CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xuming Luo,Xianneng He,Han Su,Yu Zhong,Xiuli Wang,Jiangping Tu
Several halide electrolytes have come back into the spotlight with their high ionic conductivity, soft texture and compatibility with high-voltage electrodes. However, the instability with lithium metal has hindered their application in all-solid-state lithium-metal batteries (ASSLMBs). Thereby, it is urgent to find an efficient way to tackle this issue. Herein, we have simultaneously enhanced the kinetic stability towards lithium metal and intrinsic stability towards high-voltage cathodes for Li 2 ZrCl 6 electrolytes via effective dual-halogen strategy while the ionic conductivity of electrolyte is not sacrificed due to the effects of morphology modification. Specially, the symmetric Li/Li 2 ZrCl 5.2 F 0.8 /Li cell can cycle stably for over 2000 h (0.1 mA cm - 2 , 0.5 mA h cm - 2 ) and the modified electrolyte Li 2 ZrCl 5.2 F 0.8 also shows higher oxidative stability than the original Li 2 ZrCl 6 . The in-situ formed fluoride interphase (LiF, ZrF x ) can account for the excellent kinetic stability at Li/Li 2 ZrCl 5.2 F 0.8 interface while the improved oxidative stability can be attributed to the higher electronegativity of F element. Finally, the Li 2 ZrCl 5.2 F 0.8 is also proved appliable in the Li/Li 2 ZrCl 5.2 F 0.8 /LiNi 0.8 Co 0.1 Mn 0.1 O 2 battery in the form of stable and satisfied discharge capacity (∼106.9 mAh g - 1 , the 20th - 65th cycle) due to the achievement of kinetic stability at Li/Li 2 ZrCl 5.2 F 0.8 interface in the initial stage (the first ∼ 19 cycles). The clever dual-halogen strategy proposed in this work can effectively enhance the electrochemical stability of electrolytes and foster the application of cost-effective Li 2 ZrCl 6 halides in ASSLMBs.
研究领域:
材料科学
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电化学
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电池技术
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Guoxin Qin,Jianli Zhang,Haibo Chen,Hang Li,Jing Hu,Qiang Chen,Guangya Hou,Yiping Tang
The electrochemical performance of lithium-ion batteries (LIBs) is closely associated with the solid electrolyte interface (SEI) film formed on the surface of the anode. The pursuit of a stable and dense SEI film to enhance the electrochemical performance of LIBs has been a focal point in this field. In this paper, the additive of lithium difluoro(oxalate)borate (LiODFB) is used into the electrolyte to optimize the SEI film for Li || graphite half-cell and LiFePO 4 (LFP) || graphite full-cell. A systematic investigation is conducted to explore the influence patterns and action mechanisms of different LiODFB contents on the electrochemical performance of LIBs. For the first time, it is confirmed through cryo-TEM that LiODFB contributes to the formation of a dense, continuous, and uniform SEI layer , especially rich of LiF. This unique SEI film contributes to the high electrochemical performance of LIBs. The half-cell containing 4 wt.% LiODFB maintains a capacity retention rate of up to 94 % after 300 cycles, and the full-cell still exhibits a specific capacity of 102 mAh g −1 after 600 cycles. In contrast, the sample without LiODFB only retains 76 % of its capacity after 300 cycles, and 39 % after 600 cycles, respectively. Furthermore, the cells with 4 wt.% LiODFB exhibit the lowest charge transfer resistance and oxidation–reduction potential polarization, and highest Li + transport rates during charge and discharge processes.
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
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2022
·
IF 10.319
Xuanyi Zhou,Chenghan Li,Biao Zhang,Fenfen Huang,Pan Zhou,Xinming Wang,Zengsheng Ma
As an essential part of the performance improvement of lithium metal batteries, the acquisition of dense (LiF-rich solid electrolyte interphase (SEI)) has always been an urgent problem to be solved. Herein, we synthesized Zeolitic Imidazolate Frameworks (ZIFs) modified by two different functional groups (–NH 2 , –CH 3 ) and used them as the fillers of polyethylene oxide (PEO) composite solid electrolytes to explore the catalytic effect of groups on LiF generation at the Li/electrolytes interface. In a LiFePO 4 ||SPE||Li cell test, the PEO-ZIF-NH 2 with LiF-rich SEI exhibits enhanced cycling performance, which was 3.8 times longer than that of PEO-ZIF-CH 3 . The formation mechanism of LiF-rich SEI was investigated using first-principles calculation, revealing that ZIFs-NH 2 makes the C–F bond in TFSI – longer compared with ZIFs-CH 3 , which leads to easier breakage of the C–F bond and promoted the formation of LiF. The simple design idea of using organic catalysis to generate more stable SEI provides a new aspect for preparing high-performance lithium metal batteries.
