CELLULOSE
·
2024
·
IF 4.9
Ma Jianzhe,Nan Hui,Yang Guijun,Li Zhike,Wang Jianhao,Zhou Jingyuan,Xue Caihong,Wang Xianlan,Xu Shiai
Flexible lithium-ion batteries (LIBs) are receiving widespread attention, and how to obtain the high flexibility, safety, and energy density of LIBs at the same time are one of the main challenges in the field of flexible electronics. The multi-network structure formed by cellulose nanofiber (TOCNF) not only provided sufficient mechanical support and excellent flexibility for the electrode but also promoted uniform distribution of conductive agents and active materials. In this work, we prepared an eco-friendly TOCNF binder from wheat straw, using a method involving 2, 2, 6, 6-tetramethylpiperidinyl-1-oxyl oxidation and high-intensity ultrasonic treatment. Additionally, we enhanced the performance of TOCNF by introducing Li + through ion exchange, resulting in lithium-functionalized cellulose nanofibers (TOCNF-Li), which were employed as a novel binder for LiFePO 4 cathodes. The findings show that, when employing TOCNF-Li binder, batteries were able to obtain an initial discharge capacity of 163 mAh g –1 at 0.1 C rate and maintained 93.2% of the initial reversible capacity after 400 cycles at 2 C rate. Notably, at 5 C rate, the discharge capacity reached 133.7 mAh g −1 , with a capacity decay of only 16.1%. TOCNF-Li played a role in increasing Li + content, opening a new pathway for Li + transport, consequently enhancing Li + diffusion efficiency and charge–discharge performance. Overall, TOCNF-Li serves as a novel, environmentally friendly, and efficient binder for flexible LIBs.
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
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Shengxi Meng,Hao Ruan,Qiannan Yu,Qiang Zhao,Caihong Wang,Yong Wu,Shuai Tan
Ionic liquids are promising to rival traditional organic solvent to develop safe electrolytes for Li-ion batteries. However, the ionic liquid-based electrolytes still suffered from issues of inferior performance and potential leakage. Here, non-ionic surfactant Brij58 was introduced into ionic liquid electrolytes (BMPTFSI/LiTFSI) consisting of 1-butyl-1-methylpyrrolidinium bistriflimide (BMPTFSI) and LiTFSI salt to construct solid-state lyotropic liquid crystals (LLCs). Self-assembly of Brij58 in ionic liquid electrolytes constructed lamellar nanostructures, which confined the ionic liquid electrolytes to form layered conducting channels. The nanoscale layered conducting channels in solid-state LLC electrolytes endowed liquid-like ion conductivity and significantly improved Li-ion transfer. Although the LLC electrolytes only consumed 50 wt % BMPTFSI/LiTFSI, the discharge capacities and rate performance of the Li-ion batteries based on LLC electrolytes was much improved comparing to that containing pristine BMPTFSI/LiTFSI. Also, the flame-retardant feature retained within the lamellar LLC electrolytes. The work paved new way for optimizing the conducting performance of IL electrolytes by constructing lamellar lyotropic LLC nanostructures.
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 SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 11
·8923-8932
·
IF 2.22
Su Yu,Zhang Lei,Liao Bing,Mai Yu L.,Dai Yong Q.,Hu Wei
For electrically conductive adhesives (ECAs), high electrical conductivity generally conflicts with excellent mechanical properties because electrical conductivity increases while desirable mechanical properties decrease with the increase in loading of conductive fillers or removal of lubricants on the silver filler surface. In this work, a method was developed to improve both the electrical conductivity and mechanical properties of the ECAs by introducing double bonds. Itaconic acid (IA) was used to replace the lubricant on the silver flake (Ag-F) surface, and acrylic acid (AA) was used as part of the ECA resin matrix. IA can replace the lubricant on the Ag-F surface, similar to other short-chain dibasic acids, to improve the ECA electrical conductivity. Furthermore, IA can be polymerized with AA to form covalent bonds between the silver flakes and the resin matrix, enhancing the mechanical properties of ECA. Compared with ECA filled with commercial silver flakes, the electrical conductivity of ECA filled with IA-treated silver flakes increased by ~ 21%, and the lap shear strength increased by ~ 29%.
