JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Shijie Lu,Xiaorong Chu,Chunli Li,Zhikun Zhao,Jianxiong Xiao,Borong Wu,Daobin Mu
High ionic conductivity and good interface compatibility have always been two major bottlenecks for solid-state electrolytes. Herein, a composite electrolyte membrane comprising poly (propylene carbonate), PVDF-HFP and Li 6 · 3 La 3 Zr 1 · 4 Ta 0 · 6 O 12 is successfully prepared via electrospinning. With the assistance of succinonitrile, the synthesized solid-state electrolyte exhibits high ionic conductivity (1.32 × 10 −3 S cm −1 at room temperature), oxidation potential up to 4.5 V vs Li/Li + and high Li + transference number (0.81). This desirable performance is attributed to the combination of PPC with good Li + conduction ability and PVDF-HFP with excellent mechanical properties, forming a continuous transport framework within the electrolyte. The introduced active fillers and small molecular additive not only benefit to fast Li + mobility, but also reinforce the stability towards Li metal. Li symmetric cell using the solid-state electrolyte can last for 800 h at a current density of 1.0 mA cm −2 with a low overpotential. The NCM811 cell using the electrolyte membrane shows high initial discharge specific capacity (184.3 mAh g −1 at 1 C) and good capacity retention (80.1% after 300 cycles at 30 °C).
研究领域:
材料科学
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电化学
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电池技术
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纳米技术
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Weitao Jing,Kunyang Zou,Xin Dai,Junjie Sun,Qiang Tan,Yuanzhen Chen,Yongning Liu
Lithium metal has been considered one of the most ideal anode materials for batteries due to its ultrahigh theoretical capacity and energy density . However, the unstable SEI layer and the growth of Li dendrites cause poor cycling performance and even safety hazards, which also severely restrict the commercial application of Li metal batteries . In this paper, a Li-In alloy anode was designed and prepared by mechanical rolling of both Li and In pure metal foils together. Three-dimensional Li-In alloy network structures are formed by mechanical alloying during rolling, and the 3D Li-In alloy structure not only possesses strong lithium affinity but also possesses more interface between the Li matrix and the second phase formed in mechanical alloying, which can promote rapid diffusion at the interface and uniform deposition of lithium ions . As a result, the Li-In electrode shows an extremely low overpotential of approximately 35 mV at a high current density of 5 mA cm −2 during the lithium plating/stripping experiment. In addition, the battery revealed a higher discharge capacity of 295 mAh/g at 0.05 C and capacity retention of 80 % after 150 cycles when the Li-In alloy was used as the anode electrode in a cell with Li 1.2 Ni 0.2 Mn 0.6 O 2 as the cathode. The Li-In alloy can also be used as anode of Li-S battery, the result showed that the capacity decay rate was reduced from 0.22 % to 0.1 % after 200 cycles without any decoration treatment of S cathode except conductive carbon. This work verified that indium in the Li-In alloy can effectively protect the lithium anode and provides an idea for the practical application of lithium metal 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
ACS Applied Materials & Interfaces
·
2021
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IF 9.229
Yin Hu,Yongyuan Ren,Rongwei Shi,Jiangtao Yu,Zhe Sun,Siyu Guo,Jiangna Guo,Feng Yan
Mechanically strong separators with good electrolyte wettability and low-shrinkage properties are desirable for highly efficient and safe lithium batteries. In this study, multifunctional nanofiber membranes are fabricated by electrospinning a homogeneous solution containing amphiphilic poly(ethylene glycol)diacrylate-grafted siloxane and polyacrylonitrile. After the chemical cross-linking of siloxane, the prepared nanofiber membranes are found to exhibit good mechanical properties, high thermostability, and superior electrolyte-philicity with aqueous and nonaqueous electrolytes. Li–metal cells with the fabricated membrane separator exhibit high cycling stability (Coulombic efficiency of 99.8% after 1000 cycles). Moreover, improved cycling stability of Li–sulfur batteries can be achieved using these membrane separators. These membrane separators can be further used in flexible aqueous lithium-ion batteries and exhibit steady electrochemistry performance. This work opens up a potential route for designing multifunctional universal separators for rechargeable batteries.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
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IF 5.6
Xin Luo,Weilong Ren,Huanhuan Xing,Muhammad Irfan Hussain,Qumail Arshad,Yuzeng Li,Zhiyuan Liu,Changyong Liu,Zhangwei Chen
Vat photopolymerization 3D printing technique enables the precise fabrication of ceramic components with highly complex shapes and improved performance. It has been used for the preparation of Li 4 SiO 4 ceramic units, which are a promising candidate for stable tritium breeding in fusion reactions. In order to further enhance the production properties, herein metal oxide additions are proposed to combine with the previously reported generative shaping and material-forming (GSM) strategy. A remarkable theoretical density of 92.8 % and crushing load of 38.54 N reveal the effectiveness of this approach in producing robust ceramic units potentially suitable for tritium production. The study is proved to be cost-effective, highly efficient in production and most importantly to be able to produce high-performance Li₄SiO₄-based tritium breeding ceramics. Our findings provide a new insight into lithium-based tritium breeders preparation and applications, supporting their potential in fusion energy.
