PROGRESS IN ORGANIC COATINGS
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2025
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IF 7.3
Chaonan He,Hongyan Wang,Lulu Wang,Song Xue
The utilisation of lithium metal electrodes in high-energy-density rechargeable batteries is impeded by two crucial obstacles: the low mobility and thermal stability of polyolefin separators. Aiming at the structural defects of traditional polyolefin separators, this study proposes a surface functionalization modification strategy based on anionic or cationic surface modified silica nanoparticles. The surface grafting reaction induced by the silane coupling agent has been demonstrated to be an effective method for the construction of sulfonic acid (-SO 3 H) and amino (−NH 2 ) functional groups on the surface of silica nanoparticles. The resultant functionalised nanoparticles (SiO 2 -SO 3 H/SiO 2 -NH 2 ) have been shown to possess ion selectivity. Furthermore, based on the self-polymerization characteristics of dopamine, a uniform polydopamine (PDA) interface layer was constructed on the surface of polypropylene (PP) separator to improve the hydrophilic properties of polyolefin separator. Subsequently, the functionalized ionic silica particles were loaded on the surface of PDA modified PP separator by impregnation method, and the effects of different functional groups on the performance of separator and battery were systematically studied. The results showed that the wettability and flame retardancy of PP separator grafted with -SO 3 H group surpassed those of the pristine PP separator and -NH 2 group modified system. Notably, the -SO 3 H modified separator exhibits exceptional electrolyte absorption (>200 %) and a remarkably low contact angle (12.6°), while concurrently attaining a lithium ion transference number (t Li + ) of up to 0.77. In the LiFePO 4 ||Li battery system, the separator can output a discharge specific capacity of 161 mAh g −1 at 1C rate, which is 12.3 % higher than that of the unmodified PP separator (142.5 mAh g −1 @ 1C, LiFePO 4 ||Li). In addition, the battery assembled by the sulfonic acid-modified separator has a content retention rate of >95 % after 300 cycles, showing excellent rate performance and cycle stability. This synergistic strategy based on interfacial anion and cation functionalization and nanoparticle composite modification provides an innovative technical path for the development of lithium battery separators with high lithium ion migration and thermal safety.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2017
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IF 6.395
Yonghuan Ren,Ziqun Yu,Guangji Song
Battery thermal management (BTM) system plays a key part in vehicle thermal safety. A novel method employing water evaporation is presented in this paper. The thin sodium alginate film (SA-1 film) with water content of 99 wt% is prepared using a simple spraying method, and is attached on the surface of battery pack to explore its effectiveness on preventing heat accumulation. The result shows that under the condition with constant current charge/discharge larger than 1 C, the temperature rise rate is reduced by half. Under the condition with the New Europe Drive Cycle, the temperature could maintain stable without obvious rise. Moreover, a simple water automatic-refilling system is designed to address the dry issue of the film in terms of evaporation elimination. The proposed SA-1 film BTM system shows to be a very convenient and efficient approach in handling the thermal surge of Li-ion batteries without any change in battery pack integration and assembly.
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
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2020
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IF 7.216
Ting Chen,Dewu Zeng,Long Zhang,Meng Yang,Dawei Song,Xinlin Yan,Chuang Yu
As a type of candidate for all-solid-state Li batteries, argyrodite solid electrolytes possess high ionic conductivity , but poor compatibility against Li metal. Here, we report novel Li 6 PS 5 I-based argyrodite sulfides with Sn-O dual doping , which is a powerful solution to comprehensively improve the performance of a material. The combination of O and Sn-aliovalent doping not only enables an improved ionic conductivity but more importantly realizes an intensively enhanced interfacial compatibility between argyrodite and Li metal and Li dendrite suppression capability. The assembled battery with Sn-O dual-doped electrolyte and Li anode demonstrates high capacity and decent cycling stability. Dual doping is thus believed to be an effective way to develop high performance sulfide solid electrolytes.
