查找使用阿拉丁产品的科研文献

Synthesis of a novel demulsifier by one-pot synthesis using two PEO-PPO demulsifiers as materials and the study of its demulsification performance

Fei Wang,Shenwen Fang,Ming Duan,Yan Xiong,Xiujun Wang

Enhancing the thermal stability of the bulk-heterojunction photovoltaics based on P3HT/PCBM by incorporating diblock amphipathic P3HT–PEO at D/A interface

Jikang Liu,Xiaoguang Zhu,Junli Li,Jiulin Shen,Guoli Tu

A diblock amphipathic copolymer P3HT–PEO was rationally designed and easily synthesized. By introducing P3HT–PEO into P3HT/PCBM blends, the intramolecular interaction between the P3HT–PEO and the donor/acceptor (D/A) molecule in the blends could make the P3HT–PEO located at P3HT/PCBM domains' interface, which could stabilize the morphology of the bulk-heterojunction and also suppress the acceptor PCBM from severe aggregations under prolonged annealing time. By doping only 5 wt% P3HT–PEO, the device-5 (with 5 wt% P3HT–PEO) exhibited a PCE of 3.60% with thermal annealing at 150 °C for 10 min and remained at 3.61% after annealing for 120 min. In contrasted to the device-0 (without P3HT–PEO), the PCE decreased from 3.26% to 1.61% after annealing at 120 min, which also showed lager clusters of PCBM. This finding will inspire new design of additive materials that can control BHJ morphology through to realize highly efficient and thermally stable solar cells.

Preparation and performance of long-life PEO-based solid-state batteries based on the complexation of 15 Crown ether 5 with lithium salt

Shi Jia Li,Guang Tao Fei,Shao Hui Xu,Wen Chao Chen,Hai Yan Xu,Xiao Xuan Qu,Xin Feng Li,Hao Miao Ouyang

Poly (ethylene oxide) (PEO)-based solid-state electrolytes are the most researched and widely used polymer solid-state electrolytes, but their ionic conductivity, electrochemical stability window, and cycling stability all need further improvement. In this work, 15 Crown ether 5 and the high concentration of lithium salts are added into PEO solid-state electrolytes using a solution-casting approach. The resulting solid-state electrolyte exhibits an ionic conductivity of 3.14 × 10 −3  S cm −1 at 60 °C and an electrochemical stability window exceeding 5.2 V. The assembled Li//Li symmetric battery can be stably cycled for over 850 h at a current of 0.1 mA cm −2 , and the LiFePO 4 //Li battery has an initial discharge capacity of 144 mA h g −1 at 2C rate, retaining 85 % of its capacity after 800 cycles. By optimizing the solid-state electrolyte components, Li//Li symmetric batteries can achieve cycling stability for up to 2200 h, and LiFePO 4 //Li batteries can endure up to 2000 cycles at a 2C rate and 4800 cycles at a 5C rate. Moreover, the prepared solid-state electrolyte can be matched with a high-voltage cathode electrode, offering a wide range of potential applications and promising commercialization prospects.

Study on a facile method of in-situ fabricating enhanced corrosion protection LDH/PEO composites coating on Mg alloy and its growth behavior

Wenyi Qiu,Xinglong Ye,Yan Liu,Bin Lin,Junfeng Chen,Lei Xiao,Chen Wang,Bingshu Wang,Xiping Cui,Linchi Zou

In order to achieve in-situ growth of layered double hydroxides (LDH) film on plasma electrolytic oxidation (PEO) coating of AZ31B magnesium alloy under mild conditions, a facile method was used in this work, that is ethylenediaminetetraacetic acid (EDTA)-assisted growth method. Compared to the conventional hydrothermal method, the fabrication of LDH/PEO composite coating by this method does not require a high temperature and high pressure environment and is not constrained by the size of the reactor. Furthermore, the obtained LDH/PEO composite coating exhibits enhanced corrosion protection, which will be widely applied in corrosion protection field of surface engineering. In this work, an effective strategy to control the dissolution of PEO coating and the growth of LDH film by regulating the concentration of EDTA was proposed, after revealing the growth behavior of LDH on PEO coating during this facile fabrication process. The growth behavior of LDH film can be briefly summarized in three stages: PEO coating dissolution, LDH nucleation, and LDH growth. Interestingly, the growth mechanism of LDH was changed with EDTA assistance. LDH shifted from preferential growth within the micropores of the PEO coating to uniform growth. With the assistance of 0.06 M EDTA, which is optimal, the dissolution of original PEO coating provided a stable and sufficient Mg source for the growth of LDH film, resulting in a dense LDH network structure on the PEO coating. This uniformly grown LDH film could not only seal the inherent defects of the PEO coating but also exhibited the ability to adsorb corrosive anions, which increases the tortuosity and difficulty in penetration of corrosive media, significantly improving the corrosion resistance of the LDH/PEO composite coating.

