DYES AND PIGMENTS
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2024
·
IF 4.1
Kaiwen Lin,Changjun Wu,Shouyi Ming,Difeng Xie,Junhong Lin,Zhiqi Huo,Fangchan Lu,Chaohua Feng,Hao Liu,Hongtao Liu,Jingze Li,Yuehui Wang
In the pursuit of high-performance electrochromic materials, in this paper, six donor-acceptor type with different gradient band gaps electrochromic conjugated polymers, named PBTz-T, PBTz-TT, PBTz-DT, PTBTO8-T, PTBTO8-TT, and PTBTO8-DT, were synthesized via direct (hetero) arylation polymerization, employing two benzothiadiazole derivatives with varying electron-accepting capabilities and three thiophene derivatives with different electron-donating capacities. The structures, optical, electrochemical, and electrochromic properties of the six polymers were investigated. As the number of fused thiophene increases, enhancing the electron-donating ability, a growth trend of electrochemical stability is observed for all polymers. Meanwhile, enhance electron-accepting capabilities of acceptors (from benzotriazole to benzothiadiazole) significantly lower the electronic band gap and improve electrochemical stability. PBTz-DT boasts a bleaching time of 0.3 s, outperforming most reported electrochromic polymers. PBTz-T, at 530 nm, exhibits exceptionally high coloration efficiency, reaching 916 cm 2 C⁻ 1 , and demonstrates higher electron utilization and lower energy consumption, making it an excellent candidate for high-performance electrochromic devices. This work compared studies the relationship of gradient band gaps of electrochromic conjugated polymers and their electrochemical and electrochromic performance, offers new insights into enhancing the electrochemical stability and synthesizing high coloration efficiency electrochromic materials.
研究领域:
材料科学
·
化学
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DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2024
·Vol. 8
·期 1
·1-16
·
IF 23.2
Zhang Zheng,Shen Laifa,Xu Xin,Guo Jun,Liu Yang,Zhang Jie,Zhu Zhen,Xu Jiayi,Ji Dingwei,Kong Zhihan,Wang Jing,Wu Qi,Yan Kang,Liu Jinsong,Zhu Kongjun
In response to the development needs for lightweight and functional aviation electric aircraft, as well as cleaner and sustainable green energy, this study designed a graphene oxide-based carbon fiber structural supercapacitor with integrated structure and energy storage capabilities. It possesses electrical storage stability and meets mechanical load-bearing requirements. We focused on the electrochemical stability of the GO/CF 1 structural supercapacitor under load-bearing conditions. Experimental results showed that capacitance retention was 99.98% over 10,000 cycles, with a coulombic efficiency of 96.27% at 0.1 mA/cm 2 . Under a 30 kPa load-bearing condition, the capacitance retention and coulombic efficiency of the GO/CF 1 structural supercapacitor were approximately 99.58% and 94.34%, respectively, at 0.05 mA/cm 2 over 15,000 cycles. The GO/CF 1 structural electrode exhibited similar morphology and almost the same specific surface area in both unloaded and load-bearing states, elucidating the mechanism behind the stability of its electrochemical properties. Furthermore, the tensile strength and elastic modulus were 139.2 MPa and 8.6 GPa, respectively. This study demonstrated that the GO/CF 1 structural supercapacitor maintains stable electrochemical performance under load-bearing conditions, offering a design solution for optimizing structural energy storage devices in aerospace applications.
研究领域:
材料科学
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航空航天工程
·
能源存储技术
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产品关联
DOI
高影响因子
Battery Energy
·
2024
·
IF 9
Liewu Li,Yizhao Yang,Zhencheng Huang,Tao Huang,Weibin Chen,Xiaoyu Gong,Shenghua Ye,Hao Li,Shaoluan Huang,Wei Xiong,Jing Chen,Hongbin Wang,Xiangzhong Ren,Xiaoping Ouyang,Jionghui Wang,Qianling Zhang,Jiangtao Hu,Jianhong Liu
Silicon (Si) has emerged as a promising anode material in the pursuit of higher energy-density lithium-ion batteries (LIBs). The large-scale applications of Si anode, however, are hindered by its significant swelling, severe pulverization, and continuous electrode–electrolyte reaction. Therefore, the development of an efficient approach to mitigate Si particle swelling and minimize interface parasitic reactions has emerged as a prominent research focus in both academia and industry. Here, a facile and scalable strategy is reported for the preparation of a double-layer coated submicron Si anode, comprising ceramic (silicon oxide) and graphene layers, denoted as Si@SiO x @G. In this approach, SiO x is in situ synthesized on the surface of Si and bonded with graphene through hydrogen bond interactions. The prepared Si electrode shows exceptional structural integration and demonstrates outstanding electrochemical stability, with a capacity retention of 92.58% after 540 cycles at 1 A g −1 , as well as remarkable rate capability, achieving a specific capacity of 875 mAh g −1 at 2 A g −1 . This study presents a straightforward yet pragmatic approach for the widespread implementation of high-energy-density silicon-based batteries.
