[1]朱国振,杨奇皓,余林和.不同形貌碳包覆铌酸钛微球的合成及其储锂性能研究[J].江西师范大学学报(自然科学版),2022,(06):551-557.[doi:10.16357/j.cnki.issn1000-5862.2022.06.01]
　ZHU Guozhen,YANG Qihao,YU Linhe.The Synthesis and Lithium Storage Properties of Carbon Coated TiNb2O7 Microspheres with Different Morphologies[J].Journal of Jiangxi Normal University:Natural Science Edition,2022,(06):551-557.[doi:10.16357/j.cnki.issn1000-5862.2022.06.01]
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不同形貌碳包覆铌酸钛微球的合成及其储锂性能研究()
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《江西师范大学学报》（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2022年06期
页码:
551-557
栏目:
化学
出版日期:
2022-11-25

文章信息/Info

Title:
The Synthesis and Lithium Storage Properties of Carbon Coated TiNb2O7 Microspheres with Different Morphologies
文章编号:
1000-5862(2022)06-0551-07
作者:
朱国振; 杨奇皓; 余林和
江西师范大学先进材料研究院,江西 南昌 330022)
Author(s):
ZHU Guozhen; YANG Qihao; YU Linhe
Advanced Materials Research Institute,Jiangxi Normal University,Nanchang Jiangxi 330022,China)
关键词:
铌酸钛;  喷雾干燥;  碳源;  储锂性能
Keywords:
TiNb2O7;  spray drying;  carbon source;  lithium storage performance
分类号:
TB 383; TM 911
DOI:
10.16357/j.cnki.issn1000-5862.2022.06.01
文献标志码:
A
摘要:
因为铌酸钛具有合适的放电电压平台、较长的循环寿命和较高的可逆比容量,所以其被认为是一种理想的锂离子电池负极材料,但因它导电能力差而大大限制了其实际应用.该文通过简易的喷雾干燥法制备了铌酸钛微球,然后将其分别与环糊精、蔗糖和聚乙烯吡咯烷酮混合,在氩气气氛下退火处理制备3种碳包覆的铌酸钛微球.电化学性能测试结果表明:以环糊精为碳源合成的铌酸钛微球展现出最好的倍率性能和循环稳定性,在10.00 C大电流密度下循环1 000圈后的可逆比容量保持为134.3 mA·h·g-1.
Abstract:
Titanium niobate is considered as an ideal anode material for lithium-ion batteries because of its suitable discharge voltage platform,long cycle life and high reversible specific capacity.However,its practical application is greatly limited by the poor conductivity.In this paper,TiNb2O7 microspheres are prepared by a simple spray drying method,and then mixed with cyclodextrin,sucrose and polyvinylpyrrolidone respectively,and annealed in argon atmosphere to prepare three kinds of carbon coated TiNb2O7 microspheres.The electrochemical performance test results show that TiNb2O7 microspheres synthesized with cyclodextrin as carbon source show the best rate performance and cycle stability.The reversible specific capacity of 134.3 mA·h·g-1 is maintained after 1 000 cycles at the high current density of 10.00 C.

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备注/Memo

备注/Memo:
收稿日期:2022-07-31
基金项目:国家自然科学基金(22263006)资助项目.
作者简介:朱国振(1988—),男,江西高安人,助理研究员,博士,主要从事新能源材料研究.E-mail:zhuguozhen@jxnu.edu.cn
更新日期/Last Update: 2022-11-25