Strongly cross-linked three-dimensional Li1−xMn2O4/C/SA-c-PEO@GF electrode for lithium recovery from high Mg2+/Li+ ratio salt lake brine

Jinghai Zhang,Kangjun Ji,Zirui Wang,Wei Shi,Zhongkai Zhao,Xiao Du,Xiaogang Hao

The rapid growth in lithium demand for battery applications has driven the need for safe and efficient extraction technologies from salt lake brines. Current methods face challenges including low recovery rates, slow adsorption kinetics, and environmental concerns from organic solvent usage. To address these limitations, the environmentally friendly electrochemically switched ion exchange (ESIX) system using a three-dimensional LiMn 2 O 4 /C/SA-c-PEO@GF electrode was developed. The electrode employs sodium alginate (SA) and polyethylene oxide (PEO) as chemically cross-linked binders on a graphite felt (GF) current collector. In the constant current-constant voltage coupling drive mode, the system achieved 97% lithium extraction efficiency with an adsorption capacity of 3.89 mg·g −1 and a Li + /Mg 2+ separation coefficient of 191, the energy consumption was 14.51 Wh·mol −1 and 485 mg·L −1 Li + solution was obtained from actual Zarkhan Salt Lake brine (Mg 2+ /Li + : ∼426.6) by one-step concentration. This study shows the LiMn 2 O 4 /C/SA-c-PEO@GF electrode with high extraction efficiency and fast adsorption rate, providing a simple and efficient method for lithium recovery from salt lake brine with high Mg 2+ /Li + ratio.

Enhanced stability in pseudocapacitors: Synthesis and characterization of a novel cathode material incorporating cinnamate and ferrocenyl functional groups

Xueyi Chang,Yongfu Qiu,Zhiyu Cheng,Guiping Tan,Qun Luo,Muqing Chen

This study reports the synthesis of a novel block copolymer, PEO-PFc-PCA, comprising cinnamic acid and ferrocene units via Atom Transfer Radical Polymerization (ATRP), and its application as a positive electrode material in pseudocapacitors. Ferrocene functions as redox-active sites for energy storage, while cinnamic acid, when crosslinked under UV light, forms a nano-network that reduces ferrocene leaching, thereby enhancing the stability and lifespan of the pseudocapacitors. Comprehensive structural characterization, including nuclear magnetic resonance and UV–visible spectroscopy, was conducted on PEO-PFc-PCA. Electrochemical tests—cyclic voltammetry, galvanostatic charge/discharge, and electrochemical impedance spectroscopy—revealed that UV crosslinking improved the electrochemical performance, indicated by a slight increase in current and extended charging plateaus. Specific capacitance and energy density increased by 10 % post-crosslinking, demonstrating improved energy storage capacity. Nyquist plots showed reduced internal and charge transfer resistance after crosslinking, enhancing the electrochemical pathway. Stability tests indicated that crosslinked PEO-PFc-PCA retained 90.1 % of its capacitance after 3000 cycles, compared to 86.6 % pre-crosslinking, highlighting its superior longevity. This research presents a promising approach to enhancing pseudocapacitor energy storage through cinnamic acid photopolymerization, potentially benefiting broader pseudocapacitive electrode designs.

Flexible “polymer-in-ceramic” composite solid electrolyte PI–PEO0.2–PDA@LATP0.8 and its ionic conductivity

Lei He,Jian-Hua Cao,Ya-Kun Wang,Da-Yong Wu

Increasing the proportion of inorganic electrolytes in organic–inorganic composite electrolytes can significantly improve the ionic conductivity of composite electrolytes. However, this method is confronted with some problems, such as the uneven dispersion of inorganic electrolytes and the aggregation of nanoparticles, which results in a worse performance of the electrolytes’ interface. In this study, we had the dopamine hydrochloride molecules self-polymerized on the surface of inorganic ionic conductor lithium titanium aluminum phosphate (LATP) particles to obtain PDA-coated LATP nanoparticles. Then, the coated LATP particles were composited with PEO at a ratio of 80 : 20, with the LATP's evenly dispersed in the PEO, and no aggregation happened. On adding a small amount of electrolyte (5 μL cm−2, 1 M Li TFSI), the ionic conductivity of the electrospun PI-loaded PEO0.2–PDA@LATP0.8 flexible composite solid electrolyte reached 2.07 × 10−4 at 30 °C and 2.05 × 10−3 S cm−1 at 80 °C. NCM811‖Li batteries assembled with this electrolyte had an initial discharge capacity of 178.0 mA h g−1 at 30 °C, and still remained at 172.1 mA h g−1 (96.7%) after 200 cycles. The research shows that there are three main conduction pathways of Li+ in this electrolyte: through the segments of the polymer chains, through the interface between the polymer and inorganic ionic conductor, and through the passage composed of a continuous inorganic ionic conductor. Further results show that the coating of LATP by PDA does not block the transmission of Li+ both inside the crystal and at the crystal interface of LATP.

