Long Cycle Life All-Solid-State Sodium Ion Battery,ACS Applied Materials & Interfaces

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Long Cycle Life All-Solid-State Sodium Ion Battery
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-10-04 00:00:00 , DOI: 10.1021/acsami.8b12610
Jie Yue , Xiangyang Zhu , Fudong Han , Xiulin Fan , Luning Wang , Jian Yang ₁ , Chunsheng Wang

Affiliation

All-solid-state sodium ion batteries (ASIBs) based on sulfide electrolytes are considered a promising candidate for large-scale energy storage. However, the limited cycle life of ASIBs largely restricts their practical application. Cycling-stable ASIBs can be achieved only if the designed cathode can simultaneously address challenges including insufficient interfacial contact, electrochemical and chemical instability between the electrode and electrolyte, and strain/stress during operation , rather than just addressing one or part of these challenges. Chevrel phase Mo₆S₈ has inherent high electronic conductivity and small volume change during sodiation/desodiation, and is chemically and electrochemically stable with the sulfide electrolyte, and therefore the only challenge of using Mo₆S₈ as the cathode for ASIBs is the insufficient contact between Mo₆S₈ and the solid electrolyte (SE). Herein, a thin layer of SE is coated on Mo₆S₈ using a solution method to achieve an intimate contact between Mo₆S₈ and the SE. Such a SE-coated Mo₆S₈ cathode enabled an ASIB with a high cycling performance (500 cycles), even much better than that of the liquid-electrolyte batteries with the Mo₆S₈ cathode. This work provides valuable insights for developing long-cycle life ASIBs.

中文翻译：

长寿命全固态钠离子电池

基于硫化物电解质的全固态钠离子电池（ASIB）被认为是大规模储能的有希望的候选者。然而，ASIB的有限的循环寿命在很大程度上限制了它们的实际应用。只有设计的阴极可以同时解决以下挑战，包括界面接触不足，电极和电解质之间的电化学和化学不稳定性以及操作过程中的应变/应力，而不仅仅是解决这些挑战中的一个或一部分，才能实现循环稳定的ASIB。Chevrel相Mo ₆ S ₈具有固有的高电子电导率，并且在增氧/除氧过程中体积变化小，并且对硫化物电解质具有化学和电化学稳定性，因此使用Mo的唯一挑战作为ASIBs阴极的₆ S ₈是Mo ₆ S ₈与固体电解质（SE）之间的接触不足。在此，使用溶液法将SE的薄层涂覆在Mo ₆ S _8上以实现Mo ₆ S ₈和SE之间的紧密接触。这种带有SE涂层的Mo ₆ S ₈阴极可实现具有高循环性能（500次循环）的ASIB，甚至比具有Mo ₆ S ₈阴极的液体电解质电池还要好。这项工作为开发具有长寿命的ASIB提供了宝贵的见识。

更新日期：2018-10-04

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