Porous Ga0.25Li6.25La3Zr2O12 frameworks by gelcasting–reaction sintering for high-performance hybrid quasi-solid lithium metal batteries

文献情報

出版日 2023-09-29

DOI 10.1039/D3TA04638A

インパクトファクター 12.732

著者

Ying Zhou, Ying Tian, Wen Wang, Yu Zhou

原文を見る

要旨

The poor interface between Li/LLZO leads to the easy penetration of lithium metal into the garnet-type electrolyte, which limits its application. A hybrid quasi-solid electrolyte (HQSE) composed of porous LLZO and liquid electrolyte (LE) can effectively solve the interface problem. In practice, the implementation of HQSE-based batteries typically necessitates the use of porous LLZO scaffolds that possess sufficient mechanical strength. Herein, a novel method was developed to prepare porous LLZO scaffolds by combining gel casting and in situ reaction sintering. The enhanced mass transfer effect of the Li2O liquid phase on the surface of LLZO particles in the early stages, as well as the LiGaO2 liquid phase at the grain boundaries in the later stages, would result in the rapid densification of porous LLZO. By controlling the sintering temperature, the degree of densification can be controlled, thereby achieving a balance between porosity and mechanical strength in the porous LLZO scaffolds. When the solid phase content is 27.5 vol%, the porous LLZO scaffold obtained by heating at 1050 °C for 2 h exhibits a porosity of 32.7% and a flexural strength of up to 46.5 MP. In addition, the HQSE exhibits a high room-temperature ionic conductivity of up to 2.06 × 10−3 S cm−1. The symmetric cells delivered high cycling stability of over 800 h for lithium plating and stripping at a current density of 0.5 mA cm−2 with a small polarization voltage of about 0.05 V. This method offers a new route toward constructing a range of 3D scaffolds with SSEs for quasi-solid-state battery applications.

掲載誌

Journal of Materials Chemistry A

CiteScore: 19.5

自己引用率: 4.7%

年間論文数: 2211

Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment