ENERGY & FUELS
·
2025
·
IF 5.3
Di Li,Yanling Wang,Baojun Bai,Ning Xu,Wenjing Shi,Yu Zhang,Wenhui Ding,Peixu Ma,Zan Gao
Dendritic mesoporous silica nanoparticles (DMSNs), characterized by a high specific surface area and abundant hydroxyl groups, offer a promising approach to enhancing the performance of amphiphilic polymers in challenging enhanced oil recovery (EOR) conditions. In this study, DMSNs were successfully synthesized, and systematically evaluated for their impact on the solution properties of a betaine amphiphilic polymer (PADC). The unique “flower-like” mesoporous structure of DMSNs provided approximately 7-fold higher surface area than conventional SiO2, facilitating enhanced polymer–nanoparticle interactions. The DMSN/PADC composite system exhibited significantly improved viscosity, salt resistance, thermal tolerance, and shear resistance compared to PADC and SiO2/PADC systems. Quantum chemical calculations elucidated the interaction mechanisms, highlighting the role of silanol groups in forming electrostatic interactions and hydrogen bonds with PADC, thereby reinforcing the three-dimensional network structure. Enhanced oil recovery (EOR) tests demonstrated a 17.91% tertiary oil recovery using the DMSN/PADC composite system, nearly double that of the SiO2/PADC system (9.48%). This study underscores the potential of DMSNs as a novel additive for optimizing polymer flooding formulations, enabling superior EOR performance in high-temperature, high-salinity reservoirs.
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高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2024
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IF 2.4
He Minqi
The purpose of this study was to prepare amorphous silicon monoxide (SiO) at a low-temperature using a thermoelectric field coupling method. The sample was heated directly by an electric current using silicon (Si) and silicon dioxide (SiO 2 ) as raw materials. Experimental conditions included a stoichiometric mass ratio of raw materials, 10–13 pct conductive graphite doping, an external electric field of 600 V/cm, a current density of 10.57 A/cm 2 , and a furnace temperature range of 300–480 °C in a vacuum environment. A reddish-brown gas condensate with a Si:SiO 2 atomic fraction ratio of 49.86:50.14 was successfully prepared. The real-time voltage measurements divided the process into four stages. Results showed this method prepared amorphous SiO powder at a lower temperature, reducing furnace temperature by nearly 1000 °C compared to traditional methods, which is significant for lowering crucible temperatures in industrial silicon monoxide production.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Zican Zhang,Xiaoying Sun,Jiaqi Wang,Guorong Chen,Liyi Shi
Poly(acrylic acid) (PAA) has been widely studied as a silicon (Si) negative electrode binder, however, its poor adhesion and insufficient ion conductivity have always constrained its practical application in lithium-ion batteries (LIBs). A multifunctional binder was created by the lithiophilic poly(hexaazatrinaphthalene) (PHATN) enhancing PAA via forming physical and chemical crosslinking network (PAA-PHATN), addressing the widespread challenges of active material detachment caused by the irreversible volume expansion and impedance increase caused by low ionic conductivity in Si anode. The -C=N- and -NH 2 groups in PHATN interacted with the carboxyl groups in PAA through hydrogen bonding and amide formation, respectively, resulting in exceptional tensile strength (>2.3 MPa), remarkable ductility (up to 490 % strain tolerance), and high Li + conductivity. When applied in silicon electrodes, PAA-PHATN binders effectively mitigate Si particle pulverization during lithiation, accelerate Li + diffusion (with a diffusion coefficient of D Li + ≈ 2.43 × 10 −9 cm 2 s −1 ), and promote the formation of an inorganic-rich solid-electrolyte interphase (SEI) dominated by LiF. Consequently, the PAA-PHATN-based silicon anode delivers outstanding stability (1587.6 mAh g −1 after 500 cycles at 0.5 A g −1 ) and rate capability (1074.1 mAh g −1 at 5 A g −1 ), outperforming conventional PAA binders. This work highlights an effective strategy of binder design in balancing mechanical strength, adhesion, ion conductivity, and SEI components for Si based anode.
