ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Qiao Xu,Yinsong Si,Rui He,Xiaoming Qi,Xiuping Su,Yaqin Fu
Fast and safe electric heating is highly needed in extreme climates or thermal therapy. Herein, porous activated carbon derived from silk waste is prepared by a simple method. Various porous activated carbons are obtained using different types and concentrations of activator (KOH, KCl, and KHCO3). The effect of the microstructure on the electric heating performance of these carbons is investigated carefully. The type, activator concentration, and carbonization temperature play key roles in the regulation of electric heating properties. The porous carbon activated by 0.05 M KHCO3 at 800 °C demonstrates larger specific surface area (3077 m2 g–1), higher graphitization degree, and lower resistance (2.4 Ω cm), which synergistically contribute greatly to its higher electrothermal efficiency and better electric heating performance. The equilibrium temperature could reach 73 °C in 2 min under a safe voltage of 12 V, proving the better pore-forming capacity and activating function of KHCO3. An electric heating cotton@carbon composite fabric with quite good electric heating property and stability is also prepared, which could reach 38 °C in 2 min under 12 V safe voltage and maintain a temperature 10 °C higher than the ambient temperature even when bent at an angle of 55°. This activated carbon derived from waste protein using a simple and cheap process has great potential in practical applications.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
Advanced Energy Materials
·
2025
·
IF 26
Jia-Xin Guo,Chang Gao,Yun-Fei Du,Feng Jiang,Nai-Lu Shen,Wen-Bo Tang,Xin Shen,Xin-Bing Cheng,Yuping Wu
Solvents in liquid and gel polymer electrolytes are recognized for contributing to high ionic conductivity in high-energy-density lithium metal batteries. However, parasitic reactions involving solvents and lithium metal induce safety risks under thermal abuse conditions and poor lifespan during room-temperature cycles, which are rarely investigated. This study introduces a thermoresponsive mono-solvent electrolyte as a built-in safety switch. The mono-solvent electrolyte polymerizes at elevated temperatures, creating a passivate polymer network without residue solvents. The polymer exhibits high thermal stability with 91% mass retention at 200 °C and significantly suppresses side reactions between lithium metal and the electrolyte, reducing thermal runaway risks. Ah-level Li||LiNi 0.8 Co 0.1 Mn 0.1 O 2 pouch batteries employing this electrolyte can efficiently improve the critical temperature of thermal runaway by 75 °C compared to the thermoresponsive gel polymer electrolyte. At ambient temperatures, the electrolyte promotes the formation of a stable solid electrolyte interphase (SEI) rich in LiF and Li 2 O, effectively reducing side reactions and dendrite growth on the lithium anode. Consequently, Li||LiNi 0.5 Co 0.2 Mn 0.3 O 2 cells retain 91% capacity after 152 cycles, even under high-loading cathodes (19.7 mg cm −2 , 3 mAh cm −2 ). This research offers valuable insights into inhibiting parasitic reactions during the electrochemical cycle and thermal runaway, enhancing the lifespan and safety of high-energy-density batteries.
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
Small
·
2020
·Vol. 16
·期 17
·1905838
·
IF 11.459
Jiaojiao Zhu,Yongtai Xu,Yujun Fu,Dewei Xiao,Yali Li,Lingyang Liu,Yue Wang,Qingnuan Zhang,Junshuai Li,Xingbin Yan
Dual ion batteries (DIBs) have recently attracted ever-increasing attention owing to the potential advantages of low material cost and good environmental friendliness. However, the potential safety hazards, cost, and environmental concerns mainly resulted from the commonly used nonaqueous organic solvents severely hinder the practical application of DIBs. Herein, a hybrid aqueous/nonaqueous water-in-bisalt electrolyte with both broad electrochemical stability window and excellent safety performance is developed. The lithium-based DIB assembled using KS6 graphite and niobium pentoxide as the active materials in the cathode and anode exhibits good comprehensive performance including capacity, cycling stability, rate performance, and medium discharge voltage. Initial capacities of ≈47.6 and 29.6 mAh g −1 retention after 300 cycles can be delivered with a medium discharge voltage of around 2.2 V in the voltage window of 0–3.2 V at the current density of 200 mA g −1 . Good rate performance for the battery can be indicated by 29.7 mAh g −1 discharge capacity retention at 400 mA g −1 . It is noteworthy that the coulombic efficiency of the battery can reach as high as 93.9%, which is comparable to that of the corresponding DIBs using nonaqueous organic electrolytes.