研究领域:
材料科学
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能源技术
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产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2024
·Vol. 36
·期 36
·2408903
·
IF 27.4
Nini Zhang,Qinsheng He,Lu Zhang,Jing Zhang,Liangfeng Huang,Xiayin Yao
The unique structure and exceptionally high lithium ion conductivity over 10 mS cm −1 of Li 10 GeP 2 S 12 have gained extensive attention in all-solid-state lithium batteries. However, its poor resistivity to moisture and chemical/electrochemical incompatibility with lithium metal severely impede its practical application. Herein, a fluorine functionalized Li 10 GeP 2 S 12 is synthesized by stannous fluoride doping and employed as a monolayer solid electrolyte to realize stable all-solid-state lithium batteries. The atomic-scale mechanism underlying the impact of fluorine doping on both moisture and electrochemical stability of Li 10 GeP 2 S 12 is revealed by density functional theory calculations. Fluorine surface doping significantly reduces surface hydrophilicity by electronic regulation, thereby retarding the hydrolysis reaction of Li 10 GeP 2 S 12 . After exposed to a relative humidity of 35%–40% for 20 min, the ionic conductivity of Li 9.98 Ge 0.99 Sn 0.01 P 2 S 11.98 F 0.02 maintains as high as 2.21 mS cm −1 , nearly one order of magnitude higher than that of Li 10 GeP 2 S 12 with 0.31 mS cm −1 . Meanwhile, bulk doping of highly electronegative fluorine promotes the formation of lithium vacancies in the Li 10 GeP 2 S 12 system, thus allowing stable lithium plating/stripping in Li | Li symmetric batteries, boosting a critical current density reaching 2.1 mA cm −2 . The LiCoO 2 | lithium all-solid-state batteries display improved cycling stability and rate capability, showing 80.1% retention after 600 cycles at 1C.
研究领域:
材料科学
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能源存储技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2018
·
IF 0
Size Zhang,Tao Fu,Jiyang Li,Yueying Peng,Jinbao Zhao
The high price of fuel cells is mainly attributed to the low catalytic efficiency and short working life of the state-of-the-art commercial catalysts for the oxygen reduction reaction. Hereon, a nitrogen-doped mesoporous carbon (NMC) with a roelike shape have been synthesized as the carbon support for the platinum (Pt) catalyst, which has a high specific surface area and pore volume. The doping with nitrogen creates many active sites on the NMC, which can enhance the catalytic activity of the supported Pt nanoparticles. The synthesis of the NMC is simple and reproducible, which uses polydopamine as the precursor and can be conveniently accomplished at room temperature. The Pt nanoparticles loaded on the NMC (Pt/NMC) exhibit a high mass activity (0.9 V vs reversible hydrogen electrode) of 0.384 A mgPt–1 in acidic media, which is 8.1 times of the catalyst using Vulcan XC-72R as the support (Pt/Vulcan) and prepared by the same synthetic process, and 5.9 times of the commercialized catalyst (Pt/C-com, 20 wt %). The Pt/NMC also exhibits a better electrochemical stability. Compared to the severe degradation of the Pt/Vulcan and the Pt/C-com after the accelerated durability test (5000 cycles), the Pt/NMC remained high catalytic activity and electrochemical active surface area, which may be due to the suitable morphology and the influence of nitrogen in the NMC.