研究领域:
材料科学
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电化学
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电池技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Xue Ye,Jing Wu,Jianneng Liang,Yipeng Sun,Xiangzhong Ren,Xiaoping Ouyang,Dazhuan Wu,Yongliang Li,Lei Zhang,Jiangtao Hu,Qianling Zhang,Jianhong Liu
Low cycling Coulombic efficiency (CE) and messy Li dendrite growth problems have greatly hindered the development of anode-free Li-metal batteries (AFLBs). Thus, functional electrolytes for uniform lithium deposition and lithium/electrolyte side reaction suppression are desired. Here, we report a locally fluorinated electrolyte (LFE) medium layer surrounding Cu foils to tailor the chemical compositions of the solid-electrolyte interphase (SEI) in AFLBs for inhibiting the immoderate Li dendrite growth and to suppress the interfacial reaction. This LFE consists of highly concentrated LiTFSI dissolved in a fluoroethylene carbonate and/or succinonitrile plastic mixture. The CE of Cu||LiNi0.8Co0.1Mn0.1O2 (NCM811) AFLB increased to a high level of 99% as envisaged, and the cycling ability was also highly improved. These improvements are facilitated by the formation of a uniform, dense, and LiF-rich SEI. LiF possesses high interfacial energy at the LiF/Li interface, resulting in a more uniform Li deposition process as proved by density functional theory (DFT) calculation results. This work provides a simple yet utility tech for the enhancement of future high-energy-density AFLBs.
研究领域:
电化学
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材料科学
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电池技术
✓ 已验证
DOI
PubMed
高影响因子
Energy & Environmental Materials
·
2025
·
IF 14.1
Yuanxin Gao,Xinyi Wang,Dong Lv,Zhang Zhang,Jiangpeng Li,Xiaoyan Feng,Jingchao Chai,Yun Zheng,Yu Peng,Yanqing Wang,Yingying Wang,Lingyu Zhu,Zhihong Liu
Fluorinated amide electrolytes represent a promising solution for high-energy density lithium metal batteries, yet their application in Ni-rich layered oxide cathodes is hindered by interfacial instability. This study develops a non-flammable fluorinated amide-based deep eutectic electrolyte modified with fluoroethylene carbonate, which simultaneously enhances ionic conductivity (1.5 × 10 −4 S cm −1 ) and anodic stability (>4.4 V vs Li + /Li). Applied in Li/NCM811 batteries, the fluoroethylene carbonate-based electrolyte enables 83.2% capacity retention after 200 cycles at 0.5 C, significantly outperforming conventional counterparts. ToF-SMIS and XPS tests reveal that fluoroethylene carbonate facilitates the formation of a LiF-rich cathode-electrolyte interphase, suppressing parasitic reactions and improving Li + transport kinetics. Furthermore, the electrolyte demonstrates superior lithium metal compatibility, inhibiting dendrite growth while enhancing thermal safety. These findings underscore the critical role of fluorinated amide electrolytes in stabilizing Ni-rich cathodes and highlight their potential for next-generation high-voltage lithium metal batteries.
研究领域:
电化学
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材料科学
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能源化学
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界面化学
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锂离子电池
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电极材料
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 9
·期 6
·3576-3583
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IF 11.301
Shijun Tang,Guiwei Chen,Fucheng Ren,Hongchun Wang,Wu Yang,Chenxi Zheng,Zhengliang Gong,Yong Yang
The electronic conductivity of solid electrolytes, which plays an important role in inducing Li dendrite deposition, is a key obstacle to the practical application of Li metal in all-solid-state lithium metal batteries. Herein, an ultrathin insulating LiF coating with controllable thickness is proposed as an electronic isolation layer to inhibit the formation of Li dendrites. The homogeneous LiF interfacial layer can effectively facilitate the physical contact of the Li metal and LLZTO electrolyte and promote uniform Li plating/stripping. In contrast to the inhomogeneous lithium nucleation and dendritic lithium growth in an unmodified LLZTO electrolyte induced by electron beam irradiation, dendritic Li deposition is efficiently inhibited on LiF coated LLZTO. The Li|0.5LF-LLZTO|Li symmetric cell exhibits a low interfacial impedance of 12.7 ohm cm2 and stable Li plating/stripping without lithium penetration, over 1500 hours at 0.2 mA cm−2 and 300 hours at 0.4 mA cm−2. Besides, the Li|0.5LF-LLZTO|LiCoO2 full cell also shows excellent long-term cycling stability with a high capacity retention of 76.8% after 2500 cycles at 1C. Our results reveal the importance of tuning the interface modification layer properties to guide the uniform lithium plating toward suppressing Li dendrite formation in solid electrolytes.
