ADVANCED MATERIALS
·
2024
·
IF 27.4
Menghua Wu,Chuan Shi,Junwei Yang,Yu Zong,Yu Chen,Zhiguo Ren,Yuanxin Zhao,Zhao Li,Wei Zhang,Liyu Wang,Xinliang Huang,Wen Wen,Xiaolong Li,Xin Ning,Xiaochuan Ren,Daming Zhu
Resolving the sluggish transport kinetics of divalent Zn 2+ in the cathode lattice and improving mass-loading performance are crucial for advancing the zinc-ion batteries (AZIBs) application. Herein, PEO-LiV 3 O 8 superlattice nanosheets (PEO-LVO) with expanded interlayer spacing (1.16 nm) are fabricated to provide a high-rate, stable lifetime, and large mass-loading cathode. The steady in-plane expansion without shrinkage after the first cycle, but reversible H + /Zn 2+ co-insertion in PEO-LVO are demonstrated by operando synchrotron X-ray diffraction and ex situ characterizations. Moreover, the large capacity of PEO-LVO is traced back to the optimized Zn 2+ insertion chemistry with increased Zn 2+ storage ratio, which is facilitated by the interlayer PEO in lowering the Zn 2+ diffusion barrier and increased number of active sites from additional interfaces, as anticipated by density functional theory. Due to the optimized ion insertion resulting in stalled interfacial byproducts and rapid kinetics, PEO-LVO achieves excellent high mass-loading performance (areal capacity up to 6.18 mAh cm −2 for freestanding electrode with 24 mg cm −2 mass-loading and 2.8 mAh cm −2 at 130 mA cm −2 for conventional electrode with 27 mg cm −2 mass-loading). As a proof-of-concept, the flexible all-solid-state fiber-shaped AZIBs with high mass-loading woven into a fabric can power an electronic watch, highlighting the application potential of PEO-LVO cathode.
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
POLYMER TESTING
·
2024
·
IF 5
Shuangshuang Wang,Huizi Zhang,Jilu Ma,Dejia Liu,Tonghui Zhang,Yuchao Li,Guang Li
It is an urgent demand of polyethylene oxide with poor crystallinity, high electrolyte affinity and ionic conductivity in portable electronics usage. In the present work, crosslinked poly (glycidyl methacrylate) (PGMA) grafting modified PEO has been prepared. Firstly, PGMA with controlled chain length can be highly efficient covalent anchored on PEO main chain with the assistance of N-hydroxyphthalimide (NHPI) catalysis combined with activators regenerated by electron transfer ATRP (ARGET-ATRP). Then the grafted PGMA chains undergone crosslinked process in the presence of 4, 4-diaminodiphenyl sulfone (DDS) to produce crosslinked PEO -g -PGMA (C-PEO- g -PGMA) film. The film could be used in electronic devices, and it exhibit amorphous structure, higher electrolyte wettability and mechanical strength compared to that of pure PEO. Moreover, the performance for electrical double-layer capacitor (EDLC) assembled with electrolyte-soaked C-PEO- g -PGMA films were sharply higher than that of EDLC with PEO. The present study provides a novel and highly efficient methodology for the modification of poly (ethylene oxide) (PEO) through crosslinked grafting side chains.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOID AND POLYMER SCIENCE
·
2014
·Vol. 292
·期 12
·3243-3249
·
IF 2.41
Li Xiubing,Xiao Junjie,Wang Xi,Yi Chunwang,Su Shengpei
The pH-responsive inclusion complexation of comblike triblock polymer, P2VP- b -PPEOMA- b -P2VP, with α-cyclodextrin (α-CD) was studied. The triblock polymer was prepared by reversible addition–fragmentation chain transfer polymerization (RAFT) and formed inclusion complexes (ICs) after selective threading of the PEO segment of the triblock polymer through the cavities of α-CD units. For comparison, PPEOMA homopolymer was prepared, and the inclusion complexation with α-CD was also studied. The formed ICs were characterized by XRD and 1 H NMR. The results revealed that P2VP- b -PPEOMA- b -P2VP can form ICs with α-CD even when forming micelles, and the introduction of P2VP had a great influence on the solution property and the stoichiometry of EO to CD of the inclusion complexes depending on the concentration and the pH of the solution.