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高影响因子
Small
·
2025
·
IF 12.1
Wanting Yang,Hexiang Di,Suojiang Zhang,Lan Zhang
Anode-free lithium metal batteries (AFLMBs) are attracting significant attention due to their easy fabrication and high volumetric energy density. However, inhomogeneous deposition of lithium usually leads to dead Li or dendrites, in the meantime, the limited active lithium inventory also restricts the cycle life of AFLMB. In this study, a mixed ion/electron conductive interlayer (SNAF) composed of Si nanoparticles, carbon nanotubes (CNT), lithium polyacrylic acid (PAALi), and LiF is designed to stabilize the deposition process of lithium. Of which Si serves as a lipophilic site and reduces the nuclei overpotential, CNT decreases the local current density and thus enhances the high current deposition stability, while PAALi and LiF work as an artificial solid electrolyte interphase (ASEI) and reduce the irreversible active Li loss. It shows that with SNAF interlayer, the thickness of the lithium deposition is close to the theoretical value even up to 10 mAh cm −2 , so as to the stripping process. Moreover, it also enabled the AFLMB to work even under the high current density of 4.29 mA cm −2 . It is believed this facile interlayer strategy can greatly promote the advancement of AFLMB research.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 10
·1-18
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IF 2.8
Huo Dongyu,Wang Qing,Zhu Fuliang,Wang Can,Dai Yile,Dai Jianfeng
Silicon-based anode materials have attracted significant interest due to their high theoretical specific capacity. However, their practical application is severely hindered by the substantial volumetric expansion during cycling. To overcome this limitation, a novel silicon–carbon nanofiber/carbonized Poria powder composite was synthesized via electrospinning followed by a simple heat treatment process. The carbonized Poria powder features a hierarchical porous structure, combining macropores and mesopores. The macropores effectively trap and constrain the silicon–carbon nanofibers, thereby enhancing the structural stability, while the mesopores increase the specific surface area, facilitating improved electrolyte penetration. The composite benefits from the conductive framework of nitrogen-doped carbon fibers and carbonized Poria powder, which collectively enhance its electrochemical performance. At a current density of 0.1 A g −1 , the composite exhibits an initial discharge capacity of 1579.7 mAh g −1 and a charge capacity of 1455.5 mAh g −1 . After 1000 cycles, the discharge capacity is maintained at 1277.2 mAh g −1 , corresponding to a capacity retention rate of 80.8%. Additionally, at a scan rate of 0.5 mV s −1 , the composite demonstrates a high pseudocapacitive contribution of 91.56%, which improves the lithium-ion diffusion rate, reduces cycling-induced stress and side reactions, and mitigates capacity degradation over extended cycling.
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MATERIALS LETTERS
·
2025
·
IF 2.7
Zengmou Li,Xiaoling Liu,Qianwen Wang,Xinyu Jiang,Rui Yan,Keyu Zhang,Yaochun Yao,Shaoze Zhang,Yin Li,Junxian Hu
Serious volume expansion for silicon-based material has extremely restricted its widespread application. Herein, Si@Na 2 SiO 3 composite with grape-liked structure was fabricated by a simple metal salt-assisted chemical etching method, which is enabled by the high corrosivity of NaHCO 3 . The gelatinous Na 2 SiO 3 can evenly coat the surface of Si nanoparticles, then efficiently inhibiting volume expansion. Meanwhile, porous structures etched by NaHCO 3 provide more diffusion channels for Li + . Si@Na 2 SiO 3 exhibits excellent cycling and rate properties: the discharge capacity of 1140.16mAh g −1 at 0.5 A g -1 after 100th cycling and the stable discharge capacity of 1565.64 mAh g −1 at 2.0 A g −1 . This research provides a simple and effective technology to exploit the high-capacity silicon-based anode material.