研究领域:
材料科学
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核能工程
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先进制造
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 23
·12575-12587
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IF 14.511
Dichang Guan,Guorong Hu,Zhongdong Peng,Yanbing Cao,Jiahui Wu,Min Huang,Shuai Zhang,Yuqing Dai,Yifan Gong,Ke Du
In this work, we develop a nonflammable low-concentration electrolyte (LCE) based on the Li+-solvation sheath structure. It consists of only 0.4 M LiPF6 in the mixture of ethylene carbonate (EC), dimethyl carbonate (DMC), and 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether (TTE). Abundant incombustible TTE is used as an inert cosolvent to regulate the Li+-solvation sheath structure. With the addition of TTE, the oxidation stability of the LCE is enhanced as a result of reduced free-state solvent molecules and strengthened interactions between Li+ and EC/DMC molecules. The rate and cycling performances of Li‖LFP and Li‖NCM811 cells in 0.4 M LiPF6–EC/DMC/TTE (1 : 1 : 4, v/v/v) (0.4 M-114) are much better than in 0.4 M LiPF6–EC/DMC (1 : 1, v/v), and even better than in the conventional electrolyte (1 M LiPF6–EC/DMC (1 : 1, v/v)). The graphite‖LiNi0.5Co0.2Mn0.3O2 (NCM523) pouch cells using the 0.4 M-114 electrolyte show excellent cycling and safety performances, demonstrating the feasibility of using the nonflammable LCEs in practical applications. This work provides a nonflammable low-concentration electrolyte for lithium-ion batteries (LIBs) and provides a new insight into the development of electrolytes for LIBs.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
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IF 5.107
Shaofang Hu,Ying Sun,Min Pu,Rongping Yun,Xu Xiang
The high Mg/Li ratio in salt lake brine in China remains a challenge for the efficient separation of Mg and Li and the Li extraction. A reaction-coupled separation technology we proposed has been successfully applied to the highly efficient separation of Mg and Li from the brine. In this work, we conducted intensive investigations both experimentally and theoretically on the boundary conditions of Mg/Li separation from the brine in association with the initial Mg/Al ratio and Mg/Li ratio. We analyzed the relationship between the composition and the formation of precipitates by changing the Mg/Al molar ratio and the Mg/Li mass ratio in feedstock solution to determine the boundary conditions. The experimental results show that the Mg/Al molar ratio in the initial solution has a great influence on the separation of magnesium and lithium. It is evident that lithium enters the solid as a LiAl-layered double hydroxides (LiAl-LDHs) phase when the Mg/Al molar ratio is less than 2. It has also been found that the precipitate is independent of the Mg/Li mass ratio. From the theoretical results, it has been determined that an increase in the number of Li + clusters results in a decrease of the binding energy in the same system. Al 3+ prefers to combine with Mg 2+ to form MgAl-LDH clusters. However, when the Mg/Al ratio is lower than 2:1, Li + can form a cluster of LiAl-LDH layer. It can also be seen that different Li + numbers do not change the formation of clusters. Good agreement was found between the theoretical simulation results and the experimental data. This work provides a key criterion for the efficient separation of magnesium and lithium from the brine by a reaction-coupled separation technology.
