A High‐Capacity, Low‐Cost Layered Sodium Manganese Oxide Material as Cathode for Sodium‐Ion Batteries. Issue 8 (11th June 2014)

• Record Type: Journal Article
• Authors: Guo, Shaohua; Yu, Haijun; Jian, Zelang; Liu, Pan; Zhu, Yanbei; Guo, Xianwei; Chen, Mingwei; Ishida, Masayoshi; Zhou, Haoshen
• Is Part Of: ChemSusChem. Volume 7:Issue 8(2014:Aug.)
• Page Start: 2115
• Page End: 2119
• Publication Date: 2014-06-11
• Subjects: Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201402138
• Languages: English
• ISSNs: 1864-5631

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>A layered sodium manganese oxide material (NaMn₃O₅) is introduced as a novel cathode materials for sodium‐ion batteries. Structural characterizations reveal a typical Birnessite structure with lamellar stacking of the synthetic nanosheets. Electrochemical tests reveal a particularly large discharge capacity of 219 mAh g⁻¹ in the voltage rang of 1.5–4.7 V vs. Na/Na⁺. With an average potential of 2.75 V versus sodium metal, layered NaMn₃O₅ exhibits a high energy density of 602 Wh kg⁻¹, and also presents good rate capability. Furthermore, the diffusion coefficient of sodium ions in the layered NaMn₃O₅ electrode is investigated by using the galvanostatic intermittent titration technique. The results greatly contribute to the development of room‐temperature sodium‐ion batteries based on earth‐abundant elements.</p> </abstract>