All-Solid-State Batteries with LiCoO2-Type Electrodes: Realization of an Impurity-Free Interface by Utilizing a Cosinterable Li3.5Ge0.5V0.5O4 Electrolyte,ACS Applied Energy Materials

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All-Solid-State Batteries with LiCoO2-Type Electrodes: Realization of an Impurity-Free Interface by Utilizing a Cosinterable Li3.5Ge0.5V0.5O4 Electrolyte
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-12-18 , DOI: 10.1021/acsaem.0c02785
Toyoki Okumura ₁ , Tomonari Takeuchi ₁ , Hironori Kobayashi ₁

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An impurity-free interface was achieved in an oxide-based all-solid-state battery (ASSB) after cosintering, which was facilitated by an enhanced thermal stability between the layered rock-salt LiMO₂ electrode materials (LiCoO₂ or LiNi_1/3Mn_1/3Co_1/3O₂ (NMC)) and a lithium superionic conductor (LISICON)-type Li_3.5Ge_0.5V_0.5O₄ (LGVO) electrolyte. The ionic conductivity of LGVO reached 9.6 × 10^–5 S cm^–1, which is the highest reported conductivity for an LISICON oxide. These characteristics facilitated a good reversible capacity in the NMC electrode in an ASSB fabricated via cosintering. The high interfacial thermal stability between LiMO₂ and LISICON is a useful property in the context of oxide-based ASSBs.

中文翻译：

具有LiCoO _2型电极的全固态电池：通过使用可共烧结的Li _3.5 Ge _0.5 V _0.5 O ₄电解质实现无杂质界面

共烧结后，在氧化物基全固态电池（ASSB）中实现了无杂质界面，这是由于层状岩盐LiMO ₂电极材料（LiCoO ₂或LiNi _1/3）之间增强的热稳定性而促进的Mn _1/3 Co _1/3 O ₂（NMC））和锂超离子导体（LISICON）型Li _3.5 Ge _0.5 V _0.5 O ₄（LGVO）电解质。LGVO的离子电导率达到9.6×10 ^–5 S cm ^–1，这是LISICON氧化物报道的最高电导率。这些特性促进了通过共烧结制造的ASSB中NMC电极的良好可逆容量。LiMO ₂和LISICON之间的高界面热稳定性是基于氧化物的ASSB的有用特性。

更新日期：2021-01-25

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