REACTIVE & FUNCTIONAL POLYMERS
·
2025
·
IF 5.1
Xinyi Gao,Zhiyong Li,Xinru Bai,Yuting Dong,Jingjing Meng
There are many concerns associated with high-valued applications of bisphenol A, especially for health and safety issues. Since its widespread use in epoxy resins, related functionalization upgrading has garnered a lot of attention. In particular, its high flammability poses a major risk to property and human safety. To reduce flammability, epoxy monomers, such as 2,2′-(((propane-2,2-diylbis(2-allyl-4,1-phenylene))bis (oxy))bis(methylene))bis(oxirane)(DBAQ) and 2,2′-(((propane-2, 2-diylbis(2, 6-diallyl-4, 1- phenylene))bis(oxy))bis(methylene))bis(oxirane)(DBAW) containing multiple allyls and epoxides have been fabricated and then cured using aromatic amines via a solvent-free process. Therein, structural modification was achieved via a concurrent ring-opening polymerization/olefin polymerization. All these networks displayed good mechanical properties and outstanding thermal stability. Most importantly, all thermosets exhibited excellent flame retardancy displaying a UL-94-V0 rating for combustion. Thus, a green protocol has been established for the generation of halogen- and phosphorus-free functional epoxy resins. It is believed that this approach may provide strong potential for sustainability in practical applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2017
·
IF 2.843
Hong-Bing Chen,Yin-Yong Ao,Dong Liu,Hong-Tao Song,Peng Shen
Novel low-density neutron shielding materials were fabricated by incorporating boron compounds into aerogel via a freeze-drying method. The microstructure was investigated with scanning electron microscopy (SEM). The results revealed a mostly layered structure of both boron-containing aerogels and the control. The aerogel composites have mechanical properties comparable with rigid polyurethane (PU) foam. The obtained composites have a good neutron shielding effect, with shielding efficiency up to 99% (0.283 g/cm2). The neutron shielding efficiency is mainly determined by B content, which is also influenced by the components of the composites. Combustion parameters, including heat release rate (HRR), fire growth rate (FIGRA), total heat release (THR), and total smoke release (TSR), all indicate extremely low fire risk of the neutron shielding materials. The facile fabrication of the low-density boron-containing material makes it promising in neutron shielding applications.
研究领域:
材料科学
·
核工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Yanan Li,Tingting Xiao,Shunchao Ma,Zhanxin Chen,Silin Chen,Yutong Yang,Yu Zhang,Jianli Cao,Yulong Liu,Lina Cong,Haiming Xie
Gel polymer electrolytes (GPEs) have been brought into the spotlight as next-generation electrolytes for batteries in the realm of flexible and wearable electronic devices. However, challenges remain in achieving a trade-off between high safety, high ionic conductivity, and superior mechanical stretchability concurrently. To conquer it, the ionic liquid (1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide; EMIM-TFSI), coupled with the organic fluorinated solvent ( N , N -dimethyl trifluoroacetamide; FDMAC), is proposed for designing a neotype organic-ionogel (OIG) with a rigid-flexible vinylene carbonate (VEC)-butyl acrylate (BA) cross-linked copolymer as the polymer skeleton. By structural optimization and component regulation, the optimal OIG-15 % presents the enhanced ionic conductivity (5.5 × 10 −4 S cm −1 ), non-flammability, and prominent mechanical stretchability, especially sustaining an elongation at break of 427 % and volumetric compressibility exceeding 85 %. Consequently, the Li||Li symmetric cell assembled with OIG-15 % can demonstrate stable cycling for over 2000 h at a current density of 0.1 mA cm −2 , while the Li|OIG-15 %|LiFePO₄ cell can still maintain an exceptional capacity retention of nearly 100 % after 450 cycles at 0.5C. This work provides a valuable construction strategy for the development of high-quality gel electrolyte materials, paving the way for breakthroughs in the widespread application for solid-state polymer lithium metal batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Yunyan Peng,Yuan Liu,Jinyue Dai,Lijun Cao,Xiaoqing Liu