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JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Wenhui Geng,Xinmeng Hu,Yinhang Zhang,Xinze Li,Qinhua Zhou,Kuikui Xiao,Dong Cai,Shuo Yang,Huagui Nie,Haolin Wang,Zhi Yang
Polyacrylic acid (PAA) based-binders equipped with various functions are paramount importance in suppressing the expansion of silicon (Si)-based anodes. However, PAA molecules tend to slip from the surface of active materials during the expansion of Si-based anode due to their 1D linear structure. In this study, inspired by the strong adhesion mechanism of multiple antennae of Parthenocissus, a new polymer binder based on boronic acid (BA) and dopamine-modified PAA with fast self-healing, strong adhesion and stable mechanical performances is synthesized. Due to the abundant dynamic hydrogen bonds , the binder exhibit fast self-healing function at room temperature , thus guaranteeing the superior cycle stability of the electrode. These dynamic hydrogen bond sites not only endow the binder with strong adhesion but also contribute to an average peeling force of 1.50 N for Si@PDB, significantly higher than that of Si@PAA (0.79 N) and Si@PAB (1.29 N). Consequently, the Si anodes utilizing the rationally designed binder demonstrate excellent cycling stabilities (2538 mAh g −1 after 200 cycles) and rate performances (1973 mAh g −1 at 8.0 A g −1 ). These results suggest that the biomimetic binder can serve as a promising and effective candidate for Si-based anodes towards high-performance lithium-ion batteries.
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高影响因子
Heliyon
·
2024
·
IF 3.4
Xiang Liu,Zhi Yu,Shan Fang,Yong Li,Guoxing Qu,Nai-Gen Zhou,Dong-Liang Peng
Si-based anode materials have a relatively high theoretical specific capacity and low operating voltage, greatly enhancing the energy density of rechargeable lithium-ion batteries (LIBs). However, their practical application is seriously hindered by the instability of active particles and anode electrodes caused by the huge swelling during cycling. How to maintain the stability of the charge transfer network and interface structure of Si particles is full of challenges. To address this issue, we have developed a novel Si@Fe 3 O 4 /AC/CNR anode by in-situ growing one-dimensional high elastic carbon nano-ribbons to wrap Si nanoparticles. This special structure can construct fast channels of electron transport and lithium ion diffusion, and stabilize the surface structure of Si nanoparticles during cycling. With these promising architectural features, the Si@Fe 3 O 4 /AC/CNR composite possesses a high specific capacity of 1279.4 mAh/g at 0.5 A/g, and a superior cycling life with 80 % capacity retention after 700 cycles. Even at a high current density of 20.0 A/g, the composite still delivers a capacity of 621.2 mAh/g. The facile synthetic approach and high performance of Si@Fe 3 O 4 /AC/CNR anodes provide practical insight into advanced anode materials with large volume expansion for high-energy-density LIBs.
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高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Chengjia Dan,Yue Wang,Daikuan Huang,Yang Cao,Dabin Zhang
Leakages of electrolytic manganese slag (EMS) disposal sites pose a significant threat to soil and groundwater, necessitating effective in situ remediation technologies. This study presents a multi-scale analysis to elucidate the enhanced impermeability mechanism of EMS composite modified by sodium polyacrylate (PAAS). By integrating macroscopic performance testing (compressive strength, permeability, corrosion resistance, and pollutant leaching), molecular dynamics (MD) simulations, and advanced spectroscopic/microscopic techniques (FTIR, XPS, and EDS mapping), we establish a direct link between macroscopic properties and underlying molecular-level interactions. Results demonstrate that an optimal PAAS/EMS mass ratio of 0.2 significantly enhances compressive strength (12.3-fold increase), reaching 2.78 MPa, and reduces the permeability coefficient to 1.318 × 10 −8 cm/s, with leachate concentrations meeting relevant water quality standards. This performance improvement stems from a synergistic multi-scale effect: macroscopically, well-dispersed PAAS forms a crosslinked network, filling structural defects within the EMR matrix and encapsulating the CaSO 4 ·2 H 2 O hard phase; at the molecular level, MD simulations reveal that PAAS chains undergo ion exchange (Na + with Mn 2+ ) and chelation (between -COO - and Mn 2+ ), forming a multi-crosslinked polymer network that densifies the microstructure and effectively impedes contaminant migration. FTIR and XPS analyses corroborate these molecular interactions, confirming that the enhanced impermeability arises from the synergistic effects of polymerization, ion exchange, and chelation. This study provides a new approach for controlling environmental risks associated with EMS, demonstrating the efficacy of multi-scale analysis in optimizing material performance.
