Energy Storage Materials
·
2020
·
IF 16.28
Jiewen Tan,Xin Ao,Alvin Dai,Yifei Yuan,Hao Zhuo,Hao Lu,Libin Zhuang,Yuxuan Ke,Chenliang Su,Xinwen Peng,Bingbing Tian,Jun Lu
Poly(ethylene oxide) (PEO)-based polymer electrolytes are promising candidates for solid-state electrolytes in safer, next generation lithium metal batteries. Despite their benefits however, PEO-based electrolyte exhibits highly crystalline ethylene oxide chains that provide poor ionic conductivity and, thus severely limit its practical application. Here, we report the use of hydroxypropyl trimethylammonium bis(trifluoromethane) sulfonimide chitosan salt (HACC-TFSI), which is an amorphous poly(ionic liquid) based biomass chitosan derivative, as a modifier for PEO-based solid polymer electrolytes (SPEs) to address these deficiencies. Hybrid SPEs with HACC-TFSI display enlarged amorphous regions with enhanced ionic conductivity. Interactions between quaternary ammonium cations and TFSI − anions in hybrid SPEs are also found to promote dissociation between Li + and TFSI − , which further increases ionic mobility. Moreover, the electrochemical stability, mechanical strength, and thermal stability of hybrid SPEs are collectively superior to blank SPEs without HACC-TFSI. LiFePO 4 /SPEs/Li full-cells assembled using 10wt% HACC-TFSI in PEO (10%HACC-TFSI/SPEs) electrolyte provide a capacity of 161.3 mAh g −1 and operate with excellent cycle performances at 0.2 C and 60 °C. Even when the temperature is increased to 150 °C, LiFePO 4 /SPEs/Li cells with 10%HACC-TFSI/SPEs still display remarkable cycle performance with 73% capacity retention after 100 cycles at 1 C rate.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2026
·
IF 10.7
Yinzuo Wu,Hua Zhu,Ziyue Fu,Qinlong Zhou,Pengliang Zhang,Qiang Shangguan,Haibang Zhang,Hedong Jiang,Pingchun Guo,Yanxiang Wang,Shijin Yu
The inherent low ionic conductivity and lithium dendrite growth challenges of poly(ethylene oxide) (PEO)-based solid-state electrolytes pose significant barriers to their utilization in safe, high-energy-density lithium metal batteries. To overcome these challenges, this study designed a novel composite solid electrolyte by introducing a HKUST-1 metal-organic framework (HP-Cu-MOF) with a hierarchical microporous/mesoporous structure into a PEO matrix. The unique dual-pore structure of HP-Cu-MOF enables synergistic regulation: its micropores effectively confine TFSI − anions, significantly increasing the Li + transference number t Li + to 0.40 at 60 °C (vs. 0.11 for pure PEO), while the interconnected mesopores construct continuous ion transport channels, achieving a high ionic conductivity of 7.83 × 10 −4 S cm −1 at 60 °C. Simultaneously, the regular octahedral rigid framework of HP-Cu-MOF enhances the mechanical strength of the electrolyte, with Young's modulus increasing to 2.17 GPa (vs. 1.09 GPa for pure PEO). This enables a high critical current density of 1.7 mA cm −2 and excellent cycling stability, with Li symmetric cells stably operating for over 1800 h at 0.2 mA cm −2 . Furthermore, the electrolyte exhibits a broad electrochemical stability window of 5.1 V, enabling compatibility with high-voltage cathodes. The assembled LFP full cell delivers an initial discharge specific capacity of 151.2 mAh g −1 at 0.5C with excellent capacity retention. This work demonstrates that hierarchically porous MOFs offer an efficient electrolyte design strategy for developing next-generation lithium metal batteries integrating high energy density, long cycle life, and enhanced safety.