Sustainable and economically feasible treatment on oily sewage is of great significance. Herein, the benzoxazine monomer (C-fa) derived from renewable feedstock was facilely in-situ polymerized on the skeleton of melamine sponge (MS), accompanied with SiO 2 nanoparticles (NPs). Due to the robust hydrophobicity of poly(C-fa) and the as constructed nano-micro hierarchical structure, the as-fabricated porous composite (PBZ-SiO 2 -MS) showed wide applicability in oily sewage remediation, including selective absorption of layered oil/water mixture, separation of surfactant stabilized W/O and O/W emulsion with ultrahigh separation efficiency (higher than 99.9%) and satisfactory permeation flux (1300 L m −2 h −1 ). In addition, the remarkable flame retardancy of polybenzoxazine and MS, as well as its high absorption speed and capacity, endowed PBZ-SiO 2 -MSs with great ability to confine the flame range and prevent the potential explosion when spilled oil is ignited. This easy fabricated, low cost and versatile PBZ-SiO 2 -MSs illustrated an ingenious example of the integration of the high material performance and green chemistry concept.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Li Fang,Wang Sun,Wenshuo Hou,Zhenhua Wang,Kening Sun
Developing high-safety electrolytes is very important to improve the safety and operative temperature of lithium batteries. In this study, a heat-resistant and non-flammable electrolyte is constructed by introducing a functionalized ionic liquid N-methyl-N-methoxyethyl-pyrrolidinium bis(fluorosulfonyl)imide (Pyr 12O1 FSI, IL1) into porous polyurethane (PU) matrix. IL1 contains ether functional group, which can increase the chain flexibility of IL and provide more ion migration channels. Moreover, IL1 shows high compatibility with PU matrix because the intermolecular hydrogen bond is formed by N H groups of PU and ether oxygen of IL1, which is evidenced by Fourier transform infrared spectroscopy (FTIR) tests and density functional theory (DFT) calculations. The binding energy further corroborates the enhanced intermolecular interaction between IL1 and PU. Owing to the superior characteristics of IL1 and synergetic coupling with PU, PU-IL1 electrolyte exhibits good electrochemical performance and endows LiFePO 4 /Li (LFP/Li) battery with a high specific capacity of 135 mA h g −1 and 99% capacity retention after 100 cycles at 0.2C, 30 °C. In addition, the LFP/Li battery with PU-IL1 electrolyte exhibits a high capacity of 134 mA h g −1 (0.5C) and it remains 98% after 100 cycles at a high temperature of 80 °C.
研究领域:
电化学
·
材料科学
·
能源存储
·
高分子化学
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Mingyang Xin,Zhenhua Liu,Yuting Shi,Dan Li,Yanan Li,Xinming Zhang,Xi Chen,Silin Chen,Hao Sun,Haiming Xie,Yulong Liu
Boosting the energy density and safety issue of lithium-ion batteries has become ever more important to satisfy the diverse applications such as energy storage and mobile electronic devices. Herein, we present a new high voltage polyether-based electrolyte (HVPEE) by solvation structure design that can endure high-voltage operations and also possess non-flammable features. Especially, HVPEEs show better compatibility and stability with electrode than conventional electrolyte. We find that the solvent separated ion pair (SSIP) and contact ion pair (CIP) dominate the ion–solvent structure of HVPEEs, rather than the free solvent and ions. In this way, the oxidative decomposition of HVPEE on the cathode interface can be suppressed significantly due to the reduced highest occupied molecular orbital of SSIP complex structure than that of free TFSI - . As a result, the oxidation voltage can achieve as high as 5.35 V when the ether group/Li is optimized at 10/1 in the HVPEE, enabling the LiFePO 4 //Li full cells deliver a capacity of 165 mA h g −1 with a capacity retention of 98 % after 200 cycles. Moreover, when the cut-off voltage is 4.5 V, the discharge capacity of the LiNi 0.6 Mn 0.2 Co 0.2 O 2 //Li full cell can reach 170 mA h g −1 .
