Metals
·
2019
·Vol. 9
·期 2
·170
·
IF 2.259
Limei Ren,Tengchao Wang,Zhaoxiang Chen,Yunyu Li,Lihe Qian
A self-lubricating plasma electrolytic oxidation–polytetrafluoroethylene (PEO–PTFE) composite coating was successfully fabricated on the surface of commercially pure titanium by a multiple-step method of plasma electrolytic oxidation, dipping and sintering treatment. The microstructure and tribological properties of the PEO–PTFE composite coating were investigated and compared with the PEO TiO2coating and the PTFE coating on titanium. Results show that most of the micro-pores of the PEO TiO2coating were filled by PTFE and the surface roughness of PEO–PTFE composite coating was lower than that of the PEO TiO2coating. Furthermore, the PEO–PTFE composite coating shows excellent tribological properties with low friction coefficient and low wear rate. This study provides an insight for guiding the design of self-lubricating and wear-resistant PEO composite coatings.
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DOI
高影响因子
IONICS
·
2024
·Vol. 30
·期 7
·3915-3924
·
IF 2.4
Guo Bing,Wang Qiuyue,Wang Zhixing,Meng Wu,Wang Jiexi,Duan Hui,Li Xinhai,Peng Wenjie,Yan Guochun,Guo Huajun
All-solid-state lithium batteries (ASSLBs) are regarded as the most promising alternative to traditional liquid lithium-ion batteries due to their high-energy density and excellent safety. As an important part of ASSLBs, composite polymer electrolytes (CPEs) with excellent comprehensive performance have attracted wide attention from researchers. Herein, a series of CPEs were prepared by employing Li 6.4 Ga 0.2 La 3 Zr 2 O 12 (LGLZO) submicron particles with cubic phase as fillers in polyethylene oxide (PEO) matrix. The tape-casting method was employed to prepare PEO-LiTFSI-x% LGLZO (CPE-x, where x = 0–80). In these CPE-x, the CPE-40 exhibits elevated ionic conductivity (6.20 × 10 −5 S cm −1 at 20 °C and 1.88 × 10 −4 S cm −1 at 60 °C), attractive Li + transference number (0.31 at 60 °C), low activation energy barrier of lithium-ion migration, wide electrochemical window, and high critical current density of 1.3 mA cm −2 . Furthermore, the LiFePO 4 | CPE-40 | Li batteries deliver outstanding cycle performance (capacity retention of 85.43% after 225 cycles at 0.2C and 60 °C) and rate performance. These results show that the PEO-base solid-state electrolytes filled with submicron LGLZO particles possess a broad application prospect.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Wenji Zheng,Rui Ding,Ziheng Li,Xuehua Ruan,Yan Dai,Miao Yu,Xiangcun Li,Xiaoming Yan,Xiaobin Jiang,Xiujuan Zhang,Gaohong He
The hollow filler has been verified to effectively enhance the CO 2 permeability of mixed matrix membrane (MMMs) by constructing low-resistance transport pathway. However, the in-continuity of hollow fillers across the membrane results in insufficient CO 2 permeability. In this work, the micron-sized hollow ZIF-8 (Mic-H-ZIF-8) were designed and proposed to accumulate continuously across the membrane to construct the transport highway for CO 2 . Importantly, the in-situ polymerization was utilized to achieve continuous accumulation of the Mic-H-ZIF-8 fillers across the membrane. The Mic-H-ZIF-8 presents cavity size of 4 μm and shell thickness of 100 nm, and three or four Mic-H-ZIF-8 microspheres are aligned sequentially across the membrane, in which the effective gas transport distance is decreased from 13 μm to the range of 0.8–3 μm. Consequently, the CO 2 permeability of 5 wt% Mic-H-ZIF-8/PEO MMM is 224.6 % and 63.5 % higher than those of pure PEO membrane and nanosized hollow ZIF-8/PEO MMM at 0.1 MPa. Meanwhile, the CO 2 /N 2 selectivity is still as high as 70.0. This CO 2 separation performance is far exceeding the Robeson upper bound in 2008, and beyond the McKeown upper bound in 2019 as the feed pressure increasing, confirming the significance of continuous transport highway constructed by micron-sized hollow MOFs on improving CO 2 separation of MMMs.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Xiaoyu Yang,Yanxia Liu,Dezhao Li,Jiayu Dong,Fengtao Chai,Baoyu Yang,Muhao Liu,Shuang Wang
