Fabrication of transparent ultrathin films with ordered solid luminescence by LBL assembly of CdTe quantum dots with exfoliated vermiculite

You, Houmei; Zhang, Kewei; Zhang, Xiangkun; Ding, Haiyan; Shen, Yiwen; Yang, Feng; Hou, Jinpeng; WeiliangTian,

doi:10.1016/j.clay.2022.106710

Cited by 2 publications

(1 citation statement)

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“…Typically, the VMTs have a layered phyllosilicate structure that is crystallized in a monoclinic system (space group 2/ m ) [ 34 ]. The phyllosilicate structure is composed of alternate tetrahedral-octahedral-tetrahedral aluminosilicate layers [ 35 ]. Interestingly, the interlayer space of VMTs is quite different from other clays which contain two water layers and exchangeable cations, such as Na + , K + , Mg 2+ , and Ca 2+ [ 36 , 37 , 38 ].…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Two-Dimensional Natural Vermiculite Films for High-Performance Solid-State Electrolytes

et al. 2023

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Ceramic electrolytes hold application prospects in all-solid-state lithium batteries (ASSLB). However, the ionic conductivity of ceramic electrolytes is limited by their large thickness and intrinsic resistance. To cope with this challenge, a two-dimensional (2D) vermiculite film has been successfully prepared by self-assembling expanded vermiculite nanosheets. The raw vermiculite mineral is first exfoliated to thin sheets of several atomic layers with about 1.2 nm interlayer channels by a thermal expansion and ionic exchanging treatment. Then, through vacuum filtration, the ion-exchanged expanded vermiculite (IEVMT) sheets can be assembled into thin films with a controllable thickness. Benefiting from the thin thickness and naturally lamellar framework, the as-prepared IEVMT thin film exhibits excellent ionic conductivity of 0.310 S·cm−1 at 600 °C with low excitation energy. In addition, the IEVMT thin film demonstrates good mechanical and thermal stability with a low coefficient of friction of 0.51 and a low thermal conductivity of 3.9 × 10−3 W·m−1·K−1. This reveals that reducing the thickness and utilizing the framework is effective in increasing the ionic conductivity and provides a promising stable and low-cost candidate for high-performance solid electrolytes.

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