JOURNAL OF ALLOYS AND COMPOUNDS
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2019
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IF 4.175
Junming Shao,Zhicheng Li,Yuan Zeng,Shiyuan Chen,Lin Yang,Hong Zhang
Taking into account of high energy density and safety, solid-state lithium-ion batteries (LIBs) are promising for next-generation energy storage devices and high-performance power sources, and the inorganic solid electrolyte is a key component in LIBs. Here, a new system of solid oxide electrolyte with a nominal composition of Li 29 Zr 9 Nb 3 O 40 (LZNO) and Al-doped LZNO are prepared through a sol-gel method and the related ionic conductivities are firstly investigated. All the prepared compounds have an orthorhombic structure. The pure LZNO shows a bulk conductivity of 1.75 × 10 −4 S cm −1 and a total conductivity of 5.90 × 10 −5 S cm −1 at 25 °C, and has low activation energy of conduction of 0.20 eV. The Al-doping enhances the total ionic conductivity up to 2.41 × 10 −4 S cm −1 at room temperature. The computational simulation by using bond valence site energy reveals that the LZNO crystal has 3D migration pathways including two-dimensional migration pathways along a - and c - orientations, as well as the migration b -direction one provided by the partially occupied O (8) sites.
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 ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Jiahao Chen,Hong Zhang,Lin Yang,Hongzhu Chen,Junming Shao,Zhicheng Li
Lithium ion batteries (LIBs) based on solid state electrolytes have attracted much attention for their high safety and energy density . Li 29 Zr 9 Nb 3 O 40 powders as Li-ionic conductors were prepared using a sol-gel method in this work, and the related ceramics were sintered in air or in an oxygen-deficient atmosphere in which sample was covered with corundum crucible. All the sintered ceramics are consisted of orthorhombic phase. Li 29 Zr 9 Nb 3 O 40 ceramic sintered in oxygen-deficient atmosphere has conductivity of 1.03 × 10 −3 S cm −1 at room temperature and has ionic transference number of 0.9996, while the ceramic sintered in air has conductivity of 4.41 × 10 −5 S cm −1 . The influence of oxygen vacancy on the migration path of Li-ion was discussed. The migration paths of Li-ions between two kinds of Li 29 Zr 9 Nb 3 O 40 ceramics were simulated and visualized by method of bond valence site energy with VESTA software.
研究领域:
材料科学
·
固态电解质研究
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产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2024
·Vol. 27
·期 24
·e202400137
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IF 2.2
Qing Liu,Haiqin Lin,Jie Zhao,Bingxue Zhou,Yudong Zhang,Can Cui,Jiangwei Shen,Weiji Dai,Cuijiao Zhao,Saifang Huang
Graphical This study presents an innovative approach in developing high-performance all-solid-state lithium-ion batteries by fabricating hybrid solid electrolyte (HSE) films using PEO as matrix and incorporating with garnet oxide and Li 29 Zr 9 Nb 3 O 40 powders. The research emphasizes on the significant enhancement in ionic conductivity, electrochemical stability, and interfacial compatibility of these HSEs, demonstrating their potential for flexible and safe energy storage solutions. Inorganic-organic hybrid solid electrolytes (HSEs) are an important category of electrolyte materials for solid-state batterie. It is of interest and importance to investigate the influence of composition and content of inorganic fillers on the electrochemical performance of HSEs. In this paper, we fabricated HSEs using polyethylene oxide (PEO) as matrix and incorporating different inorganic powders as active fillers. A series of HSEs with different contents of Ga/Nb co-substituted garnet oxide (Li 6.35 Ga 0.15 La 3 Zr 1.8 Nb 0.2 O 12 , GN-LLZO) and Y-doped Li 29 Zr 9 Nb 3 O 40 (Li 29.3 Zr 8.7 Y 0.3 Nb 3 O 40 , 0.3Y-LZNO) were carefully designed. The ionic conductivity of these PEO-based HSEs were studied, and their performance in solid-state lithium-ion batteries with LiFePO 4 (LFP) as cathode material and Li metal as anode were evaluated. The results showed that the HSE with addition content of inorganic powders, namely PEO LiTFSI @5 % GN-LLZO +5 %0.3Y-LZNO (noted as PL3) showed the optimized ionic conductivity of 2.9×10 −4 S cm −1 at room temperature with an activation energy E a of 0.21 eV. It has an electrochemical stability window of 4.65 V and ionic transfer number of 0.242. The addition of inorganic powders not only enhanced the ionic conductivities of PEO-based HSEs, but also exhibited superior stability and interfacial compatibility with electrodes, leading to the improved cycle stability in the LFP/PL3/Li solid-state battery configuration.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2022
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IF 9.794
Jiahao Chen,Hong Zhang,Hongzhu Chen,Enjie Xia,Yanmei Wu,Zhicheng Li
Solid-state Li-ion batteries (LIBs) have recently attracted much attention for their high safety and energy density . Polyvinylidene fluoride (PVDF) is as a potential electrolyte for solid-state LIBs due to its high permittivity, wide voltage window and excellent thermal stability. Here, Y 3+ -doped Li 29 Zr 9 Nb 3 O 40 (LZNO) Li-ionic conductor with room temperature conductivity (σ 25 ) of 1.26 × 10 −4 S cm −1 is prepared. LZNO decorated PVDF-based composite solid electrolytes (CSEs) are fabricated. The PVDF-based CSE with 10% (mass ratio) of LZNO shows σ 25 of 2.34 × 10 −4 S cm −1 , and has thermal stability with melting temperature up to 332 °C and voltage window of 4.8 V. The assembled Li ( Ni 0.8 Co 0.1 Mn 0.1 ) O 2 |CSE|Li cells show initial specific discharge capacity of 216.7 mAh g −1 at 0.1 C, and exhibit high capacity and cycle performance. LiFePO 4 |CSE|Li cells display initial specific discharge capacity of 137.4 mAh g −1 at 0.5 C and high cycle performance. Addition of LZNO powder in CSEs can inhibit the dehydrofluorination of PVDF during the charge-discharge of cells, alleviate the deterioration of interface resistance, and greatly improve the specific discharge capacity of cells at high rates.
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
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 36
·26775-26787
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IF 2.779
Chen Hongzhu,Li Zhicheng,Chen Jiahao,Xia Enjie,Wu Yanmei,Zhang Hong
Lithium-ion batteries (LIBs) based on solid-state electrolytes have attracted much attention for their high safety and energy density. Li 29 Zr 9 Nb 3 O 40 (LZNO), as a new kind of Li-ion conductor, has great potential in applications of solid-state LIBs. In this work, various contents of LiF are selected to modify LZNO Li-ion conductor, and the optimal content of LiF is 5 wt% (weight%). The phase component, crystal structure, ionic conductivity, and electrochemical performance are investigated. The refinement of crystallographic information based on the bond valence site energy theory is induced to reveal the possible lithium-ion migration channel. The results show that modification with LiF enhanced the 3D migration pathways and conductivity of LZNO-based electrolytes. The 5 wt% LiF modified LZNO presents total conductivity of 0.943 × 10 −4 S cm −1 at ambient temperature and has low activation energy of conduction (0.16 eV). The cycle performance of the lithium symmetric cell characterizes the cycle of 140 h.
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）