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
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 21
·18566-18572
·
IF 2.324
Zhang Wenna,Zhang Wenwen,Xue Zexu,Xue Yu,Xu Jingkun,Chen Shuai,Zhang Ge
Poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) is a hotspot among current researched conducting polymers and its conductivity could be significantly enhanced by post-treatment with dimethyl sulphoxide (DMSO). In this work, five S and Se analogues of 3,4-ethylenedioxythiophene (EDOT) were synthesized, and chemically oxidative polymerized (COP) to obtain corresponding free-standing films of Poly(3,4-ethylenedioxythiophene)s:poly(4-styrenesulfonate) (PEDOTs:PSS). The effect of chalcogen substitution on the physicochemical properties and conductive performances of PEDOT:PSS film have been demonstrated. In contrast to the conductivities about 10 −2 –10 −1 S cm −1 for PEDOT:PSS and poly(3,4-ethylenedioxyselenophene):poly(4-styrenesulfonate) (PEDOS:PSS), other PEDOTs:PSS films had the conductivities about 10 −4 –10 −5 S cm −1 . The conductive enhancement effect of DMSO second-doping is suitable for PEDOTs:PSS films except the all-sulfur analogs of PEDOT:PSS (PEDTT:PSS and PEDTS:PSS), and the critical role of the presence of the O atoms in the ethylene bridges and the S atom in the thiophene ring has been illustrated. This work may help understand the structure-performance relationship of PEDOT family and the further development of PEDOTs in areas where the PEDOT seems monotonous and the high conductivity is not necessary, such as antistatic coating, anticorrosive coating, multi-colored electrochromics and so on.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2015
·Vol. 26
·期 12
·9941-9948
·
IF 1.569
Zhang Rong,Lu Yi,Wei Ling,Fang Zhenggang,Lu Chunhua,Ni Yaru,Xu Zhongzi,Tao Shunyan,Li Peiwen
Double perovskite oxides Gd 0.8 Ca 0.2 BaCo 2 O 5+δ have been successfully prepared by EDTA-citrate complexation process. The prepared samples were characterized by means of thermogravimetry–differential analysis, X-ray diffraction, Fourier transform infrared spectroscopy techniques. These analyses suggested that pure Gd 0.8 Ca 0.2 BaCo 2 O 5+δ phase could be formed when the pH value was maintained above three and calcination temperature was higher than 850 °C. The conductivity properties analyzed by means of four probes method, scanning electron microscopy and X-ray photoelectron spectroscopy indicated an improvement in conductivity with a high value of nearly 1200 S/cm, which was due to an increase in the number of small polaron hopping conduction units, Co 3+ –O–Co 4+ . Interestingly, the Gd 0.8 Ca 0.2 BaCo 2 O 5+δ samples exhibited a semiconducting behavior through a wide range of temperature below 100 °C and a metallic behavior at 100–500 °C, thereby demonstrating that Gd 0.8 Ca 0.2 BaCo 2 O 5+δ could meet the requirements of a smart material.
研究领域:
材料科学
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固体物理
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产品关联
DOI
高影响因子
ADVANCED ENGINEERING MATERIALS
·
2024
·Vol. 26
·期 23
·2401659
·
IF 3.4
Song Han,Liu Zhang,Gaohui Sun,Jun Wang,Shihui Han
Composites comprising conductive polymers and metal particles have garnered considerable interest in sensor technology due to their excellent electrical conductivity. However, producing controllable pressure sensors that retain high sensitivity under microstress remains challenging. Polyimide (PI) sponge exhibits excellent chemical and thermal stability and a porous structure that facilitates considerable deformation under low stress levels and results in good sensitivity to external forces. Herein, a conductive polymer–metal composite conductive phase, polypyrrole–silver (PPy–Ag), is directly fabricated on the PI surface through incipient network conformal growth. This method ensures that the PPy–Ag composite maintains optimal performance within its original temperature range, thereby enhancing detection sensitivity at low stress levels. The maximum conductivity of the fabricated PPy–Ag/PI composite sponge-based flexible piezoresistive sensor is 2.42 × 10 −4 S m −1 , and the sensitivity is recorded at 16.31 kPa −1 within a stress range of 0–80 Pa. After undergoing 1000 compression cycles, the sensor exhibits commendable stability and reproducibility.