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Journal of Energy Storage
·
2025
·
IF 9.8
Susu Chen,Mengjun Li,Liyang Lin,Zhen Wei,Ning Hu
Silicon's potential as a lithium-ion battery anode material is greatly constrained by its pronounced volume changes during cycling and inherently poor electrical conductivity. Although strategies like nanosizing silicon particles and applying carbon coatings offer partial improvements, fundamental issues including particle agglomeration and structural degradation during operation remain unresolved. In this study, leveraging the synergistic interplay between gelatin (GE) and sodium alginate (SA), we engineered a nitrogen-doped Si@rGO@GS via a seamlessly integrated route of liquid-phase synthesis, electrostatic self-assembly, freeze-drying, and thermal annealing. Silicon nanoparticles (Si NPs) were uniformly embedded within a hierarchically porous, three-dimensional nitrogen-doped carbon framework. The Si@rGO@GS composite electrode demonstrated superior electrochemical performance: achieving a maximum specific capacity of 1851 mAh g −1 at 0.1 A g −1 and maintaining 423 mAh g −1 even at a high current density of 2 A g −1 . Additionally, after 100 cycles at 1 A g −1 , the composite retained a reversible capacity of 548 mAh g −1 with an impressive capacity retention rate of 78.8 %. The cooperative interaction between rGO and biomass-derived carbon suppressed particle agglomeration and stabilized the carbon‑silicon interface, positioning the composite as a highly promising anode for lithium-ion batteries.
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高影响因子
FUEL
·
2025
·
IF 7.5
Qinghui Yan,Min Wu,Huafeng Zhou,Haoshen Huang,Zhengfei Chen,Haiyong He,Zixuan Liu
Lithium-air batteries (LABs) are highly attractive for their highest energy density among all energy storage systems, but the high reactivity and volumetric variation of lithium metal anode (LMA), as well as the inter-electrode crosstalk (shuttling) by soluble species, e.g. redox mediators (RMs), impose arduous challenges for their practicality. Traditional countermeasures such as LMA protecting structures and solid-state electrolytes (SSEs) increase heft, complexity and cost, diminishing LAB’s core advantage—the ultrahigh energy density. In this work, a high-capacity (1750 mAh g -1 SCC ) silicon-carbon composite (SCC) material was synthesized and used as the anode in a Li-ion air battery, exhibiting superior cyclability (86 cycles under 300 mAh g -1 carbon ) compared to that with LMA (61 cycles), and physical characterizations revealed no deposition of RM on the SCC anode despite the absence of SSEs to prevent shuttling, demonstrating their excellent compatibility. This work showcases the prospects of silicon-based anodes to address LABs’ anode stability issue and improve cell cyclability while retaining most of the energy density.
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高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Xiaomei Chen,Yuefeng Wu,Yanpeng Wang,Zezhong Li,Yusheng Luo,Yongcheng Jin,Xiaolin Che,Wei Liu
Silicon anodes hold great promise for high-energy lithium-ion batteries but suffer from severe volume expansion and unstable solid electrolyte interphase (SEI) formation. To address these challenges, this study develops a thermally crosslinked dual-polymer (KH550/sodium alginate) coating strategy. The 350 °C-pyrolyzed coating forms a semi-carbonized artificial SEI on the surface of Si particles that effectively suppresses side reactions and accommodates volume changes. Comparing with uncarbonized polymer coating, the denser semi-carbonized one demonstrates its unique effect in matching Li⁺ diffusion kinetics between the interface and bulk silicon, retaining the structural integrity of Si particles during lithiation. The resulting Si anode exhibits minimal volume expansion (8%), 82.5% initial Coulombic efficiency, 948 mAh g⁻¹ after 500 cycles at 2 A g⁻¹, thereby developing a new gate on enhancing electrochemical performance by pre-constructing semi-carbonized polymer coating around Si particles.
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