研究领域:
高分子化学
·
材料科学
·
超分子化学
✓ 已验证
DOI
高影响因子
POLYMER COMPOSITES
·
2025
·
IF 4.7
Zhenbang Zhang,Fahu Yang,Guangming Li,Jiahong Xiang,Yifan Zhong,Haili Zhao,Tao Chen,Guo Li
The poly-(3,4-ethylenedioxythiophene):poly(styrenesulfonic acid) (PEDOT:PSS), single-walled carbon nanotubes (SWCNTs), and polyethylene glycol (PEO) were composited and subsequently spin-coated on a Polydimethylsiloxane (PDMS) substrate to prepare a stretchable and flexible bilayer film, and the electrical resistance of the film was adjusted to be unchanged by the pre-stretching processing. The interpenetrating structure was formed within the PEDOT:PSS/SWCNTs/PEO film when the PEO concentration was 5 wt%. The PEDOT:PSS and SWCNTs served as the electric phase forming the conductive path, while the PEO acted as the elastic phase, thereby enabling the film to exhibit stretchability, flexibility, and high conductivity. The pre-stretching processing, which consisted of sequential uniaxial stretching and relaxation, resulted in wrinkling of the PEDOT:PSS/SWCNTs/PEO film due to the stretching strain exceeding the elastic deformation limit. The transmittance changes of the films subjected to the pre-stretching processing also proved that the wrinkles were formed. The film, comprising 5 wt% PEO and 10 wt% SWCNTs, exhibited a minimum sheet resistance of 43 Ω/sq. without pre-stretching and demonstrated stable electrical resistance when subjected to pre-stretching processing with 50% strain. The bilayer film with pre-stretching processing had achieved a comparable level of performance to that of contemporary medical electrodes for electrocardiogram detection. Meanwhile, the bilayer film without pre-stretching could be utilized as a strain sensor for monitoring body motion. Highlights Stretchable and flexible PEDOT:PSS/SWCNTs/PEO films were prepared. The interpenetrating structure of PEDOT:PSS/SWCNTs/PEO films was constructed using scanning electron microscopy and Fourier transfer infrared spectra. Pre-stretching processing could produce wrinkled structure on the surface of the bilayer film. The wrinkled structure makes the film exhibit electrical resistance stability.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Ning Lv,Qiuyitong Zhang,Yuexin Xu,Hanyang Li,Zijie Wei,Zhenhua Tao,Yadong Wang,Haolin Tang
Solid electrolyte (SE) is advantageous in inhibiting the growth of dendrites and avoiding battery short circuit as well as explosion. However, poor ionic conductivity and unstable interfacial contact have been the inherent issues of SEs. In general, the use of effective fillers and additives is regarded as the feasible solution to compensate for these issues. In this study, a polyethylene oxide (PEO)-based composite SE (P-P-L) with both LiAlO 2 (LAO) and polyacrylonitrile (PAN) additives was prepared to integrate the merits of inorganic and organic additives. Nanostructured LAO fillers formed a large number of ion transport regions in the matrix, which led to the increase in the ionic conductivity of the electrolyte to 3.60 × 10 –4 S cm −1 at 60 °C. Moreover, the PAN additive could interact with lithium sheets to form Li 3 N, which significantly reduced the interfacial impedance and improved the battery stability. As expected, the symmetric battery stably circulated for nearly 1000 h at 60 °C under current density of 0.1 mA cm −2 . The P-P-L, LiFePO 4 (LFP) cathode, and lithium sheet anode were assembled into the lithium metal battery , whose capacity retention rate could reach 92.0 % after 200 cycles at 60 °C under a current density of 0.5 C. The application of this electrolyte provides an efficient strategy for solving the interface problem of SE.