研究领域:
材料科学
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电化学
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能源科学
✓ 已验证
DOI
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2021
·Vol. 223
·期 8
·2100338
·
IF 2.527
Chao Qu,Hongzhang Zhang,Changsheng Wang,Xianfeng Li
A membrane with low vanadium ion permeability and excellent electrochemical stability is crucial for a vanadium flow battery (VFB). Herein, a highly stable anion exchange membrane based on a bi-guanidinium crosslinking quaternized poly(arylene ether sulfone) (PSF) is reported. The positively charged guanidinium groups can not only form continuous and smooth ion transport channels but also prevent the mutual penetration of vanadium electrolyte at positive and negative sides, respectively, based on the Donnan exclusion effect. Moreover, the crosslinking structure endows the membrane high mechanical strength to meet the requirements of the harsh environment of VFBs. As a result, the anion exchange membrane fabricated by the poly(arylene ether sulfone) crosslinked with bi-guanidinium (BG-PSF) shows an impressive VFB performance with a coulombic efficiency of 99.8% and an energy efficiency of above 85.8% at a current density of 80 mA cm −2 , which is much higher than that of Nafion115. Furthermore, this battery can continuously work for over 200 cycles at a current density of 80 mA cm −2 , indicating good stability of the membrane. Therefore, the rationally designed BG-PSFs are promising for VFB applications.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
Functional Materials Letters
·
2021
·
IF 2.17
Tingfang Yan,Lei Zhu,Yongmin Wu,Jingxiong Gao,Wensheng Tian,Weiping Tang
Solid polymer electrolytes such as poly(ethylene oxide) (PEO) are desirable in lithium batteries due to their high safety and excellent flexibility. However, low ionic conductivity and electrochemical stability of PEO hamper their applications. In this work, succinonitrile (SN) is added to the composite solid electrolyte (CSE) composed of PEO matrix and Li 6 . 4 La 3 Zr 1 . 4 Ta 0 . 6 O 1 2 filler to improve its ionic conductivity and electrochemical stability, thereby matching with ternary cathode materials. The results reveal that the ionic conductivity of CSE at 55 ∘ C can be increased by more than one order of magnitude with the addition of SN. And the CSE membrane containing 6 wt.% SN (CSE-6) exhibits the best electrochemical stability, which has improved the electrochemical window from 4.83 to 5.26 V. Compared with blank sample without the additive, the specific capacity of LiNi 0 . 5 Co 0 . 2 Mn 0 . 3 O 2 /CSE-6/Li is increased from 15.6 to 154 mAh ⋅ g − 1 , and exhibits relatively optimal cyclic stability in a range of solid-state batteries with different SN contents. It is expected that the results of this study will provide a reference for the application of PEO-based CSEs in high-voltage solid lithium batteries.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Shumin Wang,Yi Zhang,Xiaoyang Deng,Zizai Ma,Hefeng Yuan,Jinping Li,Xiaoguang Wang
The development of non-precious and high-efficient electrocatalysts to enhance the activity and stability in alkaline media is impending for massive hydrogen and oxygen production. In this study, NiS 2 nanoparticles array with ellipse-like topography was fabricated via simple hydrothermal and sulfurization treatment. The NiS 2 -400 featured with the unique loose stacking topographic architecture contributes to more exposed active sites, the smaller contact resistance between electrode/electrolyte, faster ion diffusion and electron transfer . As a result, NiS 2 -400 electrode requires only overpotentials of 116 and 178 mV to drive current densities of 10 and 50 mA cm −2 in 1.0 M KOH towards the hydrogen evolution reaction (HER), coupled with a Tafel slope of 93.0 mV dec −1 . Moreover, the resultant NiS 2 -400 nanoparticles exhibit excellent electrochemical stability for more than 50 h. In addition, the density functional theory (DFT) calculation further confirms that the (200) facet acts as the predominant active site, contributing to the enhanced HER performance.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2018
·
IF 6.945
Wenping Zha,Fei Chen,Dunjie Yang,Qiang Shen,Lianmeng Zhang
In this work, the scalable ceramic-polymer composite electrolytes composed of Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 , poly (ethylene oxide), lithium bis(trifluoromethane)sulfonimide, and solid plasticizer succinonitrile are prepared in the form of flexible membranes. The ionic transport properties, electrochemical stability, and interfacial behaviors against lithium electrode of this electrolyte are systematically investigated. Among these electrolytes, the sample containing 60 wt.% Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 and 10 wt.