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Garnet-Based All-Ceramic Lithium Battery Enabled by Li2.985B0.005OCl Solder.

ABSTRACT: Garnet-based bulk-type all-ceramic lithium battery (ACLB) is considered to be highly safe, but its electrochemical performance is severely hindered by the huge cathode/electrolyte interfacial resistance. Here, we demonstrate an in situ coated Li2.985B0.005OCl as sintering solder, which is uniformly coated on both LiCoO2 and Li7La3Zr2O12. With the low melting point (267°C) and high ionic conductivity (6.8 × 10-5 S cm-1), the Li2.985B0.005OCl solder not only restricts La/Co interdiffusion, but also provides fast Li+ transportation in the cathode. A low cathode/electrolyte interfacial resistance (386 ? cm2) is realized owing to the densification of the ACLB by hot-press sintering. The strain/stress of the LiCoO2 is also released by the small elasticity modulus of Li2.985B0.005OCl, leading to a superior cycling stability. The study sheds light on the design of advanced garnet-based bulk-type ACLB by exploring proper solders with higher ionic conductivity, lower melting point, and smaller elasticity modulus.

SUBMITTER: Feng W 

PROVIDER: S-EPMC7195548 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature

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Garnet-Based All-Ceramic Lithium Battery Enabled by Li<sub>2.985</sub>B<sub>0.005</sub>OCl Solder.

Feng Wuliang W   Lai Zhengzhe Z   Dong Xiaoli X   Li Panlong P   Wang Yonggang Y   Xia Yongyao Y  

iScience 20200418 5

Garnet-based bulk-type all-ceramic lithium battery (ACLB) is considered to be highly safe, but its electrochemical performance is severely hindered by the huge cathode/electrolyte interfacial resistance. Here, we demonstrate an in situ coated Li<sub>2.985</sub>B<sub>0.005</sub>OCl as sintering solder, which is uniformly coated on both LiCoO<sub>2</sub> and Li<sub>7</sub>La<sub>3</sub>Zr<sub>2</sub>O<sub>12</sub>. With the low melting point (267°C) and high ionic conductivity (6.8 × 10<sup>-5</su  ...[more]

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