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
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2022
·
IF 3.269
Jian Yang,Jiangtao Wu
This work contributes to the experimental measurements and modelling of the surface tension for the medium- to long-chained hydrocarbon mixtures involved in the Fischer-Tropsch process under the high-temperature conditions. For this purpose, the experimental surface tension measurements for the four investigated binary mixtures of n -Hexadecane with n -Dodecane, 2,2,4,4,6,8,8-Heptamethylnonane, n -Octacosane and Squalane were performed by pendant drop method at temperatures up to 573.15 K covering the mass fractions of w n -Hexadecane = (0.25, 0.50 and 0.75). The combined expanded uncertainties of temperature, mole fraction and surface tension with a level of confidence of 0.95 ( k = 2) are estimated to be 20 mK, within 0.6% and less than 2.2% over the entire temperature, respectively. On the basis of the surface tension correlations of pure substances in our previous study, the experimental surface tension data of the four investigated binary mixtures were correlated with the three-parameter Jouyban − Acree model and two-parameter Fu-Li-Wang (FLW) model. However, the experimental results show increasing negative deviations from Jouyban − Acree model with maximum values up to −2.66% and increasing positive deviations from FLW model with maximum values up to 9.93% in the high temperature zone. Therefore, we proposed a new model for correlating the surface tension of multicomponent mixtures with excellent reproducibility. The relative deviations of the experimental data from the present model are distributed evenly on both sides of the zero line and the relative absolute deviations are within 0.6%.
研究领域:
化学工程
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 21
·2972
·
IF 4.7
Qiankun Hun,Lingxiao Lan,Xuanan Lu,Qicheng Hu,Xinghua Liang,Yifeng Guo,Yujiang Wang
Solid-state electrolytes are widely anticipated to revitalize high-energy-density and high-safety lithium-ion batteries. However, low ionic conductivity and high interfacial resistance at room temperature pose challenges for their practical application. In this work, the dual-matrix concept is applied to the design of a bilayer heterogeneous structure. The electrolyte in contact with the cathode blends PVDF-HFP and oxidation-resistant PAN. In contrast, the electrolyte in contact with the anode blends PVDF-HFP and reduction-resistant PEO. A UV-curing process was used to fabricate the bilayer heterostructure electrolyte. The heterostructure electrolyte exhibits an ionic conductivity of 4.27 × 10−4S/cm and a Li+transference number of 0.68 at room temperature. Additionally, when assembled into LiFePO4/CPEs/Li batteries, it shows a high initial discharge capacity at room temperature (168 mAh g−1at 0.1 C and 60 mAh g−1at 2 C), with a capacity retention of 93.3% after 100 cycles at a current density of 0.2 C. Notably, at 60 °C, the battery maintains a discharge capacity of 90 mAh g−1at 2 C, with a capacity retention of 97.4% after 100 cycles at 0.2 C. Therefore, solid-state batteries using this bilayer heterogeneous structure electrolyte demonstrate promising performance, including effective capacity output and cycling stability.
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
PubMed
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-13
·
IF 16.6
Zhang Guangzhao,Chang Jian,Wang Liguang,Li Jiawei,Wang Chaoyang,Wang Ruo,Shi Guoli,Yu Kai,Huang Wei,Zheng Honghe,Wu Tianpin,Deng Yonghong,Lu Jun
The electrochemical stability window of the electrolyte solution limits the energy content of non-aqueous lithium metal batteries. In particular, although electrolytes comprising fluorinated solvents show good oxidation stability against high-voltage positive electrode active materials such as LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811), the ionic conductivity is adversely affected and, thus, the battery cycling performance at high current rates and low temperatures. To address these issues, here we report the design and synthesis of a monofluoride ether as an electrolyte solvent with Li-F and Li-O tridentate coordination chemistries. The monofluoro substituent (-CH 2 F) in the solvent molecule, differently from the difluoro (-CHF 2 ) and trifluoro (-CF 3 ) counterparts, improves the electrolyte ionic conductivity without narrowing the oxidation stability. Indeed, the electrolyte solution with the monofluoride ether solvent demonstrates good compatibility with positive and negative electrodes in a wide range of temperatures (i.e., from −60 °C to +60 °C) and at high charge/discharge rates (e.g., at 17.5 mA cm −2 ). Using this electrolyte solution, we assemble and test a 320 mAh Li||NCM811 multi-layer pouch cell, which delivers a specific energy of 426 Wh kg −1 (based on the weight of the entire cell) and capacity retention of 80% after 200 cycles at 0.8/8 mA cm −2 charge/discharge rate and 30 °C.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Ruzhen Zhao,Ziwen Ying,Hao Sun,Qifeng Wei,Xiulian Ren
