JOURNAL OF RARE EARTHS
·
2022
·
IF 4.632
Xiaojuan Lu,Mingyang Duan,Jingyu Xiang,Yuning Liang,Songtao Liu
Although solid-state lithium electrolytes have the potential to reduce the safety issues associated with organic liquid electrolytes , disadvantages such as low total conductivity, large interface impedance, and delamination of the interface due to cyclic stress still need to be addressed. The solid-state lithium-ion conductor Li 0.33 La 0.56 TiO 3 (LLTO) was prepared via a hydrothermal route by using CTAB as templates in this paper. Perovskite LLTO with micro-porous channels was obtained and the total conductivity is comparable to the non-porous LLTO. Porous LLTO pellets are infiltrated with the non-porous LLTO precursor solution, and the total conductivities of the infiltrated porous LLTO are all higher than those without infiltration. After infiltration, the porous LLTO calcined at 600 °C achieves the highest total conductivity, 7.88 × 10 −5 S/cm. The fracture toughness of the infiltrated LLTO is higher than that of the non-porous LLTO. The results demonstrate a new way to prepare solid-state lithium-ion conductors with high ionic conductivity and great tolerance to cyclic stress.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2025
·
IF 5.7
Xiaojuan Lu,Jialin Yang,Ke Huang,Songtao Liu
Template-regulated Li 0.33 La 0.56 TiO 3 (LLTO) powders are synthesized using CTAB via a hydrothermal method. The hybird LLTO is obtained by mixing the template-regulated LLTO powders with Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 (LATP) powders and non-templated LLTO powders. In the non-templated LLTO, small round grains develop, while large grains with a high aspect ratio tend to form in the template-regulated LLTO. The total conductivity of the hybrid LLTO increases, reaching 1.28×10 −4 S cm −1 . The presence of specific mesopores and the bridging effect among grains create an optimal balance between the mobility and density of lithium ions, therefore contributing to the increase of the conductivity. The hybrid LLTO demonstrates improved higher fracture toughness, indicating a greater cycling tolerance. It also exhibits superior initial capacity and a slower degradation rate. These results present a novel approach to prepare lithium-ion conductors with enhanced performance.
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 SOLID STATE ELECTROCHEMISTRY
·
2023
·Vol. 27
·期 6
·1501-1510
·
IF 2.5
Wu Yonglin,Cui Hongdi,Liu Xiaojuan,Zhong Xiaohui,Li Zhifeng,Wang Chunxiang,Dmytro Sydorov
Ni-rich layered cathode materials LiNi x Co y Mn (1-x–y) O 2 (x ≥ 0.8) suffer from capacity decay due to structural deterioration during electrochemical cycling. To overcome these problems, the fast-ion conductor Li 0.33 La 0.56 TiO 3 (LLTO) is coated on the surface of LiNi 0.83 Co 0.12 Mn 0.05 O 2 (NCM83) cathodes through the sol–gel method, which can stabilize the electrode/electrolyte interface of cathode materials and facilitate Li + transport and charge transfer. As a result, the LLTO-coated NCM83 exhibits better cycle stability and higher rate performance. The NCM83 modified by 5 wt% LLTO has the discharge capacity of 185.9 mAh g −1 at 1C rate after 100 cycles and with higher capacity retention of 92.9% than the pristine NCM83 of 86.2%, and as well as the 5 wt% LLTO-coated NCM83 has a higher Li + -insert diffusion coefficient of 1.143 × 10 −11 cm 2 s −1 than the pristine NCM83 of 8.757 × 10 −12 cm 2 s −1 . Therefore, the fast-ion conductor LLTO coating strategy shows great potential in improving the performance of Ni-rich layered cathode materials.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米技术
·
应用物理学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 11
·9074-9079
·
IF 3.201
Zhixiong Hu,Jiali Sheng,Jiahui Chen,Guoqing Sheng,Yunming Li,Xian-Zhu Fu,Lei Wang,Rong Sun,Ching-Ping Wong
Ge-Doped Li0.33La0.56TiO3 (Ge-LLTO) perovskites are synthesized with various GeO2 contents by solid-state reactions as Li-ion conductive electrolytes for rechargeable all-solid-state Li batteries. After the addition of GeO2, the sinterability and Li ion conductivity are enhanced for the perovskite solid electrolyte. The Li0.43La0.56Ti0.95Ge0.05O3 electrolytes exhibit the highest sinterability and Li ion conductivity among the as-prepared Li0.33+2xLa0.56Ti1−xGexO3 electrolytes. The improvement of Li ion conductivity might be attributed to the improvement of the densification and structural integrity of the LLTO solid electrolyte. The lithium transference number (tLi+) of Ge-doped LLTO is close to 1. Moreover, the Ge-LLTO electrolytes are stable in the potential range of 0–10 V vs. Li/Li+.
