Scalable Synthesis of Selenide Solid-State Electrolytes for Sodium-Ion Batteries
Scalable Synthesis of Selenide Solid-State Electrolytes for Sodium-Ion Batteries
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DOI：
10.1021/acs.inorgchem.3c01799
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发表时间：
2023-10-12
影响因子：
4.6
通讯作者：
Wolden，Colin A.
中科院分区：
文献类型：
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作者：
Vaselabadi，Saeed Ahmadi;Palmer，Katie;Wolden，Colin A.
采用高性能固态电解液(SSE)的固态钠离子电池具有制造成本低、安全性高等优点，被认为是当前锂离子电池的一种很有前途的替代品。固体电解质必须具有较高的化学/电化学稳定性和良好的离子导电性。在这项工作中，我们利用前驱体和溶剂工程设计了可扩展和低成本的溶液路线来生产空气稳定的硒锑酸钠(Na3SbSe4)。首先，展示了一条简单的歧化路线，用于生产Sb2Se3前体，然后通过两种不同的路线生成三元Na3SbSe4：酒精介导的氧化还原方法和碱胺-硫醇方法。在前者中，使用类似的氧化还原溶液与Sb_2Se_3、Se和NaOH偶联作为碱性试剂，在乙醇中成功地合成了电解液。在碱法中，利用胺-硫醇混合溶剂溶解元素Se和Na，并进一步与二元前驱体反应得到Na3SbSe4。这两种方法生产的电解液具有室温离子传导性(∼0.2ms cm-1)，与其他传统热机械方法报道的性能相当。这些新的溶液相方法展示了湿化学在生产全固态钠电池的硒基电解液方面的多样性和应用。
Solid-state sodium-ion batteries employing superionic solid-state electrolytes (SSEs) offer low manufacturing costs and improved safety and are considered to be a promising alternative to current Li-ion batteries. Solid-state electrolytes must have high chemical/electrochemical stability and superior ionic conductivity. In this work, we employed precursor and solvent engineering to design scalable and cost-efficient solution routes to produce air-stable sodium selenoantimonate (Na3SbSe4). First, a simple metathesis route is demonstrated for the production of the Sb2Se3precursor that is subsequently used to form ternary Na3SbSe4through two different routes: alcohol-mediated redox and alkahest amine-thiol approaches. In the former, the electrolyte was successfully synthesized in EtOH by using a similar redox solution coupled with Sb2Se3, Se, and NaOH as a basic reagent. In the alkahest approach, an amine-thiol solvent mixture is utilized for the dissolution of elemental Se and Na and further reaction with the binary precursor to obtain Na3SbSe4. Both routes produced electrolytes with room temperature ionic conductivity (∼0.2 mS cm–1) on par with reported performance from other conventional thermo-mechanical routes. These novel solution-phase approaches showcase the diversity and application of wet chemistry in producing selenide-based electrolytes for all-solid-state sodium batteries.