研究领域:
材料科学
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电化学
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电池技术
✓ 已验证
DOI
高影响因子
Small
·
2022
·Vol. 18
·期 40
·2202981
·
IF 15.153
Minrong Guan,Yongxin Huang,Qianqian Meng,Botao Zhang,Nuo Chen,Li Li,Feng Wu,Renjie Chen
The next generation of high-energy-density storage devices is expected to be rechargeable lithium metal batteries. However, unstable metal-electrolyte interfaces, dendrite growth, and volume expansion will compromise lithium metal batteries (LMB) safety and life. A simple drop-casting method is used to create a double-layer functional interface composed of inorganic mesoporous TiO 2 and F-rich organics PFDMA. For high-quality lithium deposition, TiO 2 can provide uniform mechanical pressure, abundant mesoporous channels, and increased ionic conductivity, while PFDMA provides enough F to form LiF in the first cycle and improves Li-electrolyte compatibility. Experiments and simulations are combined to investigate the optimized mechanism of the LiF-rich solid electrolyte interface (SEI). The high binding energy of organic matter and Li demonstrates that Li + preferentially binds with the F atom in organic matter. As a result, the tightly bound double-layer structure can inhibit lithium dendrite growth and slow electrolyte decomposition. Consequently, the symmetric Li||Li cell has a high stability performance of over 800 h. The assembled LiFePO 4 ||Li cell can sustain 300 cycles at a 1 C rate and has a reversible capacity of 136.7 mAh g −1 .
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Hongping Hou,Amei Zhang,Huan Yang,Na Liao,Shailendra Rajput,Hongliang Du,Chunchun Li
A low permittivity microwave dielectric ceramic, Li-containing silicate (LiGaSiO 4 ), was synthesized using the standard solid-state reaction method. The nominal LiGaSiO 4 ceramic exhibited a relative permittivity of approximately 4.4. The effects of nonstoichiometric Li on the microstructure, sintering behavior, and microwave dielectric properties of LiGaSiO 4 were comprehensively investigated. Excess Li content (6 mol%) significantly improved the relative density (96.1 %) and microwave dielectric properties ( ε r ∼5.34, Q × f ∼55,600 GHz, and τ f ∼ -48.6 ppm/°C), while reducing the optimum sintering temperature from 1070 °C to ∼1010 °C. Additionally, the incorporation of 2 wt% LiF further reduced densification temperature (∼940 °C). The regulation of the τ f was achieved through the addition of CaTiO 3 ceramic, and a patch antenna was designed and fabricated using a modified Li 1.06 GaSiO 4 -LiF-CaTiO 3 composite ceramic. The resulting patch antenna resonates at 5.87 GHz with an impressive bandwidth of 83.1 MHz, while both simulated and measured results demonstrate excellent agreement.
研究领域:
材料科学
·
电磁学
·
天线工程
·
微波工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Zhiqiang Fang,Ming Zhao,Yan Peng,Shiyou Guan
Solid-state electrolytes can guarantee the safe operation of high-energy density lithium metal batteries (LMBs). However, major challenges still persist with LMBs due to the use of solid electrolytes, that is, poor ionic conductivity and poor compatibility at the electrolyte/electrode interface, which reduces the operational stability of solid-state LMBs. Herein, a novel fiber-network-reinforced composite polymer electrolyte (CPE) was designed by combining an organic plastic salt (OPS) with a bicontinuous electrospun polyvinylidene fluoride-co-hexafluoropropylene (PVDF–HFP)/Li7La3Zr2O12 (LLZO) membrane. The presence of LLZO in the composite helps to promote the dissociation of FSI– from OPSs. Subsequently, the dissociated FSI– is then involved in the formation of a LiF-rich solid electrolyte interphase (SEI) layer on the lithium anode via a reductive decomposition reaction, which was affirmed by theoretical calculations and experimental results. Due to the LiF-rich SEI layer, the Li/Li symmetric cell was able to demonstrate a long cyclic life of over 2600 h at a current density of 0.1 mA cm–2. More importantly, the as-prepared CPE achieved a high ionic conductivity of 2.8 × 10–4 S cm–1 at 25 °C, and the Li/LiFePO4 cell based on the CPE exhibited a high discharge capacity and 83.3% capacity retention after 500 cycles at 1.0 C. Thus, the strategy proposed in this work can inspire the future development of highly conductive solid electrolytes and compatible interface designs toward high-energy density solid-state LMBs.