Construction of a Layered-Cavity Structure via Spin-Coating a PEDOT:PSS/PEO/SWCNT Suspension onto PBAT/MWCNT Electrospun Films and the Enhanced Electromagnetic Shielding Performance

Min Zhao,Fahu Yang,Dinggao Wang,Chao Zhang,Shaomin Zhou,Lin Li,Zhongming Li,Haili Zhao,Tao Chen

The development of porous films with biodegradability, high electromagnetic interference (EMI) shielding, and thermal conducting performance for advanced electronics is urgent. Herein, a superthin and flexible film composed of PBAT/MWCNT and PEDOT:PSS/PEO/SWCNT is fabricated through combining electrospinning and spin-coating. In this work, the content of PEO and SWCNT should be controlled to 1 and 10 wt % for achieving the optimal layered-cavity structure within the film, guaranteeing the proper flow ability of the suspension. The robustly constructed layered-cavity structure within the film allows the electromagnetic waves to suffer multiple reflections, which enhances the EMI shielding performance. Meanwhile, the structure also plays an important role in promoting the electric and heat conduction of the film. Consequently, the film with a thickness of 0.14 mm exhibits the most optimal EMI shielding efficiency (SE) of 26.02 dB, electrical conductivity of 40.371 S/m, and thermal diffusion coefficient of 0.124 mm2/s. The EMI SE/thickness is about 185.86 dB/mm, attaining a cutting-edge level compared to reported polymer-based films. Besides, the PEO or SWCNT content should be controlled, and the two-side spin-coating is also needed for thicker films. This work offers a method to develop superthin biodegradable films with excellent performance, positioning it as a strong alternative for flexible electronics.

PEO-SA-NaTFSI-Based Binder with Enhanced Adhesion, Fast Ion Transport, and Robust Solid-Electrolyte Interphase for Sn Anodes Enabling High-Performance Sodium-Ion Batteries

Hanxin Qian,Zhan Wu,Zhouyu Huang,Menglu Lu,Jiayuan Xiang,Fangfang Tu,Zheyu Jin,Jianping Xu,Yongping Gan,Xinping He,Hui Huang,Xinhui Xia,Yang Xia,Wenkui Zhang,Jun Zhang

Sodium-ion batteries (SIBs) are promising for large-scale energy storage due to their high cost-effectiveness and safety. Alloy anodes exhibit significantly higher specific capacities compared to those of carbonaceous anode materials, holding great promise for enhancing the energy density of SIBs. However, their practical application is severely hindered by substantial volume expansion, sluggish reaction kinetics, and continuous fracture reformation of the solid-electrolyte interphase (SEI). Here, a multifunctional composite binder system was designed for the Sn anode, which was composed of poly(ethylene oxide) (PEO), sodium alginate (SA), and sodium bis(trifluoromethylsulfonyl)imide (NaTFSI). The PEO-SA-NaTFSI (PSN) binder integrates ternary synergistic functions: robust adhesion between the active material and current collector, enhanced Na+ transport kinetics, and formation of a stable NaF-rich SEI. Therefore, the Sn-PSN anode achieves an outstanding sodium storage performance with a high capacity of 583.4 mA h g–1 at a current density of 10 A g–1 and 77% capacity retention after 1500 cycles. In addition, the Sn-PSN||Na3V2(PO4)3 full battery can maintain 81% capacity after 200 cycles with an electrode energy density of 169.0 W h kg–1. This work provides a multifunctional binder design strategy with broad application prospects for high-performance anodes of SIBs.

