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Low-temperature sintering preparation method of Li3N-doped garnet type solid electrolyte sheet
The invention discloses a low-temperature sintering preparation method of a Li3N-doped garnet type solid electrolyte sheet, which comprises the following steps: mixing garnet type oxide powder and a lithium nitride additive according to a certain mass percentage, performing cold press molding, and sintering at a relatively low temperature to obtain the solid electrolyte sheet. The sintering temperature of the electrolyte sheet is far lower than that of a traditional garnet electrolyte sheet, the sintering time is greatly shortened, energy is saved, and the high-temperature loss of lithium is reduced; the lithium nitride can be filled in gaps of the garnet type oxide electrolyte sheet, so that the electrolyte sheet obtains relatively high relative density; due to the high ionic conductivity of lithium nitride, the whole material has better conductivity performance; lithium nitride and a metal negative electrode have good compatibility, so that the stability of the garnet type oxide electrolyte sheet to the negative electrode can be further improved; in addition, the preparation method is low in process cost, simple to operate, easy to repeat and suitable for large-scale commercial production.
本发明公开了一种Li3N掺杂的石榴石型固态电解质片低温烧结的制备方法，其中将石榴石型氧化物粉体和氮化锂添加剂按照一定的质量百分比进行混合后冷压成型，随后在相对较低的温度下烧结得到固态电解质片。该电解质片的烧结温度远低于传统石榴石电解质片的烧结温度且烧结时间大幅度降低，节约能源且减少了锂的高温损耗；氮化锂可填充在石榴石型氧化物电解质片的空隙内使电解质片获得较高的相对密度；由于氮化锂本身的高离子电导率使材料整体具备较优的电导率性能；由于氮化锂和金属负极具有良好的兼容性，可以进一步提高石榴石型氧化物电解质片对负极的稳定性；另外，该制备方法的工艺成本较低，操作简单，易于重复，适合大规模商业化生产。
Low-temperature sintering preparation method of Li3N-doped garnet type solid electrolyte sheet
The invention discloses a low-temperature sintering preparation method of a Li3N-doped garnet type solid electrolyte sheet, which comprises the following steps: mixing garnet type oxide powder and a lithium nitride additive according to a certain mass percentage, performing cold press molding, and sintering at a relatively low temperature to obtain the solid electrolyte sheet. The sintering temperature of the electrolyte sheet is far lower than that of a traditional garnet electrolyte sheet, the sintering time is greatly shortened, energy is saved, and the high-temperature loss of lithium is reduced; the lithium nitride can be filled in gaps of the garnet type oxide electrolyte sheet, so that the electrolyte sheet obtains relatively high relative density; due to the high ionic conductivity of lithium nitride, the whole material has better conductivity performance; lithium nitride and a metal negative electrode have good compatibility, so that the stability of the garnet type oxide electrolyte sheet to the negative electrode can be further improved; in addition, the preparation method is low in process cost, simple to operate, easy to repeat and suitable for large-scale commercial production.
本发明公开了一种Li3N掺杂的石榴石型固态电解质片低温烧结的制备方法，其中将石榴石型氧化物粉体和氮化锂添加剂按照一定的质量百分比进行混合后冷压成型，随后在相对较低的温度下烧结得到固态电解质片。该电解质片的烧结温度远低于传统石榴石电解质片的烧结温度且烧结时间大幅度降低，节约能源且减少了锂的高温损耗；氮化锂可填充在石榴石型氧化物电解质片的空隙内使电解质片获得较高的相对密度；由于氮化锂本身的高离子电导率使材料整体具备较优的电导率性能；由于氮化锂和金属负极具有良好的兼容性，可以进一步提高石榴石型氧化物电解质片对负极的稳定性；另外，该制备方法的工艺成本较低，操作简单，易于重复，适合大规模商业化生产。
Low-temperature sintering preparation method of Li3N-doped garnet type solid electrolyte sheet
一种Li3N掺杂的石榴石型固态电解质片低温烧结的制备方法
ZHENG SHIYOU (author) / ZHU YU (author) / PANG YUEPENG (author) / YANG JUNHE (author) / ZHANG DEPEI (author)
2023-12-01
Patent
Electronic Resource
Chinese
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