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·Vol. 11
·期 1
·498-505
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IF 1.5
Jian Lu,Jianling Li,Zhixun Zhu,Yuguang Zhao,Cheng Chen,Feiyu Kang
Porous Co 3 Mo 3 N nanorods were prepared by hydrothermal process combined with ammonia annealing and applied as catalyst in Li-O 2 battery cell. The battery with the porous Co 3 Mo 3 N nanorods showed a higher initial discharge capacity of 7902.8 mAh/g c at current density of 100 mAh/g c than that with the pure Ketjen black. Moreover, the Co 3 Mo 3 N-based electrode displayed lower overpotential and better cycling performance than that of the carbon-only cathode. Such performance can be associated with the synergistic effects of high electrocatalytic activity and porous structure of the Co 3 Mo 3 N nanorods.
研究领域:
材料科学
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电化学
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储能
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纳米材料
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催化
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2024
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IF 4.1
Guangyue Shen,Shunpeng Zhang,Xingyan Li,Yujun Fu,Xiang Li,Jiandong Jiang,Zhenli Wen,Qi Wang,Deyan He
Artificial vision systems have been extensively reported for processing unstructured data, performing pattern recognition, and performing visual simulations. Photonic synapses have become the core of most artificial vision systems due to their advantages such as low energy consumption and ultra-fast signal transmission. However, their integration is difficult, the integration difficulty of photon synapses is higher than that of crossbar arrays. Moreover, due to the hybrid drive of light and external power supply, low energy consumption and weight update under full optical control cannot be achieved. Here, we designed a fully light-controlled multifunctional artificial vision reflex arc system. The solar cell and oscillator generate presynaptic voltage signals that are then transmitted to a lithium-ion-based memristor for the stimulation of different wavelengths and light intensities. The results show that our artificial vision system can distinguish wavelength and light intensity information and has good weight update symmetry and repeatability. Finally, the deformation experiment of the shape memory alloy demonstrated that the system can be used for controlling artificial muscles under different light signals.
研究领域:
光电子学
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神经形态工程
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人工智能
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智能材料
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光子计算
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
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2020
·
IF 8.758
Waquar Ahmed Khokhar,Ning Zhao,Weilin Huang,Hao Wang,Zhijie Bi,Xiangxin Guo
Solid-state batteries with alkali metals (Li, Na, etc.) as anodes have the potential to achieve high energy density. However, the Li penetration through the garnet occurs without preindication during electrochemical cycling, leading to sudden short circuit and safety concerns. Various improvement strategies are developed but such a problem still exists when the current density exceeds the critical value. In contrast, the electrochemical Na plating/stripping on the β″-alumina ceramic electrolyte (BASE) has been explored with improved interfacial contacts by introducing an Au intermediate layer. When being cycled around the critical current density, the polarization potential of the Na/Au/BASE symmetric cells increases progressively until it stabilizes at a certain value without the sudden short circuit. It is revealed that the increasing polarization originates from a gradual Na penetration into the BASE ceramics from the interface and the subsequent stable cycles correlate with the formation of a sustainable Na/Au/BASE interface. These results disclose the difference in a growth model of metal filaments through Li and Na solid electrolytes, shedding new light on understanding of the metal penetration in solid electrolytes.
研究领域:
材料科学
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电化学
·
储能
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Kaixin Yu,Ji Qian,Fujie Wang,Xingming Guo,Li Li,Feng Wu,Renjie Chen
Lithium metal batteries (LMBs) are considered one of the most attractive high-specific energy storage devices. However, their popularization and application are plagued by the uncontrollable lithium deposition and unlimited volume expansion of lithium metal anodes during the repeated depositing/stripping. Here, we load a metal–organic framework (ZIF-67) on a three-dimensional (3D) flexible melamine sponge (MS) through a liquid phase reaction to prepare a MS with ZIF-67 nanoparticles (MSZ). The unique MSZ interlayer can offer accommodation space for “hostless” lithium; the specific pore structure and polar chemical structure of the MS/ZIF-67 work together to guide uniform lithium deposition. The Li–Cu cells with the MSZ interlayer exhibit remarkable electrochemical performance with a small voltage hysteresis less than 105 mV beyond 250 cycles (5 mA cm–2), and the high Coulombic efficiency remains over 98% after 700 cycles at 1 mA cm–2. Even at an extremely high current density of 10 mA cm–2, this enhancement is achieved. The introduction of the MSZ interlayer into Li/LiFePO4 cells enhances their cycling performance with a reversible specific capacity of 99.7 mAh g–1 over 1000 cycles at 1C. Our work provides new ideas for stable high-specific energy lithium metal batteries.
