Fabrication and topchemical transformation mechanism of PbTiO3 microplatelets

Li, Leilei; Wang, Jing; Guo, Qilong; Yang, Yongheng; Shi, Zongmo; Jia-dong, XU; Cao, Wanzhi; Gao, Feng

doi:10.1016/j.ceramint.2022.10.309

Cited by 5 publications

(3 citation statements)

References 24 publications

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“…Moreover, the peaks of C-F at 1029 and 1155 cm −1 show gradually blue shift to higher wavenumbers with increased LATP amounts, which should be due to the chemical interaction of acidic groups on the LATP surface with the stretching C─F bond. [31] To further determine the effect of PEO and LATP on the crystallinity of the PHP-Lx membranes, diffevential scanning calovimltry (DSC) was tested. The glass transport temperature (Tg) decreased from 145.4 °C for PH to 143.3 °C for PHP, which continuedly decreases to 137.4 °C by increasing the LATP content (Figure 3d), suggesting that the crystallinities of the samples gradually decrease with introducing PEO and LATP.…”

Section: Resultsmentioning

confidence: 99%

Designing Compatible Ceramic/Polymer Composite Solid‐State Electrolyte for Stable Silicon Nanosheet Anodes

Liu,

Wang,

Wang

et al. 2024

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The commercialization of silicon anode for lithium‐ion batteries has been hindered by severe structure fracture and continuous interfacial reaction against liquid electrolytes, which can be mitigated by solid‐state electrolytes. However, rigid ceramic electrolyte suffers from large electrolyte/electrode interfacial resistance, and polymer electrolyte undergoes poor ionic conductivity, both of which are worsened by volume expansion of silicon. Herein, by dispersing Li1.3Al0.3Ti1.7(PO4)3 (LATP) into poly(vinylidene fluoride)‐hexafluoropropylene (PVDF‐HFP) and poly(ethylene oxide) (PEO) matrix, the PVDF‐HFP/PEO/LATP (PHP‐L) solid‐state electrolyte with high ionic conductivity (1.40 × 10−3 S cm−1), high tensile strength and flexibility is designed, achieving brilliant compatibility with silicon nanosheets. The chemical interactions between PVDF‐HFP and PEO, LATP increase amorphous degree of polymer, accelerating Li+ transfer. Good flexibility of the PHP‐L contributes to adaptive structure variation of electrolyte with silicon expansion/shrinkage, ensuring swift interfacial ions transfer. Moreover, the solid membrane with high tensile limits electrode structural degradation and eliminates continuous interfacial growth to form stable 2D solid electrolyte interface (SEI) film, achieving superior cyclic performance to liquid electrolytes. The Si//PHP‐L15//LiFePO4 solid‐state full‐cell exhibits stable lithium storage with 81% capacity retention after 100 cycles. This work demonstrates the effectiveness of composite solid electrolyte in addressing fundamental interfacial and performance challenges of silicon anodes.

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Section: Resultsmentioning

confidence: 99%

Designing Compatible Ceramic/Polymer Composite Solid‐State Electrolyte for Stable Silicon Nanosheet Anodes

Liu,

Wang,

Wang

et al. 2024

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“…In the first step, a precursor of plate-like Bi 4 Ti 3 O 12 microcrystals with a high aspect ratio was prepared according to the reaction eq 1. Then the perovskite Sr 0.9 La 0.1 13,17 show that the moderate excess of SrCO 3 would promote the chemical conversion, and the molar ratio of Bi 4 Ti 3 O 12 precursors to (0.9SrCO 3 + 0.05La 2 O 3 ) is 1:4.5 in the TMC process. Therefore, the SrCO 3 and La 2 O 3 were mixed with equal masses of KCl in absolute ethyl alcohol through ball milling for 12 h. To avoid damaging the flaky morphology of the precursor, we mixed the Bi 4 Ti 3 O 12 platelets with the above mixture of reactants and salts via magnetic stirring at 300 rpm for 4 h. After being dried, the precursor mixture was heated to 700−1200 °C in a box furnace for molten salt reaction and holding for 3 h. Subsequently, the molten salt medium, excess SrO and La 2 O 3 , and byproduct Bi 2 O 3 were washed repeatedly with deionized water and 30% HNO 3 .…”