研究领域:
储能
·
电化学
·
电池技术
·
材料科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Manni Li,Zhoujie Zhang,Yuting Yin,Weichang Guo,Yuge Bai,Fan Zhang,Bin Zhao,Fei Shen,Xiaogang Han
A porous polyimide (PI) membrane is successfully prepared via nonsolvent-induced phase separation with two porogens: dibutyl phthalate and glycerin. The as-prepared uniform porous PI membrane shows excellent separator properties for lithium-ion batteries (LIBs). Compared with the commercial polyethylene (PE) separator, the PI separator exhibits significant thermal stability, better ionic conductivity, and wettability both in carbonate and ether electrolytes for LIBs. The battery coin-cells assembled with the PI separator is more robust and still works even after heating at 140 °C for 1 h, while the cells with the commercial PE separator could not charge any more due to the shrinkage of the PE under the same condition.
研究领域:
材料科学
·
储能技术
·
高分子化学
·
电化学
✓ 已验证
DOI
高影响因子
Biomedicines
·
2026
·Vol. 14
·期 7
·1488
·
IF 4.5
Jiayi Li,Xiaoyao Fu,Zhonghuan Qu,Yanjun Yang
Background: Psoriasis is a chronic inflammatory skin disease characterized by abnormal epidermal hyperplasia and immune-inflammatory imbalance. Although celastrol (Cel) exhibits potent anti-inflammatory activity, its strong hydrophobicity and low local delivery efficiency limit its therapeutic application.Methods: To enhance its transdermal delivery and topical therapeutic efficacy, a Cel-loaded liposomal hydrogel microneedle system (Cel-lipo-MNs) was developed in this study. Cel-loaded liposomes were first prepared by the thin-film dispersion method, and Cel-lipo-MNs were subsequently fabricated using a multistep vacuum micromolding process combined with UV-induced photocrosslinking.Results: In vivo studies demonstrated that, in an imiquimod-induced psoriasis-like mouse model, Cel-lipo-MNs markedly alleviated erythema, scaling, and skin thickening, reduced PASI-like scores. Further investigation revealed that Cel-lipo-MNs significantly downregulated the serum levels of IL-17, IL-23, and IFN-γ, and exhibited superior therapeutic efficacy compared with free celastrol, conventional liposomes, and blank microneedles.Conclusions: These findings indicate that Cel-lipo-MNs can substantially enhance the therapeutic effect of celastrol against psoriasis-like skin lesions, possibly through suppression of the IL-23/IL-17 inflammatory axis and related immune-inflammatory responses, and provide a promising transdermal delivery strategy for topical psoriasis treatment.
✓ 已验证
DOI
高影响因子
Nano-Micro Letters
·
2022
·Vol. 14
·期 1
·1-14
·
IF 23.655
Wu Wanbao,Bo Yiyang,Li Deping,Liang Yihong,Zhang Jichuan,Cao Miaomiao,Guo Ruitian,Zhu Zhenye,Ci Lijie,Li Mingyu,Zhang Jiaheng
Highlights
A novel amide-based nonflammable electrolyte is proposed. The formation mechanism and solvation chemistry are investigated by molecular dynamics simulations and density functional theory.
An inorganic/organic-rich solid electrolyte interphase with an abundance of LiF, Li 3 N and Li–N–C is in situ formed, leading to spherical lithium deposition.
The amide-based electrolyte can enable stable cycling performance at room temperature and 60 ℃.
