APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Yuewen Lu,Jin Chen,Ruihao Wang,Pengfei Xu,Xingquan Zhang,Bing Gao,Changping Guo,Guangcheng Yang
Simultaneous improvement of the safety performance and thermal decomposition properties of ammonium perchlorate (AP) remains a significant challenge. Therefore, based on inspiration from biological materials, we have prepared a novel copper alginate/ammonium perchlorate (Cu-alginate/AP) composite by facile air atomization. The evaluation of the safety performance and thermal decomposition indicates that these properties were significantly improved. In addition, the possible catalytic mechanism of thermal decomposition of AP is proposed herein. It should be noted that Cu-alginate is a three-dimensional network structure and was uniformly coated on the surface and inside of the AP. When the composite is stimulated by external forces, this unique structure plays a buffering role, absorbing energy and greatly improving safety performance. With increasing temperature, the Cu-alginate easily decomposed and renascent Cu-based nanoparticles were generated by in situ growth. These renascent nanoparticles exhibited excellent catalytic activity for the thermal decomposition of AP. As expected, the bio-inspired material can smartly improve both the safety performance and thermal decomposition of AP. Therefore, these findings provide a promising strategy for the development of composite solid propellants.
研究领域:
材料科学
·
推进剂化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 37
·19982-19990
·
IF 8.867
Pei Shi,Shaohua Fang,Jun Huang,Dong Luo,Li Yang,Shin-ichi Hirano
In this work, 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether (F-EPE), a kind of non-flammable hydrofluoroether, was initially mixed with lithium bis(oxalato)borate (LiBOB) and gamma-butyrolactone (GBL) to formulate a safe electrolyte for lithium-ion batteries. It was found that the addition of F-EPE endowed this novel electrolyte with a high safety level, low surface tension and good wettability to the separator and electrodes. More importantly, this safe electrolyte supported the graphite/LiCo1/3Mn1/3Ni1/3O2 full cell in achieving excellent electrochemical performances. During the prolonged cycle test at room temperature, its capacity retention after 500 cycles could reach 80.6%, which was comparable to that of a commercial electrolyte. Its rate performance at room temperature and cycle performance at elevated temperature (60 °C) surpassed those of the commercial electrolyte. In particular, its low-temperature performance was remarkable, and the cell could deliver a capacity as high as 74.2 mA h g−1 at −40 °C. In view of these results, such a safe electrolyte showed tremendous potential for practical application.
研究领域:
材料科学
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能源技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 48
·17383-17394
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IF 7.059
Ping Li,Shen Wang,Shuxue Zhou
Commercial sunscreens suffer from low effectiveness, safety concerns, and feeling uncomfortable on the skin. In this work, by introducing UV filters, i.e., either Fe3+ doped Mg/Al layered double hydroxides (Mg/Al + Fe LDHs), an organic UV absorber, or both of them together, into waterborne cross-linkable polydimethylsiloxane (PDMS) coatings that consisted of vinyl-PDMS emulsion, hydrogen-PDMS emulsion, and Karstedt catalyst capsules, three types of skin sunscreens were facilely fabricated. The new sunscreens can be topically applied to the skin surface and form thick elastic films. The effect of the UV filter content on the UV-vis spectrum, UV-shielding performance, mechanical properties, water vapor transmittance, and adhesion strength of the films was thoroughly investigated. The cross-linked UV-shielding films had a non-greasy surface, moderate adhesion strength to skin, high transparency, a mechanical performance similar to human skin, and high water vapor transmission. All these features made the sunscreens comfortable to use. More importantly, even the sunscreens with a concentration of UV filters as low as 2.08 wt% organic UV absorber and 0.69 wt% Mg/Al + Fe LDHs exhibited the same UV protection performance as those commercial sunscreens with high sun protection factors. Such low UV filter concentrations are beneficial for alleviating safety issues. It is convincing that the cross-linkable PDMS-based sunscreens could be used as next-generation biomimetic sunscreens.
