Electrochemical and structural investigation of NaCrO2 as a positive electrode for sodium secondary battery using inorganic ionic liquid NaFSA-KFSA

被引：89

作者：

Chen, Chih-Yao ^{[1
]}

Matsumoto, Kazuhiko ^{[1
]}

Nohira, Toshiyuki ^{[1
]}

Hagiwara, Rika ^{[1
]}

Fukunaga, Atsushi ^{[1
,2
]}

Sakai, Shoichiro ^{[2
]}

Nitta, Koji ^{[2
]}

Inazawa, Shinji ^{[2
]}

机构：

[1] Kyoto Univ, Grad Sch Energy Sci, Sakyo Ku, Kyoto 6068501, Japan

[2] Sumitomo Elect Ind Ltd, Konohana Ku, Osaka 5540024, Japan

来源：

JOURNAL OF POWER SOURCES | 2013年 / 237卷

基金：

日本学术振兴会; 日本科学技术振兴机构;

关键词：

Sodium secondary battery; NaCrO2; Positive electrode; Structural analysis; Ionic liquid; Bis(fluorosulfonyl)amide; THERMAL-PROPERTIES; NA; PERFORMANCE; CATHODE; INTERCALATION; CHALLENGES; TEMPERATURES; INSERTION; LI; MN;

D O I：

10.1016/j.jpowsour.2013.03.006

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：

The electrochemical performance of NaCrO2 as a positive electrode material for an intermediate-temperature sodium secondary battery was evaluated in an inorganic ionic liquid, NaFSA-KFSA (FSA = bis(fluorosulfonyl)amide), at 363 K. The positive electrode using NaCrO2, acetylene black, and polytetrafluoroethylene exhibited a stable discharge capacity of 113 mA h g(-1) at a current density of 125 mA g(-1). The Coulombic efficiency and the capacity retention at the 100th cycle were 99.6% and 98.5%, respectively. Even at the very high current density of 2000 mA g(-1), the discharge capacity was maintained at 63 mA h g(-1). X-ray diffraction analyses revealed that the deintercalation of Na+ ion from NaCrO2 was associated with several phase transitions in the following sequence: rhombohedral O3, monoclinic O'3, and monoclinic P'3. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：52 / 57

页数：6

共 52 条

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