Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 12
·6832-6839
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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
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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
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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
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Sustainable Energy & Fuels
·
2022
·Vol. 6
·期 19
·4528-4538
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IF 6.813
Dong Han,Zongchen Zhao,Wei Wang,Hongjie Wang,Huanlei Wang,Lili Zheng,Jing Shi,Xichao Li
Solid polymer electrolytes (SPEs) have proved to be good alternatives to liquid electrolytes. However, their application is severely restricted by low ionic conductivity and poor mechanical strength. Here, NH2-MIL-125 metal–organic frameworks (MOFs) are selected as additives to optimize the poly (ethylene oxide) (PEO)-based SPEs. Compared with PEO-LiTFSI electrolyte (PE), the prepared PEO-LiTFSI-10% NH2-MIL-125 MOF electrolyte (PEM10) not only enhanced the ionic conductivity (3.4 × 10−3 S cm−1 at 80 °C), but improved the stability of the electrochemical window and lithium-ion transference number (tLi+). The assembled Li/PEM10/LiFePO4 battery exhibited a specific discharge capacity of 162 mA h g−1 and superior rate capability of up to 1 C. The assembled Li/PEM10/Li battery showed a stable low-potential cycle for 600 hours at a current density of 0.1 mA cm−2. These results demonstrate that such a novel electrolyte membrane with excellent performance could be considered as a promising MOF-based SPE for all-solid-state batteries.
研究领域:
材料科学
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能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2024
·Vol. 30
·期 12
·8129-8145
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IF 2.4
Wang Qiqi,Zhang Jingchun,Chen Haoyuan,Zhang Yilin,Wang Ying,Zhao Huimin,Zhu Yu,Wang Guowei,Zhuang Linghua
Ionic liquids (ILs) represent a suitable category of electrolytes in new energy batteries and supercapacitors. Although mono-cation ionic liquids have been extensively studied, the electrochemical properties of Gemini ionic liquids (GILs) have not been thoroughly explored. In this study, GILs containing functional hydroxyl group in spacer chain and different alkyl chain in imidazolium cation were synthesized. The physicochemical properties, including melting point, density, thermogravimetric (TGA) analysis, electrical conductivity (EC), molar electrical conductivity, and electrochemical stability window (ESW) of GILs, were evaluated. The introduction of hydroxyl group on spacer chain enhanced the melting point and ESW, while decreased the density, EC, and the thermal stability of bis(trifluoromethyl sulfonyl)imide (TFSI)-based GILs. ESW of TFSI-based GILs increased as the length of alkyl chain changed from methyl to butyl. TFSI-based GILs showed wider ESW than those of Gemini imidazolium bromide salts. Density functional theory (DFT) was used to study the relationship between the change of structure (hydroxyl group in spacer chain, alkyl chain length, and anions) and ESW values of GILs. These results will shed light on potential application of TFSI-based GILs in batteries as lithium-ion or supercapacitors as electrolytes.
研究领域:
物理化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2020
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IF 8.247
Ning An,Zhuhang Shao,Zhen Guo,Jiao Xin,Yuanyuan He,Liwen Lv,Kefeng Xie,Xiuyan Dong,Yang Zhang,Zhongai Hu
In this work, we select a novel multi-redox poly (1, 5-diaminoanthraquinone) (PDAAQ) as electroactive material and Cetyltrimethylammonium bromide (CTAB) modified graphene oxide (CGO) as conductive substrate. Benefit from the excellent dispersion of CGO in organic polymerization medium and the abundant functional groups on the surface of CGO, 1, 5-diaminoanthraquinone (DAAQ) monomers may covalently graft on the conducting substrates and realize the directional growth of PDAAQ via the in-situ chemical oxidative polymerization. In three-electrode system, the optimization of PDAAQ/CGO electrode exhibits a high specific capacitance of 760 F g −1 at 1 A g −1 and superior electrochemical stability of 90.4% after 10 000 cycles. Most importantly, the electrochemical kinetic behavior of PDAAQ/CGO electrode is studied in detail. The result indicates that the energy storage process of PDAAQ/CGO is a synergistic result of diffusion-controlled process and capacitive effects, and the latter one is dominant. According to the simulation calculation of kinetic model , the capacitive contribution ratio of PDAAQ/CGO can be as high as 80.6% at a scan rate of 50 mV s −1 . Finally, the as-fabricated asymmetric supercapacitor (ASC) can deliver an energy density up to 41.1 W h kg −1 at a power density of 1000 W kg −1 , indicating a great potential application in high performance supercapacitors .
