Dendrite-Free Lithium Deposition for Lithium Metal Anodes with Interconnected Microsphere Protection

被引：50

作者：

Lee, Yong-Gun ^{[1
]}

Ryu, Saebom ^{[1
]}

Sugimoto, Toshinori ^{[1
]}

Yu, Taehwan ^{[1
]}

Chang, Won-seok ^{[1
]}

Yang, Yooseong ^{[1
]}

Jung, Changhoon ^{[1
]}

Woo, Jaesung ^{[2
]}

Kang, Sung Gyu ^{[2
]}

Han, Heung Nam ^{[2
]}

Doo, Seok-Gwang ^{[1
]}

Hwang, Yunil ^{[1
]}

Chang, Hyuk ^{[1
]}

Lee, Jae-Myung ^{[1
]}

Sun, Jeong-Yun ^{[2
]}

机构：

[1] Samsung Elect Co Ltd, SALT, 130 Samsung Ro, Suwon 443803, Gyeonggi Do, South Korea

[2] Seoul Natl Univ, Dept Mat Sci & Engn, 1 Gwanak Ro, Seoul 151742, South Korea

来源：

CHEMISTRY OF MATERIALS | 2017年 / 29卷 / 14期

基金：

新加坡国家研究基金会;

关键词：

LOCAL CURRENT-DENSITY; POLYMER ELECTROLYTES; INTERFACIAL LAYER; DEFORMATION; MODULUS; BATTERIES; GROWTH;

D O I：

10.1021/acs.chemmater.7b01304

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A lithium (Li) metal anode is required to achieve a high-energy-density battery, but because of an undesirable growth of Li dendrites, it still has safety and cyclability issues. In this study, we have developed a microsphere-protected (MSP) Li metal anode to suppress the growth of Li dendrites. Microspheres could guide Li ions to selective areas and pressurize dendrites during their growth. Interconnections between microspheres improved the pressurization. By using an MSP Li metal anode in a 200 mAh pouch-type Li/NCA full cell at 4.2 V, dendrite-free Li deposits with a density of 0.4 g/cm(3), which is 3 times greater than that in the case of bare Li metal, were obtained after charging at 2.9 mAh/cm(2). The MSP Li metal enhanced the cyclability to 190 cycles with a criterion of 90% capacity retention of the initial discharge capacity at a current density of 1.45 mA/cm(2).

引用

页码：5906 / 5914

页数：9

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