研究领域:
材料科学
·
传感器技术
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产品关联
DOI
高影响因子
Nanoscale
·
2015
·Vol. 7
·期 32
·13694-13701
·
IF 7.394
Yuanyuan Song,Yaoquan Jiang,Liyi Shi,Shaomei Cao,Xin Feng,Miao Miao,Jianhui Fang
Natural biomass based cellulose nanopaper is becoming a promising transparent substrate to supersede traditional petroleum based polymer films in realizing future flexible paper-electronics. Here, ultrathin, highly transparent, outstanding conductive hybrid nanopaper with excellent mechanical flexibility was synthesized by the assembly of nanofibrillated cellulose (NFC) and silver nanowires (AgNWs) using a pressured extrusion paper-making technique. The hybrid nanopaper with a thickness of 4.5 μm has a good combination of transparent conductive performance and mechanical stability using bamboo/hemp NFC and AgNWs cross-linked by hydroxypropylmethyl cellulose (HPMC). The heterogeneous fibrous structure of BNFC/HNFC/AgNWs endows a uniform distribution and an enhanced forward light scattering, resulting in high electrical conductivity and optical transmittance. The hybrid nanopaper with an optimal weight ratio of BNFC/HNFC to AgNWs shows outstanding synergistic properties with a transmittance of 86.41% at 550 nm and a sheet resistance of 1.90 ohm sq−1, equal to the electronic conductivity, which is about 500 S cm−1. The BNFC/HNFC/AgNW hybrid nanopaper maintains a stable electrical conductivity after the peeling test and bending at 135° for 1000 cycles, indicating remarkably strong adhesion and mechanical flexibility. Of importance here is that the high-performance and low-cost hybrid nanopaper shows promising potential for electronics application in solar cells, flexible displays and other high-technology products.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
npj Flexible Electronics
·
2018
·Vol. 2
·期 1
·1-7
·
IF 0
Bai Xiaopeng,Lin Sen,Wang Haolun,Zong Yi,Wang Haiyang,Huang Ziyun,Li Donglai,Wang Chang,Wu Hui
Ultrathin, patterned, conducting metallic fibers have been extensively studied as building blocks in flexible electronics. However, their scalable processing and attainment of patterns at room temperature is challenging. In this paper, we report on the patterning of ultra-long silver submicron fibers as woven mesh through the process of continuous draw spinning in the presence of ultraviolet (UV) treatment. The silver fibers can be directly intertwined on flexible substrates, such as polyethylene terephthalate (PET) and polyimide (PI). The as obtained silver submicron fiber mesh present excellent photoelectric properties ( T = 90%, R = 9 Ω sq −1 ) and outstanding flexibility and can be easily transferred on other surfaces. To demonstrate its application, flexible electrochromic smart window and infrared stealth film have been prepared.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
FIBERS AND POLYMERS
·
2023
·Vol. 24
·期 2
·459-468
·
IF 2.5
Lin Junxiong,Wang Peng,Zhu Lei
Silver nanoparticles (Ag NPs) were synthesized on cotton fabrics through in-situ radical reduction of Ag + with macromolecular alcohol radicals generated from a polymer blend under UV light. This light-induced approach permitted direct photopatterning of Ag particles on the surface of cotton fabric. The cotton fabrics were colored brown by the Ag NPs owing to their surface plasmon resonance characteristics, and the lighter brown or darker brown color could be adjusted by controlling the light exposure time or Ag + concentration in the synthesizing process. The Ag NPs loaded fabrics were investigated using SEM, EDX and XPS techniques. The results showed that Ag + ions were successfully reduced to metallic Ag NPs, and these particles could be clearly observed by the morphological observation study. The Ag NPs loaded cotton fabric exhibited satisfactory washing and rubbing colorfastness. In addition, the Ag NPs on the surface endowed the cotton fabric with good antibacterial activity and conductive performance.
