ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yang He,Feng Zhou,Yingxi Zhang,Tuan Lv,Paul K. Chu,Kaifu Huo
Silicon (Si) is a promising anode material for next-generation lithium-ion batteries (LIBs), but the huge volume change of Si particles causes anode fracture and delamination from the current collector, thereby stifling practical implementation. Herein, a high-toughness and hierarchical stress-dissipating binder for Si anodes is prepared by the covalent and hydrogen bonding of poly(acrylic acid) (PAA) and a cross-linked polyurethane (CPU). The physicochemical dual-cross-linked CPU-PAA binder with high toughness, large tensile strength, and hierarchical stress dissipation improves the structural integrity of Si anodes and minimizes thickness swelling. Finite element analysis confirms that the CPU-PAA binder reduces and uniformizes the stress distribution within the Si anodes during cycling. As a result, the Si/CPU-PAA anode shows a high capacity retention of 82.3% after 150 cycles at a high current density of 5 A g–1. Moreover, the Si/CPU-PAA//LiNi0.5Co0.2Mn0.3O2 full cell delivers stable cycling performance, highlighting the great potential of the CPU-PAA binder in high-energy-density LIBs. This work provides insights into the design of high-strength, large-toughness, and efficient stress-dissipating binders for high-performance Si anodes.
研究领域:
材料科学
·
电池技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCRIPTA MATERIALIA
·
2014
·
IF 2.968
Ben Ma,Bo Chi,Jian Pu,Jian Li
The morphology of domain structure in LaNbO 4 added to YSZ–NiO composite was examined using a focused ion beam prepared specimen in a transmission electron microscope with a straining stage. It is confirmed for the first time that the morphology is changed under load through domain boundary movement. The driving force for this domain switch is the difference in Gibbs free energy between domains with different crystallographic orientations. This domain switch improves toughness by dissipating stress build-up at the crack tips.
研究领域:
材料科学
·
晶体学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Ziqiao Yan,Xiujuan Wei,Wenwei Zhang,Lin Xu,Jie Zhang,Shuxing Wu,Kai-Hang Ye,Zeheng Li,Zhan Lin,Jun Lu
The rapid capacity decay of microsized SiO x anode resulting from large volume change hinders its commercial application. Herein, a polymer binder with strong interfacial adhesion and high stress dissipation is designed to alleviate the volume change of microsized SiO x anode and maintain structural integrity of electrode. The density functional theory calculations (DFT) and X-ray photoelectron spectroscopy (XPS) reveal that the multifunctional polymeric network enhances interfacial contact between the binder and silicon oxide (SiO x ) particles through gradient hydrogen bonds. Additionally, the designed binder exhibits high mechanical strength and self-healing function via the synergy of supramolecular and covalent chemistry. The designed binder enables SiO x electrodes to exhibit notable cycling stability and superior rate performances. This work provides valuable insights into the structure-function relationship of binder for high-capacity SiO x anodes.
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 Materiomics
·
2022
·
IF 8.589
Zhong Xu,Xiang Chu,Keli Wang,Haitao Zhang,Zhongqian He,Yanting Xie,Weiqing Yang
Silicon-based anodes with high theoretical capacity have intriguing potential applications for high energy density lithium-ion batteries (LIBs), while suffer from immense volumetric change and brittle solid-state electrolyte interface that causes collapse of electrodes. Here, a stress-dissipated conductive polymer binder (polyaniline with citric acid, PC) is developed to enhance the mechanical electrochemical performance between Si nanoparticles (SiNPs) and binders. Benefiting from the stable triangle network node of citric acid and a considerable distributed of hydroxyl groups, the PC binder can effectively dissipate the stress from SiNPs, thus providing an excellent cyclic stability of Si anodes. Both experimental results and theoretical calculation demonstrate the enhanced adhesion between binders and SiNPs could bond the particles tightly to form a robust electrode. The as-fabricated Si anode exhibits outstanding structural stability upon long-term cycles that exhibit a highly reversible capability of 1 021 mA·h·g −1 over 500 cycles at a current density of 0.5 C (1 C = 4 200 mA·g −1 ). Evidently, this stress-dissipated binder design will provide a promising route to achieve long-life Si-based LIBs.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
POLYMER COMPOSITES
·
2025
·
IF 4.7
Long Ma,Zhen Deng,Gang Li,Yunhua Yu,Xiaoping Yang
Simultaneous enhancement of interfacial toughness and strength in carbon fiber reinforced polymer matrix composites (CFPRs) is critical for achieving superior mechanical performance and long-term durability. Herein, a multi-aldehyde polyrotaxane (maPR) was synthesized and incorporated into the CFRP interphase at varying branched polyethyleneimine (PEI)/maPR ratios to construct a molecular pulley network. The 2:1 PEI/maPR formulation (PEI 2 -PR 1 ) generated an optimal molecular pulley network within the interphase of CFRP, which enhanced stress dissipation capacity while increasing interphase thickness and crosslinking density. Compared to the desized carbon fiber (CF-desized), the PEI 2 -PR 1 -modified carbon fibers (CF-(PEI 2 -PR 1 )) demonstrated significantly increased surface roughness and wettability. Consequently, the CF-(PEI 2 -PR 1 )/EP composite exhibited the widest interphase (402 ± 8 nm), the highest transverse fiber bundle test (TFBT) strength (24.80 ± 2.21 MPa), interfacial shear strength (IFSS) (72.17 ± 2.99 MPa), and interfacial toughness (194.13 ± 2.43 J/m 2 ), along with the optimal release of residual interfacial stress (82.10%). This work proposed a novel and effective approach for simultaneously enhancing the interfacial toughness and strength of CFRP through molecular-scale interphase engineering. Graphical Constructing a molecular pulley network interphase for simultaneous enhancement of the interfacial toughness and strength in carbon fiber/epoxy composites.
