Science China-Materials
·
2021
·Vol. 64
·期 9
·2202-2211
·
IF 8.273
Wang Yaqian,Shen Yongli,Xiao Xiong,Dai Linxiu,Yao Shuang,An Changhua
Metastable 1T′ MoTe 2 has attracted much attention as a cost-effective electrocatalyst for hydrogen evolution reaction (HER) in recent years. However, few studies were done over common stable 2H phase because it often exhibits inferior performance. Herein, stable 2H MoTe 2 with S-doped Te vacancies has been synthesized by one-step telluride conversion of 1T MoS 2 at 700°C under Ar/H 2 atmosphere. It is demonstrated that the synergistic effect of S-doping and Te vacancies changes the electronic structures of the catalyst. Density functional theory (DFT) studies show that plentiful electrons accumulate on the surface S atoms in S-doped Te vacancies of 2H MoTe 2 catalyst, which may be as active sites to promote HER. Moreover, the as-synthesized catalyst can be directly used as working electrode, and realizes current density of 100 mA cm −2 at overpotential of 217 mV with Tafel slope of 94 mV dec −1 . This work stimulates intensive studies on the activation of inert phase of other nanocatalysts towards various reactions.
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Yanyan Liu,Zhaorui Min,Jianchun Jiang,Kang Sun,Jie Gao,Yuan Shang,Baojun Li
Construction of tightly bonded interfaces is an indispensable and critical strategy for promoting the catalytic performances of composite structures. In this study, a novel two-dimensional (2D) composite was successfully fabricated through the simultaneous formation of cobalt sulfide (Co9S8) nanosheets and N-, S-doped graphene (NSG). Cobalt–thiourea with graphene oxide was used as the precursor for a low-temperature and one-step pyrolysis. The optimal Co9S8/NSG-220 achieved a small onset overpotential of 147 mV, a low Tafel slope of 97 mV·dec–1, superior long-term durability after 16 h, and high faradic efficiency (nearly 100%) for the hydrogen evolution reaction (HER) in an acid electrolyte. The tightly bound sheet-on-sheet structure significantly enhanced the intrinsic catalytic activity due to the mutual activation effects between the components. Based on the experimental investigation and density functional theory calculations, the mutual activation effects induced by the electron transfer across the active interface constructed between NSG and Co9S8 was proposed as a key factor in the origin of superior catalytic activity. The HER catalytic activities were further improved by doping Mo into the composites. This design inspires new thoughts for exploring 2D composites prepared using molecular precursors with controlled compositions and morphologies as performance-enhanced electrocatalysts for future sustainable clean energy conversion.
研究领域:
材料科学
·
电化学
·
能量转换
·
纳米技术
·
催化
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Lei Zhong,Yudi Mo,Kuirong Deng,Shuanjin Wang,Dongmei Han,Shan Ren,Min Xiao,Yuezhong Meng
A slightly cross-linked lithium borate containing single ion-conducting polymer (LBSIP) as a bifunctional binder for lithium sulfur batteries is designed and fabricated via a one-step thiol–ene click reaction. The LBSIP binder exhibits a maximum peeling strength of over 600 mN mm–1 between the sulfur cathode and aluminum foil, together showing a high lithium ion diffusion coefficient of 2.1 × 10–12 cm2 s–1. Owing to the unique electron-donating groups, the binder can provide a good ionic conductive network and a dramatically enhanced polysulfide-trapping feature. The strong interaction between electron-donating groups of LBSIP with Li2S6 was confirmed by the 7Li-NMR analysis and density-functional theory calculation. The cathode using the LBSIP binder exhibited a high Coulombic efficiency of ∼100% and an initial specific capacity of 712 mAh g–1 with a capacity fading rate of 0.06% per cycle after 500 cycles at 0.5 C. Even at a high current rate of 2 C, a reversible capacity of over 500 mAh g–1 was still obtained. However, the capacity of the cathode using the PVDF binder decreased to 331 mAh g–1 after 180 cycles at 0.5 C. This work is very attractive for the rational design of functional binders for Li–S batteries with both ion-transporting and polysulfide-trapping features.