研究领域:
材料科学
·
电化学
·
储能技术
·
固体离子学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Shuo Li,Wenshuo Hou,Xuting Li,Chuanlong Li,Tao Han,Xinzhao Yue,Fulu Chu,Linrui Hou,Changzhou Yuan
Composite solid-state electrolytes (CSEs) are highly promising for lithium-metal batteries (LMBs) but suffer from low ionic conductivity, limited mechanical strength, and unstable interfaces with lithium metal. A multi-functional perovskite filler, Li 0.33 La 0.56 Ti 0.95 Al 0.01 Zr 0.04 O 3 (AZ-LLTO), is incorporated into a solid polymer electrolyte. This filler is engineered via an Al 3+ /Zr 4+ co-doping strategy that synergistically optimizes bulk and grain boundary properties, enabling simultaneous enhancement of bulk ion transport and stabilization of the Li/electrolyte interface. Al 3+ doping generates oxygen vacancies facilitating Li + migration through the perovskite lattice, thereby enhancing bulk ionic conductivity. Concurrently, Zr 4+ doping suppresses La 3+ segregation at grain boundaries, reducing interfacial resistance and favoring Li + transport across grain boundaries. The resultant AZ-LLTO-based composite solid electrolyte achieves a high room-temperature ionic conductivity of 2.3 × 10 −4 S cm −1 , a Li + transference number of 0.42, and stable Li deposition/stripping in Li/CSE-AZ-LLTO/Li symmetric cells for over 3100 h at 0.1 mA cm −2 . Thus, LiFePO 4 /CSE-AZ-LLTO/Li battery delivers an initial capacity of 146.9 mAh g −1 at 0.2 C and retains 85% of its capacity after 200 cycles, demonstrating the practical viability of this designed co-doped perovskite filler. Our work establishes a rational co-doping paradigm for perovskite-based fillers to concurrently enhance bulk conduction and interfacial compatibility in CSEs for next-generation LMBs.
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2021
·
IF 3.512
Wen Zheng,Wanying Bi,Yaobing Fang,Shuya Chang,Wenhui Yuan,Li Li
Based on the advantages of intrinsic safety, flexibility, and good interfacial contact with electrodes, a gel polymer electrolyte (GPE) is a promising electrolyte for lithium-ion batteries, compared with the conventional liquid electrolyte. However, the unstable electrochemical performance and the liquid state in a microscale limit the commercial application of GPE. Herein, we developed a novel gel polymer electrolyte for lithium-ion batteries by blending methyl methacrylate (MMA), N-butyl-N-methyl-piperidinium (Pyr14TFSI), and lithium salts in a solvent-free procedure, with SiO2 and Li0.33La0.56TiO3 (LLTO) additives. The prepared MMA-Pyr14TFSI-3 wt % LLTO electrolyte shows the best electrochemical performance and obtains a high ion conductivity of 4.51 × 10–3 S cm–1 at a temperature of 60 °C. Notably, the electrochemical window could be stable up to 5.0 V vs Li+/Li. Moreover, the batteries with the GPE also show excellent electrochemical performance. In the LiFePO4/MMA-Pyr14TFSI-3 wt % LLTO/Li cell, a high initial discharge capacity was achieved 150 mA h g–1 at 0.5C with a Coulombic efficiency over 99% and maintaining a good capacity retention of 90.7% after 100 cycles at 0.5C under 60 °C. In addition, the physical properties of the GPE have been investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD) measurements, Fourier transform infrared (FTIR) spectroscopy, and thermogravimetry (TG).
