Science Bulletin
·
2018
·
IF 4.136
Funian Mo,Hongfei Li,Zengxia Pei,Guojin Liang,Longtao Ma,Qi Yang,Donghong Wang,Yan Huang,Chunyi Zhi
Thermal runaway has been a long-standing safety issue impeding the development of high-energy-density batteries. Physical safety designs such as employing circuit-breakers and fuses to batteries are limited by small operating voltage windows and no resumption of original working condition when it is cooled down. Here we report a smart thermoresponsive polymer electrolyte that can be incorporated inside batteries to prevent thermal runaway via a fast and reversible sol-gel transition, and successfully combine this smart electrolyte with a rechargeable Zn/ α -MnO 2 battery system. At high temperature, battery operation is inhibited as a result of the increased internal resistance caused by the gelation of liquid electrolyte. After cooling down, the electrolyte is spontaneously reversed to sol state and the electrochemical performance of the battery is restored. More importantly, sol-gel transition enables the smart battery to experience different charge-discharge rates under various temperature levels, providing a smart and active strategy to achieve dynamic and reversible self-protection.
研究领域:
储能技术
·
材料科学
·
电化学
·
智能材料
·
电池安全
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2024
·
IF 5.4
Hao Sun,Zetong Liu,Xiaoyu Sang,Rongxing Li,Pingan Li,Xianluo Hu
Commercial polyolefin separators suffer from inferior electrolyte affinity, low thermal stability, and other serious safety concerns. Ceramic separators are promising alternatives to alleviate these issues, but the fragile structure restricts practical applications. A mechanically robust, high-safety, and flame-retardant composite separator (BHLP) of a hierarchical cross-linked architecture is constructed based on a multibond reinforcement mechanism. The inorganic and organic components of the separator are tightly integrated through electrostatic forces, hydrogen bonds, and chemical bonds. The as-prepared separator exhibits high tensile strength (16.28 MPa), which is approximately 1.7 times that of the PP separator in the transverse direction. Benefiting from the excellent thermal stability and high aspect ratio of hydroxyapatite nanowires, the thermal shrinkage of the BHLP separator is negligible after heating at 200 °C for 1 h and it features with has a highly porous nanostructure, good electrolyte affinity, and high ionic conductivity (0.87 mS cm–1). The LiNi0.8Co0.1Mn0.1O2||graphite full cell with the BHLP separator performs a high specific discharge capacity (184.7 mA h g–1) at 0.1C and outstanding cycling stability with the capacity retention of 93.9% over 100 cycles at room temperature.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
Nature Communications
·
2026
·
IF 18.1
Tang Jimin,Cui Zhuangzhuang,Wei Zhixuan,Zeng Guowei,Wang Chunyu,Wang Zizhun,Zhang Wei,Jiang Heng,Du Fei
The pursuit of high-energy-density lithium metal batteries is often hampered by severe safety hazards and limited cycle life, leading to increased environmental impact and higher costs. Here, we demonstrate that tuning the underappreciated miscibility between electrolyte components could provide an effective approach. By introducing a non-coordinating, non-flammable cyclic fluorinated diluent, we minimize diluent-ion pair intermolecular forces, thereby enabling the formation of isolated solvation nanoclusters. The designed microstructure could facilitate enhanced Li + transport to suppress dendrite growth and foster an inorganic-rich interphase to enhance interfacial electrochemical and thermal stability. This electrolyte design enables 50 μm Li | |2.5 mAh cm −2 LiNi 0.8 Mn 0.1 Co 0.1 O 2 cells to retain 80% capacity after 800 cycles and over 95% capacity following an 8-month calendar aging test. Moreover, the Ah-level pouch cells could achieve a specific energy exceeding 500 Wh kg −1 based on the total mass of the pouch cell, while withstanding fully charged nail penetration and 200% overcharge without fire or swelling. Therefore, the nanocluster electrolyte reduces lifetime safety costs and material consumption per unit energy delivered, collectively enhancing practical sustainability for high-energy-density, safe, and long-lasting lithium metal batteries.
