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13 pages, 10371 KB  
Article
Chemical Compatibility of Li1.3Al0.3Ti1.7(PO4)3 Solid-State Electrolyte Co-Sintered with Li4Ti5O12 Anode for Multilayer Ceramic Lithium Batteries
by Jiangtao Li, Mingsheng Ma, Ya Mao, Faqiang Zhang, Jingjing Feng, Yingchun Lyu, Tu Lan, Yongxiang Li and Zhifu Liu
Materials 2025, 18(4), 851; https://doi.org/10.3390/ma18040851 - 15 Feb 2025
Cited by 5 | Viewed by 4457
Abstract
Multilayer ceramic lithium batteries (MLCBs) are regarded as a new type of oxide-based all-solid-state microbattery for integrated circuits and various wearable devices. The chemical compatibility between the solid electrolyte and electrode active materials during the high-temperature co-sintering process is crucial for determining the [...] Read more.
Multilayer ceramic lithium batteries (MLCBs) are regarded as a new type of oxide-based all-solid-state microbattery for integrated circuits and various wearable devices. The chemical compatibility between the solid electrolyte and electrode active materials during the high-temperature co-sintering process is crucial for determining the structural stability and cycling performance of MLCBs. This study focuses on the typical MLCB composite electrodes composed of the NASICON-type Li1.3Al0.3Ti1.7(PO4)3 (LATP) solid electrolyte and the spinel-type Li4Ti5O12 (LTO) anode material. The thermal behavior, phase structure, morphological evolution, and elemental chemical states of these composite electrodes were systematically investigated over a co-sintering temperature range of 400–900 °C. The results indicate that the reactivity between LATP and LTO during co-sintering is primarily driven by the diffusion of Li from the LTO anode, leading to the formation of TiO2, Li3PO4, and LiTiOPO4. Furthermore, the co-sintered LATP-LTO multilayer composites reveal that the generation of Li3PO4 at the LATP/LTO interface facilitates their co-sintering integration at 800–900 °C, which is essential for the successful fabrication of MLCBs. These findings provide direct evidence and valuable references for the structural and performance optimization of MLCBs in the future. Full article
(This article belongs to the Special Issue 3D & 4D Printing in Engineering Applications, 2nd Edition)
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