Enhanced electrochemical capabilities of lithium ion batteries by structurally ideal AAO separator

被引：51

作者：

Ahn, Yong-keon ^{[1
]}

Park, Junwoo ^{[1
]}

Shin, Dalwoo ^{[2
]}

Cho, Sanghun ^{[1
]}

Park, Si Yun ^{[1
]}

Kim, Hyunjin ^{[1
]}

Piao, Yuanzhe ^{[1
,3
]}

Yoo, Jeeyoung ^{[1
]}

Kim, Youn Sang ^{[1
,3
]}

机构：

[1] Seoul Natl Univ, Grad Sch Convergence Sci & Technol, Program Nano Sci & Technol, Seoul 151744, South Korea

[2] Korea JCC CO LTD, R&D Ctr, Cheongwon Gun 363922, Chungcheongbuk, South Korea

[3] Adv Inst Convergence Technol, Suwon 443270, Gyeonggi Do, South Korea

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2015年 / 3卷 / 20期

基金：

新加坡国家研究基金会;

关键词：

LI-ION; RECHARGEABLE BATTERIES; POLYMER ELECTROLYTES; THERMAL-STABILITY; ALUMINA; PERFORMANCE; DEPOSITION; MEMBRANE; PARTICLES; ANODE;

D O I：

10.1039/c5ta01892g

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：

In this study, a novel inorganic separator, porous anodic aluminum oxide (AAO), is introduced for a rechargeable lithium ion battery system. The highly ordered AAO gives rise to an ideal structure for battery separators with appropriate porosity (67.4 %), extremely low tortuosity, and thermal durability. The prepared AAO separator has average pore sizes of 75 nm and thickness of 54 mm, which leads to enhanced ionic conductivity (2.196 mS cm(-1)), discharging capacity at high current rates (20.13 mA h g(-1) at 10 C), and capacity retention (82.9%). Moreover, a computer simulation (COMSOL) model shows that the ideal AAO separator structure induces stable lithium ion battery operation in wide ranges of current rate, due to effective suppression of Li dendrite formation. The AAO separator has a strong potential in massive energy storage systems and electric vehicles.

引用

页码：10715 / 10719

页数：5

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