% succinonitrile presents a maximum conductivity of 1.22 × 10 −4 S cm -1 at 30 °C, and exhibits a broadened electrochemical stability window of 5.5 V vs. Li/Li + . Moreover, the ionic transference number of this electrolyte is improved to 0.41, and the interfacial compatibility against lithium electrode is excellent under both static and dynamic conditions. Excellent cycling and rate performance of the Li/LiFePO 4 cells are resulted from the enhanced ionic transport properties and improved interfacial contact between electrolyte and electrodes. The cell run at 0.5C delivers a discharge specific capacity of 151.1 mAh·g −1 after 200 cycles under 60 °C, and retains 98% of the maximum specific capacity. Notably, this cell also can be successfully charged and discharged at 45 °C and still delivers a discharge capacity of 124.1 mAh·g −1 after 70 cycles at 0.5 C.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Linna Dong,Xingfa Zeng,Jifang Fu,Liya Chen,Jia Zhou,Sanwei Dai,Liyi Shi
PEO-based solid electrolytes have attracted great attentions and made rapid development in the fields of lithium ion batteries, however its low ionic conductivity and low lithium ion transference number at ambient temperature prevent its practical applications. Herein we report a novel freestanding crosslinked ionic copolymer solid electrolytes fabricated via cross-linking polytetramethylene ether glycol with 1-vinyl-3-butylimidazole bis(trifluoromethylsulfonyl)imide ionic liquid. Polytetramethylene ether glycol is chosen to build polymer matrix owing to their loose coordination with lithium ions and vinyl imidazolium ionic liquids provide ionic species. As expected, the novel electrolytes exhibit lithium-ion transference number ( t Li+ ) up to 0.47 at ambient temperature, good electrochemical stability up to 5.1 V and stable interface compatibility. Furthermore, the lithium ion batteries assembled with lithium anodes and LiFePO 4 cathodes exhibit good cycling performance and rate performance, delivering a good discharge capacity of 154.3 mAh g −1 after 100 cycles at 0.1C and an initial discharge capacity of 137.6 mAh g −1 at 0.5C with capacity retention of 92% after 100 cycles at ambient temperature.
研究领域:
材料科学
·
能源技术
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 12
·6832-6839
·
IF 10.733
Yinghua Zhu,Jiang Cao,Hong Chen,Qipeng Yu,Baohua Li
Polymer electrolytes have attracted great attention due to their promising abilities, however, only on further improving their safety and electrochemical performance can they be used as next generation electrolytes. Here, a novel composite polymer electrolyte (CPE) with nano-SiO2 acting as a cross-linking agent to form a 3D cross-linked network was synthesized to improve the electrochemical stability and mechanical ability. The novel CPE exhibited some excellent properties such as high ionic conductivity (4.65 × 10−3 S cm−1 at room temperature) with a broad electrochemical stability window (∼5.4 V vs. Li/Li+), high ionic transfer number (0.45), high mechanical robustness and flexibility (Young’s module ∼8.9 MPa, breaking strain 181%), and excellent interface stability. The lithium metal battery LiFePO4/CPE/Li was assembled and delivered a specific capacity of 160 mA h g−1 with a capacity retention of above 90% after 500 cycles at 1C. Furthermore, to cooperate with high voltage cathode materials LiNi0.8Co0.1Mn0.1O2 and LiNi0.5Mn1.5O4, the novel CPE still delivered superior cycling performance compared to traditional electrolytes.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2018
·Vol. 411
·期 19
·4577-4585
·
IF 3.307
Mei Yihong,Zhong Changyin,Li Ling,Nong Jinpeng,Wei Wei,Hu Weihua
Surface plasmon resonance (SPR) employs a gold (Au) thin film (ca. 50 nm in thickness) chip to generate a surface plasmonic wave (SPW) for in situ monitoring of the interface/surface, which makes it intrinsically compatible with electrochemistry for combined electrochemical surface plasmon resonance (EC-SPR) investigations. However, conventional SPR Au chips suffers from a high background signal, narrow electrochemical window, and limited electrochemical stability. Presented in this work is a novel SPR chip composed of the Au/long-chain alkane thiol self-assembled monolayer/single-layer graphene (Au/SAM/G) sandwich architecture to address these problems. On this chip, the single-layer graphene serves as a working electrode for electrochemical measurement, and the underlying Au film serves as the SPW support for SPR monitoring; the sandwiched thiol monolayer enables the electrical separation of the graphene and Au film to protect the Au film from electrochemical polarization. Our experiment indicates that the electrochemical window of such a chip extends beyond the hydrogen/oxygen evolution reaction potential on Au with significantly improved electrochemical stability and suppressed background signal. Moreover, its intrinsic SPR sensitivity is completely reserved even compared to that of the conventional SPR Au chip. This Au/SAM/G chip may offer a valuable solution to the EC-SPR investigations in harsh conditions.
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研究领域:
材料科学
·
分析化学
✓ 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）