| Al2O3包覆改善P2型Na2/3Fe1/2Mn1/2O2正极材料的存储性能 |
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| 引用本文： | 常轶娇,谢光辉,周雍茂,王接喜,王志兴,郭华军,尤编政,颜果春. Al2O3包覆改善P2型Na2/3Fe1/2Mn1/2O2正极材料的存储性能[J]. 中国有色金属学会会刊, 2022, 32(1): 262-272. DOI: 10.1016/S1003-6326(22)65792-3 |
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| 作者姓名： | 常轶娇 谢光辉 周雍茂 王接喜 王志兴 郭华军 尤编政 颜果春 |
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| 作者单位： | 中南大学冶金与环境学院 |
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| 基金项目： | financially supported by the Natural Science Foundation of Hunan Province,China(No.2020JJ5755);the National Natural Science Foundation of China(Nos.51804344,51704332,51874360);the Innovation and Entrepreneurship Project of Hunan Province,China(No.2018GK5026)。 |
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| 摘 要： | 采用超声喷雾热解与高温固相烧结相结合的方法合成P2型Na2/3Fe1/2Mn1/2O2材料。通过X射线衍射仪、扫描电子显微镜和电化学充放电设备对材料的结构、形貌和电化学性能进行全面的表征。此外,在Na2/3Fe1/2Mn1/2O2表面包覆Al2O3薄层,该包覆层可以抑制Na2CO3·H2O的形成,提高Na2/3Fe1/2Mn1/2O2材料的存储性能,从而改善其电化学性能。这种简单的表面改性方法为合成高性能钠离子电池正极材料提供了新思路。
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| 关 键 词： | Al2O3包覆 空气稳定性 喷雾热解 钠离子电池 铁锰氧化物 |
| 收稿时间： | 2021-02-15 |
Enhancing storage performance of P2-type Na2/3Fe1/2Mn1/2O2cathode materials by Al2O3coating |
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| Yi-jiao CHANG,Guang-hui XIE,Yong-mao ZHOU,Jie-xi WANG,Zhi-xing WANG,Hua-jun GUO,Bian-zheng YOU,Guo-chun YAN. Enhancing storage performance of P2-type Na2/3Fe1/2Mn1/2O2cathode materials by Al2O3coating[J]. Transactions of Nonferrous Metals Society of China, 2022, 32(1): 262-272. DOI: 10.1016/S1003-6326(22)65792-3 |
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| Authors: | Yi-jiao CHANG Guang-hui XIE Yong-mao ZHOU Jie-xi WANG Zhi-xing WANG Hua-jun GUO Bian-zheng YOU Guo-chun YAN |
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| Affiliation: | (School of Metallurgy and Environment,Central South University,Changsha 410083,China) |
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| Abstract: | The P2-type Na2/3Fe1/2Mn1/2O2 materials were synthesized by an ultrasonic spray pyrolysis followed by solid-state sintering method. The structures, morphologies and electrochemical performances of Na2/3Fe1/2Mn1/2O2 materials were characterized thoroughly by means of X-ray diffractometer, scanning electron microscope and electrochemical charge/discharge instruments. Moreover, a thin layer of Al2O3, which was formed on the surface of Na2/3Fe1/2Mn1/2O2, can enhance the storage performance by preventing the formation of Na2CO3·H2O, which is believed to enhance the electrochemical performances of Na2/3Fe1/2Mn1/2O2 materials. This facile surface modification method may pave a way to synthesize advanced cathode materials for sodium-ion batteries. |
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| Keywords: | Al2O3coating air-stability spray pyrolysis sodium-ion batteries iron-manganese oxide |
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