Coupling alloyed lean lithium anodes with PIM-1-blended PEO electrolytes synergistically promotes reversible Li stripping/deposition reactions for all-solid-state lithium-metal batteries

Y. Zhang,X. Lou,J. Dan,C. Franke,L. Tang,J. Li,Z. Gao,L. Zhou,B. Chen,T. Li,T. Liu

All-solid-state lithium batteries with lean (ultrathin) lithium anodes and polymer-based electrolytes e.g., polyethylene oxide (PEO), can potentially offer high energy density , reduced processing cost and improved mechanical contact at electrolyte-electrode interfaces. The non-uniform lithium deposition and inadequate mechanical strength of PEO, however, tend to cause deactivated lithium and short-circuiting by Li dendrites over lithium deposition/stripping cycles; these issues become more aggravated with lean Li anodes due to the more severe volume changes. Herein, we construct a more mechanically and chemically stable lithium-electrolyte interface by coupling alloyed lean Li anodes (<50 μm) with PEO electrolytes blended with polymers of intrinsic porosity (PIMs). The lean Li anode is fabricated by a facile and scalable cold-rolling method, which leads to a uniformly alloyed lithium anode permitting epitaxial Li deposition. Meanwhile, PIM reinforces the mechanical strength of the PEO composite electrolyte, reducing the likelihood of dendrite formation/penetration. Importantly, the introduction of both GaInSnZn and the first-generation PIM has been found to reduce the interfacial charge transfer resistance via modifying the composition of solid-electrolyte interphase. The resulting full cells with lithium iron phosphate cathodes exhibit a high specific capacity of ∼160 mAh/g, i.e., ∼0.6 mAh/cm 2 with excellent retention of 93.1 % at 120 cycles.

Incorporating Binary Metal Oxides in Poly(ethylene oxide)-Based Solid Electrolytes by Vapor Phase Infiltration

Wenda Bao,Yue Zhang,Rongliang Shang,Fufei Cong,Haojie Zhao,Yuqing Zuo,Beili Yi,Jin Xie

Vapor phase infiltration (VPI) derived from atomic layer deposition (ALD) enables inorganic materials to nucleate and grow within the free volume of polymers, which has shown promising prospects in the field of composite solid polymer electrolytes (CSPEs). However, there are only a few types of metal oxides that can be incorporated into the polymer matrix by VPI, let alone binary metal oxides, due to the limited knowledge of the VPI synthesis process. To combine the merits of different metal oxides, we investigate the VPI method to prepare ZnO-Al2O3 composites in poly(ethylene oxide) (PEO). When the introducing order is Al2O3/ZnO (AZO), due to the extremely high reactivity of trimethyl aluminum (TMA) with PEO, VPI-Al2O3 will accumulate near the surface of PEO. The surface Al2O3 layer inhibits the further diffusion of the diethyl zinc (DEZ) into the PEO matrix, leading to weak polymer–filler interactions and limited improvement of the Li+ conduction. In the incorporation order of ZnO/Al2O3 (ZAO), the moderate reactivity of DEZ renders the uniform distribution of VPI-ZnO within PEO, and the following TMA can both react with PEO and VPI-ZnO particles near the surface of PEO, which not only preserves the interactions between VPI-ZnO and PEO but also better inhibits the growth of lithium dendrites. The incorporation order plays a crucial role in the morphology and composition of binary metal oxides synthesized by VPI.

Nb2CTx MXene boosting PEO polymer electrolyte for all-solid-state Li-S batteries: two birds with one stone strategy to enhance Li+ conductivity and polysulfide adsorptivity

Liu Si-Ming,Chen Meng-Xun,Xie Ying,Liu Deng-Hua,Zheng Jin-Fei,Xiong Xiang,Jiang Heng,Wang Li-Chang,Luo Heng,Han Kai

All-solid-state lithium-sulfur (Li-S) battery is regarded as next-generation high energy density and safety battery system. The key challenge is to develop a compatible high-performance solid-state electrolyte. Herein, a two birds with one stone strategy is proposed to simultaneously enhance Li + conductivity and polysulfide adsorptivity of poly(ethylene oxide) (PEO)-based polymer electrolyte via the integration of Nb 2 CT x MXene. Moreover, the sheet size of Nb 2 CT x MXene is crucial for the enhancement of Li + conductivity and polysulfide adsorptivity, attributing to the difference in a specific surface area related to the percolation effect. By tuning the sheet size of Nb 2 CT x MXene from 500–300 nm to below 100 nm, the ionic conductivity of the PEO electrolyte is increased to 2.62 × 10 −4 S·cm −1 with improved Li + transference number of 0.37 at 60 °C. Furthermore, theoretical calculation and X-ray photoelectron spectroscopy (XPS) conjointly prove that polysulfides could be effectively adsorbed by Nb 2 CT x nanosheets via forming Nb−S bonding to inhibit their shuttle in the PEO framework. As a result, the all-solid-state Li-S cell exhibits an initial capacity of 1149 mAh·g −1 at 0.5C and good cycling stability with 491 mAh·g −1 after 200 cycles. The results demonstrate the necessity of polysulfide inhibition and the application of Nb 2 CT x MXene in PEO-based electrolytes for all-solid-state Li-S batteries. Graphic