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Feng Lan,Xueting Sun,Renshan Wang,Xiaohui Sun,Xingxing Peng,Hongwei Zang,Jianping Wang
Understanding pyroxasulfone residue dynamics in wheat under China's climatic and soil conditions is critical for establishing rational usage guidelines, setting maximum residue limits, and safeguarding human health. Field trials were conducted across 10 major wheat-producing regions to evaluate the residues of 40 % pyroxasulfone suspensions in winter wheat. A UPLC–MS/MS method was developed to simultaneously quantify pyroxasulfone and four metabolites in grains and straw. The method demonstrated recoveries of 73 %–93 %, with relative standard deviations (RSDs) of 7 %–15 % and a limit of quantification (LOQ) of 0.02 mg/kg. Only the M1 metabolite of pyroxasulfone was detected in straw (0.034–0.18 mg/kg), while residues of all five analytes in grains remained below the LOQ (<0.02 mg/kg). Dietary intake risk assessment confirmed low health concerns. To effectively control annual weeds in wheat fields, a single preemergence soil application of 40 % pyroxasulfone suspension at 180 g a.i./ha is recommended.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Chuanshen Wang,Hongliang Ding,Lu Liu,Hongfei He,Bicheng Lin,Na Sun,Keqing Zhou,Wei Wang,Yuan Hu,Bin Yu
Polymer materials pose significant fire hazards, including rapid heat release and the emission of toxic smoke. Herein, we report a flame-retardant thermoplastic polyurethane (TPU) composite engineered with organophosphonic acid-intercalated high-entropy layered double hydroxides (HE-LDHs), achieving synergistic flame retardancy, smoke suppression, and mechanical enhancement. Meanwhile, tensile strength was enhanced to 38 MPa. The NiCoFeAlZn/DPA/TPU system demonstrated 42.1% reduction in peak heat release rate (pHRR), 48.5% decrease in total smoke release (TSR), and 36.4% decrease in CO production rate compared to pure TPU, attributed to a hierarchical flame-retardant mechanism involving gas-phase dilution, physical barrier formation, and catalytic charring. The synergistic effect of multi-metal components of HE-LDHs and the intercalation (diphenylphosphoric acid, phenylphosphinic acid) agents restructured the thermal decomposition pathway of the material. Early-stage fire warning through HE-LDHs decomposition of interlayer water and organic acid anions releases CO 2 /H 2 O to dilute flammable gases; Intermediate flame inhibition through HE-LDHs catalyze dehydrogenation crosslinking of TPU, capture by PO· radicals from phosphonates, effectively suppressing flame propagation; High-temperature protection through collapse of LDH layers generates metal oxides and phosphorus-carbon hybrid barriers, triggering endothermic phase transitions, with an increase in the amount of residual carbon. This work establishes a theoretical framework for regulating the structure-property relationship of HE-LDHs and pioneers an integrated, active-passive design for fire-safe, high-risk polymer applications.
研究领域:
高分子科学
·
材料工程
·
消防安全工程
·
纳米复合材料
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2025
·
IF 5.1
Lu He,Qing-Qing Bi,Yue Ma,De-Yi Wang
Aiming to improve the flame retardancy efficiency and rheological properties of hydroxides commonly used in asphalt, a combined flame retardant was fabricated using aluminium hydroxide (ATH), halloysite nanotube (HNT) and ferrocene. The optimal loading of flame retardant and process parameters for asphalt preparation were determined through an orthogonal experimental design. Through microscopic observation, the combined flame retardant was evenly dispersed within the asphalt matrix, with minimal agglomeration and segregation. Asphalt containing the combined flame retardant achieved an improved limiting oxygen index (LOI) value of 28.1 %, accompanied by a 30.9 % and 41.2 % reduction in peak of heat release rate (PHRR) and peak of smoke production rate (PSPR) compared to conventional Styrene-Butadiene-Styrene (SBS) modified asphalt used in asphalt pavement. In-depth mechanism analysis revealed that the formation of high-quality charring layers was facilitated by the catalytic reaction of ferrocene and catalytic oxidation of gases produced during asphalt combustion. Moreover, the improved network crosslinking function in asphalt significantly enhanced the rheological properties observed in the dynamic shear rheometer (DSR) and multiple stress creep recovery (MSCR) tests. Prospectively, this study provides an effective approach for simultaneously achieving prominent fire safety and enhanced rheological properties of asphalt through a simple preparation method.