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2024
·
IF 3
Jianling Tian,Ruiyang Li,Xueying Yang,Pengbin Lai,Jiaxiang Liu,Ruilai Ye,Yi Deng,Qichen Chen,Peng Zhang,Jinbao Zhao
Polyethylene oxide (PEO) is considered as the most promising and widely studies polymer matrix . However, its practical application is limited for its low ionic conductivity at room temperature . Here, a novel fluorinated branched (2,2,2-Trifluoroethyl methacrylate (TFEMA)) ether polymer (PFP) was synthesized through thiol-Michael addition click reaction and blended with PEO to obtained PEO-based polymer electrolyte . The introduction of PFP could reduce the crystallinity and hinder the migration of anions, resulting in a double increase in ionic conductivity and lithium-ion transference number. More importantly, the symmetric Li/Li employing blended polymer shows stable cycle more than 1700 h and the Li/LiFePO 4 cell shows the superior performance of both cycling and rating at 60 °C. Even at lower temperature (28 °C), the Li/LiFePO 4 cell exhibits encouraging cycling performance with 88.6% capacity retention at 0.2C after 100 cycles. This study provides a novel strategy for structural design and synthesis progress of solid polymer electrolyte .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2011
·
IF 2.733
Wei Gong,Zhi-Yu Dou,Ping Liu,Xue-Ying Cai,Xing-quan He
The novel covalently modified glassy carbon electrode with polyethylene oxide has been prepared using an electroadsorption method for the simultaneous determination of dopamine (DA) and ascorbic acid (AA). This new electrode presented an excellent electrocatalytic activity towards the oxidation of DA and AA by cyclic voltammetry (CV) and differential pulse voltammetry (DPV) methods. The separation potentials of the oxidation peak potentials for them were about 155 mV in CV and 216 mV in DPV. The differences are large enough to determine DA and AA individually and simultaneously. Calibration curves in the ranges of 5.0–40 and 300–1700 μmol L −1 were obtained for DA and AA, respectively. The lowest detection limits (S/N = 3) were 0.25 and 50 μmol L −1 for DA and AA, respectively.
研究领域:
分析化学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yongyu Liu,Longfei Han,Can Liao,Heng Yu,Yongchun Kan,Yuan Hu
The safety problems of lithium-ion batteries (LIBs) have aroused great concern on account of their extensive use. It is believed that the replacement of flammable liquid electrolytes with solid electrolytes (SSE) will solve this problem and provide an unmatched energy density for lithium-based batteries. Here, Lithium hexafluorophosphate (LiPF 6 ) and ionic liquid serve as flame retardants for Poly (ethylene oxide) (PEO) solid electrolytes with Polyamide 6 (PA6) membrane as the skeleton. PA membrane can not only decrease the crystallinity of PEO to facilitate lithium-ion migration, but also inhibit the growth of lithium dendrites, which is attributed to its lithium-philic properties, adequate mechanical properties and flexibility. In addition, the increase of ionic liquid, on the one hand, can provide hexafluorophosphoric acid ions, which endow the SSE with excellent flame-retardant performance. The electrolyte exhibits self-extinguishing properties after ignition. On the other hand, the ionic liquid can protect the lithium anode and develop a robust SEI, thus giving the battery smooth long-cycle performance (Capacity retention rate at 1800th cycle: 89.06%). The innovative design idea of developing high-powered LIBs by introducing low-cost PA6 membranes into all solid compounds is appealing, and it can also be expanded to a combination of assorted polymers to encounter the requirements of a variety of batteries.
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
DYES AND PIGMENTS
·
2022
·
IF 5.122
Maolin Wang,Tingwen Wei,Long Jiang,Jing Wang,Yajing Li,Wenyan Wu,Xiaojian Huang,Fang Wang,Sheng Lu,Xiaoqiang Chen
Developing ultraviolet (UV) sensors that can visualize UV light in the environment for productive life has been widely practiced. A challenging problem that arises in this domain is the quantitative analysis of UV light . In this study, we identified a novel naphthalimide derivative, NDGF , which can undergo decomposition to various degrees when irradiated by UV light with different intensities, so as to produce corresponding fluorescence intensities . Moreover, NDGF was prepared as a UV-responsive film NDGF-PEO which also has outstanding competence in the quantification of UV intensity. The surprising thing is that this novel UV-responsive decomposition mechanism of NDGF has been demonstrated and has great potential to open new doors for the development of naphthalimide-based photocages and novel UV quantitative sensors.