Abstract The formation of lithium dendrites and the safety hazards arising from flammable liquid electrolytes have seriously hindered the development of high-energy-density lithium metal batteries. Herein, an emerging amide-based electrolyte is proposed, containing LiTFSI and butyrolactam in different molar ratios. 1,1,2,2-Tetrafluoroethyl-2,2,3,3-tetrafluoropropylether and fluoroethylene carbonate are introduced into the amide-based electrolyte as counter solvent and additives. The well-designed amide-based electrolyte possesses nonflammability, high ionic conductivity, high thermal stability and electrochemical stability (> 4.7 V). Besides, an inorganic/organic-rich solid electrolyte interphase with an abundance of LiF, Li 3 N and Li–N–C is in situ formed, leading to spherical lithium deposition. The formation mechanism and solvation chemistry of amide-based electrolyte are further investigated by molecular dynamics simulations and density functional theory. When applied in Li metal batteries with LiFePO 4 and LiMn 2 O 4 cathode, the amide-based electrolyte can enable stable cycling performance at room temperature and 60 ℃. This study provides a new insight into the development of amide-based electrolytes for lithium metal batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
THERMOCHIMICA ACTA
·
2022
·
IF 3.378
Yue Pan,Linquan Gong,Jiajia Jiang,Juncheng Jiang
The mixing heat in a semibatch reactor may lead to an increase or decrease of the reaction initial temperature, which has an impact on the safety of the reaction. In this paper, the effect of mixing heat on the safe operating conditions of isoperibolic homogeneous semibatch reactions was studied. Mass and energy balance models considering mixing heat were constructed. Based on the balance models, boundary diagrams and adiabatic temperature diagrams were compared under different mixing heat levels. The mixing heat and reaction heat of esterification reaction between propionic anhydride and sec-butanol were measured by EasyMax. According to the experimental results, the effect of mixing heat on the thermal runaway critical cooling temperature was investigated. The results indicated that the mixing heat had a significant effect on the thermal behavior state of the reaction. The critical criterion considering the mixing heat can more accurately predict the safe reaction operating conditions for the isoperibolic homogeneous semibatch reactions. This work provided helpful suggestions for predicting safe operating conditions of reactions at different mixing heat effect levels.
研究领域:
化学工程
·
反应动力学
·
工艺安全
✓ 已验证
产品关联
DOI
高影响因子
Science China-Materials
·
2023
·Vol. 66
·期 8
·3129-3138
·
IF 8.1
Wang Zhe,Wang Lin,Jiang Wanyuan,Jian Xigao,Hu Fangyuan
The presence of organic electrolytes in typical liquid supercapacitors ultimately results in inadequate safety and poor flexibility, which limits the development and application of supercapacitors. Thus, we developed an easy-to-prepare ion-gel supercapacitor with strong flame-retardant properties, thermal stability, flexibility, and good electrochemical characteristics. Specifically, this ion-gel supercapacitor provides excellent performance by using the in situ cross-linking of ion-gel electrolytes on electrodes. The introduction of ether-containing flexible chain segments to the ion-gel electrolyte results in a high ionic conductivity (6.5 × 10 −3 S cm −1 ) at an ambient temperature, and the in situ cross-linking results in a tight interfacial contact between the electrolyte and electrode. The ion-gel supercapacitor retains a stable electrochemical performance while bending due to the tight interfacial contact and excellent mechanical characteristics. Furthermore, incorporating the diazonaphthone structure in the cross-linked electrolyte renders the ion-gel electrolyte excellent flame-retardant properties and thermal stability, allowing it to sustain dimensional stability at 150°C for 30 min. The supercapacitor with the optimized ion-gel electrolyte has a specific capacity of 105 F g −1 and an energy density of 41.6 W h kg −1 . The results of this study provide a practical method for preparing and optimizing ion-gel cross-linked electrolytes.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Shuang Wang,Li Yang,Wenchao Tong,Qian Yu,Jiexin He,Long Li
The main bottlenecks limiting the practical application of primary explosives are the contradiction between safety and detonation performance, as well as the inherent brittleness of powder charge. Traditional methods to improve sensitivity performance such as adding carbon nanomaterials or embedding metal–organic framework (MOF) structure methods are mostly powders, which are inherently brittle and unsafe. Here, we report three types of typical azide aerogels that can be directly prepared and obtained in this paper by combining electrospinning with aerogel. Their electrostatic sensitivity and flame sensitivity were significantly improved and could be detonated successfully at an initiation voltage of 25 V, demonstrating good ignition performance. This enhancement is primarily due to the porous carbon skeleton structure evolved from a three-dimensional nanofiber aerogel, which has good thermal and electrical conductivity characteristics and can also uniformly load azide particles, contributing to improved explosive system sensitivity. The most important aspect of this method is that it can directly prepare molded explosives, which can be matched with the micro-electrical-mechanical system (MEMS) process, and it offers a new idea for the preparation of high-security molded explosives.
研究领域:
材料科学
·
爆炸化学
✓ 已验证
产品关联
DOI
PubMed
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
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
危险品化学品经营许可证（带存储）