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Xiaojuan Lu,Feng Zhang,Jing Li
Perovskite-type lithium-ion conductor Li 0.33 La 0.56 TiO 3 was prepared via microwave sintering. The influence of lithium sources on the properties of the samples prepared and the compensation of lithium loss were investigated. XRD patterns, exhibiting a mixture of tetragonal and cubic phase, were all similar for the samples made with different lithium sources. The total conductivity of the sample made with Li 2 CO 3 achieved 0.51 × 10 −4 S/cm, which was the highest among all the samples made with different sources. The highest total conductivity of the sample made with Li 2 CO 3 was attributed to the largest grains, which would result in a smaller concentration of less-conductive grain boundaries. The total conductivity of the sample compensated with 5% Li 2 O was 38% higher than the sample made stoichiometrically. Given that grain sizes were similar for the samples compensated with a varied amount of Li 2 O and the relative density of the sample compensated with 5% Li 2 O was even the lowest among these samples, the highest total conductivity was rooted in the highest ratio of cubic phase. These results indicated that lithium sources could influence the properties of the LLTO samples greatly by resulting in a variation on crystalline phase, grain size, and relative density, which collectively determine the migration of lithium ions in polycrystalline Li 0.33 La 0.56 TiO 3 .
研究领域:
材料科学
·
固体化学
·
电化学
✓ 已验证
DOI
高影响因子
Nature Nanotechnology
·
2023
·Vol. 18
·期 6
·602-610
·
IF 38.3
Shi Peiran,Ma Jiabin,Liu Ming,Guo Shaoke,Huang Yanfei,Wang Shuwei,Zhang Lihan,Chen Likun,Yang Ke,Liu Xiaotong,Li Yuhang,An Xufei,Zhang Danfeng,Cheng Xing,Li Qidong,Lv Wei,Zhong Guiming,He Yan-Bing,Kang Feiyu
The ionic conductivity of composite solid-state electrolytes does not meet the application requirements of solid-state lithium (Li) metal batteries owing to the harsh space charge layer of different phases and low concentration of movable Li + . Herein, we propose a robust strategy for creating high-throughput Li + transport pathways by coupling the ceramic dielectric and electrolyte to overcome the low ionic conductivity challenge of composite solid-state electrolytes. A highly conductive and dielectric composite solid-state electrolyte is constructed by compositing the poly(vinylidene difluoride) matrix and the BaTiO 3 –Li 0.33 La 0.56 TiO 3– x nanowires with a side-by-side heterojunction structure (PVBL). The polarized dielectric BaTiO 3 greatly promotes the dissociation of Li salt to produce more movable Li + , which locally and spontaneously transfers across the interface to coupled Li 0.33 La 0.56 TiO 3– x for highly efficient transport. The BaTiO 3 –Li 0.33 La 0.56 TiO 3– x effectively restrains the formation of the space charge layer with poly(vinylidene difluoride). These coupling effects contribute to a quite high ionic conductivity (8.2 × 10 −4 S cm −1 ) and lithium transference number (0.57) of the PVBL at 25 °C. The PVBL also homogenizes the interfacial electric field with electrodes. The LiNi 0.8 Co 0.1 Mn 0.1 O 2 /PVBL/Li solid-state batteries stably cycle 1,500 times at a current density of 180 mA g − 1 , and pouch batteries also exhibit an excellent electrochemical and safety performance.
研究领域:
材料科学
·
电化学
·
电池技术
·
固态电解质
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）