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
Small
·
2024
·Vol. 20
·期 35
·2401100
·
IF 13
Xingkai Wang,He Huang,Hong Zhang,Qiujiang Dong,Wanxing Zhang,Meng Gao,Jinyang Li,Biao Chen,Hao Guo,Xiaopeng Han
The increasing need for energy storage devices with high energy density has led to significant interest in Li-metal batteries (LMBs). However, the use of commercial electrolytes in LMBs is problematic due to their flammability, inadequate performance at low temperatures, and tendency to promote the growth of lithium dendrites and other flaws. This study introduces a localized high-concentration electrolyte (LHCE) that addresses these issues by employing non-flammable electrolyte components and incorporating carefully designed additives to enhance flame retardancy and low-temperature performance. By incorporating additives to optimize the electrolyte, it is possible to attain inorganic-dominated solid electrolyte interphases on both the cathode and anode. This achievement results in a uniform deposition of lithium, as well as the suppression of electrolyte decomposition and cathode deterioration. Consequently, this LHCE achieve over 300 stable cycles for both LiNi 0.9 Mn 0.05 Co 0.05 O 2 ||Li cells and LiCoO 2 ||Li cells, as well as 50 cycles for LiNi 0.8 Mn 0.1 Co 0.1 O 2 (NCM811||Li) pouch cells. Furthermore, NCM811||Li cells maintain 84% discharge capacity at −20 °C, in comparison to the capacity at room temperature. The utilization of this electrolyte presents novel perspectives for the safe implementation of LMBs.
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
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Junyan Tang,En Chen,Dehua Wang,Wen Qin,Siyu Fang,Ting Xu,Junjie Liu,Mi Tang,Zhengbang Wang
Construction of polymer-based solid electrolytes with both low flammability and high ionic conductivity for lithium-metal batteries is still a great challenge but highly desirable. Herein, we report on a series of fiber-reinforced poly(ionic liquid) solid electrolytes prepared through an in situ copolymerization of ionic liquid monomers (IL) and poly(ethylene glycol) diacrylate (PEGDA) units with different ratios inside a polyacrylonitrile (PAN) fiber membrane. Such PAN/Poly-IL-PEGDA composite electrolytes demonstrate promising low flammability due to the excellent fire-resistant feature of the employed IL units. Moreover, it is remarkable to see that the optimized PAN/Poly-IL-PEGDA-1 electrolyte also exhibits highly dense structure with low thickness (31 μm), high ionic conductivity (0.32 mS cm–1 at 30 °C), and wide electrochemical window (up to 4.8 V). As a result, both LiFePO4//Li and NCM//Li full cells with such an electrolyte exhibit both excellent rate capability and cycling stability. This study provides a simple strategy for preparing composite polymer electrolytes with low flammability and high conductivity for high-performance lithium–metal batteries.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Kuirong Deng,Suping Zhou,Zelin Xu,Min Xiao,Yuezhong Meng
High-performance polymer electrolytes with the capability to self-heal mechanical damage can effectively enhance reliability, safety and service life of the batteries. Herein, a novel polymer electrolyte (PBPE) with excellent self-healing capacity and high ionic conductivity was developed. PBPE with polymer networks cross-linked by highly reversible imine bonds was fabricated by the Schiff-base reaction between poly(ethylene glycol) diamine and benzene-1,3,5-tricarbaldehyde. PBPE can quickly repair the cut damage spontaneously within 1 h at room temperature and recover its mechanical strength and electrochemical properties. The healed PBPE exhibits almost the same ionic conductivities and mechanical properties as the original PBPE shows. PBPE possesses the highest ionic conductivity (4.79 × 10 −3 S cm −1 at 30 °C) among the self-healing polymer electrolytes. PBPE can promote the generation of LiF-rich SEI and effectively suppress dendrite growth on Li metal anodes. LiFePO 4 (LFP) cells assembled with PBPE exhibit excellent rate capability (discharge capacity of 118.2 mAh g −1 at 5 C rate) and good cycling performance (capacity retention of 97.8% over 125 cycles). More importantly, the healed PBPE can completely recover its properties from damage in LFP cells and enable the cells to possess cycle performance identical to original PBPE.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子化学
·
电池技术
✓ 已验证
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-15
·
IF 15.7
Chen Junjie,He Changxiang,Peng Xudong,Li Jin,Xu Xiaosa,Zhou Yin,Shen Jiadong,Sun Jing,Li Yiju,Zhao Tianshou