研究领域:
材料科学
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皮肤科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2024
·Vol. 26
·期 9
·1303-1311
·
IF 2.6
Shuyue Miao,Fangbao Jiao,Ying Wang,Qi Zhang,Suming Jing,Hongzhen Li,Xin Zhou
Compared with jagged and rod-like raw products, the spherulitic 3-nitro-1,2,4-triazol-5-one (NTO) crystalline powder is generally superior in the formulation. However, the growth mechanism and corresponding influential factors for NTO spherulites remain to be deeply explored. Herein, the morphological evolutions of NTO crystals in alcohol solvents under a range of maximum supersaturation (Smax) are systematically investigated. It was found that differences in solvent-crystal interface interactions determine the primary morphology of the growing crystals while the magnitude of Smax determines the subsequent polycrystalline evolution. The cooling rate, initial concentration and stirring rate all could affect the crystal morphology by changing the Smax. It is demonstrated that there exists a critical Smax range (1.75–1.88) above which the formation of spherulites is kinetically favorable. Face indexing tests suggest that the (0 0 1) plane of NTO is mostly prone to twinning at low supersaturation, which is because that the molecular layers on the (0 0 1) surface are prone to twisting and the energy difference before and after is only 8.77 kJ mol−1. Then, the interfacial growth theory is employed to explain how a growing crystal plane develops from smooth to rough with non-crystallographic sub-individuals as the crystallization driving force increases. The change of morphology has a positive consequence in improving the safety performance of NTO crystalline powder under drop-weight impact. These findings would forward the understanding of the spherulitic crystallization process for energetic crystals.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Materials Letters
·
2022
·
IF 11.17
Jiaxin Yin,Xiaoqing Huo,Xiaole Cao,Ruonan Li,Yuxuan Zhou,Tao Jiang,Longfei Wang,Zhiyi Wu,Zhong Lin Wang
Conventional electronic combination lockers are usually constructed with an active password input module, which requires the necessary electrical connections. In this work, a new passive smart electronic password locker based on photoelectric signal conversion is reported. When a ZnS-based mechanoluminescent material is subjected to an external force, the mechanical stimulus is converted into light energy. According to this light-emitting property, we developed an optical signal unit as the password input module of the password locker. Benefiting from the mechanoluminescence properties of the ZnS:Cu and randomly distributable visible light sensor, the electronic password locker key has good concealment and randomness. In addition, the surface coating treatment reduces the risk of fingerprint leakage, thus further improving the security performance of the password locker. This work broadens the application path for ZnS-based mechanoluminescence materials, which provides a novel perspective for practical applications such as a smart home.
研究领域:
材料科学
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光电技术
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智能家居技术
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安全工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2022
·
IF 4.889
Song Zhang,Le-wu Zhan,Guang-kai Zhu,Yi-yi Teng,Xin-guang Wu,Jing Hou,Bin-dong Li
Recently, to prepare energetic materials (EMs) with high energy and low sensitivity has attracted much attention in the field of EMs research. However, the safe and efficient manners to prepare such EMs are still limited. In this work, a continuous microfluidic self-assembly method was developed to prepare TATB/HMX composite particles, which has great safety performances (H 50 = 64.6 cm, friction sensitivity = 0 %) and detonation properties (detonation velocity 8375 m/s, ρ = 1.780 g/cm 3 ). The XRD and SEM results show that in-situ generated nano-TATB (mass fraction 10 %) is not only bonded to the surface of HMX, but also embed in the crystal. Furthermore, this method realizes the continuous and stable preparation of TATB/HMX composite particles within 80 min. We anticipate that this work will inspire new perspectives for the preparation of insensitive high-energy explosives.
