JOURNAL OF MEMBRANE SCIENCE
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2019
·
IF 7.015
Peiqi Lun,Peng Liu,Haoqing Lin,Ziyang Dai,Zhenbao Zhang,Dengjie Chen
Solid polymer electrolytes have great potentials to overcome safety issues of organic liquid electrolytes for lithium-ion batteries (LIBs). However, the poor lithium-ion migration within solid polymers impedes the broad applications. In this work, composite polymer electrolytes (CPEs) are prepared by dispersing oxygen-ion conducting Sm-doped CeO 2 (SDC) nanowires into the polyvinylidene fluoride matrix. The ionic conductivity and the lithium-ion transfer number are greatly enhanced after the introduction of the SDC nanowires to CPEs, thanks to the increase of amorphous regions resulted from the SDC filler, the Lewis acid-base interaction due to the positively charged oxygen vacancies , and the partial dehydrofluorination. Specifically, CPE-10 with 10 wt% of the SDC nanowires reaches the ionic conductivity of 9.09 × 10 −5 S cm −1 at 30 °C with a lithium-ion transfer number of ∼0.40. Also, CPE-10 exhibits a relatively high oxidation potential of 4.89 V versus Li + /Li. Impressively, a quasi-solid-state CR2032 LiFePO 4 /CPE-10-20 μL/Li battery exhibits the initial capacity of as high as 155.1 mAh g −1 at 1 C, and it still delivers 155.3 mAh g −1 after 130 cycles, as well as the favorable rate performance (e.g., 135.1 mAh g −1 at 4 C). Besides, a lithium-oxygen battery (Super P/CPE-10-5 wt% LiI/Li) exhibits the initial discharge capacity of 5325 m A h g c a r b o n - 1 with the coulombic efficiency of 85.7%. Our work demonstrates that CPEs with the oxygen-ion conducting SDC nanowires could be potentially applied in quasi-solid-state LIBs and lithium-oxygen batteries.
研究领域:
材料科学
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电化学
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能源存储
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高分子物理
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固态离子学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yu Tong,Xi Chen,Hong-Peng Zhang,Jian-Yu Ling,Hao-Qun Zeng,Ke-Wei Zhang,Ming-Zhe Zhang
Ferroelectric materials exhibit switchable polarization and non-volatile characteristics, promising for applications in neural morphology calculations. Among them, multiferroic materials have garnered significant attention due to their simultaneous ferroelectricity and ferromagnetism. We synthesize Sm-doped SnS 2 wafer with interlayer screw dislocations through the vapor-liquid phase chemical deposition, high-temperature and high-pressure methods. Manufacturing a memory device based on Sm-doped SnS 2 wafer, which exhibits stable memory characteristics with a retention time of 10 6 s and can be repeated for up to 10 6 cycles. It can simulate the functional characteristics of biological synapses, such as excitatory postsynaptic currents, paired-pulse facilitation, and the transition from short-term to long-term plasticity. The recognition accuracy rate for handwritten numbers is as high as 92.5 %. Therefore, the addition of Sm leads to the formation of interlayer screw dislocations in the SnS 2 layers, which disrupts the symmetry of the system and causes the ferroelectric properties to emerge. The substitution of Sm for Sn closely integrates with the SnS 2 lattice, providing a stable local magnetic moment. The 4f electrons occupy the energy band near the Fermi level and undergo orbital hybridization with S, resulting in the formation of ferromagnetic exchange interactions, achieving the ferromagnetism. This work opens prospects for fabricating synaptic devices based on ferroelectric switching, which can be used in neuromorphic systems.
研究领域:
材料科学
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神经形态工程
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凝聚态物理
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铁电与多铁材料
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纳米电子学
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2014
·Vol. 6
·期 23
·9228-9233
·
IF 1.938
Fen-fang Deng,Cong Ding,Yu Wang,Wen-ting Li,Li-li Liu,He Li
Samarium doped cerium dioxide (CSO) nanostructures possessing a shell-like morphology were synthesised by a simple hydrothermal method. A novel nanocomposite membrane, comprising of CSO nanostructures, chitosan (CH) and a room temperature ionic liquid (RTIL) was deposited onto an indium-tin oxide (ITO) electrode for developing a DNA biosensor related to the breast cancer gene. The properties of the CSO and nano-composite membrane were studied by thermogravimetry (TG), X-ray diffraction (XRD), energy dispersive spectroscopy (EDS), scanning electron microscopy (SEM), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The hybridization capacity of the DNA biosensor was studied by differential pulse voltammetry (DPV) using [Fe(CN)6]3−/4− as an indicator. Under optimal conditions, the fabricated DNA biosensor could quantify a wide range of target DNA concentrations over the range of 1 × 10−13 to 1 × 10−6 M with good linearity (R = 0.9981) and a low detection limit of 1.56 × 10−14 M (3σ). Results showed that the fabricated shell-like CSO nanostructures and RTIL could enhance the electrical conductivity synergistically, which has great potential application in sensitive electrochemical biosensors.
研究领域:
材料科学
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生物化学
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电化学
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癌症诊断
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纳米技术
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 38
·2303736
·
IF 19
Qiong Liu,Faqi Zhan,Hang Luo,Xiaogang Luo,Qiuyan Yi,Qiwei Sun,Zhida Xiao,Yan Zhang,Dou Zhang,Chris R. Bowen
The piezoelectric enhancement of photo-catalytic activity for water splitting and pollutant degradation is a novel approach to developing renewable energy and environmental protection applications. Herein, a new form of defect engineered Na-Sm bimetallic-regulated CaBi 2 Nb 2 O 9 platelet is synthesized via a molten salt process for water splitting and pollutant degradation applications. An intermediate band structure is introduced by Sm-doping, and empty orbitals in the conductive band are introduced by Na-doping. These factors, combined with the increased local charge density around the Sm and Na atoms, result in an increased electrical conductivity, improved electron mobility, and provide additional electrons for enhancing catalytic reactions. As a consequence, the judicious co-doping of CaBi 2 Nb 2 O 9 with Sm and Na leads to a unique synergetic piezo-photo-electric effect to provide a superior piezo-photo-catalytic performance for H 2 production (158.53 µmol g −1 h −1 ) and pollutant degradation (rate constant, k = 0.257 min −1 ). This new approach provides important insights into the application of defect engineering to exploit the cooperative doping of alkaline earth metals and rare metals to create high-performance catalysts.
研究领域:
材料科学
·
催化
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环境科学
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能源材料
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固体化学
✓ 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）