研究领域:
储能
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材料科学
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电化学
·
锂电池
✓ 已验证
DOI
高影响因子
JOURNAL OF THE CHINESE INSTITUTE OF ENGINEERS
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2022
·
IF 1.107
Zheng Jin,Suihan Cui,Cuiqing Jiang,Tijun Li,Chao Yang,Zhongzhen Wu
Reaction polarization of the Li(NixMnyCoz)O2 (NMC) cathode materials can be significantly alleviated by depolarization and pre-lithiation, which respectively produce electrolyte protective layer and double-layer lithium structure. These structures can not only prevent Ni ions from dissolution but also increase the discharge capacity. However, as the size of the regular NMC particles is relatively large, the effect of depolarization and pre-lithiation is not significant. This work tries to prepare NMC with nanoscale structure and high specific surface area by electrospinning, and studies the effect on NMC morphology caused by calcination atmosphere, oxidation temperature, decarburization temperature and calcination temperature. It is hoped that the polarization can be further eliminated by optimizing the size, and the proportion of double-layer lithium formed in the pre-lithiation can be increased. The results reveal that after several steps including pre-oxidation at 200°C, decarburization at 550°C and calcination at 750°C, nano lamellar structures with size of about 1–3 μm and thickness of about 30 nm can be produced under O2 flow of 200 SCCM. NMC with nano lamellar structures will further alleviate the polarization and produce a higher proportion of double-layer lithium structure by pre-lithiation, resulting in a significant improvement of the discharge capacity.
研究领域:
材料科学
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电化学
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储能技术
·
纳米材料
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2015
·
IF 2.353
Ke Wang,Wenlin Feng,Xu Feng,Yao Li,Peng Mi,Shasha Shi
Zn 0.997 WO 4 : Pr 3 + 0.003 and different concentrations (0.1 mol% to 0.9 mol%) of Pr, Li co-doped ZnWO 4 red phosphors were prepared by means of solid-state reaction process. The crystalline, surface morphology and luminescent properties of Zn 0.997 WO 4 : Pr 3 + 0.003 and Zn 1 − x − y WO 4 : x Pr 3 + , y Li + phosphors were investigated by the X-ray diffraction patterns (XRD), scanning electron microscope (SEM) and fluorescent measurements. From powder XRD analysis, the formation of monoclinic structure with C 2 / h point-group symmetry and P 2 / c space group of the as-synthesized samples is confirmed. The SEM image showed that surface morphology of the phosphor powder is irregular cylindricality. The luminescent spectra are dominated by the red emission peaks at 607, 621 and 643 nm, respectively, radiated from the 1 D 2 → 3 H 4 , 3 P 0 → 3 H 6 and 3 P 0 → 3 F 2 transitions of Pr 3 + ions. The concentrations of the highest luminescent intensity is determined at 0.3 mol% Pr 3 + and 0.3 mol% Li co-doped ZnWO 4 powder crystal, and the peak intensity is improved more than 3 times in comparison with that of 0.3 mol% Pr 3 + single-doped ZnWO 4 . The enhanced luminescence comes from the improved crystalline and from the charge compensation of Li + ions. The decay curve and CIE chromaticity coordinates of as-prepared samples are also studied in detail.
