图1.常规锂离子电池（a）和全固态锂离子电池（b）的示意图。
图2.搜索具有高离子电导率和高成形性的固体电解质材料的详尽计算结果。
名古屋工业大学：新型全固态LiB材料的开发：内部密度94％
-有效抑制金属锂短路：实现新型氯化物固体电解质和安全的车载电池-
名古屋工业大学：
我们开发了高成型性氯化物固体电解质材料。
具有高能量密度的锂金属电极（* 2）实现了稳定的充电/放电循环。
氯化物固体电解质材料：
设置固体电解质材料所需的物理性能指标。
对于结构数据库中的材料，我们进行了综合计算并搜索了有效的材料。
在里面
我们成功地“合成了常温常压惰性气体”，用于需要高温处理的有毒气体和氯化物材料。
此外，在仅使用压实粉末且环境负荷低的工艺中，我们能够“减少短路现象，这是锂金属负极的问题”。
固体电解质是关键：
在全固态电池中实现高能量密度的关键是“锂离子在固体中传导的固体电解质”。
这种新材料可实现所有固态电池的高能量密度。
名古屋工业大学
https://www.nitech.ac.jp/news/press/2020/8406.html
Metastable Chloride Solid Electrolyte with High Formability for Rechargeable All-Solid-State Lithium Metal Batteries
Naoto Tanibata*, Shuta Takimoto, Koki Nakano, Hayami Takeda, Masanobu Nakayama, and Hirofumi SumiACS Materials Letters
Abstract
Dense solid electrolytes in all-solid-state Li batteries
are expected to suppress Li dendrite phenomena that prevent the application of high-energy-density Li metal electrodes.
However, voids and cracks in sintered electrolytes still permit short-circuiting due to Li dendrites.
This study aimed to investigate solid electrolytes with high formability in which green compacts can prevent Li dendrites.
Li+ ion migration energies, bulk moduli, and energies above the hull
were comprehensively investigated using first-principles and classical force field calculations as the indicators for ionic conductivity, formability, and thermodynamic stability.
The 231 compounds containing Li and Cl listed in the Materials Project database were studied due to their high polarizability and weak Coulombic interaction with Li+ ions.
Among them, monoclinic LiAlCl4 (LAC, S.G.: P121/c1) was focused on, owing to its low values of all three indicators.
A mechanochemical synthesis
was attempted to prepare the metastable phase, where Li ions occupy the interstitial sites, not just the original sites, because the computation for the migration energy suggested conductive pathways between the original Li sites.
XRD and 7Li-MAS NMR measurements indicated that
the mechanochemically synthesized LAC possessed a monoclinic host structure, while 2.5% Li occupied interstitial tetrahedral sites.
Impedance measurements
showed that the LAC green compacts exhibited an ionic conductivity of 2.1 × 10–5 S cm–1, 20 times higher than the conventional solid-state synthesized LAC at room temperature.
The conductivity
was more than one order of magnitude higher than that of garnet-type Li6.6La3Zr1.6Ta0.4O12 (LLZT), which has been attractive for the application of the sintered body for Li metal electrodes.