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Yusi Lei,Guangyuan Du,Yuruo Qi,Yubin Niu,Shujuan Bao,Maowen Xu
The irreversible consumption of active sodium in sodium-ion full-cells (SIFCs) becomes particularly serious due to the existence of unavoidable interface or side reaction, which has become the key to restrict the development of high-performance sodium-ion batteries (SIBs). Interface design and electrolyte optimization have been proved to be effective strategies to improve or solve this problem. In this work, on the basis of traditional organic liquid electrolytes, a novel gel polymer electrolyte with high ionic conductivity (1.13 × 10 -3 S cm −1 ) and wide electrochemical stability window (~4.7 V) was designed and synthesized using bacterial cellulose film as precursor. Compared with the liquid electrolyte, the obtained electrolyte can endow better sodium storage performance in both half- and full-cells. When coupled with sodium hexacyanoferrate cathode and hard carbon anode, a capacity of 94.2 mA h g −1 can be obtained with a capacity retention of 75% after 100 cycles at a current density of 100 mA g −1 , while those of with conventional liquid electrolyte can deliver a capacity of 99.0 mA h g −1 but only accompany 58% capacity retention under the same conditions. Significantly, when the current density increases to 800 mA g −1 , their capacity difference reaches 23.4 mA h g −1 .
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 5
·2518-2528
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IF 11.301
Yang He,Jiaying Wang,Yunfeng Zhang,Shikang Huo,Danli Zeng,Yun Lu,Zhihong Liu,Deli Wang,Hansong Cheng
Lithium metal is a potential candidate for next-generation anode materials. However, the practical application of a lithium metal anode has been hindered by uncontrolled dendrite formation. Herein, a cost-effective single lithium ion conducting polymer electrolyte membrane based on a highly porous lithium sulfonated polyether ether ketone electrospun nanofiber membrane (es-LiSPCE) is designed to serve as both a separator and a lithium ion conductor. Impregnation of the ethylene carbonate (EC)/dimethyl carbonate (DMC) (v/v = 1 : 1) solvent mixture and 1 M LiFP6 in EC/PC (v/v = 1 : 1) yields gel pure es-LiSPCE and es-LiSPCE/1 M LiFP6 in an EC/PC (v/v = 1 : 1) membrane, respectively, which display high ionic conductivity, low interfacial compatibility and a high lithium ion transference number. Combined scanning electron microscopy (SEM) images and the long-term stripping/plating cycling test of lithium foil confirm that such a membrane is greatly favorable for inhibiting the formation of a concentration gradient and thus suppressing lithium dendrite growth. In addition, the fully aromatic polyether ether ketone backbone enables high thermal dimensional stability and high polarity and high polarity enables fast electrolyte wetting of the es-LiSPCE membrane. Notably, Li/LiFePO4 cells fabricated using es-LiSPCE membranes demonstrate promising rate capacity at 6C, and excellent electrochemical stability for 1500 cycles even at 6C. Therefore, it is believed that such an electrolyte can serve as an alternative to conventional polyolefin-based separators for high energy density lithium metal batteries.
研究领域:
材料科学
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能源存储技术
✓ 已验证
DOI
高影响因子
Science China-Chemistry
·
2024
·Vol. 67
·期 10
·3320-3327
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IF 10.4
Shen Jian-Qiang,Zhao Tian-Tian,Song Ying-Li,Zhang Lingjuan,Gao Ya-Nan,Cui Xiao-Nan,Zhao Peng,Zhang Xian-Ming
Metal-organic nanosheets (MONs) as a novel material with tunable pore structures and low mass transfer resistance, have emerged as molecular sieves for the separation of gases and liquids. In theory, they can also serve as ion sieves for lithium metal batteries (LMBs), realizing the high-energy and dendritic free LMBs. However, there are rarely relevant reports, because it is difficult to simultaneously balance efficient ion sieving ability, high ion passing rate and high electrochemical stability. Here, we synthesized a stable ultrathin MON [Zn 2 (Bim) 4 ] ( [ Zn 2 (Bim) 4 ] Nanosheet, HBim = benzimidazolate), which can achieve both efficient lithium ion sieving ability, high lithium ion passing rate and high electrochemical stability at the same time. The separator assembled by this MON exhibits high Li + transfer number of 0.81 due to the accurate lithium ion and anion/solvent separation. The battery containing such separator shows high lithium ionic conductivity of 0.74 mS cm −1 and low activation energy of 0.099 eV, which can be attributed to the nanometer level thickness and the ion sieving effect. What is more, we realized the application of MONs-based ion sieves in LMBs with intercalation cathodes for the first time. And the LiFePO 4 ∣Li battery with as-assembled separator demonstrates improved Coulombic efficiency (> 99%) and significantly extended cycling life (> 1600 cycles) with 80% capacity retention.