研究领域:
材料科学
·
储能
·
电化学
·
高分子化学
·
电池技术
✓ 已验证
DOI
高影响因子
RSC Advances
·
2026
·Vol. 16
·期 3
·2610
·
IF 4.6
Chong Chen,Yongxiang Su,Wenxiu Zhong,Keying Zhang,Pinghua Zhang
The conversion of low-cost, sustainable biomass into high-value porous carbon as an electrode material for supercapacitors has attracted considerable recent attention. Almost all efforts are focused on developing advanced carbon electrode materials without conducting large-scale experiments. Utilizing cotton pulp board as the prototype, we demonstrate that honeycomb-like porous carbon could be completely and repeatedly obtained by a one-step activation method. The preparation method is facile and industrially feasible, and could be used for the scalable production of multiple heteroatom-doped honeycomb-like porous carbon (MHDHPC) with excellent reproducibility and high yield. MHDHPC exhibits ultrahigh gravimetric capacitance and volumetric capacitance due to its high surface area, ultrahigh microporosity, relatively high density and surface heteroatom-rich nature. A MHDHPC//MHDHPC based symmetric supercapacitor can deliver a superior volumetric energy density of 13.1 Wh L −1 in 6 M KOH. These exciting results provide a sustainable, scalable and low-cost method to prepare MHDHPC for high volumetric-performance supercapacitors. The conversion of low-cost, sustainable biomass into high-value porous carbon as an electrode material for supercapacitors has attracted considerable recent attention.
✓ 已验证
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2026
·
IF 9.8
Qingmiao Zhang,Hangcheng Yang,Binglin Zhang,Junyao Chang,Xiaozhong Du,Zishang Wang,Guiyin Xu,Lingjie Meng,Yu Chen,Hongkang Wang
Heteroatom doping and carbon coating are essential techniques for improving the conductivity and reaction kinetics of intercalation-type anode materials in lithium-ion batteries. However, it is difficult to achieve heteroatom doping and carbon coating at the same time through simple processes. Here, we propose a simple method to simultaneously achieve carbon-coating and P/S/N triple-doping by introducing polyphosphazene (PZS) as precursor. We first prepare PZS-coated titanium-based metal-organic frameworks (MIL-125), which can be readily converted into phosphorus/sulfur/nitrogen (P/S/N) co-doped carbon-coated titanium dioxide (TiO 2 ) nanocomposites (PSN-C@TiO 2 @C) by simple calcination under an inert atmosphere. The heteroatom doping and carbon hybridization synergistically enhance the conductivity and ion diffusion of the PSN-C@TiO 2 @C, which not only change the local charge density of the nanocomposite, but also generate more active sites. Benefiting from the above advantages, the well-designed PSN-C@TiO 2 @C anode exhibits significantly improved specific capacity and rate performance, maintaining high reversible specific capacities of 272.2 mA h g −1 after 1000 cycles at 1000 mA g −1 and 141.1 mA h g −1 after 2000 cycles at 5000 mA g −1 . This study presents a novel simplified method for multi-element-doping and carbon-coating, which can be generally applied for developing advanced electrode materials for energy storage application.
