提高钠电池电极性能的有效途径

IF 4.2 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Chemical Communications Pub Date : 2024-11-25 DOI:10.1039/d4cc04719b

Yosuke Ugata , Tomohiro Kuriyama , Naoaki Yabuuchi

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引用次数: 0

摘要

重新研究了一种mn基含钠层状氧化物P'2型Na2/3MnO2作为钠离子电池正极材料，并对其电化学性能的影响因素进行了研究。在牺牲可逆容量的前提下，提高循环过程中较低的截止电压可显著提高Na2/3MnO2的循环性能。此外，使用高浓度的电解质，消除了自由溶剂分子的存在，有效地抑制了Mn离子的溶解，从而实现了稳定的循环，在连续300次循环中保持了85%的容量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Efficient pathways to improve electrode performance of P′2 Na2/3MnO2 for sodium batteries†

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Efficient pathways to improve electrode performance of P′2 Na2/3MnO2 for sodium batteries†

A Mn-based sodium-containing layered oxide, P′2-type Na_2/3MnO₂, is revisited as a positive electrode material for sodium-ion batteries, and factors affecting its electrochemical performances are examined. The cyclability of Na_2/3MnO₂ is remarkably improved by increasing the lower cut-off voltage during cycling even though the reversible capacity is sacrificed. Furthermore, the use of highly concentrated electrolytes, in which the presence of free solvent molecules is eliminated, effectively suppresses the dissolution of Mn ions, thus enabling stable cycling with >85% capacity retention for 300 continuous cycles.

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来源期刊

Chemical Communications 化学-化学综合

CiteScore

8.60

自引率

4.10%

发文量

2705

审稿时长

1.4 months

期刊介绍： ChemComm (Chemical Communications) is renowned as the fastest publisher of articles providing information on new avenues of research, drawn from all the world''s major areas of chemical research.