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 7
·3400-3408
·
IF 14.511
Cheng Wang,Tianqi Yang,Wenkui Zhang,Hui Huang,Yongping Gan,Yang Xia,Xinping He,Jun Zhang
The use of solid electrolytes can fundamentally change energy storage systems due to their higher safety and energy density. Herein, we design hydrogen-bonded polyethylene oxide (PEO) composite solid electrolytes (CSEs), which are hydrolyzed by tetraethyl orthosilicate (TEOS) in alkaline solution to form SiO2 with rich hydroxyl groups on its surface. This in situ formed SiO2 can not only reduce the crystallinity of PEO and increase the ionic conductivity (1.8 × 10−4 S cm−1 at 30 °C), but also adsorb anions so as to increase the lithium-ion transference number (tLi+ = 0.42). More importantly, hydrogen bonding can be formed with PEO, LITFSI and succinonitrile to form an interconnected network to improve the mechanical strength (Young's modulus = 0.72 GPa). In addition, we avoid the poor film formability and low mechanical strength by adjusting the ratio of EO : Li to 30 : 1 to reduce the content of lithium salt in the CSEs. Due to the high mechanical strength, the critical current density of lithium symmetrical batteries is as high as 1.4 mA cm−2. Using this CSE, a solid state LiFePO4‖Li battery delivers a high discharge capacity of 161.2 mA h g−1 at 0.5C with a capacity retention of 88% after 400 cycles at 30 °C. The in situ formed highly dispersed SiO2 reinforced PEO with abundant hydrogen bonds enables high performance of solid-state lithium batteries at room temperature.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Xuezhi Liu,Qian Liang,Lining Chen,Junyan Tang,Junjie Liu,Mi Tang,Zhengbang Wang
Construction of polymer-based electrolytes with excellent mechanical properties and high ionic conductivity is highly desirable for solid-state lithium–metal batteries. Herein, a scalable strategy is suggested to achieve the high strength and high performance polymer-based solid-state electrolyte via filling polyethylene oxide (PEO)/Li-salt (LiTFSI) electrolyte into an interconnected metal–organic framework (MOF) network based on the typical hot-pressing process, in which the MOF network is grown on the polyacrylonitrile (PAN) electrospun fibrous membrane through an automated layer-by-layer (LbL) assembly spraying technique. The MOF network not only promises excellent mechanical properties and high thermal stability but also enhances ionic conductivity due to the resulting interconnected Li+ transport paths. In addition, such electrolyte also demonstrates a high Li+ transference number (0.68) and a wide electrochemical stability window (5.2 V). As a result, the assembled Li//Li symmetrical cell shows an ultrastable cycling performance even after cycling for 1800 h. Furthermore, its LiFePO4//Li full cell exhibits a high capacity of up to 120 mAh g–1 at 1 C and 30 °C and can maintain a rather high capacity retention of 95% after 160 cycles. This study provides some inspirations for the fabrication of high performance polymer-based solid-state electrolytes in a large scale.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Yong Liu,Chong Liu,Ting Zhao,Weijie Kou,Quanxian Hua,Wenhao Ren,Wenjia Wu
Inorganic superionic conductors hold great promise for all-solid-state lithium batteries because of their superior ionic conductivity. However, their application as electrolytes is limited by the trade-off between ion conduction and stability. Here, a thin composite solid electrolyte, vermiculite-Li 0.33 La 0.557 TiO 3 /poly(ethylene oxide) (Vr-LLTO/PEO), is prepared by in-situ co-sintering an interconnected Vr-LLTO framework and then impregnating PEO. Within this electrolyte, the continuous LLTO on Vr nanosheet surface acts as efficient pathways for vertical Li + transfer with reduced grain boundary resistance. Together with the thin thickness (35 μm), Vr-LLTO/PEO electrolyte attains the ionic conductivity as high as 1.04 × 10 −4 S cm −1 at 25 °C, over three times that of LLTO pellet and surpassing that of most reported ceramic electrolytes. Furthermore, the disordered stacked Vr nanosheets in framework are covalently linked by LLTO, together with the flexible PEO matrix, achieving highly enhanced structural stability with compressive strength of 319 MPa. In this manner, the trade-off between ion conduction and stability is overcome, which allows the assembled LiFePO 4 /Li cell achieving satisfactory cycling performances: an initial discharge capacity of 150.3 mAh g − 1 at 1 C and capacity decay of only 0.08% per cycle after 200 cycles. This study may inspire insights into the subtle design of conductive and stable electrolytes for high-performance devices.
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
GREEN CHEMISTRY
·
2024
·
IF 9.3
Liequan Liu,Zikang Gong,Chen Liu,Aiping Peng,Ze Zhang,Ji Yu,Jianxin Cai,Zhenyu Yang
Due to the inherent limitations of commercial liquid electrolytes, such as flammability, volatility, leakage, and their inability to effectively inhibit the growth of lithium dendrites, the lithium battery research community has shifted its attention towards advancing solid-state electrolytes. Notably, polyethylene oxide (PEO) has emerged as a respected solid-state electrolyte, but its ionic conductivity still exhibits a relatively modest level. In this study, we fabricated the Li-IL@Fe-BDC composite by integrating lithium salt-loaded ionic liquids (Li-ILs) into cost-effective and environmentally friendly Fe-based MOF frameworks (Fe-BDC). The resulting composite filler was then incorporated into a PEO matrix, yielding flexible composite polymer electrolytes (CPEs) with a “brick and mortar” hybrid structure. This unique arrangement enhances the mechanical strength of CPEs, providing dispersed sites and multi-ion transport channels. Consequently, it achieves a high conductivity of approximately 4.9 × 10−4 S cm−1, an extended electrochemical window of about 4.8 V, and a notable Li+ transference number of ∼0.6. Moreover, the composite demonstrates excellent interfacial compatibility with the Li metal and remarkable resistance against dendrite growth during plating/stripping cycles, sustaining over 800 hours at a current density of 0.2 mA cm−2. Furthermore, LiFePO4/CPEs/Li cells exhibit outstanding capacity retention, reaching as high as 95.8% after 700 cycles at 1 C. These exceptional electrochemical performances can be attributed to the distinctive characteristics of the Li-IL@Fe-BDC composite filler, which provides multiple pathways for lithium ion migration and enhances interfacial stability. Consequently, this study unveils a promising approach for achieving high Li-ion conductivity and interfacial stability in CPEs, offering valuable insights for future breakthroughs in this burgeoning field with a focus on green chemistry principles.