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2026
·
IF 6.2
Xiaoxue Mao,Zhiyong Xiong,Yuhao Xiang,Shihang Guo,Xin Chen,Hongyang Zeng,Jian Jiang,Sirui Wan,Yi Li,Maowen Xu
Room-temperature sodium–sulfur batteries (RT Na–S) hold great potential for energy storage due to the abundance of sodium and sulfur, low costs, and high theoretical energy density. However, their development is limited by the shuttle effect of polysulfides, slow reaction kinetics, and the growth of sodium dendrites. These issues lead to rapid capacity decay and poor cycling stability, which are difficult to mitigate using traditional separators. Inspired by ion channels in biological membranes, we developed a carboxylate-modified MIL-121/Na separator. Its sub-nanometer channels enable highly selective Na+ transport with an ionic conductivity of 2.27 × 10−4 S cm−1, a migration number of 0.74, and a wide electrochemical window of up to 5.1 V. When applied in RT Na–S batteries, it effectively inhibits the polysulfide shuttle and promotes the reaction kinetics, achieving a first-cycle discharge capacity of 1182 mAh g−1 at a 0.5C rate and stable cycling for over 400 cycles, demonstrating excellent rate performance and long cycle life. Even in pouch cells, the performance can be stabilized at a 1C rate for 100 cycles and the cycle-to-cycle stability can be maintained. This study provides a new strategy for separator design to advance high-performance sodium–sulfur batteries.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Magnesium and Alloys
·
2026
·
IF 15.8
Yulin Huang,Fenghua Wei,Yang Zhang,Xinan Zhang,Yiming Wang,Chen Huang,Yuke Li,Jingcai Chang
Interactions between metals and heteroatom-coordinated sites on the carbon matrix are crucial for enhancing the kinetics and thermodynamics of Mg/MgH 2 . Herein, we reported a sustainable K 2 FeO 4 activation strategy that converts high-sulfur petroleum coke into a sulfur self-doped porous carbon hosting FeNi–S coordinated active sites. Tailoring the alloyed electronic structure and exposing more catalytically active sites substantially enhanced the hydrogenation and dehydrogenation kinetics of Mg/MgH 2 with (FeNi)S@PPC. Its peak dehydrogenation temperature was 95.39 °C lower than that of ball-milled MgH 2 . In addition, it enabled MgH 2 to release 4.89 wt.% H 2 within 20 min at 275 °C, exceeding its sulfur-free counterpart (FeNi)@PPC by 1.41 wt.%. Moreover, the (FeNi)S@PPC/MgH 2 showed 99.5% capacity retention after 30 cycles, indicating excellent reversibility. Mechanistic investigations revealed that intrinsic sulfur self-doping induced a stable FeNi–S coordination environment, which lowered the D-band center of FeNi to −1.349 eV. The electronic redistribution was found to weaken the FeNi–(H) intermediate, lowering the dissociation and diffusion energy barrier by 0.39 eV and facilitating hydrogenation. This also reduced the energy required for Mg–H dissociation into H 2 by 0.65 eV. Consequently, the dehydrogenation activation energy was decreased to 97.09 kJ·mol − 1 , with the rate-limiting step shifting to a low-energy barrier three-dimensional interfacial reaction (R3 model). Overall, this study establishes a green valorization route for high-sulfur petroleum coke and elucidates a fundamental metal–sulfur charge transfer mechanism that substantially enhances magnesium-based hydrogen storage.