研究领域:
材料科学
·
储能
·
电化学
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电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2013
·Vol. 36
·期 15
·2530-2537
·
IF 2.591
Maria del Mar Barrios-Romero,Agustín G. Crevillén,José Carlos Diez-Masa
This work describes the development of an SDS-gel electrophoresis method for the analysis of major whey proteins (α-lactalbumin, β-lactoglobulin, and BSA) carried out in SU-8 microchips. The method uses a low-viscosity solution of dextran as a sieving polymer. A commercial coating agent (EOTrol LN) was added to the separation buffer to control the EOF of the chips. The potential of this coating agent to prevent protein adsorption on the walls of the SU-8 channels was also evaluated. Additionally, the fluorescence background of the SU-8 material was studied to improve the sensitivity of the method. By selecting an excitation wavelength of 532 nm at which the background fluorescence remains low and by replacing the mercury arc lamp by a laser in the detection system, an LOD in the nanomolar range was achieved for proteins derivatized with the fluorogenic reagent Chromeo P540. Finally, the method was applied to the analysis of milk samples, demonstrating the potential of SU-8 microchips for the analysis of proteins in complex food samples.
研究领域:
分析化学
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蛋白质组学
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食品分析
·
微流控技术
✓ 已验证
DOI
PubMed
高影响因子
Nature Communications
·
2020
·Vol. 11
·期 1
·1-11
·
IF 12.121
Liu Wei,Li Jinxing,Li Wenting,Xu Hanying,Zhang Chao,Qiu Xinping
The low Coulombic efficiency during cycling hinders the application of Cobalt-free lithium-rich materials in lithium-ion batteries. Here we demonstrated that the dissolution of iron, rather than traditionally acknowledged manganese, is mainly responsible for the low Coulombic efficiency of the iron-substituted cobalt-free lithium-rich material. Besides, we presented an approach to inhibit the dissolution of transition metal ions by using concentrated electrolytes. We found that the cathode electrolyte interphase (CEI) layer formed in the concentrated electrolyte is a uniform and robust LiF-rich CEI, which is a sharp contrast with the uneven and fragile organic-rich CEI formed in the dilute electrolyte. The LiF-rich CEI not only effectively inhibits the dissolution of TMs but also stabilizes the cathode structure. The Coulombic efficiency, cycling stability, rate performance, and safety of the Fe-substituted cobalt-free lithium-rich cathode material in the concentrated electrolyte have been improved tremendously.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF LIQUID CHROMATOGRAPHY & RELATED TECHNOLOGIES
·
2018
·
IF 0.827
Liwei Cao,Tian Wei,Yihui Shi,Xiaofang Tan,Jianxin Meng
Two rapid and sensitive analytical methods are developed for the determination of D-penicillamine (D-PEN) and tiopronin (TP) through high-performance liquid chromatography with fluorescence detection (HPLC-FLD) and capillary electrophoresis with laser-induced fluorescence detection (CE-LIF). A boron-dipyrrolemethene (BODIPY) fluorescence labeling reagent, 1,3,5,7-tetramethyl-8-bromomethyl-difluoroboradiaza-s-indacene (TMMB-Br) was successfully applied to derivatize these two thiol drugs. Fluorescein was used as the internal standard (IS) for the quantification of D-PEN and TP in CE-LIF. The derivatization and separation conditions were optimized carefully. Under the optimum conditions, the HPLC and CE separation of D-PEN and TP could be achieved within 12 min. The limits of detection were as low as 2.0 nmol/L for HPLC-FLD and 0.47 nmol/L for CE-LIF. The drugs in human urine and serum samples were determined successfully, and the recoveries were 95.0–06.7% and 95.2–104.3%, respectively.
研究领域:
分析化学
·
药物分析
·
生物医学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）