文献类型：期刊文献

英文题名：Preparation of Low-Defect Manganese-Based Prussian Blue Cathode Materials with Cubic Structure for Sodium-Ion Batteries via Coprecipitation Method

作者：Dong, Xinyu Wang, Haifeng Wang, Jiawei Wang, Qian Wang, Hao Hao, Wenhao Lu, Fanghai

第一作者：Dong, Xinyu

通信作者：Wang, JW[1];Wang, JW[2];Wang, JW[3]

机构：[1]Guizhou Univ, Sch Mat & Met, Guiyang 550025, Peoples R China;[2]Guizhou Prov Engn Technol Res Ctr Manganese Mat Ba, Tongren 554300, Peoples R China;[3]Guizhou Prov Key Lab Met Engn & Energy Saving, Guiyang 550025, Peoples R China;[4]Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyang 550002, Peoples R China

第一机构：Guizhou Univ, Sch Mat & Met, Guiyang 550025, Peoples R China

通信机构：corresponding author), Guizhou Univ, Sch Mat & Met, Guiyang 550025, Peoples R China;corresponding author), Guizhou Prov Engn Technol Res Ctr Manganese Mat Ba, Tongren 554300, Peoples R China;corresponding author), Guizhou Prov Key Lab Met Engn & Energy Saving, Guiyang 550025, Peoples R China.

年份：2023

卷号：28

期号：21

外文期刊名：MOLECULES

收录：;Scopus(收录号：2-s2.0-85176580661);WOS:【SCI-EXPANDED(收录号:WOS:001103353700001)】；

基金：The funding supports for this study were obtained from key projects supported by science and technology in Guizhou Province ([2022]key020), projects supported by science and technology in Guizhou Province ([2023]243), major special projects in Guizhou Province ([2022]003), and the Tongren Science and Technology Plan Project ([2021]13). The authors sincerely thank the reviewers for their views and suggestions to further improve the quality of the manuscript.

语种：英文

外文关键词：Prussian blue analogs; sodium-ion battery; cathode materials; electrochemical performances

摘要：Sodium-ion batteries have important application prospects in large-scale energy storage due to their advantages, such as safety, affordability, and abundant resources. Prussian blue analogs (PBAs) have a stable and open framework structure, making them a very promising cathode material. However, high-performance manganese-based Prussian blue cathode materials for sodium-ion batteries still suffer from significant challenges due to several key issues, such as a high number of vacancy defects and a high crystal water content. This article investigates the effects of the Fe-Mn molar ratio, Mn ion concentration, and reaction time on the electrochemical performance of MnHCF during the coprecipitation process. When Fe:Mn = 1:2, c(Mn2+) = 0.02 mol/L, and the reaction time is 12 h, the content of interstitial water molecules in the sample is low, and the Fe(CN)(6) defects are few. At 0.1 C, the prepared electrode has a high initial discharge specific capacity (121.9 mAh g(-1)), and after 100 cycles at 0.2 C, the capacity retention rate is 65% (similar to 76.2 mAh g(-1)). Meanwhile, the sample electrode exhibits excellent reversibility. The discharge capacity can still be maintained at around 75% when the magnification is restored from 5 C to 0.1 C. The improvement in performance is mainly attributed to two aspects: On the one hand, reducing the Fe(CN)(6) defects and crystal water content is conducive to the diffusion and stable structure of N. On the other hand, reducing the reaction rate can significantly delay the crystallization of materials and optimize the nucleation process.