研究领域:
材料科学
·
光化学
·
分析化学
·
传感器
✓ 已验证
产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2020
·
IF 10.257
Zulan Li,Ye Liu,Xingming Chen,Hongyan Cao,Haiying Shen,Lei Mou,Xinli Deng,Xingyu Jiang,Yulong Cong
How to balance the sensitivity and signal-to-noise ratio of immunosensor remains many challenges during various diseases diagnosis. Here we develop a new microfluidic immunosensor based on surface-modified mesoporous nanofibers , and simultaneously realize an ultra-sensitivity and high signal-to-noise ratio for the detection of multiple biomarkers. In the current study, we fabricated titanium dioxide (TiO 2 )-based mesoporous electrospinning nanofibers, and modified nanofiber surface with both octadecylphosphonic acid (OPA) and poly(ethylene oxide)-poly(propylene oxide) triblock copolymer (PEO-PPO-PEO). Such nanofibers as solid substrate are covered on microfluidic channels. The porosity of our nanofibers dramatically increased the adsorption capability of antibodies, realizing an ultra sensitivity of biomarker detection. PEO-PPO-PEO modification can significantly block non-specific absorptions, obtaining a satisfied signal-to-noise ratio. For the detection of HIV p24 and interleukin 5 (IL-5), our immunosensor increased 6.41 and 6.93 fold in sensitivity and improved 504.66% and 512.80% in signal-to-noise ratio, in compared with gold standard immunoassay (ELISA) used in the clinic. Our immunosensor also broaden the linear range for the detection of HIV p24 (0.86–800 pg/ml) and IL-5 (0.70–800 pg/ml), in compared with ELISA which is 5.54–500 pg/ml for HIV p24 and 4.84–500 pg/ml for IL-5. Our work provided a guideline for the construction of advanced point-of-care immunosensor with an ultra-sensitivity and high signal-to-noise ratio for disease diagnosis.
研究领域:
生物传感器
·
纳米技术
·
疾病诊断
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IONICS
·
2022
·Vol. 28
·期 12
·5341-5350
·
IF 2.961
Wang Lei,Yan Jiawei,Shen Wenzhuo,Zhong Min,Zhang Jiali,Guo Shouwu
Poly(ethylene oxide) (PEO)-based polymeric solid electrolytes (PSEs) hold great promise for all-solid-state lithium batteries, but the intrinsic low mechanical strength of PEO limits their practical application and scale production. Herein, PSEs consisting of PEO and lithium bis(trifluoromethanesulfonyl)-imide (LiTFSI) supported on poly(hexamethylene adipamide) (nylon) nanofiber matrix (nylon@PEO/LiTFSI PSEs) are designed and prepared in situ on the Al, Cu foils, and the LiFePO 4 electrodes through coaxially electrospinning at 45 °C. The nylon@PEO/LiTFSI PSEs show nonporous morphology due to in situ melting of the PEO/LiTFSI shell. The mechanical strength of the nylon@PEO/LiTFSI PSE can reach to 3.32 and 2.44 MPa at 25 and 60 °C, respectively, which is stronger than that of the pure PEO membrane or the PSEs prepared via conventional solution casting. The nylon@PEO/LiTFSI PSEs also show tight interfacial contact with LiFePO 4 electrode, resulting in small charge transfer resistance of 376 Ω, and thus afford the LiFePO 4 half coin cells with long charge/discharge cycling stability.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
RARE METALS
·
2022
·Vol. 42
·期 3
·875-884
·
IF 6.318
Wang Xin,Shen Xiu,Zhang Peng,Zhou Ai-Jun,Zhao Jin-Bao
In the polyoxyethylene (PEO)-based solid-state electrolytes, the low ionic conductivity of lithium ions limits its application in solid-state lithium batteries, so optimizing the conduction path of lithium ions is beneficial to improve the ionic conductivity. In this work, we report the use of hydrothermal carbon nano-sphere (HCS) modified glass fibers (GF) as a functional filler (GF@HCS) to improve the ionic conductivity of PEO composite solid-state electrolytes. The oxygen atoms in the hydroxyl groups on the surface of HCS can be complexed with Li ions as its transport sites, which means that it can promote the long-distance transport of Li ions along the glass fiber surface. With addition of 2 wt% GF@HCS fillers, the degree of crystallinity of PEO composite solid-state electrolyte is the smallest, and the ionic conductivity is significantly increased from 8.9 × 10 –5 to 4.4 × 10 –4 S·cm −1 at 60 °C. Moreover, the PEO composite solid-state electrolyte exhibits better lithium–metal interface stability in symmetric lithium batteries and superior rate performance in LiFePO 4 solid-state batteries. Graphical abstract
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子科学
·
固态离子学
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2020
·
IF 3.107
Shuhong Yi,Tinghua Xu,Li Li,Mengmeng Gao,Kai Du,Huiling Zhao,Ying Bai