研究领域:
材料科学
·
火灾安全工程
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2023
·Vol. 42
·期 4
·521-531
·
IF 4.3
Liu Cun-Sheng,Hu Jun-Qi,Mao Ting-Ting,Liao Song-Yi,Feng Ru-Ming,Liu Yi-Dong,Min Yong-Gang
Metallic copper is widely used as current collector (CC) for graphite anode of lithium-ion batteries (LIBs) due to its high electrical conductivity and electrochemical stability. However, the large volume density of commercial copper foil (∼8.9 g·cm −3 ) limits the increase of energy density of battery. Here, copper-coated porous polyimide (Cu@PPI) was prepared by vacuum evaporation as collector for the graphite anode. The sandwich structure connects the copper metal on both sides of the collector with excellent electrical conductivity. Compared to commercial Cu foil, Cu@PPI has lighter mass (≤3.9 mg for disc of 12 mm diameter versus 9.9 mg of ∼10 µm Cu foil) and lower volume density (≤3.3 g·cm −3 ). In addition, the porous structure allows of better adhesion of reactive substances and electrochemical properties than pure Cu foils. It is estimated that the energy density of Cu@PPI should be much higher than that of Cu foil. This strategy should be applicable for other current collectors.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
Nature Communications
·
2014
·Vol. 5
·期 1
·1-10
·
IF 10.742
Kou Liang,Huang Tieqi,Zheng Bingna,Han Yi,Zhao Xiaoli,Gopalsamy Karthikeyan,Sun Haiyan,Gao Chao
Yarn supercapacitors have great potential in future portable and wearable electronics because of their tiny volume, flexibility and weavability. However, low-energy density limits their development in the area of wearable high-energy density devices. How to enhance their energy densities while retaining their high-power densities is a critical challenge for yarn supercapacitor development. Here we propose a coaxial wet-spinning assembly approach to continuously spin polyelectrolyte-wrapped graphene/carbon nanotube core-sheath fibres, which are used directly as safe electrodes to assembly two-ply yarn supercapacitors. The yarn supercapacitors using liquid and solid electrolytes show ultra-high capacitances of 269 and 177 mF cm −2 and energy densities of 5.91 and 3.84 μWh cm −2 , respectively. A cloth supercapacitor superior to commercial capacitor is further interwoven from two individual 40-cm-long coaxial fibres. The combination of scalable coaxial wet-spinning technology and excellent performance of yarn supercapacitors paves the way to wearable and safe electronics.
研究领域:
材料科学
·
能源技术
·
纺织工程
✓ 已验证
DOI
高影响因子
Biomaterials Science
·
2019
·Vol. 7
·期 7
·2777-2792
·
IF 5.251
Ziming Lin,Moxyel Bao,Zexuan Yu,Lingjing Xue,Caoyun Ju,Can Zhang
Cationic liposomes have shown great potential in efficient siRNA delivery, and their positive charge is crucial for tight extracellular siRNA binding, effective intracellular siRNA disassembly and physiological toxicity. Thus, the development of novel cationic lipids with a suitable positive charge is desirable for safe and efficient siRNA delivery. Herein, we fabricated a library of 21 tertiary amine-derived cationic lipids (TA) to achieve a balance between effectiveness and safe siRNA delivery. The screened TA13 liposomes, which consisted of TA13 and helper lipid DOPE at a mole ratio of 1 : 1, readily condensed siRNA to form lipoplexes (TA13 LPs), achieving stronger gene silencing in diverse cells than the commercially available vector Lipo2000. Moreover, the TA13 LPs demonstrated effective in vivo gene silencing and good safety in normal mice. The improved gene silencing efficiency of the TA13 LPs is ascribed to their capability of sequentially conquering the barriers met by in vivo siRNA delivery. Notably, the TA13 LPs delivered ApoB-siRNA and obviously decreased ApoB mRNA expression in the liver and the total cholesterol and low-density lipoprotein in the serum of hypercholesterolemia mice, indicating a potential siRNA therapeutic for hypercholesterolemia treatment. It is anticipated that these novel tertiary amine-based liposomes can provide a simple and widely-used platform for the safe and effective delivery of siRNA, and their structure–activity relationships can aid in the further development of effective cationic lipids.