研究领域:
材料科学
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电化学
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能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
·
IF 4.6
Guowei Yang,Ji Qi,Jie Tian,Hao Liu,Kaiqi Xu,Yong Yi,Guobin Zhong,Peng Guo
Halide solid electrolytes have become the core enabling material for solid-state battery systems due to their excellent properties, leading the next generation of energy storage technology innovation. This system inherits the mechanical flexibility of sulfide electrolyte and the electrochemical stability of oxide electrolyte, and achieves a wide electrochemical window while breaking through the bottleneck of room temperature ionic conductivity of the polymer electrolytes. Despite the unique advantages demonstrated by halide electrolytes systems, there are still significant technical bottlenecks in their commercial application. Herein, we report a reasonably designed indium halide electrolyte material with high ionic conductivity and low ionic migration barrier of 1.53 × 10 −3 S cm −1 at 25°C. The symmetrical cells constructed based on this method can exhibit 250 h of long cycle stability at 0.4 mA cm −2 with 0.4 mA h cm −2 . Especially noteworthy is that the Li 3 InCl 6 shows high stability in air. These breakthrough characteristics make it an ideal electrolyte material candidate for constructing high energy density all-solid-state lithium batteries.
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
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Rong-Ao Tong,Linhui Chen,Gang Shao,Hailong Wang,Chang-An Wang
With the increasing demand for higher energy density Lithium-ion batteries, the battery safety issue has gained growing attention. Solid-state electrolytes (SSEs) are considered a promising solution to the volatilization and inflammable problems of the traditional liquid electrolytes . In this work, we propose a novel solvent-free modification process using stearic acid as a modifying agent for LLZTO/PEO hybrid electrolytes. Compared to the conventional solvent-casting process, the new one integrates surface modification and composite in a successive solvent-free step, so it can greatly improve the process efficiency and meet the requirement of green chemistry. Fourier Transform Infrared spectrometry (FTIR), X-Ray Diffraction (XRD) and Transmission Electron Microscope (TEM) observation confirm the structure of the uniform coating layer . The solvent-free modification and composite process are proved to significantly inhibit the agglomeration of LLZTO particles and the side reactions on particle surfaces in the polymer matrix by using Scanning Electron Microscope (SEM) and Thermal Gravimetric-Differential Thermal Analysis (TG-DTA) characterization. Thus, the prepared electrolyte has the ionic conductivity of up to 8.3 × 10 −4 S cm −1 at 70 °C. It has better electrochemical stability as well, which can achieve about 900 cycles in Li symmetric cells with a current density of 0.1 mA cm −2 .
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
Small
·
2023
·Vol. 19
·期 22
·2208234
·
IF 13.3
Qingchao Fan,Hongwei Fan,Kerui Li,Chengyi Hou,Qinghong Zhang,Yaogang Li,Hongzhi Wang
Stretchable electrochromic (EC) devices that can adapt the irregular and dynamic human surfaces show promising applications in wearable display, adaptive camouflage, and visual sensation. However, challenges exist in lacking transparent conductive electrodes with both tensile and electrochemical stability to assemble the complex device structure and endure harsh electrochemical redox reactions. Herein, a wrinkled, semi-embedded Ag@Au nanowire (NW) networks are constructed on elastomer substrates to fabricate stretchable, electrochemically-stable conductive electrodes. The stretchable EC devices are then fabricated by sandwiching a viologen-based gel electrolyte between two conductive electrodes with the semi-embedded Ag@Au NW network. Because the inert Au layer inhibits the oxidation of Ag NWs, the EC device exhibits much more stable color changes between yellow and green than those with pure Ag NW networks. In addition, since the wrinkled semi-embedded structure is deformable and reversibly stretched without serious fractures, the EC devices still maintain excellent color-changing stability under 40% stretching/releasing cycles.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Zilong Su,Mengyuan Jin,Chunxi Hu,Ran Liu,Renbing Wu,Deliang Xu,Yanhui Guo
Developing practical solid electrolytes is a tough challenge and an urgent necessity for future cell applications. The Na2B12H12 solid electrolyte (SE) is considered as one of the most promising candidates due to its high stability, excellent alkali metal compatibility, low density, and safe properties. However, its inherent low ionic conductivity at room temperature and narrow electrochemical stability window (ESW) limit its development. Herein, a simple method of ball milling Na2B12H12 in an oxygen atmosphere has been developed, which can significantly increase the ionic conductivity by 3 orders of magnitude and broaden the ESW. Distinctively, high ionic conductivity (1.3 × 10–3 S cm–1), wide ESW (5.2 V), favorable thermal stability (>300 °C), and good electrode adaptability have been achieved by an oxidized Na2B12H12-20 wt % SiO2 composite. The Na3V2(PO4)3O2F/oxidized Na2B12H12-20 wt % SiO2/Na cell shows a specific capacity retention of 83.7% after 100 cycles at 0.1 C and a specific capacity of 49.1 mAh g–1 at 2 C. Hence, the oxidized Na2B12H12 SE proposed in this study has the potential to function as a practical material for all-solid-state batteries (ASSBs).
研究领域:
材料科学
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电化学
✓ 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）