Organic-inorganic composite solid state electrolytes (SSEs), as one of the most attractive candidates for next generation SSEs, combines the both advantages of flexibility (from organic polymer) and structure rigidity (from robust inorganic constituent). In this work, a high performance three-dimensional (3D) crosslinked electrolyte with polymer poly(vinylidene fluoride) (PVDF) and polyethylene oxide (PEO) matrices is further modified by dispersing submicron fast ion conductor Li 1.4 Al 0.4 Ti 1.6 (PO 4 ) 3 (LATP). The optimal 3D composite SSE PVDF@10PEO-5LATP-5LiPF 6 (PPLL) shows high ionic conductivities of 5.24 × 10 −4 S cm −1 at 25 °C and above 10 −3 S cm −1 at 50 °C. Galvanostatic cycling test demonstrates that PPLL contributes to electrochemical performances, with high capacity retention of 93.95% after 500 cycles for LiFePO 4 cathode. Further investigations indicate its more benefits including excellent flexibility and superior safety. Intensive explorations imply that the interaction between dual-matrix degrades the respective crystallization through generating weak bonding, and the recombination with LATP further enhances ionic conductivity as well as structural stability of composite electrolyte via strengthening interface reaction, and reducing the organic crystallinity. This composite SSE with high conductivity and stability may be applied in next generation energy storage devices, particularly in all-solid-state secondary batteries.
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Jiechen Song,Yuxing Xu,Yuncheng Zhou,Pengfei Wang,Hailan Feng,Jun Yang,Fuchang Zhuge,Qiangqiang Tan
In the field of solid-state lithium metal batteries (SSLMBs), constructing vertically heterostructured poly(ethylene oxide) (PEO)-based solid electrolytes is an effective method to realize their tight contact with cathodes and Li anodes at the same time. Succinonitrile (SN) has been widely used in PEO-based solid electrolytes to improve the interface contact with cathodes, enhance the ionic conductivities, and obtain a high electrochemical stability window of PEO, but its application is still hindered by its intrinsic instability to Li anodes, which results in corrosion and side interactions with lithium metal. Herein, the cellulose membrane (CM) is introduced creatively into the vertically heterostructured PEO-based solid electrolytes to match the PEO-SN solid electrolytes at the cathode side. With the advantage of the interaction between −OH groups of CM and −C≡N groups in SN, the movement of free SN molecules from cathodes to Li anodes is limited effectively, resulting in a stable and durable SEI layer. In specific, the Li||LiFePO4 battery with the CM-assisted vertically heterostructured PEO-based solid electrolyte by in situ preparation delivers a discharge capacity of around 130 mAh g–1 after 300 cycles and capacity retention of 95% after 500 cycles at 0.5 C. Our work provides a solution to construct PEO-based solid electrolytes feasible to match cathodes and Li anodes effectively by intimate contact with electrodes.
研究领域:
材料科学
·
电化学
·
储能技术
·
固态电池
·
聚合物电解质
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Huihui Gan,Jiajun Sun,Ye Xia,Pengyuan Qiu,Liang Li,Wen Zhu
Functionalized separator is more competitive than commercial polyolefin separator for rechargeable lithium-ion batteries. In this work, we design the separator modified by a composite coating layer, which is composed of Li6.75La3Zr1.75Ta0.25O12 (LLZTO), poly(ethylene oxide) (PEO), poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) and lithium bis(triuoromethanesulfonyl) imide (LiTFSI) (LLZTO-PEO/PVDF-HFP/LiTFSI, LLZTO-PPL). The LLZTO-PPL composite coating layer gives an impressive effect on dendrite inhibition of lithium metal. In comparison with commercial polyolefin separator, smaller overpotential value and better Coulombic efficiency are observed for the Li/LLZTO-PPL/Li symmetric cells and the Li/LLZTO-PPL/Cu asymmetric cells at various current densities of 0.2, 0.5, and 1 mA cm–2. Moreover, the LLZTO-PPL composite coating layer modified separator exhibits better high-rate capability and cycle performance for these cells assembled with different kinds of cathode materials (LiFePO4, LiCoO2, and LiNi0.8Co0.1Mn0.1O2) and their counterpart of a lithium metal anode. The functionalized composite coating layer modified separator may be a more attractive candidate material for commercial lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
储能
·
电池技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）