研究领域:
含能材料
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材料科学
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化学工程
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炸药技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Energy and Sustainability Research
·
2021
·Vol. 2
·期 6
·2000095
·
IF 0
Jun Pan,Nana Wang,Dan Lv,Wujie Dong,Jian Yang,Fuqiang Huang
Sodium-ion batteries (SIBs), as next-generation energy storage devices, can be made by a similar production process to lithium-ion batteries (LIBs). The key to accelerating their commercialization is to discover appropriate high-performance electrode materials with low cost, nontoxicity, and simple synthetic features. Herein, layered-structure Na 2 Ti 3 O 7 , with the advantages of appropriate charge/discharge plateaus, superior stability, environmental friendliness, and ease of preparation using cheap raw materials, is selected for assembly in full-cell battery packs to evaluate its suitability for practical application. When evaluated in a coin cell, it has a capacity of 77.2 mAh g −1 at 1 A g −1 after 10 000 cycles with capacity retention of 99.9%, demonstrating its excellent stability. In the case of a soft-pack battery, it retains 22.3 mAh g −1 at 0.1 A g −1 and 18.1 mAh g −1 at 0.05 A g −1 after 50 cycles. After cycling, there is no sodium dendrite formation or active material shedding, further confirming its safety in practical application. Therefore, Na 2 Ti 3 O 7 as another intercalation/deintercalation mechanism material has application potential in the future.
研究领域:
材料科学
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电化学
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能源存储
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无机化学
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纳米材料
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电池技术
✓ 已验证
DOI
POLYMER COMPOSITES
·
2024
·
IF 4.8
Tao Tang,Junjie Huo,Weijin Li,Chubin Lin,Fuhao Yu,Bibo Wang,Kang Dai
Both the distribution and orientation of 2D graphene nanomaterials in polymer matrices can significantly affect the performance of polymer composites. Still, preparing high-performance graphene polymer nanocomposites with a controlled distribution state is challenging. In this work, magnetically functionalized graphene oxide (MFGO), a ternary nanohybrid, was prepared using a facile method. The resulting MFGO nanofillers were incorporated into unsaturated polyester resin (UPR) with the assistance of an external magnetic field to achieve oriented alignment in the UPR matrix. Attributing to the uniform dispersion as well as the magnetic field-induced orientation of MFGO in UPR, the oriented UPR/MFGO (UPR/OMFGO) nanocomposites demonstrated much-improved mechanical and thermal properties, as the oriented UPR/MFGO2.0 (UPR/OMFGO2.0) achieved a notable increase in tensile strength to 46.71 MPa and storage modulus to 1.24 GPa. Moreover, the peak heat release rate (PHRR) and peak smoke production release (PSPR) of UPR/OMFGO2.0 nanocomposite were reduced by 34.0% and 33.6%, respectively, as compared with the neat UPR. In addition, SEM, FTIR, and Raman spectroscopy were employed to investigate the char residues of UPR samples, and a possible mechanism for the improved fire safety performance of the UPR/OMFGO nanocomposites was proposed. This work provides a promising strategy to design high-performance UPR nanocomposites. Highlights Magnetically functionalized graphene oxide (MFGO) nanohybrids were successfully synthesized. MFGO nanohybrids were well dispersed and orderly arranged in UPR under a magnetic field. The well-oriented MFGO significantly improved the mechanical and thermal properties of UPR. The mechanism for the enhanced fire safety performance of UPR nanocomposites was elaborated.
研究领域:
材料科学
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
Advanced Energy Materials
·
2023
·Vol. 14
·期 3
·2303063
·
IF 27.8
Junhua Zhou,Chi Zhang,Chuan Xie,Huimin Wang,Haining Fan,Yanpeng Guo,Chao Wang,Fan Chen,Yichun Ding,Qiyao Huang,Zijian Zheng
Lithium–sulfur battery (LSB) possesses high theoretical energy density, but its poor cycling stability and safety issues significantly restrict progress in practical applications. Herein, a low-cost and simple Al(OH) 3 -based modification of commercial separator, which renders the battery outstanding fire-retardant and stable cycling, is reported. The modification is carried out by a simple blade coating of an ultrathin composite layer, mainly consisting of Al(OH) 3 nanoparticles and conductive carbon, on the cathode side of the separator. The Al(OH) 3 shows strong chemical absorption ability toward Lewis-based polysulfides and outstanding fire retardance through a self-decomposition mechanism under high heat, while the conductive carbon material acts as a top current collector to prevent dead polysulfide. LSB using the Al(OH) 3 -modified separator shows an extremely low average capacity decade per cycle during 1000 cycles at 2 C (0.029%, 1 C = 1600 mA g −1 ). The pouch cell exhibiting high energy density (426 Wh kg −1 ) can also steadily cycle for more than 100 cycles with high capacity retention (70.2% at 0.1 C). The effectiveness and accessibility of this Al(OH) 3 modification strategy will hasten the practical application progress of LSBs.
