repeated exposure. Gastric juice migration is nowadays widely implemented to assess organic tin intake from toys or food-contact materials; however, the followed up detection method using sodium tetraethylborate [NaB(Et4)] as a derivatization agent may directly lead to false positive of monomethyltins (MMT). Objective. In order to avoid the phenomena of false positive of MMT in the course of laboratory testing of toys, it is necessary and important to perform relative experimental and theoretical studies to reveal the cause of false positive of MMT. Method. With metal tin powder as a representative of inorganic tin which existed in real samples, it was treated with artificial gastric juice (0.07 mol/L·HCl), followed by ethyl derivatization using sodium tetraethylborate [NaB(Et)4] and then analyzed by gas chromatography-mass spectrometry (GC-MS) according to the procedure specified in the standard of EN 71-3:2013+A3:2018 issued by the European Committee for Standardization (CEN). Results. Without any OTCs in the starting materials, MMT false positive can be reproduced by detecting 0.56 mg/L of triethylmethyltin (TEMT) together with approximately 1000 mg/L of tetraethyltin (TeET), which is similar to real samples. Further, it is demonstrated that the detected amount of TEMT is linearly related with the added amount of NaB(Et)4, and that the formation of TEMT (methyl derivative) is easier than TeET (ethyl derivative) even though the ethyl group is present in a larger amount than the methyl group. Conclusions. The phenomena of MMT false positive which occurred in the laboratory testing of toys is mainly because that TEMT is highly likely to be obtained from the reaction of inorganic tin and trace level of methylation agent impurities contained in the derivatization reagent—NaB(Et)4. To avoid MMT false positive, it is concluded that the maximum acceptable mole ratio of methylation agent impurities contained in NaB(Et)4 is approximately 0.028%. This research is helpful to be aware of methylation impurities and is favorable to avoid false judgment caused by MMT false positive in routine analysis of toys.
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ACS Nano
·
2025
·
IF 16
Kai Chen,Anjun Hu,Guo-Rui Zhu,Yuanjian Li,Jingyun Jiang,Borui Yang,Ting Li,Kun Li,Jingze Chen,Wang Xu,Zhen Wang,Ruize Xu,Wei Yang,Jian Wang,Gang Wu,Jianping Long,Zhi Wei Seh
The practical application of semisolid lithium metal batteries is impeded by inadequate ionic conductivity, suboptimal oxidation/reduction stability, and safety concerns of the electrolyte. Herein, a versatile molecular engineering strategy is proposed to construct a robust polymer framework for semisolid electrolytes, which creates highly compatible cross-linked networks by the in situ gelation of concentrated succinonitrile-based plastic crystal electrolytes and multifunctional nitrogen- and fluorine-rich monomers. This strategy allows the electrolyte to promote rapid Li-ion transpsort through weak coordination with the polymer segments. Meanwhile, the strong interactions between the polymer matrix and succinonitrile enhance their mutual solubility, reduce the crystallinity of succinonitrile, and establish fast ion-conductive pathways. The resultant electrolyte induces the formation of LiF/Li3N-rich solid electrolyte interphases and achieves uniform lithium deposition behaviors. Moreover, it mitigates fire risks by cothermally decomposing to produce fire-extinguishing gases (CO2 and NH3) and leveraging the nonflammability of succinonitrile. Significant improvements in electrochemical performance have been observed in Li symmetric, Li||LiFePO4, and Li||LiNi0.8Co0.1Mn0.1O2 cells both at room temperature and high temperature (60 °C). As a demonstration model, this molecular engineering strategy has been successfully applied to enhance thermal stability and safety in Li||LiNi0.8Co0.1Mn0.1O2 pouch cells, offering a promising solution for semisolid lithium metal batteries under extreme conditions.
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危险品化学品经营许可证（带存储）