研究领域:
药学
·
分子生物学
·
治疗学
✓ 已验证
DOI
PubMed
高影响因子
Nano Today
·
2026
·
IF 10.7
Yongbo Xia,Tingting Liao,Wang Zhao,Lei Wang,Xiaoru Li,Zepeng Lei,Xiaohui Wang
The electrochemical deposition of metallic lithium, though a promising anode for next-generation high-energy batteries, is challenged by the formation of an unstable solid-electrolyte interphase (SEI), leading to dendrite growth and posing safety risks and limiting life cycles. Traditional strategies such as electrolyte additives offer improvements but struggle under harsh conditions due to insufficient durability of concentration and high flammability. Inspired by sustained drug-delivery systems, we introduce ultrathin (5 μm) cellulosic composite paper separators that enable the controlled release of antimony oxychloride (SbOCl) nano-additives via sustained first-order release kinetics from the intermolecular entanglement within the cellulose fibers. These additives form Li 3 Sb clusters at the anode interface, enhancing SEI stabilization and uniformity of lithium deposition, thereby mitigating dendrite formation. Integrating SbOCl and cellulose effectively suppresses dendrites and improves battery safety through flame-retardant (limiting oxygen index: 39.27%) and thermal stability. The Li anodes with the paper separator achieve over 6000 h of stable cycling in symmetric cells and over 250 cycles in full cells with NCM622 cathodes, realizing an energy density of 368.65 Wh kg⁻¹ (904.90 Wh L⁻¹). Ah-level pouch cells demonstrate robust safety in nail penetration tests, underscoring the potential of this method to advance safe, sustainable, high-energy lithium metal batteries (LMBs) for future wearable applications.
✓ 已验证
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2020
·
IF 7.635
Chuan Liu,Wei Wu,Yongqian Shi,Fuqiang Yang,Minghua Liu,Zhixin Chen,Bin Yu,Yuezhan Feng
Developing highly effective flame retardant polymeric materials with the release of low toxic fumes during burning still keep a huge challenge. In this work, we demonstrated successful synthesis of titanium carbide-reduced graphene oxide (Ti 3 C 2 T x -rGO) hybrid via hydrogen bonding induced assembly of Ti 3 C 2 T x and rGO, which was utilized to improve the thermal and fire safe performances of thermoplastic polyurethane elastomer (TPU). The results indicated that the Ti 3 C 2 T x -rGO hybrid showed a strong adhesion and good compatibility with TPU host. Furthermore, as-prepared Ti 3 C 2 T x -rGO hybrid was homogeneously dispersed in the TPU matrix due to the mutual intercalation of rGO and Ti 3 C 2 T x preventing the re-aggregation. The thermal stability of TPU was dramatically improved after the introduction of Ti 3 C 2 T x -rGO. With addition of 2.0 wt% Ti 3 C 2 T x -rGO, the peak of smoke production rate and total smoke release of TPU nanocomposite were remarkably decreased by 81.2% and 54.0%, respectively. In addition, the TPU/Ti 3 C 2 T x -rGO-2.0 showed distinct reductions in the peak of carbon monoxide production rate (54.1%) and total carbon monoxide yield (46.2%). The physical barrier effect, the catalytic charring of Ti 3 C 2 T x -rGO hybrid and the chemical transformation of Ti 3 C 2 T x were responsible for the excellent fire resistance of TPU/Ti 3 C 2 T x -rGO systems. This work provides a novel strategy to significantly reduce the fire hazards of TPU, thus broadening its industrial applications.
研究领域:
材料科学
·
聚合物工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2020
·
IF 2.87
Ling Chen,Weidong He,Jie Liu
Benefiting from the sol–gel technology and vacuum freeze-drying technology, a novel nanoenergetic composite material nitrated bacterial cellulose (NBC)/CL-20 (hexanitrohexaazaisowurtzitane) has been fabricated. The thermal decomposition kinetic and mechanism have been studied by thermogravimetric analysis–differential scanning calorimetry (TG–DSC) under nonisothermal conditions in a nitrogen atmosphere at multiple heating rates; the process and mechanism of thermal decomposition of NBC/CL-201:1 have also been probed by TG–DSC–IR. The kinetic and thermodynamic parameters, such as activation energy (Ea), per-exponent factor (ln AK), rate constant (k), activation heat (ΔH⧧), activation free energy (ΔG⧧), and activation entropy (ΔS⧧) are calculated. The results indicate that NBC/CL-20 presents much lower activation energy than both of raw NBC and raw NC, and NBC/CL-201:1 exhibits superior thermal performance of heat release and Ea. Moreover, there the existence mechanism has also been probed between NBC and CL-20 during the process of thermal decomposition. The structure and composition have been characterized by a series of characterization methods and indicate that CL-20 has been embedded homogenously in the NBC gel matrix with a prominent porous cross-linked network structure. The impact and friction sensitivities have also been decreased. The whole process effectively avoids high temperatures, and thus ensures operational safety.
研究领域:
材料科学
·
热力学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）