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2026
·Vol. 18
·期 5
·604
·
IF 5.8
Shengtao Pan,Wenhu Wu,Xinfang Wang,Huan Guan,Huaguang Yu,Jiyan Liu,Zuogang Huang,Xueqing Liu
Liquid crystalline poly(ester imide)s (LCPEIs) were synthesized by solution polymerization from 4-hydroxybenzoic acid (4-HBA), 6-hydroxy-2-naphthoic acid (HNA) and N -(3-carboxyphenyl)-4-hydroxyphthalimide (3-CHP), with the capping groups of benzocyclobutene (BCB)-containing compounds (BCB-HP for phenolic hydroxyl group and BCB-CP for aromatic carboxylic acid). Subsequent cross-linking of the BCB capping groups upon hot pressing afforded the cured LCPEI films. Optimal properties of these films were achieved by adjusting the capping BCB-HP/BCB-CP contents.These LCPEIs showed favorable thermal properties with a relatively high glass transition temperature ( T g , 137–167 °C) and low melting temperature ( T m , 186–194 °C). With the increase in BCB capping content, the tensile modulus, tensile strength, and coefficient of thermal expansion (CTE) exhibited a non-linear tendency of first decreasing and then increasing. LCPEI-3.0 (3 mol% BCB) showed optimal performance: a relatively low CTE (20 × 10 −6 K −1 ), a relatively high storage modulus (2.55 GPa), a moderate tensile modulus (2.65 GPa), a relatively low dielectric constant ( Dk = 3.17) with low dielectric loss ( Df = 0.0034) at 10 GHz, and excellent hydrophobicity (water contact angle = 133°). This improvement embodies an effective strategy to combine advantages of polyester, polyimide, and benzocyclobutene to achieve favorable and excellent comprehensive properties for convenient processability and practical application prospects.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Shiwei Ge,Qian Zhao,Weijian Du,Weikun Jiang,Yu Liu
A TiO 2 -TiS 2 heterostructure decorated on S, O-MXene was successfully constructed. • TiO 2 -TiS 2 heterostructure mitigates MXene stacking and facilitates Li + diffusion. • The design of TiO 2 /TiS 2 ratio can balance the adsorption-catalysis trade-off. • S, O functional groups on MXene offer additional anchoring and catalytic sites. • The SM-TT interlayer enhances the cycle and rate performance of Li-S batteries. The practical application of lithium-sulfur (Li-S) batteries is impeded by polysulfides shuttling and sluggish sulfur redox kinetics. Although Ti 3 C 2 T x MXene has demonstrated great potential for polysulfides adsorption and conversion, its restacking tendency significantly diminishes its practical effectiveness. To address this critical issue, we designed and fabricated a TiO 2 -TiS 2 heterostructure decorated on sulfur and oxygen-functionalized MXene (SM-TT) through a controlled sulfurization strategy. This well-engineered architecture not only suppresses MXene restacking but also constructs abundant heterointerfaces that synergistically facilitate electron and Li + transport. Moreover, the rationally designed TiO 2 /TiS 2 ratio can well balance the adsorption-catalysis trade-off of polysulfides. Additionally, the sulfur and oxygen functional groups on MXene surface provide additional active sites for polysulfides anchoring and catalytic conversion. When employed as multifunctional interlayer in Li-S batteries, the SM-TT interlayer enables the cell to deliver a high initial capacity of 1292.8 mAh g −1 at 0.1C, maintain 768.6 mAh g −1 after 100 cycles, and exhibit 604.7 mAh g −1 at 1 C. Even under 5 mg cm −2 high sulfur loading, the cell still retains stable capacity of 722.7 mAh g −1 after 100 cycles. This work demonstrates an effective heterointerface engineering strategy for developing high-performance Li-S batteries. Download: Download high-res image (163KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
Nature Communications
·
2026
·
IF 18.1
Lu Chengxing,Li Boyu,Li Qun,Liu Shuaishuai,Cheng Jinnuo,Yan Jiahao,Wang Zemin,Liu Tong,Wang Jinkai,Zhao Qing
Sluggish kinetics and shuttle effects hinder high-energy rechargeable sodium-chalcogen batteries, requiring nanostructured positive electrodes with excess conductive additives. Here, we show that an acidic binder-induced corrosion strategy enables activity in bulk S/Se/Te positive electrodes. Carboxylic acid-rich binders create an acidic microenvironment (pH≈3) during processing, triggering spontaneous formation of copper chalcogenide interlayers on Cu current collectors. These interlayers reconstruct into active Cu 2 X (X = S/Se/Te) catalysts during cycling. Using Na-Se batteries, experimental and DFT analyses confirm Cu 2 Se reduces the liquid-solid conversion barrier by ~24.1% and accelerates polyselenides conversion. Polar groups in the binders enhance chemisorption, reducing the shuttling effect. Consequently, bulk Se with alginic acid binder achieves 96% theoretical utilization at 0.1 A g ‒1 , rate capability of 508 mAh g ‒1 at 20 A g ‒1 , stable cyclability at 5 A g ‒1 over 16,000 cycles, and low-temperature operation at 0.1 A g ‒1 (94% capacity retention at −20 °C). The strategy of transforming binders into active interface modulators provides a generalizable approach for other chalcogens, enabling practical and host-free rechargeable metal batteries with chalcogen positive electrodes.