研究领域:
材料科学
·
聚合物复合材料
·
表面工程
·
纳米技术
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Jiahao Chen,Yaxin Li,Xinyuan Wu,Huihua Min,Jin Wang,Xiaomin Liu,Hui Yang
The structure instability and cycling decay of silicon (Si) anode triggered by stress buildup hinder its practical application to next-generation high-energy–density lithium-ion batteries (LIBs). Herein, a cross-linking polymeric network as a self-healing binder for Si anode is developed by in situ polymerization of tannic acid (TA) and polyacrylic acid (PAA) binder labelled as TA-c-PAA. The branched TA as a physical cross-linker complexes with PAA main chains through abundant dynamic hydrogen bonds, endowing the cross-linking TA-c-PAA binder with unique self-healing property and strong adhesion for Si anode. Benefiting from the mechanical robust and hard adhesion, the Si@TA-c-PAA electrode exhibits high reversible specific capacities (3250 mAh/g at 0.05C (1C = 4000 mA g −1 )), excellent rate capability (1599 mAh/g at 2C), and impressive cycling stability (1742 mAh/g at 0.25C after 450 cycles). After Ex situ morphology characterization, in situ swelling analysis, and finite element simulation, it is found that the TA-c-PAA binder allows the Si anode to dissipate stress and prevent pulverization during lithiation and delithiation, thus the hydrogen bonds among interpenetrating network may be adaptable to the stress intensity. Our work paves a new avenue for the design of efficient and cost-effective binders for next-generation Si anode in LIBs.
研究领域:
材料科学
·
能源存储
·
化学
·
电池技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-10
·
IF 14.7
Wang Hongxing,Cheng Longdi,Yu Jianyong,Si Yang,Ding Bin
Ceramic aerogels are often used when thermal insulation materials are desired; however, they are still plagued by poor mechanical stability under thermal shock. Here, inspired by the dactyl clubs of mantis shrimp found in nature, which form by directed assembly into hierarchical, chiral and Bouligand (twisted plywood) structure exhibiting superior mechanical properties, we present a compositional and structural engineering strategy to develop strong, superelastic and fatigue resistance ceramic aerogels with chiral fibers array resembling Bouligand architecture. Benefiting from the stress dissipation, crack torsion and mechanical reinforcement of micro-/nano-scale Bouligand array, the tensile strength of these aerogels (170.38 MPa) is between one and two orders of magnitude greater than that of state-of-the-art nanofibrous aerogels. In addition, the developed aerogels feature low density and thermal conductivity, good compressive properties with rapid recovery from 80 % strain, and thermal stability up to 1200 °C, making them ideal for thermal insulation applications.
研究领域:
材料科学
·
机械工程
·
纳米技术
·
仿生学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Guangmeng Chen,Ming Mu,Wenjie Yu,Li Jia,Ziqiang Hu,Weiwei Zhao,Xiaoqing Liu
Flexible sensors in practical applications require them to show sufficiently high sensitivity over wide sensing ranges, however, there always exists a trade-off. Herein, we address the aforementioned challenging through the geometric innovation of laser-induced graphene (LIG) conductive paths. A liquid benzoxazine (PGE-fa) precursor is developed to enable the in-situ LIG fabrication on PDMS substrates, eliminating the conventional transfer-induced defects. Furthermore, a dual architecture integrating straight and serpentine LIG patterns in parallel synergistically resolves the sensitivity-range paradox, where the straight segments bear high sensitivity (GF = 68.98 at 1% strain) for micro-strain detection (0.05–10%), while the serpentine components maintain conductivity for large-strain tolerance (up to 30%). It is revealed that the cracks appear in straight LIG line under small deformations, resulting in resistance change to guarantee high sensitivity, whereas the serpentine LIG line can dissipate stress through in-plane bending and rotational deformation, and therefore, contribute to the conductive path to accommodate broad strain range. In addition, the sensor exhibits exceptional performance of rapid response/recovery (180/200 ms), ultralow detection limit (0.05% strain), and 5,000-cycle durability. Experimental validations in pulse waveform analysis, blink detection, joint motion monitoring, and Morse code-based human-machine communication collectively demonstrate the sensor's versatility across diverse physiological and biomechanical sensing scenarios. It is believed that the intelligent structural design in this work is attractive for the development of high-performance wearable systems in personalized healthcare.
研究领域:
材料科学
·
纳米技术
·
传感器技术
·
生物医学工程
·
柔性电子学
·
人机交互
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）