研究领域:
材料科学
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Rong-Ao Tong,Linhui Chen,Gang Shao,Hailong Wang,Chang-An Wang
With the increasing demand for higher energy density Lithium-ion batteries, the battery safety issue has gained growing attention. Solid-state electrolytes (SSEs) are considered a promising solution to the volatilization and inflammable problems of the traditional liquid electrolytes . In this work, we propose a novel solvent-free modification process using stearic acid as a modifying agent for LLZTO/PEO hybrid electrolytes. Compared to the conventional solvent-casting process, the new one integrates surface modification and composite in a successive solvent-free step, so it can greatly improve the process efficiency and meet the requirement of green chemistry. Fourier Transform Infrared spectrometry (FTIR), X-Ray Diffraction (XRD) and Transmission Electron Microscope (TEM) observation confirm the structure of the uniform coating layer . The solvent-free modification and composite process are proved to significantly inhibit the agglomeration of LLZTO particles and the side reactions on particle surfaces in the polymer matrix by using Scanning Electron Microscope (SEM) and Thermal Gravimetric-Differential Thermal Analysis (TG-DTA) characterization. Thus, the prepared electrolyte has the ionic conductivity of up to 8.3 × 10 −4 S cm −1 at 70 °C. It has better electrochemical stability as well, which can achieve about 900 cycles in Li symmetric cells with a current density of 0.1 mA cm −2 .
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 21
·13261-13266
·
IF 4.036
Tao Li,Hongjun Kang,Songtao Lu,Wei Qin,Xiaohong Wu
As deep space exploration moves farther and farther away, thermal control coating of the in-orbit spacecraft will suffer a serious vacuum-ultraviolet radiation environment, which seriously threatens the reliability of the spacecraft in orbit. Therefore, it is important to improve the vacuum-ultraviolet resistance performance of the thermal control coating. In this work, the inorganic Al2O3–ZnO–Y2O3 thermal control coating was in situ fabricated on a 6061 aluminum alloy surface by PEO technology, and its vacuum-ultraviolet resistance performance was investigated. The results show that the Al2O3–ZnO–Y2O3 thermal control coating has a good resistance performance to vacuum-ultraviolet radiation, which is mainly because the large extinction coefficients of the ZnO and Y2O3 materials in the ultraviolet band are conducive to improving the ultraviolet resistance performance. Furthermore, the life prediction model of the Al2O3–ZnO–Y2O3 thermal control coating shows that its Δαs value first slightly increases and then tends to be stable with the increase of ultraviolet irradiation time from 0 ESH to 25 000 ESH, and the maximum variation of Δαs is about 0.0536. This work provides a material basis and technical support for the thermal control system of spacecraft with long life and high reliability.
研究领域:
材料科学
·
航天工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMBUSTION AND FLAME
·
2021
·
IF 4.185
Shuai-Zhong Wang,Jie-Yao Lyu,Wei He,Pei-Jin Liu,Qi-Long Yan
Electrically controlled solid propellant (ECSP) is one promising solution for thrust adjustment and repeated ignition of conventional solid rocket motors (SRM). However, the widely studied ECSP based on hydroxylammonium nitrate (HAN) faces the problems of strong hygroscopicity and low thermal stability, which can lead to failure of ECSP. Inspired by polyethylene oxide-polyacrylonitrile (PEO-PAN) based solid polymer electrolyte , the new PEO-PAN based ion conductive energetic composites (ECs) have been designed and evaluated in this paper. The formulation was theoretically determined based on the energy content, and the samples were prepared by a conventional milling mixing method. The morphology, ionic conductivity , thermal reactivity, decomposition gaseous products and combustion behavior of these new ECs have been comprehensively studied. It has been shown that the initial decomposition temperature of PEO-PAN based ECs is around 243 °C with heat release of 1677.8–1873.9 J·g −1 depending on the oxidizer and polymer content. Meanwhile, the dependences of the ionic conductivity on the burning rate are evaluated. The results showed that the burning rate decreases as ionic conductivity increases. One of these ECs has a high ionic conductivity with a low burning rate under pressure, which is suitable for controllable ECSP.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）