An aluminum-doped sodium manganese hexacyano ferrate cathode for high-rate safe Na-ion batteries†

IF 4.2 2区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY
P. Mohana Sundaram , S. K. Vineeth , Soumyashree Das Adhikari , C. Sanjaykumar , P. Sennu , Chhail Bihari Soni , Mahesh Chandra ,  Sungjemmenla , Hemant Kumar , Vipin Kumar
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引用次数: 0

Abstract

Aluminum (Al) doping in sodium manganese hexa-cyano-ferrate (NMHCF) stabilizes the cubic phase and suppresses multiphase formation. Doping reduces the particle size (∼0.35 μm), catalyzing the rate kinetics. Further Al-doping promotes aluminum-oxy-fluoride formation at the cathode electrolyte interphase for water in salt electrolytes, enabling safer, high-rate Na-ion battery performance.

Abstract Image

高速率安全钠离子电池用掺铝六氰高铁酸钠锰阴极
六氰高铁酸锰钠(NMHCF)阴极虽然具有很高的放电容量,但由于其不可避免的单斜态、立方态、四方态相变,其放电容量受到限制。研究表明,在NMHCF中掺入铝(Al)可以防止NMHCF的多相形成,并有利于立方相的形成。此外,与原始的NMHCF(~0.75µm)相比,Al掺杂可以形成更小的颗粒尺寸(~0.35µm)和更高的表面积,从而提高了速率动力学。除了稳定立方相外,Al的掺杂还促进了Al掺杂NMHCF (Al-NMHCF)阴极上氟化铝氧(AlOFx)阴极电解质间相(CEI)的形成,认为Al-NMHCF阴极为钠离子电池的安全、高倍率应用铺平了道路。
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来源期刊
Chemical Communications
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.
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