Lithium extraction has become a hot topic because of global efforts to control carbon emissions. However, the efficient separation of Li/Na is a great challenge. In this study, the lithium carbonate precipitation mother liquor with Li + content of 1.7910 g/L and Na + content of 111.2438 g/L was used as the raw material solution. Due to its high Na/Li ratio, we found that the affinity of nonylphenol oxygen anion with Li + is stronger than that with Na + through quantum chemical analysis. And through the optimization of the effects of saponification degree, pH, temperature, and phase ratio, after twelve rounds of a five-stage countercurrent extraction, the E Li (%) reached 99% and the maximum β Li/Na reached 114799.73. After scrubbing with 0.5 mol/L HCl + 0.5 g/L LiCl solution and stripping with 2 mol/L HCl solution, Li + and Na + could be effectively separated. This study proved that nonylphenol oxygen anion had a significant effect on the extraction of Li + , and could effectively separate Li + from Na + , which brings a new idea for the treatment of high Na/Li solution.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Gels
·
2023
·Vol. 9
·期 5
·392
·
IF 4.6
Huaiyuan Dou,Quan Ye,Yan He,Xuemin Cui
Lithium batteries, as energy storage devices, are playing an increasingly important role in human society. As a result of the low safety of the liquid electrolyte in batteries, more attention has been paid to solid electrolytes. Based on the application of lithium zeolite in a Li-air battery, a non-hydrothermal conversed lithium molecular sieve was prepared. In this paper, in-situ infrared spectroscopy, together with other methods, was used to characterize the transformation process of geopolymer-based zeolite. The results showed that Li/Al = 1.1 and 60 °C were the best transformation conditions for the Li-ABW zeolite. On this basis, the geopolymer was crystallized after 50 min of reaction. This study proves that the formation of geopolymer-based zeolite occurs earlier than the solidification of the geopolymer and shows that the geopolymer is a good precursor for zeolite conversion. At the same time, it comes to the conclusion that the formation of zeolite will have an impact on the geopolymer gel. This article provides a simple preparation process for lithium zeolite, explores the preparation process and mechanism, and provides a theoretical basis for future applications.Keywords:in-situ infrared spectroscopy;non-hydrothermal transportation;Li-geopolymer;Li-ABW
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Qian Liu,Li Zhang,Xuna Liu,Zhongquan Zhong,Wei Deng,Ping Yang
Lithium ion-sieve with selective adsorption capacity is an important research direction in the field of recovering lithium from brine. The lithium ion-sieve precursor Li 1.6 Mn 1.6 O 4 was efficiently prepared using a combination of the hydrothermal method and solid-phase calcination. Subsequently, a highly adsorbent with high adsorption capacity was obtained through a process involving pickling and Li leaching. The impact of different preparation routes and conditions on both the intermediate product LiMnO 2 and the ion-sieve precursor Li 1.6 Mn 1.6 O 4 were investigated. Under conditions of 25 °C, pH 9, and an initial Li + concentration of 100 mg/L, the initial adsorption capacity and Mn dissolution loss are relatively optimal. After 10 cycles, the adsorption capacity stabilizes at 25–30 mg/g, However, Mn dissolution loss is unavoidable, it stabilizes between 2.0 % and 2.5 %. The selective adsorption of Li + remains effective even in the presence of Ca 2+ , Mg 2+ , Na + , and K + interference. Li desorption and Mn dissolution loss were investigated using density functional theory, Fukui function, electron orbital theory, and density of states. The introduction of H + during the pickling process induced structural modifications in the ion-sieve precursor Li 1.6 Mn 1.6 O 4 , leading to a decrease in Mn-Mn bonds, Mn-O bonds, and Li-O distances. Initially, Li + at each site of Li 1.6 Mn 1.6 O 4 had an equal probability of being replaced by H + . Subsequent desorption occurred far away from the desorption point. The loss of Mn 3+ in Li 1.6 Mn 1.6 O 4 resulted in an increased electrophilic attack index at the H + substitution site, and the 3d orbital electrons of Mn 3+ migrate to the 4d and 2p orbitals to seek stability.
研究领域:
材料科学
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环境科学
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化学工程
✓ 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）