Drastic Reduction of the Solid Electrolyte-Electrode Interface Resistance via Annealing in Battery Form

被引：13

作者：

Kobayashi, Shigeru ^{[4
]}

Arguelles, Elvis F. ^{[1
]}

Shirasawa, Tetsuroh ^{[2
]}

Kasamatsu, Shusuke ^{[3
]}

Shimizu, Koji ^{[1
]}

Nishio, Kazunori ^{[4
]}

Watanabe, Yuki ^{[4
]}

Kubota, Yusuke ^{[4
]}

Shimizu, Ryota ^{[4
,5
]}

Watanabe, Satoshi ^{[1
]}

Hitosugi, Taro ^{[1
]}

机构：

[1] Univ Tokyo, Dept Mat Engn, Tokyo 1138656, Japan

[2] Natl Inst Adv Ind Sci & Technol, Natl Metrol Inst Japan, Tsukuba, Ibaraki 3058565, Japan

[3] Yamagata Univ, Fac Sci, Yamagata 9908560, Japan

[4] Tokyo Inst Technol, Sch Mat & Chem Technol, Tokyo 1528552, Japan

[5] Japan Sci & Technol Agcy, PRESTO, Kawaguchi, Saitama 3320012, Japan

来源：

ACS APPLIED MATERIALS & INTERFACES | 2022年 / 14卷 / 02期

关键词：

all-solid-state lithium battery; interface resistance; interfacial reaction; annealing; X-ray crystal truncation rod scattering; first-principles calculation; LITHIUM; OXIDE; CONDUCTIVITY; STABILITY; ALIGNMENT; HYDROGEN; CRYSTAL; LICOO2;

D O I：

10.1021/acsami.1c17945

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The origin of electrical resistance at the interface between the positive electrode and solid electrolyte of an all-solid-state Li battery has not been fully determined. It is well known that the interface resistance increases when the electrode surface is exposed to air. However, an effective method of reducing this resistance has not been developed. This report demonstrates that drastic reduction of the resistance is achievable by annealing the entire battery cell. Exposing the LiCoO2 positive electrode surface to H2O vapor increases the resistance by more than 10 times (to greater than 136 Omega cm(2)). The magnitude can be reduced to the initial value (10.3 Omega cm(2)) by annealing the sample in a battery form. First-principles calculations reveal that the protons incorporated into the LiCoO2 structure are spontaneously deintercalated during annealing to restore the low-resistance interface. These results provide fundamental insights into the fabrication of high-performance all-solid-state Li batteries.

引用

页码：2703 / 2710

页数：8

共 47 条

[21] Migration mechanisms and diffusion barriers of carbon and native point defects in GaN [J].