PEO based solid electrolyte has high crystallinity, which seriously hinder the transport of lithium ions at room temperature, resulting in low ionic conductivity. In this paper, a high performance composite solid electrolyte membrane with LLZO@ZiF-67 as an inorganic filler and PEO as matrix was synthesized. The LLZO@ZiF-67 inorganic filler, which covered by in-situ synthesis of ZiF-67 layer on surface of LLZO, show a large specific surface area and a polyhedral structure. The introduction of LLZO@ZiF-67 effectively reduce the crystallinity of PEO, providing a continuous channel for the transport of lithium ions, which result in a ionic conductivity as high as 1 . 09 × 1 0 − 4 S cm −1 at room temperature of the composite electrolyte PLZ-20. Furthermore, the electrochemical stability and interface compatibility to lithium metal are improved. The lithium stripping/plating process at 0.1 mA cm −2 can maintain stable for more than 600 h without short circuit. In addition, the initial discharge capacity of the full battery (Li / PLZ-20 / LFP) can reach up to 141.1 mA h g −1 with retention of 91.45% after 100 cycles, which provide possibility for the application of high performance solid state battery.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·Vol. 19
·期 46
·2305326
·
IF 13.3
Shida Xue,Shiming Chen,Yanda Fu,Hengyao Zhu,Yuchen Ji,Yongli Song,Feng Pan,Luyi Yang
Composite solid electrolytes (CSEs) consisting of polyethylene oxide (PEO) matrix and active inorganic fillers have shown great potential for practical applications. However, mechanisms of how different active fillers enhance ion transport in CSEs still remain inconclusive. In this work, the component dependencies of ionic conductivity of PEO-based CSEs are investigated by comparing two widely investigated active fillers: NASICON-type (LATP) and garnet-type (LLZTO). In terms of ionic conductivity, the optimum ratios are strikingly different for LLZTO (10 wt%) and LATP (50 wt%). Through experimental and computational studies, it is demonstrated that the high affinity between LATP and PEO facilitates unhindered interfacial Li + transfer so that LATP functions as a bulk-active filler to provide additional inorganic ion pathways. By contrast, Li + transfer between LLZTO and PEO is found to be sluggish. Instead, LLZTO mainly improves ionic conductivity by dissociating lithium salt, making it a surface-active filler. Through categorizing active fillers based on their Li + conductive mechanisms, this work provides new understanding and guidelines for componential design and optimization of solid composite electrolytes.
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
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Yu-Jie Sun,Shuo Li,Yang-Yang Zhao,Wei-Yao Han,Ming-Jie Yin,Quan-Fu An
Photopolymerization of acrylated poly(ethylene glycol) prepolymers is a facile method for high-efficiency carbon capture membrane fabrication. However, the oxygen intolerance of the free radical reaction demands oxygen-free condition for membrane fabrication, which hampers the potential scale-up membrane manufacture. In this work, a brand new method, called thiol-olefin click reaction coupled high-viscosity solution, was proposed for in-air preparation of crosslinked polyethylene oxides (PEO) membranes. The thiol-olefin click reaction plays the role of consuming the oxygen molecules and high-viscosity solution functions as a barrier to hinder oxygen diffusion. Collaboratively, the active oxygen content can be significantly diminished, rendering the smooth reaction for crosslinked PEO membrane preparation. After optimizing the component of the casting solution, i.e., tailoring the membrane microstructure, the optimal PEO membrane offers a CO 2 permeability of 550 Barrer, with a CO 2 /N 2 selectivity of 52. Moreover, the membrane can stably run for 120 h. Thus, our study provides an innovative approach for convinient and rapid construction of high-performance crosslinked PEO membranes in air.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2025