Section: Methodsmentioning

confidence: 99%

“…The TMC method mainly induces a local structural transformation by exchanging, deleting, or inserting specific atoms to preserve the morphology characteristics of low-dimensional precursors. At present, the perovskite structure microplatelets such as SrTiO 3 , – PbTiO 3 , and BaTiO 3 have been successfully synthesized by the TMC method. Among the thermoelectric materials (TEs), SrTiO 3 has attracted extensive attention as a competitive n-type TE because of its outstanding high power factor of 3600 μW/(m·K 2 ), cost effectiveness, eco-friendly feature, high chemical stability, and high temperature thermally stability.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Electrical Conductivity of (001) Oriented Sr_0.9La_0.1TiO₃ Microplatelets for Thermoelectric Applications

Zhang,

Chen,

Lou

et al. 2023

Inorg. Chem.

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Two-dimensional perovskite microplatelets have played an important role in various applications, especially acting as a template to guide grains' epitaxial growth in the preparation of textured ceramics. The (001) oriented Sr 0.9 La 0.1 TiO 3 microplatelets with a high aspect ratio of ∼20 were synthesized and obtained from Aurivillius Bi 4 Ti 3 O 12 precursors. To reveal the mechanism of topochemical microcrystal conversion of Bi 4 Ti 3 O 12 to Sr 0.9 La 0.1 TiO 3 , the reaction interface, morphology development, and phase composition evolution of the (001) oriented Sr 0.9 La 0.1 TiO 3 microplatelets were investigated. When the temperature of the molten salt is above 753 °C, multiple Sr 0.9 La 0.1 TiO 3 topological nucleation events took place. At 950 °C, the polycrystalline aggregate of (001)oriented Sr 0.9 La 0.1 TiO 3 crystallites grew in place of the original single crystal Bi 4 Ti 3 O 12 platelets. When the temperature reached 1150 °C, the Sr 0.9 La 0.1 TiO 3 platelets preserved the shape of a high aspect ratio and exhibited not only enhanced electrical conductivity with a carrier concentration of 3.518 × 10 20 cm −3 and carrier mobility of 8.460 cm 2 •V −1 •s −1 but also significantly decreased thermal conductivity ranging from 5.65 W•m −1 •K −1 at 300 K to 2.54 W•m −1 •K −1 at 1073 K. It can be widely applied in the field of template grain growth methods for preparing textured thermoelectric ceramics to improve their thermoelectric properties.

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Oriented and ultrafine-grain potassium sodium niobate piezoelectric ceramics prepared by heterogeneous microcrystalline transformation

Liu

Jiang

et al. 2023

Ceramics International

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Fabrication and topchemical transformation mechanism of PbTiO3 microplatelets

Cited by 5 publications

References 24 publications

Designing Compatible Ceramic/Polymer Composite Solid‐State Electrolyte for Stable Silicon Nanosheet Anodes

Designing Compatible Ceramic/Polymer Composite Solid‐State Electrolyte for Stable Silicon Nanosheet Anodes

Enhanced Electrical Conductivity of (001) Oriented Sr_0.9La_0.1TiO₃ Microplatelets for Thermoelectric Applications

Oriented and ultrafine-grain potassium sodium niobate piezoelectric ceramics prepared by heterogeneous microcrystalline transformation

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Fabrication and topchemical transformation mechanism of PbTiO3 microplatelets

Cited by 5 publications

References 24 publications

Designing Compatible Ceramic/Polymer Composite Solid‐State Electrolyte for Stable Silicon Nanosheet Anodes

Designing Compatible Ceramic/Polymer Composite Solid‐State Electrolyte for Stable Silicon Nanosheet Anodes

Enhanced Electrical Conductivity of (001) Oriented Sr0.9La0.1TiO3 Microplatelets for Thermoelectric Applications

Oriented and ultrafine-grain potassium sodium niobate piezoelectric ceramics prepared by heterogeneous microcrystalline transformation

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Enhanced Electrical Conductivity of (001) Oriented Sr_0.9La_0.1TiO₃ Microplatelets for Thermoelectric Applications