Developing safe and high-voltage solid-state polymer electrolytes for high-specific-energy lithium metal batteries holds great promise. However, low ionic conductivity, limited Li + transference number, narrow voltage window, and high flammability greatly hinder their practical applications. Herein, we propose a puzzle-like molecular assembly strategy to construct a solid-state polymer electrolyte via in situ polymerization. The triallyl phosphate and 2,2,3,3,4,4,4-heptafluorobutyl methacrylate segments are spliced into the vinyl ethylene carbonate matrix to enhance anion affinity and promote lithium salt dissociation, resulting in a high ionic conductivity of 0.432 mS cm -1 and a Li + transference number of 0.70 at 25 °C. Meanwhile, the polymer electrolyte exhibits a high oxidation voltage of 5.15 V, enabled by its intrinsic high-voltage tolerance and the formation of a robust inorganic-rich interphase. As a result, the Li||LiNi 0.6 Co 0.2 Mn 0.2 O 2 cell maintains stable performance for 300 cycles and reliably cycles even with an application-oriented mass loading of 15.8 mg cm -2 . The 2.6-Ah Li||LiNi 0.8 Co 0.1 Mn 0.1 O 2 pouch cell reaches a high specific energy of 349 Wh kg -1 . Furthermore, the developed polymer electrolyte displays superior nonflammability and the Li||LiFePO 4 cell exhibits stable cycling for over 120 cycles at 100 °C. Both accelerating rate calorimetry and nail penetration tests verify the high safety of the pouch cells using the designed polymer electrolyte, showing the potential for practical applications.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子化学
·
电池技术
·
安全工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Zhijun Zhang,Peng Zhang,Zhenjie Liu,Binyang Du,Zhangquan Peng
The shuttle effect of polysulfide and the flammability of the conventional electrolyte are the two major obstacles restricting the development progress of lithium–sulfur batteries. Exploring highly efficient electrolyte components coupled with the conventional electrolyte is a reliable strategy to solve these issues. However, the current electrolyte components usually relieve these issues at the expense of the sacrificed electrochemical performance. Herein, a novel zwitterionic ionic liquid named as TLTFSI is reported, which exhibits a high ionic conductivity of 3.7 × 10–3 S cm–1, a wide electrochemical potential window from 1.51 to 4.82 V at 25 °C, and a high thermal decomposition temperature of 275 °C. The optimized TLTFSI-based electrolyte is nonflammable and performs superior electrochemical performance in terms of larger capacity, better rate capability, and longer cyclic life compared with the conventional organic electrolyte. The robust performance is attributed to the high intrinsic ionic conductivity, the suppressed polysulfide dissolution/diffusion, and the high interface compatibility toward the lithium anode of the TLTFSI-based electrolytes. This present work represents the first demonstration of the zwitterionic ionic liquid to efficiently improve the overall electrochemical performance and the safety of lithium–sulfur batteries.
研究领域:
电化学
·
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Xiaoxu Wu,Miao Liu,Zikang Chen,Fang Zhou,Jiahui Chen,Yuming Duan,Zijun Li,Zhi Li
Polymethylsilsesquioxane (PMSQ) aerogels, widely recognized for their exceptional thermal insulation performance, have seen increasing application in fields such as aerospace and energy-efficient buildings. However, the lack of systematic investigation into their pyrolysis and combustion characteristics has hindered comprehensive understanding of their thermal safety. This study aimed to explore the thermal decomposition behavior and flammability of PMSQ aerogels through a combination of thermal analysis and structural characterization techniques. Results showed that PMSQ aerogels were ignited under external heat fluxes of 35 kW/m 2 , 40 kW/m 2 , and 45 kW/m 2 , displaying similar combustion behaviors across all intensities. The flammability was attributed primarily to the presence of methyl groups bonded to the silica framework. Pyrolysis analysis further revealed that chemical degradation of methyl groups preceded the collapse of the silica skeleton, directly impacting the structural stability. Post-combustion characterization confirmed graphitic residue and changes in chemical bonding. These findings provide new insights into the degradation mechanism and combustion risk of PMSQ aerogels, thereby addressing the insufficient understanding of their thermal safety in insulation applications caused by the lack of systematic research on their pyrolysis and combustion behaviors.
研究领域:
材料科学
·
热分析
·
高分子化学
·
消防安全工程
✓ 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）