·
IF 5.3
Xin Jiang,Xue-Tong Hu,Yi-Wei Fan,Ting-Ting Chen,Kun-Rong Lu,Peng-Fei Wang,Yu-Han Wu,Fa-Nian Shi,Yu-Hang Zhang
The poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) is expected to prepare electrolytes with wide electrochemical window owing to its excellent antioxidant capability. However, the inert lithium ion conduction of the C–C skeleton severely limits its electrochemical application. In this work, high-voltage-resistant sulfolane (SL) is used as a plasticizer into the PVDF-HFP skeleton to prepare gel electrolytes. Moreover, to alleviate the incompatibility of SL with lithium metal by the strong dipole–dipole interaction between poly(ethylene oxide) (PEO) and SL, a plasticized PVDF-HFP/PEO gel polymer electrolyte (PPS-GPE) was achieved, which exhibits a high ionic conductivity of 1.67 × 10–4 S cm–1 and an electrochemical stability window of 4.8 V. The assembled Li||LiCoO2 cells show a high average discharge capacity of 153 mA h g–1 between 3.0 and 4.4 V, with a retention of 77% within 400 cycles at 0.2 C. This work provides a new strategy for the development of high-voltage, high energy density, and high safety 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
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Jun Cheng,Guangmei Hou,Qiong Chen,Deping Li,Kaikai Li,Qunhui Yuan,Jiajun Wang,Lijie Ci
Polyoxyethylene (PEO)-based electrolyte is one of the most promising solid-state electrolyte (SSE) candidates for all-solid-state batteries due to its high flexible and salt solubility. Recently, morphological control on active fillers is confirmed as a critical issue affecting the performance of SSE. However, the lack of comprehensive research is hindering the understanding over the growth mechanism of the structured active fillers. Especially, compared with other dimensions, the studies on the growth mechanism of two-dimensional (2D) active fillers are quite limited due to the difficulties in physical methods such as exfoliation. Herein, sheet-like LLZAO (Li 6.25 La 3 Zr 2 Al 0.25 O 12 ) (SL) is synthesized by bottom-up method to upgrade PEO matrix (SL@PEO). In addition, the growth mechanism of SL is proposed, which provides a new sight for morphology control over inorganic solid electrolytes. The SL structure provides continuous interfaces between the fillers and the polymer matrix, which ensures rapid diffusion of lithium ions. In addition, the SL can provide more nature barriers for electrolyte to suppress the lithium dendrites growth. The lithium symmetric cells adopting SL@PEO present prolonged cycling stability and higher critical current density compared with the control samples. The assembled all-solid-state LiFePO 4 /SL@PEO/Li batteries exhibit superior cycling stability and rate capability.
研究领域:
材料科学
·
储能
·
电化学
·
纳米材料
✓ 已验证
DOI
高影响因子
Polymers
·
2018
·Vol. 10
·期 7
·747
·
IF 2.935
Jiao Ding,Man Chen,Wenjie Chen,Ming He,Xiangyang Zhou,Guoqiang Yin
Herein, we demonstrate a three-component FK/PVA/PEO nanofiber membrane by electrospinning and vapor-assisted crosslinking. We have used feather-derived-keratin (FK), poly (vinyl alcohol) (PVA), and poly (ethylene oxide) (PEO) as membrane components and citric acid/glyoxal as the crosslinker. The structural, thermal, hydrophobicity, and mechanical properties of the as-prepared and crosslinked FK/PVA/PEO nanofiber membranes have been systematically investigated. The results suggest that the nanofiber membrane’s vapor-assisted crosslinking by citric acid has shown better performances than that of glyoxal used as a crosslinker. These results exhibit that non-toxic citric acid can be used as a crosslinking agent to modify the performance of keratin-based membranes. This study opens up further avenues for post-synthesis modification of polymeric membranes for a wide range of applications.