研究领域:
电化学储能
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材料科学
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能源化学
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电池技术
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纳米材料应用
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Jun Cheng,Wenjie Lin,Jingrong Hou,Yaqi Liao,Yunhui Huang
As the classic cathode material, lithium cobalt oxide (LiCoO2, LCO) suffers from severe structural and interfacial degradation at voltage >4.5 V, which induces fast capacity decay of the cells. Herein, we adopt a simple and effective method, doping aluminum (Al) cations in precursors, to improve the structural stability of LCO and systematically investigate the effect of Al doping on the electrochemical performances. Doping in precursors rather than bulk particles is beneficial to realize uniform Al ions distribution. Even at 4.5 V charging voltage, the LCO/graphite pouch cells with high Al doping levels (8500 ppm) deliver initial and reversible discharge capacities of 386 and 369 mAh after 500 cycles, respectively. The capacity retention is as high as 95.5%. When the cutoff voltage reaches 4.55 V, the pouch cell maintains 79.0% of the first-cycle discharge capacity after 500 cycles. With optimized electrolyte, the pouch cell realizes 87.3% of the initial discharge capacity after 500 cycles at 45 °C. Moreover, the thermal safety performance of the pouch cells with Al doping is promising. Our work displays an excellent inspiration for developing high-voltage, long-cycle, and safe LCO cathode for commercial lithium-ion batteries.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2013
·
IF 3.479
Ming Xiong,Haolin Tang,Yadong Wang,Mu Pan
With the widely use in portable electronic devices and electric vehicles, the safety of lithium-ion battery has raised serious concerns, in which the thermal stability of separator plays an essential role in preventing thermal runaway reactions. The novelty of this work is to coat commercialized polyethylene (PE) separator and trilayer polypropylene/polyethylene/polypropylene (PP/PE/PP) separator with ethylcellulose (EC), a thermally stable and renewable biomass. The formation of the EC layer with high porosity is through a simple dipping and extracting process. The effects of the EC layer on thermal shrinkage, electrolyte wettability and cell performance are investigated. After coating, the thermal shrinkage of PE separator at shutdown and meltdown point is reduced from 20% to 9% and 42% to 23% respectively, while the drop of OCV under increasing temperature is also postponed from 130 °C to 160 °C. The electrolyte wettability of pristine trilayer PP/PE/PP separator is greatly improved, leading to increased capacity retention from 28% to 99% of the cell.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2025
·
IF 3.1
Ma SongYuChen,Li YinHui,Di Yang,Liu Tao,Wang DeQi,Shi WenJing,Ling ZhiGang,Li FengSheng,Liu Jie
To enhance the safety performance and thermal stability of 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexazepane (CL-20), a core–shell composite was synthesized via in situ polymerization of aniline on polyethyleneimine (PEI)-modified CL-20. PEI modification introduced –NH 2 groups onto CL-20 surface, providing active sites for aniline polymerization and inhibiting its self-polymerization, thus forming dense polyaniline (PANI) shells with uniform thickness (about 2.8 mass%) while maintaining the high-energy crystal structure of CL-20. Compared to pure CL-20, CL-20-P@PANI showed a 15.8 °C increase in phase transition temperature (185.5 °C) and a 4 °C rise in thermal decomposition temperature (247.21 °C), attributed to the thermal barrier effect of PANI shells. The results of the mechanical sensitivity test indicate that the dense polyaniline shell layer effectively dissipates external forces, leading to a 51.43% reduction in impact sensitivity and a 20% decrease in friction sensitivity. This study provides a novel modification approach for high-energy materials by combining PEI-mediated interface engineering with in situ polymerization, ensuring both safety and energy characteristics. Graphic abstract
研究领域:
含能材料
·
材料科学
·
高分子化学
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热工学
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安全工程
✓ 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）