Sulfide Glass‐Ceramic Electrolytes for All‐Solid‐State Lithium and Sodium Batteries
Sulfide Glass‐Ceramic Electrolytes for All‐Solid‐State Lithium and Sodium Batteries
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DOI：
10.1111/ijag.12084
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发表时间：
2014-09
影响因子：
2.1
通讯作者：
M. Tatsumisago;A. Hayashi
中科院分区：
文献类型：
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作者：
M. Tatsumisago;A. Hayashi
近十年来开发了具有Li+或Na+离子传导功能的硫化物微晶玻璃电解质。 Li7P3S11和立方Na3PS4的高温相从母玻璃中析出，所得微晶玻璃表现出比母玻璃更高的电导率。通过传统的固相反应很难合成这些高温相，因此玻璃电解质作为形成高温相的前体是重要的。在硫化物玻璃陶瓷电解质中，25°C 时，Li+ 离子导体 (Li7P3S11) 的最高电导率为 1.1 × 10−2 S/cm，Na+ 离子导体 (Na3.06P0.94Si0.06S4) 的最高电导率为 7.4 × 10−4 S/cm。在室温下通过冷压制备了具有硫化物玻璃陶瓷电解质的全固态电池。硫化物电解质具有良好的机械性能，无需热处理即可通过压制在固态电池中形成良好的固-固接触。使用硫化物玻璃陶瓷电解质的全固态Li-In/S和Na-Sn/TiS2电池可作为二次电池使用，并在室温下表现出良好的循环性能。
Sulfide glass-ceramic electrolytes with Li+ or Na+ ion conduction have been developed in last decade. High-temperature phases of Li7P3S11 and cubic Na3PS4 are precipitated from mother glasses, and the obtained glass-ceramics show higher conductivity than the mother glasses. It is difficult to synthesize those high-temperature phases by conventional solid-state reaction, and glass electrolytes are thus important as a precursor for forming high-temperature phases. The highest conductivities at 25°C of 1.1 × 10−2 S/cm for Li+ ion conductor (Li7P3S11) and 7.4 × 10−4 S/cm for Na+ ion conductor (Na3.06P0.94Si0.06S4) are achieved in sulfide glass-ceramic electrolytes. All-solid-state batteries with sulfide glass-ceramic electrolytes were fabricated by cold press at room temperature. Sulfide electrolytes have favorable mechanical properties to form favorable solid–solid contacts in solid-state batteries by pressing without heat treatment. All-solid-state Li-In/S and Na-Sn/TiS2 cells using sulfide glass-ceramic electrolytes operate as secondary batteries and exhibit good cycle performance at room temperature.