研究领域:
材料科学
·
发光材料
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固态化学
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光学材料
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荧光粉技术
✓ 已验证
DOI
高影响因子
NATURE
·
2026
·
IF 56.1
Liu Lei,Xiang Yuxuan,Lu Xingyu,Wang Jianhui
Anode-free lithium metal batteries (AFLMBs), which are manufactured without anode active material, offer great potential for high-energy-density, low-cost energy storage. However, AFLMBs face a long-standing challenge of short lifespan due to the harsh conditions of lacking excess Li-resource and an anode host 1-8 . This issue is associated with uneven Li deposition/dissolution, rooted in the micro-heterogeneity and mechanical fragility of solid electrolyte interphase (SEI) 9 . Here we report a practical 500 Wh kg –1 -level AFLMB with enhanced lifespan, achieved using a crossover-coupled electrolyte. The electrolyte triggers crossover-coupled interfacial reactions that generate a B–F-based polymer-rich SEI at the anode while suppressing gas evolution at the cathode. The resulting SEI exhibits sub-nanometer homogeneity, high flexibility, and rapid Li-ion transport, and it spontaneously develops a self-adaptive mesh-film structure that ensures uniform ion flux and large-volume-change accommodation, thereby realizing reversible planar Li deposition/dissolution of 5.6 mAh cm –2 . Consequently, a 2.7 Ah AFLMB (508 Wh kg –1 , 1668 Wh L –1 ) without any host-material coating demonstrates stable cycling for 100 cycles at 100% depth of discharge (DoD) and 250 cycles at 80% DoD, with 80% capacity retention and a high-power output of 2650 W kg –1 at 96 Wh kg –1 . These findings establish crossover-coupled interphase chemistry and address the inherent structural instability of host-free electrodes, advancing the practical implementation of AFLMBs.
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2022
·
IF 4.654
Yujie Wang,Mingyu Zhang,Yuxuan Zhang,Yafeng Wang,Wenxin Liu,Chujie Yang,Veniamin Kondratiev,Feixiang Wu
Metal fluoride–lithium batteries have been viewed as very promising candidates for next-generation rechargeable batteries with higher energy densities. However, the intrinsic insulating properties of metal fluoride cathode lead to the poor reaction kinetics and unsatisfactory electrochemical performance. Herein, a honeycombed CoF2@C nanocomposite with a high specific surface area up to 180.4 m2 g–1, in which the nanosized CoF2 particles with size of 5–25 nm are evenly embedded in the honeycombed carbon framework, is prepared by the low-temperature fluorination of honeycombed Co@C nanocomposite precursor. As expected, the as-produced CoF2@C nanocomposite can deliver a high-capacity utilization of 365 mAh g–1 and an average capacity retention of 81.9% over 300 cycles at a current density of 110 mA g–1, as well as a reasonable capacity of 205 mAh g–1 at 1100 mA g–1. Such excellent electrochemical performance is due to the unique configuration that achieves the nanoconfinement of conversion reaction in the metal fluoride cathode. To be specific, on the one hand, the honeycombed structure provides uniformly isolated nanospace to inhibit the volume expansion and product agglomeration in the conversion reaction. On the other hand, the excellent reaction kinetics is attributed to the three-dimensional electron and ion conduction pathway, that is, the electrons are conducted through the honeycombed carbon walls, while Li+ are transferred via the interconnected honeycomb channels, facilitating the high-capacity utilization.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Zhunzhun Ma,Weixin Qian,Haitao Zhang,Hongfang Ma,Qiwen Sun,Weiyong Ying
Fischer–Tropsch-to-Olefins (FTO) over iron-based catalysts is a promising process for the production of light olefins from a non-petroleum source. However, the catalytic mechanism is unclear because of the variation in the iron phase during the reduction and activation processes and the complex iron phase composition under the reaction conditions. A series of Li-promoted FeMnMgO x catalysts is synthesized using co-precipitation and impregnation methods, after which the effect of promoters on the evolution of the iron phase, chemisorption, and FTO performance are analyzed. The results demonstrate that Mg enhances dissociative CO adsorption and hydrogen adsorption, improving the FTO activity. Mg facilitates the dispersion of α-Fe 2 O 3 and suppresses the carbonization , which weakens the chain propagation, encourages the formation of short-chain hydrocarbons, and increases the selectivity of light olefins . Li also enhances dissociative CO adsorption and increases CO conversion. Moreover, Li facilitates the formation of the ε'-Fe 2.2 C phase, which reveals a higher FTS activity and better C–C coupling ability than the χ-Fe 5 C 2 phase. This results in a decrease in CO 2 and increase in light olefins . At the optimal Li loading, the FeMnMg-0.75Li sample displays the highest space time yield of light olefins at 355 g/(kg cat ·h).
研究领域:
化学工程
·
催化
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）