研究领域:
材料科学
·
高分子化学
·
纳米技术
·
膜技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2014
·
IF 2.083
Yujing Li,Liqiang Wan,Farong Huang,Lei Du
An amphiphilic OAPS–PEO was synthesized by “click” reaction between octa(azidopropyl) POSS (OAPS) and propargyl-terminated PEO . The structure of OAPS–PEO was characterized by nuclear magnetic resonance (NMR). The amphiphilic properties and aggregation process of OAPS–PEO in aqueous solution were investigated by fluorescence, dynamic and static light scattering (DLS and SLS), and transmission electron microscopy (TEM). The critical aggregates concentration was determined at ~ 0.10 mg/mL using fluorescence measurements. At this concentration, unassociated unimolecular micelles with diameter size of 40–50 nm were found by DLS, and were also studied by means of TEM. At a lower concentration, all the OAPS–PEO self-assembled into loose balls. With the increase of the OAPS–PEO polymer concentration , OAPS centralizes to be the core of the aggregates. At the concentration of 2.0 mg/mL, aggregates present to be a core–shell structure.
研究领域:
高分子化学
·
纳米材料
·
软物质物理
·
胶体科学
✓ 已验证
DOI
高影响因子
JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
·
2021
·
IF 3.517
Yifan Huang,Lei Wang,Yi Liu,Tingxiao Li,Binjie Xin
The bilayer nanofibrous membrane fabricated via electrospinning technique can be considered as an ideal structure for the treatment of chronic skin diseases and exudative wound dressings. Wound exudate would affect healing and increases the likelihood of infection at the same time. Therefore, it is essential to produce a kind of wound dressing with relatively high hygroscopicity which could absorb wound exudate and provide a relatively dry healing environment. Bilayer nanofibrous membranes of poly(L-lactide-co-ε-caprolactone)/tetracycline hydrochloride- polyethylene oxide/sodium alginate-zinc oxide (PLCL/TCH-PEO/SA-ZnO) with drug delivery potential were prepared by electrospinning for wound healing. Then, a cross-linking which involved soaking the samples in an aqueous solution containing strontium ions for 4 h was conducted. SEM images showed that membranes still maintained the peculiar nanofibrous structure. The spinning aid (PEO) used was removed in the cross-linked alginate without affecting the PLCL/TCH outer layer gave the membrane good mechanical properties and manageability. The hydrophilicity of the mats was tested to evaluate the ability of the bilayer membrane to absorb exudate from the wound. In vitro drug release suggested that antibacterial agents TCH could release continuously more than 10 days. The cross-linked fibrous membrane has improved mechanical properties and fluid repellency, thus representing a barrier to the external environment and effective wound protection. Consequently, the bilayer fibrous scaffold with good hygroscopicity and drug release properties would have wide applications prospects for the treatment of chronic skin diseases and exudative wound dressings.
研究领域:
生物材料学
·
药剂学
·
医学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2015
·Vol. 19
·期 11
·3373-3379
·
IF 2.446
Li LinYan,Liu Xiaoyan,Zhu Kunlei,Tian Jianhua,Liu Xuesheng,Yang Kai,Shan Zhongqiang
Poly(ethylene oxide)-coated sulfur/carbon (S/C/PEO) composite with a high sulfur loading is prepared to improve the performance of lithium-sulfur batteries. By magnetic string, 3.7 wt% PEO is coated onto the surface of ball-milling obtained S/C composite, leading to synthesis of S/C/PEO composite containing 78 wt% S. It is confirmed from a series of measurements that PEO covers the S/C composite uniformly, and PEO coating is quite effective in stabilizing the electrochemical performance. When employed as cathode for lithium-sulfur batteries, S/C/PEO delivers an initial discharge capacity of 989.6 mAh g −1 and remains 648.3 mAh g −1 after 110 cycles at a discharge/charge rate of 1 C (based on sulfur weight). Meanwhile, the coulomb efficiency of S/C/PEO composite reaches to ~98 % during the latter 105 cycles. The improved electrochemical performance can be attributed to the formation of PEO coating layer which can keep a tight contact between carbon and sulfur and lead to improved conductivity. Moreover, the PEO coating can act as a flexible cushion to accommodate volume changes of sulfur cathode as well as a barrier to trap soluble polysulfide intermediates during the charge-discharge processes.
研究领域:
材料科学
·
能源科学
✓ 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）