✓ 已验证
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2026
·
IF 3.3
Cai-Ming Liu,Yi-Quan Zhang,Xiang Hao,Xi-Li Li
It is still a major challenge to construct multifunctional complexes using axial chiral ligands. Herein, the axial chiral ligands (R)/(S)-1,1'-binaphthyl-2,2'-diyl hydrogen phosphate (R-HL/S-HL) was used as a bridging ligand, and together with the Schiff base bridging ligand {H2LSchiff = [2-[(E)-(5-fluoro-2-hydroxyphenyl)methylidene]diazanyl](4-chloropyridin-2-yl)methanone}, two pairs of homochiral Dy2 complexes [Dy2(R-L/S-L)2(LSchiff)2(DMA)2]·3DMA·4H2O (R-1/S-1) and [Dy2(R-L/S-L)2(LSchiff)2(DMF)2]·3DMF (R-2/S-2) were successfully constructed at room temperature in different solvents (DMA vs DMF). Interestingly, although their coordination modes as terminal ligands are very similar, the subtle differences between DMA and DMF molecules cause changes in the space groups: R-1 and S-1 crystallize in the P1 chiral space group whereas R-2 and S-2 in the P212121 chiral space group, which may affect their nonlinear optical properties: R-1 and S-1 exhibits both SHG and THG responses, while R-2 and S-2 only displays a THG response. Notably, R-1/S-1 and R-2/S-2 are ferromagnetic coupling, and behave as single-molecule magnets (SMMs) at 0 Oe, and their magnetic properties were further studied using Ab initio calculations. Moreover, the magneto-optical effects of R-1/S-1 and R-2/S-2 were investigated by their magnetic circular dichroism (MCD) spectra.
✓ 已验证
DOI
PubMed
高影响因子
ACS Nano
·
2026
·
IF 17.3
Tianyi Ma,Fanshi Wu,Yue Lou,Xiaokun Li,Kangpeng Jin,Xiyang Wang,Pengfei Xu,Zhan Shi,Biao Xu
This study presents a phase-regulation strategy for enhancing the thermoelectric performance of BiSbSe3-based materials through the controlled formation of a semiconductor–semimetal heterostructure. By incorporating sulfur and aluminum dopants, a hexagonal phase is induced within an orthorhombic BiSbSe3 matrix, thereby establishing a bidirectionally adjustable phase composition through compositional regulation. The hexagonal phase exhibits semimetallic behavior, with a Fermi level positioned higher than that of the semiconductor matrix. This electronic structure difference is consistent with low-barrier interfacial charge transfer and a modulation-doping-like redistribution of electrons across the phase boundaries, contributing to enhanced carrier concentration without severely sacrificing carrier mobility. Moreover, the inherently low thermal conductivity of both phases, combined with enhanced phonon scattering at the interfaces and simultaneous control over grain refinement during phase regulation, effectively suppresses the lattice thermal conductivity. The resulting biphasic structure enables coupled regulation of electronic and thermal transport, synergistically improving thermoelectric performance, achieving a peak thermoelectric figure of merit (zT) of 1.50 at 773 K in Bi0.98Sb0.98Al0.04Se2.8S0.2 under the fixed 2 wt % CuI donor-additive condition. This improvement relative to BiSbSe3 materials demonstrates the effectiveness of phase engineering in decoupling electrical and thermal transport properties. These results highlight interface-engineered semiconductor–semimetal heterostructures as an effective design route for high-performance thermoelectric materials.
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）