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Garnet type oxide electrolyte, preparation method thereof and lithium ion battery
The invention discloses a garnet type oxide electrolyte, a preparation method thereof and a lithium ion battery. On one hand, the invention provides the preparation method of the garnet type oxide electrolyte. The preparation method comprises the following steps: taking preparation raw materials, and preparing the garnet type oxide electrolyte by adopting a solid-phase sintering method, wherein the preparation raw materials comprise a doping agent, the doping agent being lithium sulfide, and based on the total mass of the garnet type oxide electrolyte, the mass of the lithium sulfide being 1-10 wt%. By doping the lithium sulfide, the sulfur element partially replaces the oxygen element, and the radius of the crystal structure is increased, so that the whole unit cell is slightly increased, and the transmission of lithium ions is facilitated. And on the other hand, the partially substituted structure is extremely easy to form a tetragonal phase due to lack of lithium, so that the sulfur element forms a cubic phase when entering a crystal structure to be substituted by supplementing lithium in lithium sulfide, and the two elements of the dopant synergistically improve the conductivity of the finally prepared solid electrolyte.
本申请公开了提供石榴石型氧化物电解质及其制备方法和锂离子电池。本申请的第一方面提供石榴石型氧化物电解质的制备方法，包括以下步骤：取制备原料采用固相烧结法制备得到石榴石型氧化物电解质；其中，制备原料包括掺杂剂，掺杂剂为硫化锂，基于石榴石型氧化物电解质的总质量，硫化锂的质量为1～10wt％。通过硫化锂的掺杂，硫元素部分取代氧元素，晶体结构的半径变大，从而使得晶胞整体稍稍变大，利于锂离子的传输。而另一方面，部分取代后的结构极易因缺锂而形成四方相，因而通过硫化锂中锂的补充使得硫元素在进入晶体结构中发生取代时，形成立方相从而使得掺杂剂的两种元素协同提高最终制备得到的固态电解质的电导率。
Garnet type oxide electrolyte, preparation method thereof and lithium ion battery
The invention discloses a garnet type oxide electrolyte, a preparation method thereof and a lithium ion battery. On one hand, the invention provides the preparation method of the garnet type oxide electrolyte. The preparation method comprises the following steps: taking preparation raw materials, and preparing the garnet type oxide electrolyte by adopting a solid-phase sintering method, wherein the preparation raw materials comprise a doping agent, the doping agent being lithium sulfide, and based on the total mass of the garnet type oxide electrolyte, the mass of the lithium sulfide being 1-10 wt%. By doping the lithium sulfide, the sulfur element partially replaces the oxygen element, and the radius of the crystal structure is increased, so that the whole unit cell is slightly increased, and the transmission of lithium ions is facilitated. And on the other hand, the partially substituted structure is extremely easy to form a tetragonal phase due to lack of lithium, so that the sulfur element forms a cubic phase when entering a crystal structure to be substituted by supplementing lithium in lithium sulfide, and the two elements of the dopant synergistically improve the conductivity of the finally prepared solid electrolyte.
本申请公开了提供石榴石型氧化物电解质及其制备方法和锂离子电池。本申请的第一方面提供石榴石型氧化物电解质的制备方法，包括以下步骤：取制备原料采用固相烧结法制备得到石榴石型氧化物电解质；其中，制备原料包括掺杂剂，掺杂剂为硫化锂，基于石榴石型氧化物电解质的总质量，硫化锂的质量为1～10wt％。通过硫化锂的掺杂，硫元素部分取代氧元素，晶体结构的半径变大，从而使得晶胞整体稍稍变大，利于锂离子的传输。而另一方面，部分取代后的结构极易因缺锂而形成四方相，因而通过硫化锂中锂的补充使得硫元素在进入晶体结构中发生取代时，形成立方相从而使得掺杂剂的两种元素协同提高最终制备得到的固态电解质的电导率。
Garnet type oxide electrolyte, preparation method thereof and lithium ion battery
石榴石型氧化物电解质及其制备方法和锂离子电池
XIONG WEIQIANG (author) / XIE PU (author) / SHI XINGJU (author) / LI YANHONG (author) / SHANG XU (author) / LIANG SHISHUO (author)
2021-07-13
Patent
Electronic Resource
Chinese
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