研究领域:
材料科学
·
纺织工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Yuling Shi,Qing Liu,Qianqian Pan,Danlong Yang,Tao Wang
Polymer@metal core-shell microspheres are widely used in anisotropic conductive adhesives (ACAs). Styrene-divinylbenzene copolymer (PS-DVB) copper core-shell microspheres (PS-DVB@Cu) with high conductivity and anti-oxidation performance were successfully prepared by combining copper nanoparticles (Cu NPs) and electroless plating copper. The Cu NPs served as catalytic seeds, substituting noble metals to promote electroless deposition . Using environmentally benign ammonia borane as the reductant to replace toxic formaldehyde, the dense copper film was deposited on the surface of PS-DVB microspheres. The thickness of the Cu layer and bulk electrical resistivity of PS-DVB@Cu were tuned by controlling the concentration of the reducing agent. The minimum resistivity of PS-DVB@Cu was 3.27 × 10 −6 Ω·m and merely slightly changed in the air for two months. The prepared PS-DVB@Cu-based ACAs could be effectively applied to anisotropic conductive connections in small-scale circuits with satisfactory anisotropic conductivity.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Yi Cheng,Jie Tang,Yi-Min Zhu,Yu Chang,Zhen-Guo Yang
Fabrication of conductive patterns by selective electroless plating is a widely studied process in recent years for its advantages of lower waste, simpler process, less pollution and lower cost compared to the traditional subtractive process. But the poor adhesion of the as-fabricated patterns is the prior problem of this process, which limits the thickness of the conductive patterns in sub micrometer range and thus degrades the electrical properties of the patterns. Many chemical and physical modifications have been used to increase the chemical bonding or physical interaction between substrates and deposited metal, but the effects are limited, especially after thick metal is deposited. However, increasing the interfacial mechanical anchor is an effective alternative to enhance the adhesion but has often been neglected. In our previous work, we have developed a novel patterning-adsorption-plating (PAP) process to additively fabricate copper patterns on flexible polymer substrates. In this paper, polystyrene (PS) microspheres are added into the ion-adsorption ink as templates to fabricate three-dimensional (3D) porous polysiloxane films. Thereafter, the as-fabricated copper patterns show excellent conductivity competitive to that of bulk copper and good adhesion with a distinct increase of mechanical anchor.
研究领域:
材料科学
·
电子制造技术
✓ 已验证
DOI
高影响因子
iScience
·
2024
·
IF 4.6
Yongmao Guan,Liqing Yang,Chao Chen,Rui Wan,Chen Guo,Pengfei Wang
Crack pattern-based metal grid film is an ideal candidate material for transparent electromagnetic interference shielding optical windows. However, achieving crack patterns with narrow grid spacing, small wire width, and high connectivity remains challenging. Herein, an aqueous acrylic colloidal dispersion was developed as a crack precursor for preparing crack patterns. The ratio of hard monomers in the precursor, the coating thickness, and the drying mediation strategy were systematically varied to control the spacing and width of the crack patterns. The resulting dense and narrow crack patterns served as sacrificial templates for the fabrication of patterning metal grid films on transparent substrates, intended for optoelectronic applications. These films demonstrated excellent optoelectronic properties (82.7% transmission at 550 nm visible light, sheet resistance 4.1 Ω/sq) and strong EMI shielding effectiveness (average shielding effectiveness 33.6 dB at 1–18 GHz), showcasing their potential as a scalable and effective transparent EMI shielding solution.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）